Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Olof Johansson:
 "Driver updates for ARM SoCs.  Some for SoC-family code under
  drivers/soc, but also some other driver updates that don't belong
  anywhere else.  We also bring in the drivers/reset code through
  arm-soc.

  Some of the larger updates:

   - Qualcomm support for SMEM, SMSM, SMP2P.  All used to communicate
     with other parts of the chip/board on these platforms, all
     proprietary protocols that don't fit into other subsystems and live
     in drivers/soc for now.

   - System bus driver for UniPhier

   - Driver for the TI Wakeup M3 IPC device

   - Power management for Raspberry PI

  + Again a bunch of other smaller updates and patches"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (38 commits)
  bus: uniphier: allow only built-in driver
  ARM: bcm2835: clarify RASPBERRYPI_FIRMWARE dependency
  MAINTAINERS: Drop Kumar Gala from QCOM
  bus: uniphier-system-bus: add UniPhier System Bus driver
  ARM: bcm2835: add rpi power domain driver
  dt-bindings: add rpi power domain driver bindings
  ARM: bcm2835: Define two new packets from the latest firmware.
  drivers/soc: make mediatek/mtk-scpsys.c explicitly non-modular
  soc: mediatek: SCPSYS: Add regulator support
  MAINTAINERS: Change QCOM entries
  soc: qcom: smd-rpm: Add existing platform support
  memory/tegra: Add number of TLB lines for Tegra124
  reset: hi6220: fix modular build
  soc: qcom: Introduce WCNSS_CTRL SMD client
  ARM: qcom: select ARM_CPU_SUSPEND for power management
  MAINTAINERS: Add rules for Qualcomm dts files
  soc: qcom: enable smsm/smp2p modular build
  serial: msm_serial: Make config tristate
  soc: qcom: smp2p: Qualcomm Shared Memory Point to Point
  soc: qcom: smsm: Add driver for Qualcomm SMSM
  ...

16 files changed, 2516 insertions, 3 deletions

diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index ad0df75fab6e..fb2b3935b658 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -1,5 +1,6 @@
 menu "SOC (System On Chip) specific Drivers"
 
+source "drivers/soc/bcm/Kconfig"
 source "drivers/soc/brcmstb/Kconfig"
 source "drivers/soc/fsl/qe/Kconfig"
 source "drivers/soc/mediatek/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 9b1c2e88dd0d..2afdc74f7491 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -2,6 +2,7 @@
 # Makefile for the Linux Kernel SOC specific device drivers.
 #
 
+obj-y				+= bcm/
 obj-$(CONFIG_SOC_BRCMSTB)	+= brcmstb/
 obj-$(CONFIG_ARCH_DOVE)		+= dove/
 obj-$(CONFIG_MACH_DOVE)		+= dove/
diff --git a/drivers/soc/bcm/Kconfig b/drivers/soc/bcm/Kconfig
new file mode 100644
index 000000000000..3066edea184d
--- /dev/null
+++ b/drivers/soc/bcm/Kconfig
@@ -0,0 +1,9 @@
+config RASPBERRYPI_POWER
+	bool "Raspberry Pi power domain driver"
+	depends on ARCH_BCM2835 || COMPILE_TEST
+	depends on RASPBERRYPI_FIRMWARE=y
+	select PM_GENERIC_DOMAINS if PM
+	select PM_GENERIC_DOMAINS_OF if PM
+	help
+	  This enables support for the RPi power domains which can be enabled
+	  or disabled via the RPi firmware.
diff --git a/drivers/soc/bcm/Makefile b/drivers/soc/bcm/Makefile
new file mode 100644
index 000000000000..63aa3eb23087
--- /dev/null
+++ b/drivers/soc/bcm/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_RASPBERRYPI_POWER)	+= raspberrypi-power.o
diff --git a/drivers/soc/bcm/raspberrypi-power.c b/drivers/soc/bcm/raspberrypi-power.c
new file mode 100644
index 000000000000..fe96a8b956fb
--- /dev/null
+++ b/drivers/soc/bcm/raspberrypi-power.c
@@ -0,0 +1,247 @@
+/* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Authors:
+ * Alexander Aring <aar@pengutronix.de>
+ * Eric Anholt <eric@anholt.net>
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <dt-bindings/power/raspberrypi-power.h>
+#include <soc/bcm2835/raspberrypi-firmware.h>
+
+/*
+ * Firmware indices for the old power domains interface.  Only a few
+ * of them were actually implemented.
+ */
+#define RPI_OLD_POWER_DOMAIN_USB		3
+#define RPI_OLD_POWER_DOMAIN_V3D		10
+
+struct rpi_power_domain {
+	u32 domain;
+	bool enabled;
+	bool old_interface;
+	struct generic_pm_domain base;
+	struct rpi_firmware *fw;
+};
+
+struct rpi_power_domains {
+	bool has_new_interface;
+	struct genpd_onecell_data xlate;
+	struct rpi_firmware *fw;
+	struct rpi_power_domain domains[RPI_POWER_DOMAIN_COUNT];
+};
+
+/*
+ * Packet definition used by RPI_FIRMWARE_SET_POWER_STATE and
+ * RPI_FIRMWARE_SET_DOMAIN_STATE
+ */
+struct rpi_power_domain_packet {
+	u32 domain;
+	u32 on;
+} __packet;
+
+/*
+ * Asks the firmware to enable or disable power on a specific power
+ * domain.
+ */
+static int rpi_firmware_set_power(struct rpi_power_domain *rpi_domain, bool on)
+{
+	struct rpi_power_domain_packet packet;
+
+	packet.domain = rpi_domain->domain;
+	packet.on = on;
+	return rpi_firmware_property(rpi_domain->fw,
+				     rpi_domain->old_interface ?
+				     RPI_FIRMWARE_SET_POWER_STATE :
+				     RPI_FIRMWARE_SET_DOMAIN_STATE,
+				     &packet, sizeof(packet));
+}
+
+static int rpi_domain_off(struct generic_pm_domain *domain)
+{
+	struct rpi_power_domain *rpi_domain =
+		container_of(domain, struct rpi_power_domain, base);
+
+	return rpi_firmware_set_power(rpi_domain, false);
+}
+
+static int rpi_domain_on(struct generic_pm_domain *domain)
+{
+	struct rpi_power_domain *rpi_domain =
+		container_of(domain, struct rpi_power_domain, base);
+
+	return rpi_firmware_set_power(rpi_domain, true);
+}
+
+static void rpi_common_init_power_domain(struct rpi_power_domains *rpi_domains,
+					 int xlate_index, const char *name)
+{
+	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
+
+	dom->fw = rpi_domains->fw;
+
+	dom->base.name = name;
+	dom->base.power_on = rpi_domain_on;
+	dom->base.power_off = rpi_domain_off;
+
+	/*
+	 * Treat all power domains as off at boot.
+	 *
+	 * The firmware itself may be keeping some domains on, but
+	 * from Linux's perspective all we control is the refcounts
+	 * that we give to the firmware, and we can't ask the firmware
+	 * to turn off something that we haven't ourselves turned on.
+	 */
+	pm_genpd_init(&dom->base, NULL, true);
+
+	rpi_domains->xlate.domains[xlate_index] = &dom->base;
+}
+
+static void rpi_init_power_domain(struct rpi_power_domains *rpi_domains,
+				  int xlate_index, const char *name)
+{
+	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
+
+	if (!rpi_domains->has_new_interface)
+		return;
+
+	/* The DT binding index is the firmware's domain index minus one. */
+	dom->domain = xlate_index + 1;
+
+	rpi_common_init_power_domain(rpi_domains, xlate_index, name);
+}
+
+static void rpi_init_old_power_domain(struct rpi_power_domains *rpi_domains,
+				      int xlate_index, int domain,
+				      const char *name)
+{
+	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
+
+	dom->old_interface = true;
+	dom->domain = domain;
+
+	rpi_common_init_power_domain(rpi_domains, xlate_index, name);
+}
+
+/*
+ * Detects whether the firmware supports the new power domains interface.
+ *
+ * The firmware doesn't actually return an error on an unknown tag,
+ * and just skips over it, so we do the detection by putting an
+ * unexpected value in the return field and checking if it was
+ * unchanged.
+ */
+static bool
+rpi_has_new_domain_support(struct rpi_power_domains *rpi_domains)
+{
+	struct rpi_power_domain_packet packet;
+	int ret;
+
+	packet.domain = RPI_POWER_DOMAIN_ARM;
+	packet.on = ~0;
+
+	ret = rpi_firmware_property(rpi_domains->fw,
+				    RPI_FIRMWARE_GET_DOMAIN_STATE,
+				    &packet, sizeof(packet));
+
+	return ret == 0 && packet.on != ~0;
+}
+
+static int rpi_power_probe(struct platform_device *pdev)
+{
+	struct device_node *fw_np;
+	struct device *dev = &pdev->dev;
+	struct rpi_power_domains *rpi_domains;
+
+	rpi_domains = devm_kzalloc(dev, sizeof(*rpi_domains), GFP_KERNEL);
+	if (!rpi_domains)
+		return -ENOMEM;
+
+	rpi_domains->xlate.domains =
+		devm_kzalloc(dev, sizeof(*rpi_domains->xlate.domains) *
+			     RPI_POWER_DOMAIN_COUNT, GFP_KERNEL);
+	if (!rpi_domains->xlate.domains)
+		return -ENOMEM;
+
+	rpi_domains->xlate.num_domains = RPI_POWER_DOMAIN_COUNT;
+
+	fw_np = of_parse_phandle(pdev->dev.of_node, "firmware", 0);
+	if (!fw_np) {
+		dev_err(&pdev->dev, "no firmware node\n");
+		return -ENODEV;
+	}
+
+	rpi_domains->fw = rpi_firmware_get(fw_np);
+	of_node_put(fw_np);
+	if (!rpi_domains->fw)
+		return -EPROBE_DEFER;
+
+	rpi_domains->has_new_interface =
+		rpi_has_new_domain_support(rpi_domains);
+
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C0, "I2C0");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C1, "I2C1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C2, "I2C2");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VIDEO_SCALER,
+			      "VIDEO_SCALER");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VPU1, "VPU1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_HDMI, "HDMI");
+
+	/*
+	 * Use the old firmware interface for USB power, so that we
+	 * can turn it on even if the firmware hasn't been updated.
+	 */
+	rpi_init_old_power_domain(rpi_domains, RPI_POWER_DOMAIN_USB,
+				  RPI_OLD_POWER_DOMAIN_USB, "USB");
+
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VEC, "VEC");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_JPEG, "JPEG");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_H264, "H264");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_V3D, "V3D");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_ISP, "ISP");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_UNICAM0, "UNICAM0");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_UNICAM1, "UNICAM1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CCP2RX, "CCP2RX");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CSI2, "CSI2");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CPI, "CPI");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_DSI0, "DSI0");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_DSI1, "DSI1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_TRANSPOSER,
+			      "TRANSPOSER");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CCP2TX, "CCP2TX");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CDP, "CDP");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_ARM, "ARM");
+
+	of_genpd_add_provider_onecell(dev->of_node, &rpi_domains->xlate);
+
+	platform_set_drvdata(pdev, rpi_domains);
+
+	return 0;
+}
+
+static const struct of_device_id rpi_power_of_match[] = {
+	{ .compatible = "raspberrypi,bcm2835-power", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, rpi_power_of_match);
+
+static struct platform_driver rpi_power_driver = {
+	.driver = {
+		.name = "raspberrypi-power",
+		.of_match_table = rpi_power_of_match,
+	},
+	.probe		= rpi_power_probe,
+};
+builtin_platform_driver(rpi_power_driver);
+
+MODULE_AUTHOR("Alexander Aring <aar@pengutronix.de>");
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_DESCRIPTION("Raspberry Pi power domain driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 4d4203c896c4..0221387e5e27 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -15,12 +15,13 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/regmap.h>
 #include <linux/soc/mediatek/infracfg.h>
+#include <linux/regulator/consumer.h>
 #include <dt-bindings/power/mt8173-power.h>
 
 #define SPM_VDE_PWR_CON			0x0210
@@ -179,6 +180,7 @@ struct scp_domain {
 	u32 sram_pdn_ack_bits;
 	u32 bus_prot_mask;
 	bool active_wakeup;
+	struct regulator *supply;
 };
 
 struct scp {
@@ -221,6 +223,12 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
 	int ret;
 	int i;
 
+	if (scpd->supply) {
+		ret = regulator_enable(scpd->supply);
+		if (ret)
+			return ret;
+	}
+
 	for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++) {
 		ret = clk_prepare_enable(scpd->clk[i]);
 		if (ret) {
@@ -299,6 +307,9 @@ err_pwr_ack:
 			clk_disable_unprepare(scpd->clk[i]);
 	}
 err_clk:
+	if (scpd->supply)
+		regulator_disable(scpd->supply);
+
 	dev_err(scp->dev, "Failed to power on domain %s\n", genpd->name);
 
 	return ret;
@@ -379,6 +390,9 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
 	for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++)
 		clk_disable_unprepare(scpd->clk[i]);
 
+	if (scpd->supply)
+		regulator_disable(scpd->supply);
+
 	return 0;
 
 out:
@@ -448,6 +462,19 @@ static int __init scpsys_probe(struct platform_device *pdev)
 		return PTR_ERR(scp->infracfg);
 	}
 
+	for (i = 0; i < NUM_DOMAINS; i++) {
+		struct scp_domain *scpd = &scp->domains[i];
+		const struct scp_domain_data *data = &scp_domain_data[i];
+
+		scpd->supply = devm_regulator_get_optional(&pdev->dev, data->name);
+		if (IS_ERR(scpd->supply)) {
+			if (PTR_ERR(scpd->supply) == -ENODEV)
+				scpd->supply = NULL;
+			else
+				return PTR_ERR(scpd->supply);
+		}
+	}
+
 	pd_data->num_domains = NUM_DOMAINS;
 
 	for (i = 0; i < NUM_DOMAINS; i++) {
@@ -521,5 +548,4 @@ static struct platform_driver scpsys_drv = {
 		.of_match_table = of_match_ptr(of_scpsys_match_tbl),
 	},
 };
-
-module_platform_driver_probe(scpsys_drv, scpsys_probe);
+builtin_platform_driver_probe(scpsys_drv, scpsys_probe);
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index eec76141d9b9..461b387d03cc 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -13,6 +13,7 @@ config QCOM_GSBI
 config QCOM_PM
 	bool "Qualcomm Power Management"
 	depends on ARCH_QCOM && !ARM64
+	select ARM_CPU_SUSPEND
 	select QCOM_SCM
 	help
 	  QCOM Platform specific power driver to manage cores and L2 low power
@@ -49,3 +50,29 @@ config QCOM_SMD_RPM
 
 	  Say M here if you want to include support for the Qualcomm RPM as a
 	  module. This will build a module called "qcom-smd-rpm".
+
+config QCOM_SMEM_STATE
+	bool
+
+config QCOM_SMP2P
+	tristate "Qualcomm Shared Memory Point to Point support"
+	depends on QCOM_SMEM
+	select QCOM_SMEM_STATE
+	help
+	  Say yes here to support the Qualcomm Shared Memory Point to Point
+	  protocol.
+
+config QCOM_SMSM
+	tristate "Qualcomm Shared Memory State Machine"
+	depends on QCOM_SMEM
+	select QCOM_SMEM_STATE
+	help
+	  Say yes here to support the Qualcomm Shared Memory State Machine.
+	  The state machine is represented by bits in shared memory.
+
+config QCOM_WCNSS_CTRL
+	tristate "Qualcomm WCNSS control driver"
+	depends on QCOM_SMD
+	help
+	  Client driver for the WCNSS_CTRL SMD channel, used to download nv
+	  firmware to a newly booted WCNSS chip.
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index 10a93d168e0e..fdd664edf0bd 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -3,3 +3,7 @@ obj-$(CONFIG_QCOM_PM)	+=	spm.o
 obj-$(CONFIG_QCOM_SMD) +=	smd.o
 obj-$(CONFIG_QCOM_SMD_RPM)	+= smd-rpm.o
 obj-$(CONFIG_QCOM_SMEM) +=	smem.o
+obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o
+obj-$(CONFIG_QCOM_SMP2P)	+= smp2p.o
+obj-$(CONFIG_QCOM_SMSM)	+= smsm.o
+obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o
diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c
index 2969321e1b09..731fa066f712 100644
--- a/drivers/soc/qcom/smd-rpm.c
+++ b/drivers/soc/qcom/smd-rpm.c
@@ -219,6 +219,8 @@ static void qcom_smd_rpm_remove(struct qcom_smd_device *sdev)
 }
 
 static const struct of_device_id qcom_smd_rpm_of_match[] = {
+	{ .compatible = "qcom,rpm-apq8084" },
+	{ .compatible = "qcom,rpm-msm8916" },
 	{ .compatible = "qcom,rpm-msm8974" },
 	{}
 };
diff --git a/drivers/soc/qcom/smem_state.c b/drivers/soc/qcom/smem_state.c
new file mode 100644
index 000000000000..54261decb369
--- /dev/null
+++ b/drivers/soc/qcom/smem_state.c
@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2015, Sony Mobile Communications Inc.
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/soc/qcom/smem_state.h>
+
+static LIST_HEAD(smem_states);
+static DEFINE_MUTEX(list_lock);
+
+/**
+ * struct qcom_smem_state - state context
+ * @refcount:	refcount for the state
+ * @orphan:	boolean indicator that this state has been unregistered
+ * @list:	entry in smem_states list
+ * @of_node:	of_node to use for matching the state in DT
+ * @priv:	implementation private data
+ * @ops:	ops for the state
+ */
+struct qcom_smem_state {
+	struct kref refcount;
+	bool orphan;
+
+	struct list_head list;
+	struct device_node *of_node;
+
+	void *priv;
+
+	struct qcom_smem_state_ops ops;
+};
+
+/**
+ * qcom_smem_state_update_bits() - update the masked bits in state with value
+ * @state:	state handle acquired by calling qcom_smem_state_get()
+ * @mask:	bit mask for the change
+ * @value:	new value for the masked bits
+ *
+ * Returns 0 on success, otherwise negative errno.
+ */
+int qcom_smem_state_update_bits(struct qcom_smem_state *state,
+				u32 mask,
+				u32 value)
+{
+	if (state->orphan)
+		return -ENXIO;
+
+	if (!state->ops.update_bits)
+		return -ENOTSUPP;
+
+	return state->ops.update_bits(state->priv, mask, value);
+}
+EXPORT_SYMBOL_GPL(qcom_smem_state_update_bits);
+
+static struct qcom_smem_state *of_node_to_state(struct device_node *np)
+{
+	struct qcom_smem_state *state;
+
+	mutex_lock(&list_lock);
+
+	list_for_each_entry(state, &smem_states, list) {
+		if (state->of_node == np) {
+			kref_get(&state->refcount);
+			goto unlock;
+		}
+	}
+	state = ERR_PTR(-EPROBE_DEFER);
+
+unlock:
+	mutex_unlock(&list_lock);
+
+	return state;
+}
+
+/**
+ * qcom_smem_state_get() - acquire handle to a state
+ * @dev:	client device pointer
+ * @con_id:	name of the state to lookup
+ * @bit:	flags from the state reference, indicating which bit's affected
+ *
+ * Returns handle to the state, or ERR_PTR(). qcom_smem_state_put() must be
+ * called to release the returned state handle.
+ */
+struct qcom_smem_state *qcom_smem_state_get(struct device *dev,
+					    const char *con_id,
+					    unsigned *bit)
+{
+	struct qcom_smem_state *state;
+	struct of_phandle_args args;
+	int index = 0;
+	int ret;
+
+	if (con_id) {
+		index = of_property_match_string(dev->of_node,
+						 "qcom,state-names",
+						 con_id);
+		if (index < 0) {
+			dev_err(dev, "missing qcom,state-names\n");
+			return ERR_PTR(index);
+		}
+	}
+
+	ret = of_parse_phandle_with_args(dev->of_node,
+					 "qcom,state",
+					 "#qcom,state-cells",
+					 index,
+					 &args);
+	if (ret) {
+		dev_err(dev, "failed to parse qcom,state property\n");
+		return ERR_PTR(ret);
+	}
+
+	if (args.args_count != 1) {
+		dev_err(dev, "invalid #qcom,state-cells\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	state = of_node_to_state(args.np);
+	if (IS_ERR(state))
+		goto put;
+
+	*bit = args.args[0];
+
+put:
+	of_node_put(args.np);
+	return state;
+}
+EXPORT_SYMBOL_GPL(qcom_smem_state_get);
+
+static void qcom_smem_state_release(struct kref *ref)
+{
+	struct qcom_smem_state *state = container_of(ref, struct qcom_smem_state, refcount);
+
+	list_del(&state->list);
+	kfree(state);
+}
+
+/**
+ * qcom_smem_state_put() - release state handle
+ * @state:	state handle to be released
+ */
+void qcom_smem_state_put(struct qcom_smem_state *state)
+{
+	mutex_lock(&list_lock);
+	kref_put(&state->refcount, qcom_smem_state_release);
+	mutex_unlock(&list_lock);
+}
+EXPORT_SYMBOL_GPL(qcom_smem_state_put);
+
+/**
+ * qcom_smem_state_register() - register a new state
+ * @of_node:	of_node used for matching client lookups
+ * @ops:	implementation ops
+ * @priv:	implementation specific private data
+ */
+struct qcom_smem_state *qcom_smem_state_register(struct device_node *of_node,
+						 const struct qcom_smem_state_ops *ops,
+						 void *priv)
+{
+	struct qcom_smem_state *state;
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return ERR_PTR(-ENOMEM);
+
+	kref_init(&state->refcount);
+
+	state->of_node = of_node;
+	state->ops = *ops;
+	state->priv = priv;
+
+	mutex_lock(&list_lock);
+	list_add(&state->list, &smem_states);
+	mutex_unlock(&list_lock);
+
+	return state;
+}
+EXPORT_SYMBOL_GPL(qcom_smem_state_register);
+
+/**
+ * qcom_smem_state_unregister() - unregister a registered state
+ * @state:	state handle to be unregistered
+ */
+void qcom_smem_state_unregister(struct qcom_smem_state *state)
+{
+	state->orphan = true;
+	qcom_smem_state_put(state);
+}
+EXPORT_SYMBOL_GPL(qcom_smem_state_unregister);
diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c
new file mode 100644
index 000000000000..f1eed7f9dd67
--- /dev/null
+++ b/drivers/soc/qcom/smp2p.c
@@ -0,0 +1,578 @@
+/*
+ * Copyright (c) 2015, Sony Mobile Communications AB.
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+#include <linux/spinlock.h>
+
+/*
+ * The Shared Memory Point to Point (SMP2P) protocol facilitates communication
+ * of a single 32-bit value between two processors.  Each value has a single
+ * writer (the local side) and a single reader (the remote side). Values are
+ * uniquely identified in the system by the directed edge (local processor ID
+ * to remote processor ID) and a string identifier.
+ *
+ * Each processor is responsible for creating the outgoing SMEM items and each
+ * item is writable by the local processor and readable by the remote
+ * processor.  By using two separate SMEM items that are single-reader and
+ * single-writer, SMP2P does not require any remote locking mechanisms.
+ *
+ * The driver uses the Linux GPIO and interrupt framework to expose a virtual
+ * GPIO for each outbound entry and a virtual interrupt controller for each
+ * inbound entry.
+ */
+
+#define SMP2P_MAX_ENTRY 16
+#define SMP2P_MAX_ENTRY_NAME 16
+
+#define SMP2P_FEATURE_SSR_ACK 0x1
+
+#define SMP2P_MAGIC 0x504d5324
+
+/**
+ * struct smp2p_smem_item - in memory communication structure
+ * @magic:		magic number
+ * @version:		version - must be 1
+ * @features:		features flag - currently unused
+ * @local_pid:		processor id of sending end
+ * @remote_pid:		processor id of receiving end
+ * @total_entries:	number of entries - always SMP2P_MAX_ENTRY
+ * @valid_entries:	number of allocated entries
+ * @flags:
+ * @entries:		individual communication entries
+ *     @name:		name of the entry
+ *     @value:		content of the entry
+ */
+struct smp2p_smem_item {
+	u32 magic;
+	u8 version;
+	unsigned features:24;
+	u16 local_pid;
+	u16 remote_pid;
+	u16 total_entries;
+	u16 valid_entries;
+	u32 flags;
+
+	struct {
+		u8 name[SMP2P_MAX_ENTRY_NAME];
+		u32 value;
+	} entries[SMP2P_MAX_ENTRY];
+} __packed;
+
+/**
+ * struct smp2p_entry - driver context matching one entry
+ * @node:	list entry to keep track of allocated entries
+ * @smp2p:	reference to the device driver context
+ * @name:	name of the entry, to match against smp2p_smem_item
+ * @value:	pointer to smp2p_smem_item entry value
+ * @last_value:	last handled value
+ * @domain:	irq_domain for inbound entries
+ * @irq_enabled:bitmap to track enabled irq bits
+ * @irq_rising:	bitmap to mark irq bits for rising detection
+ * @irq_falling:bitmap to mark irq bits for falling detection
+ * @state:	smem state handle
+ * @lock:	spinlock to protect read-modify-write of the value
+ */
+struct smp2p_entry {
+	struct list_head node;
+	struct qcom_smp2p *smp2p;
+
+	const char *name;
+	u32 *value;
+	u32 last_value;
+
+	struct irq_domain *domain;
+	DECLARE_BITMAP(irq_enabled, 32);
+	DECLARE_BITMAP(irq_rising, 32);
+	DECLARE_BITMAP(irq_falling, 32);
+
+	struct qcom_smem_state *state;
+
+	spinlock_t lock;
+};
+
+#define SMP2P_INBOUND	0
+#define SMP2P_OUTBOUND	1
+
+/**
+ * struct qcom_smp2p - device driver context
+ * @dev:	device driver handle
+ * @in:		pointer to the inbound smem item
+ * @smem_items:	ids of the two smem items
+ * @valid_entries: already scanned inbound entries
+ * @local_pid:	processor id of the inbound edge
+ * @remote_pid:	processor id of the outbound edge
+ * @ipc_regmap:	regmap for the outbound ipc
+ * @ipc_offset:	offset within the regmap
+ * @ipc_bit:	bit in regmap@offset to kick to signal remote processor
+ * @inbound:	list of inbound entries
+ * @outbound:	list of outbound entries
+ */
+struct qcom_smp2p {
+	struct device *dev;
+
+	struct smp2p_smem_item *in;
+	struct smp2p_smem_item *out;
+
+	unsigned smem_items[SMP2P_OUTBOUND + 1];
+
+	unsigned valid_entries;
+
+	unsigned local_pid;
+	unsigned remote_pid;
+
+	struct regmap *ipc_regmap;
+	int ipc_offset;
+	int ipc_bit;
+
+	struct list_head inbound;
+	struct list_head outbound;
+};
+
+static void qcom_smp2p_kick(struct qcom_smp2p *smp2p)
+{
+	/* Make sure any updated data is written before the kick */
+	wmb();
+	regmap_write(smp2p->ipc_regmap, smp2p->ipc_offset, BIT(smp2p->ipc_bit));
+}
+
+/**
+ * qcom_smp2p_intr() - interrupt handler for incoming notifications
+ * @irq:	unused
+ * @data:	smp2p driver context
+ *
+ * Handle notifications from the remote side to handle newly allocated entries
+ * or any changes to the state bits of existing entries.
+ */
+static irqreturn_t qcom_smp2p_intr(int irq, void *data)
+{
+	struct smp2p_smem_item *in;
+	struct smp2p_entry *entry;
+	struct qcom_smp2p *smp2p = data;
+	unsigned smem_id = smp2p->smem_items[SMP2P_INBOUND];
+	unsigned pid = smp2p->remote_pid;
+	size_t size;
+	int irq_pin;
+	u32 status;
+	char buf[SMP2P_MAX_ENTRY_NAME];
+	u32 val;
+	int i;
+
+	in = smp2p->in;
+
+	/* Acquire smem item, if not already found */
+	if (!in) {
+		in = qcom_smem_get(pid, smem_id, &size);
+		if (IS_ERR(in)) {
+			dev_err(smp2p->dev,
+				"Unable to acquire remote smp2p item\n");
+			return IRQ_HANDLED;
+		}
+
+		smp2p->in = in;
+	}
+
+	/* Match newly created entries */
+	for (i = smp2p->valid_entries; i < in->valid_entries; i++) {
+		list_for_each_entry(entry, &smp2p->inbound, node) {
+			memcpy_fromio(buf, in->entries[i].name, sizeof(buf));
+			if (!strcmp(buf, entry->name)) {
+				entry->value = &in->entries[i].value;
+				break;
+			}
+		}
+	}
+	smp2p->valid_entries = i;
+
+	/* Fire interrupts based on any value changes */
+	list_for_each_entry(entry, &smp2p->inbound, node) {
+		/* Ignore entries not yet allocated by the remote side */
+		if (!entry->value)
+			continue;
+
+		val = readl(entry->value);
+
+		status = val ^ entry->last_value;
+		entry->last_value = val;
+
+		/* No changes of this entry? */
+		if (!status)
+			continue;
+
+		for_each_set_bit(i, entry->irq_enabled, 32) {
+			if (!(status & BIT(i)))
+				continue;
+
+			if ((val & BIT(i) && test_bit(i, entry->irq_rising)) ||
+			    (!(val & BIT(i)) && test_bit(i, entry->irq_falling))) {
+				irq_pin = irq_find_mapping(entry->domain, i);
+				handle_nested_irq(irq_pin);
+			}
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void smp2p_mask_irq(struct irq_data *irqd)
+{
+	struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
+	irq_hw_number_t irq = irqd_to_hwirq(irqd);
+
+	clear_bit(irq, entry->irq_enabled);
+}
+
+static void smp2p_unmask_irq(struct irq_data *irqd)
+{
+	struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
+	irq_hw_number_t irq = irqd_to_hwirq(irqd);
+
+	set_bit(irq, entry->irq_enabled);
+}
+
+static int smp2p_set_irq_type(struct irq_data *irqd, unsigned int type)
+{
+	struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
+	irq_hw_number_t irq = irqd_to_hwirq(irqd);
+
+	if (!(type & IRQ_TYPE_EDGE_BOTH))
+		return -EINVAL;
+
+	if (type & IRQ_TYPE_EDGE_RISING)
+		set_bit(irq, entry->irq_rising);
+	else
+		clear_bit(irq, entry->irq_rising);
+
+	if (type & IRQ_TYPE_EDGE_FALLING)
+		set_bit(irq, entry->irq_falling);
+	else
+		clear_bit(irq, entry->irq_falling);
+
+	return 0;
+}
+
+static struct irq_chip smp2p_irq_chip = {
+	.name           = "smp2p",
+	.irq_mask       = smp2p_mask_irq,
+	.irq_unmask     = smp2p_unmask_irq,
+	.irq_set_type	= smp2p_set_irq_type,
+};
+
+static int smp2p_irq_map(struct irq_domain *d,
+			 unsigned int irq,
+			 irq_hw_number_t hw)
+{
+	struct smp2p_entry *entry = d->host_data;
+
+	irq_set_chip_and_handler(irq, &smp2p_irq_chip, handle_level_irq);
+	irq_set_chip_data(irq, entry);
+	irq_set_nested_thread(irq, 1);
+	irq_set_noprobe(irq);
+
+	return 0;
+}
+
+static const struct irq_domain_ops smp2p_irq_ops = {
+	.map = smp2p_irq_map,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+static int qcom_smp2p_inbound_entry(struct qcom_smp2p *smp2p,
+				    struct smp2p_entry *entry,
+				    struct device_node *node)
+{
+	entry->domain = irq_domain_add_linear(node, 32, &smp2p_irq_ops, entry);
+	if (!entry->domain) {
+		dev_err(smp2p->dev, "failed to add irq_domain\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static int smp2p_update_bits(void *data, u32 mask, u32 value)
+{
+	struct smp2p_entry *entry = data;
+	u32 orig;
+	u32 val;
+
+	spin_lock(&entry->lock);
+	val = orig = readl(entry->value);
+	val &= ~mask;
+	val |= value;
+	writel(val, entry->value);
+	spin_unlock(&entry->lock);
+
+	if (val != orig)
+		qcom_smp2p_kick(entry->smp2p);
+
+	return 0;
+}
+
+static const struct qcom_smem_state_ops smp2p_state_ops = {
+	.update_bits = smp2p_update_bits,
+};
+
+static int qcom_smp2p_outbound_entry(struct qcom_smp2p *smp2p,
+				     struct smp2p_entry *entry,
+				     struct device_node *node)
+{
+	struct smp2p_smem_item *out = smp2p->out;
+	char buf[SMP2P_MAX_ENTRY_NAME] = {};
+
+	/* Allocate an entry from the smem item */
+	strlcpy(buf, entry->name, SMP2P_MAX_ENTRY_NAME);
+	memcpy_toio(out->entries[out->valid_entries].name, buf, SMP2P_MAX_ENTRY_NAME);
+	out->valid_entries++;
+
+	/* Make the logical entry reference the physical value */
+	entry->value = &out->entries[out->valid_entries].value;
+
+	entry->state = qcom_smem_state_register(node, &smp2p_state_ops, entry);
+	if (IS_ERR(entry->state)) {
+		dev_err(smp2p->dev, "failed to register qcom_smem_state\n");
+		return PTR_ERR(entry->state);
+	}
+
+	return 0;
+}
+
+static int qcom_smp2p_alloc_outbound_item(struct qcom_smp2p *smp2p)
+{
+	struct smp2p_smem_item *out;
+	unsigned smem_id = smp2p->smem_items[SMP2P_OUTBOUND];
+	unsigned pid = smp2p->remote_pid;
+	int ret;
+
+	ret = qcom_smem_alloc(pid, smem_id, sizeof(*out));
+	if (ret < 0 && ret != -EEXIST) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(smp2p->dev,
+				"unable to allocate local smp2p item\n");
+		return ret;
+	}
+
+	out = qcom_smem_get(pid, smem_id, NULL);
+	if (IS_ERR(out)) {
+		dev_err(smp2p->dev, "Unable to acquire local smp2p item\n");
+		return PTR_ERR(out);
+	}
+
+	memset(out, 0, sizeof(*out));
+	out->magic = SMP2P_MAGIC;
+	out->local_pid = smp2p->local_pid;
+	out->remote_pid = smp2p->remote_pid;
+	out->total_entries = SMP2P_MAX_ENTRY;
+	out->valid_entries = 0;
+
+	/*
+	 * Make sure the rest of the header is written before we validate the
+	 * item by writing a valid version number.
+	 */
+	wmb();
+	out->version = 1;
+
+	qcom_smp2p_kick(smp2p);
+
+	smp2p->out = out;
+
+	return 0;
+}
+
+static int smp2p_parse_ipc(struct qcom_smp2p *smp2p)
+{
+	struct device_node *syscon;
+	struct device *dev = smp2p->dev;
+	const char *key;
+	int ret;
+
+	syscon = of_parse_phandle(dev->of_node, "qcom,ipc", 0);
+	if (!syscon) {
+		dev_err(dev, "no qcom,ipc node\n");
+		return -ENODEV;
+	}
+
+	smp2p->ipc_regmap = syscon_node_to_regmap(syscon);
+	if (IS_ERR(smp2p->ipc_regmap))
+		return PTR_ERR(smp2p->ipc_regmap);
+
+	key = "qcom,ipc";
+	ret = of_property_read_u32_index(dev->of_node, key, 1, &smp2p->ipc_offset);
+	if (ret < 0) {
+		dev_err(dev, "no offset in %s\n", key);
+		return -EINVAL;
+	}
+
+	ret = of_property_read_u32_index(dev->of_node, key, 2, &smp2p->ipc_bit);
+	if (ret < 0) {
+		dev_err(dev, "no bit in %s\n", key);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int qcom_smp2p_probe(struct platform_device *pdev)
+{
+	struct smp2p_entry *entry;
+	struct device_node *node;
+	struct qcom_smp2p *smp2p;
+	const char *key;
+	int irq;
+	int ret;
+
+	smp2p = devm_kzalloc(&pdev->dev, sizeof(*smp2p), GFP_KERNEL);
+	if (!smp2p)
+		return -ENOMEM;
+
+	smp2p->dev = &pdev->dev;
+	INIT_LIST_HEAD(&smp2p->inbound);
+	INIT_LIST_HEAD(&smp2p->outbound);
+
+	platform_set_drvdata(pdev, smp2p);
+
+	ret = smp2p_parse_ipc(smp2p);
+	if (ret)
+		return ret;
+
+	key = "qcom,smem";
+	ret = of_property_read_u32_array(pdev->dev.of_node, key,
+					 smp2p->smem_items, 2);
+	if (ret)
+		return ret;
+
+	key = "qcom,local-pid";
+	ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->local_pid);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to read %s\n", key);
+		return -EINVAL;
+	}
+
+	key = "qcom,remote-pid";
+	ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->remote_pid);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to read %s\n", key);
+		return -EINVAL;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "unable to acquire smp2p interrupt\n");
+		return irq;
+	}
+
+	ret = qcom_smp2p_alloc_outbound_item(smp2p);
+	if (ret < 0)
+		return ret;
+
+	for_each_available_child_of_node(pdev->dev.of_node, node) {
+		entry = devm_kzalloc(&pdev->dev, sizeof(*entry), GFP_KERNEL);
+		if (!entry) {
+			ret = -ENOMEM;
+			goto unwind_interfaces;
+		}
+
+		entry->smp2p = smp2p;
+		spin_lock_init(&entry->lock);
+
+		ret = of_property_read_string(node, "qcom,entry-name", &entry->name);
+		if (ret < 0)
+			goto unwind_interfaces;
+
+		if (of_property_read_bool(node, "interrupt-controller")) {
+			ret = qcom_smp2p_inbound_entry(smp2p, entry, node);
+			if (ret < 0)
+				goto unwind_interfaces;
+
+			list_add(&entry->node, &smp2p->inbound);
+		} else  {
+			ret = qcom_smp2p_outbound_entry(smp2p, entry, node);
+			if (ret < 0)
+				goto unwind_interfaces;
+
+			list_add(&entry->node, &smp2p->outbound);
+		}
+	}
+
+	/* Kick the outgoing edge after allocating entries */
+	qcom_smp2p_kick(smp2p);
+
+	ret = devm_request_threaded_irq(&pdev->dev, irq,
+					NULL, qcom_smp2p_intr,
+					IRQF_ONESHOT,
+					"smp2p", (void *)smp2p);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to request interrupt\n");
+		goto unwind_interfaces;
+	}
+
+
+	return 0;
+
+unwind_interfaces:
+	list_for_each_entry(entry, &smp2p->inbound, node)
+		irq_domain_remove(entry->domain);
+
+	list_for_each_entry(entry, &smp2p->outbound, node)
+		qcom_smem_state_unregister(entry->state);
+
+	smp2p->out->valid_entries = 0;
+
+	return ret;
+}
+
+static int qcom_smp2p_remove(struct platform_device *pdev)
+{
+	struct qcom_smp2p *smp2p = platform_get_drvdata(pdev);
+	struct smp2p_entry *entry;
+
+	list_for_each_entry(entry, &smp2p->inbound, node)
+		irq_domain_remove(entry->domain);
+
+	list_for_each_entry(entry, &smp2p->outbound, node)
+		qcom_smem_state_unregister(entry->state);
+
+	smp2p->out->valid_entries = 0;
+
+	return 0;
+}
+
+static const struct of_device_id qcom_smp2p_of_match[] = {
+	{ .compatible = "qcom,smp2p" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, qcom_smp2p_of_match);
+
+static struct platform_driver qcom_smp2p_driver = {
+	.probe = qcom_smp2p_probe,
+	.remove = qcom_smp2p_remove,
+	.driver  = {
+		.name  = "qcom_smp2p",
+		.of_match_table = qcom_smp2p_of_match,
+	},
+};
+module_platform_driver(qcom_smp2p_driver);
+
+MODULE_DESCRIPTION("Qualcomm Shared Memory Point to Point driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/soc/qcom/smsm.c b/drivers/soc/qcom/smsm.c
new file mode 100644
index 000000000000..6b777af1bc19
--- /dev/null
+++ b/drivers/soc/qcom/smsm.c
@@ -0,0 +1,625 @@
+/*
+ * Copyright (c) 2015, Sony Mobile Communications Inc.
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/regmap.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+
+/*
+ * This driver implements the Qualcomm Shared Memory State Machine, a mechanism
+ * for communicating single bit state information to remote processors.
+ *
+ * The implementation is based on two sections of shared memory; the first
+ * holding the state bits and the second holding a matrix of subscription bits.
+ *
+ * The state bits are structured in entries of 32 bits, each belonging to one
+ * system in the SoC. The entry belonging to the local system is considered
+ * read-write, while the rest should be considered read-only.
+ *
+ * The subscription matrix consists of N bitmaps per entry, denoting interest
+ * in updates of the entry for each of the N hosts. Upon updating a state bit
+ * each host's subscription bitmap should be queried and the remote system
+ * should be interrupted if they request so.
+ *
+ * The subscription matrix is laid out in entry-major order:
+ * entry0: [host0 ... hostN]
+ *	.
+ *	.
+ * entryM: [host0 ... hostN]
+ *
+ * A third, optional, shared memory region might contain information regarding
+ * the number of entries in the state bitmap as well as number of columns in
+ * the subscription matrix.
+ */
+
+/*
+ * Shared memory identifiers, used to acquire handles to respective memory
+ * region.
+ */
+#define SMEM_SMSM_SHARED_STATE		85
+#define SMEM_SMSM_CPU_INTR_MASK		333
+#define SMEM_SMSM_SIZE_INFO		419
+
+/*
+ * Default sizes, in case SMEM_SMSM_SIZE_INFO is not found.
+ */
+#define SMSM_DEFAULT_NUM_ENTRIES	8
+#define SMSM_DEFAULT_NUM_HOSTS		3
+
+struct smsm_entry;
+struct smsm_host;
+
+/**
+ * struct qcom_smsm - smsm driver context
+ * @dev:	smsm device pointer
+ * @local_host:	column in the subscription matrix representing this system
+ * @num_hosts:	number of columns in the subscription matrix
+ * @num_entries: number of entries in the state map and rows in the subscription
+ *		matrix
+ * @local_state: pointer to the local processor's state bits
+ * @subscription: pointer to local processor's row in subscription matrix
+ * @state:	smem state handle
+ * @lock:	spinlock for read-modify-write of the outgoing state
+ * @entries:	context for each of the entries
+ * @hosts:	context for each of the hosts
+ */
+struct qcom_smsm {
+	struct device *dev;
+
+	u32 local_host;
+
+	u32 num_hosts;
+	u32 num_entries;
+
+	u32 *local_state;
+	u32 *subscription;
+	struct qcom_smem_state *state;
+
+	spinlock_t lock;
+
+	struct smsm_entry *entries;
+	struct smsm_host *hosts;
+};
+
+/**
+ * struct smsm_entry - per remote processor entry context
+ * @smsm:	back-reference to driver context
+ * @domain:	IRQ domain for this entry, if representing a remote system
+ * @irq_enabled: bitmap of which state bits IRQs are enabled
+ * @irq_rising:	bitmap tracking if rising bits should be propagated
+ * @irq_falling: bitmap tracking if falling bits should be propagated
+ * @last_value:	snapshot of state bits last time the interrupts where propagated
+ * @remote_state: pointer to this entry's state bits
+ * @subscription: pointer to a row in the subscription matrix representing this
+ *		entry
+ */
+struct smsm_entry {
+	struct qcom_smsm *smsm;
+
+	struct irq_domain *domain;
+	DECLARE_BITMAP(irq_enabled, 32);
+	DECLARE_BITMAP(irq_rising, 32);
+	DECLARE_BITMAP(irq_falling, 32);
+	u32 last_value;
+
+	u32 *remote_state;
+	u32 *subscription;
+};
+
+/**
+ * struct smsm_host - representation of a remote host
+ * @ipc_regmap:	regmap for outgoing interrupt
+ * @ipc_offset:	offset in @ipc_regmap for outgoing interrupt
+ * @ipc_bit:	bit in @ipc_regmap + @ipc_offset for outgoing interrupt
+ */
+struct smsm_host {
+	struct regmap *ipc_regmap;
+	int ipc_offset;
+	int ipc_bit;
+};
+
+/**
+ * smsm_update_bits() - change bit in outgoing entry and inform subscribers
+ * @data:	smsm context pointer
+ * @offset:	bit in the entry
+ * @value:	new value
+ *
+ * Used to set and clear the bits in the outgoing/local entry and inform
+ * subscribers about the change.
+ */
+static int smsm_update_bits(void *data, u32 mask, u32 value)
+{
+	struct qcom_smsm *smsm = data;
+	struct smsm_host *hostp;
+	unsigned long flags;
+	u32 changes;
+	u32 host;
+	u32 orig;
+	u32 val;
+
+	spin_lock_irqsave(&smsm->lock, flags);
+
+	/* Update the entry */
+	val = orig = readl(smsm->local_state);
+	val &= ~mask;
+	val |= value;
+
+	/* Don't signal if we didn't change the value */
+	changes = val ^ orig;
+	if (!changes) {
+		spin_unlock_irqrestore(&smsm->lock, flags);
+		goto done;
+	}
+
+	/* Write out the new value */
+	writel(val, smsm->local_state);
+	spin_unlock_irqrestore(&smsm->lock, flags);
+
+	/* Make sure the value update is ordered before any kicks */
+	wmb();
+
+	/* Iterate over all hosts to check whom wants a kick */
+	for (host = 0; host < smsm->num_hosts; host++) {
+		hostp = &smsm->hosts[host];
+
+		val = readl(smsm->subscription + host);
+		if (val & changes && hostp->ipc_regmap) {
+			regmap_write(hostp->ipc_regmap,
+				     hostp->ipc_offset,
+				     BIT(hostp->ipc_bit));
+		}
+	}
+
+done:
+	return 0;
+}
+
+static const struct qcom_smem_state_ops smsm_state_ops = {
+	.update_bits = smsm_update_bits,
+};
+
+/**
+ * smsm_intr() - cascading IRQ handler for SMSM
+ * @irq:	unused
+ * @data:	entry related to this IRQ
+ *
+ * This function cascades an incoming interrupt from a remote system, based on
+ * the state bits and configuration.
+ */
+static irqreturn_t smsm_intr(int irq, void *data)
+{
+	struct smsm_entry *entry = data;
+	unsigned i;
+	int irq_pin;
+	u32 changed;
+	u32 val;
+
+	val = readl(entry->remote_state);
+	changed = val ^ entry->last_value;
+	entry->last_value = val;
+
+	for_each_set_bit(i, entry->irq_enabled, 32) {
+		if (!(changed & BIT(i)))
+			continue;
+
+		if (val & BIT(i)) {
+			if (test_bit(i, entry->irq_rising)) {
+				irq_pin = irq_find_mapping(entry->domain, i);
+				handle_nested_irq(irq_pin);
+			}
+		} else {
+			if (test_bit(i, entry->irq_falling)) {
+				irq_pin = irq_find_mapping(entry->domain, i);
+				handle_nested_irq(irq_pin);
+			}
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * smsm_mask_irq() - un-subscribe from cascades of IRQs of a certain staus bit
+ * @irqd:	IRQ handle to be masked
+ *
+ * This un-subscribes the local CPU from interrupts upon changes to the defines
+ * status bit. The bit is also cleared from cascading.
+ */
+static void smsm_mask_irq(struct irq_data *irqd)
+{
+	struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd);
+	irq_hw_number_t irq = irqd_to_hwirq(irqd);
+	struct qcom_smsm *smsm = entry->smsm;
+	u32 val;
+
+	if (entry->subscription) {
+		val = readl(entry->subscription + smsm->local_host);
+		val &= ~BIT(irq);
+		writel(val, entry->subscription + smsm->local_host);
+	}
+
+	clear_bit(irq, entry->irq_enabled);
+}
+
+/**
+ * smsm_unmask_irq() - subscribe to cascades of IRQs of a certain status bit
+ * @irqd:	IRQ handle to be unmasked
+ *
+
+ * This subscribes the local CPU to interrupts upon changes to the defined
+ * status bit. The bit is also marked for cascading.
+
+ */
+static void smsm_unmask_irq(struct irq_data *irqd)
+{
+	struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd);
+	irq_hw_number_t irq = irqd_to_hwirq(irqd);
+	struct qcom_smsm *smsm = entry->smsm;
+	u32 val;
+
+	set_bit(irq, entry->irq_enabled);
+
+	if (entry->subscription) {
+		val = readl(entry->subscription + smsm->local_host);
+		val |= BIT(irq);
+		writel(val, entry->subscription + smsm->local_host);
+	}
+}
+
+/**
+ * smsm_set_irq_type() - updates the requested IRQ type for the cascading
+ * @irqd:	consumer interrupt handle
+ * @type:	requested flags
+ */
+static int smsm_set_irq_type(struct irq_data *irqd, unsigned int type)
+{
+	struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd);
+	irq_hw_number_t irq = irqd_to_hwirq(irqd);
+
+	if (!(type & IRQ_TYPE_EDGE_BOTH))
+		return -EINVAL;
+
+	if (type & IRQ_TYPE_EDGE_RISING)
+		set_bit(irq, entry->irq_rising);
+	else
+		clear_bit(irq, entry->irq_rising);
+
+	if (type & IRQ_TYPE_EDGE_FALLING)
+		set_bit(irq, entry->irq_falling);
+	else
+		clear_bit(irq, entry->irq_falling);
+
+	return 0;
+}
+
+static struct irq_chip smsm_irq_chip = {
+	.name           = "smsm",
+	.irq_mask       = smsm_mask_irq,
+	.irq_unmask     = smsm_unmask_irq,
+	.irq_set_type	= smsm_set_irq_type,
+};
+
+/**
+ * smsm_irq_map() - sets up a mapping for a cascaded IRQ
+ * @d:		IRQ domain representing an entry
+ * @irq:	IRQ to set up
+ * @hw:		unused
+ */
+static int smsm_irq_map(struct irq_domain *d,
+			unsigned int irq,
+			irq_hw_number_t hw)
+{
+	struct smsm_entry *entry = d->host_data;
+
+	irq_set_chip_and_handler(irq, &smsm_irq_chip, handle_level_irq);
+	irq_set_chip_data(irq, entry);
+	irq_set_nested_thread(irq, 1);
+
+	return 0;
+}
+
+static const struct irq_domain_ops smsm_irq_ops = {
+	.map = smsm_irq_map,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+/**
+ * smsm_parse_ipc() - parses a qcom,ipc-%d device tree property
+ * @smsm:	smsm driver context
+ * @host_id:	index of the remote host to be resolved
+ *
+ * Parses device tree to acquire the information needed for sending the
+ * outgoing interrupts to a remote host - identified by @host_id.
+ */
+static int smsm_parse_ipc(struct qcom_smsm *smsm, unsigned host_id)
+{
+	struct device_node *syscon;
+	struct device_node *node = smsm->dev->of_node;
+	struct smsm_host *host = &smsm->hosts[host_id];
+	char key[16];
+	int ret;
+
+	snprintf(key, sizeof(key), "qcom,ipc-%d", host_id);
+	syscon = of_parse_phandle(node, key, 0);
+	if (!syscon)
+		return 0;
+
+	host->ipc_regmap = syscon_node_to_regmap(syscon);
+	if (IS_ERR(host->ipc_regmap))
+		return PTR_ERR(host->ipc_regmap);
+
+	ret = of_property_read_u32_index(node, key, 1, &host->ipc_offset);
+	if (ret < 0) {
+		dev_err(smsm->dev, "no offset in %s\n", key);
+		return -EINVAL;
+	}
+
+	ret = of_property_read_u32_index(node, key, 2, &host->ipc_bit);
+	if (ret < 0) {
+		dev_err(smsm->dev, "no bit in %s\n", key);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * smsm_inbound_entry() - parse DT and set up an entry representing a remote system
+ * @smsm:	smsm driver context
+ * @entry:	entry context to be set up
+ * @node:	dt node containing the entry's properties
+ */
+static int smsm_inbound_entry(struct qcom_smsm *smsm,
+			      struct smsm_entry *entry,
+			      struct device_node *node)
+{
+	int ret;
+	int irq;
+
+	irq = irq_of_parse_and_map(node, 0);
+	if (!irq) {
+		dev_err(smsm->dev, "failed to parse smsm interrupt\n");
+		return -EINVAL;
+	}
+
+	ret = devm_request_threaded_irq(smsm->dev, irq,
+					NULL, smsm_intr,
+					IRQF_ONESHOT,
+					"smsm", (void *)entry);
+	if (ret) {
+		dev_err(smsm->dev, "failed to request interrupt\n");
+		return ret;
+	}
+
+	entry->domain = irq_domain_add_linear(node, 32, &smsm_irq_ops, entry);
+	if (!entry->domain) {
+		dev_err(smsm->dev, "failed to add irq_domain\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+/**
+ * smsm_get_size_info() - parse the optional memory segment for sizes
+ * @smsm:	smsm driver context
+ *
+ * Attempt to acquire the number of hosts and entries from the optional shared
+ * memory location. Not being able to find this segment should indicate that
+ * we're on a older system where these values was hard coded to
+ * SMSM_DEFAULT_NUM_ENTRIES and SMSM_DEFAULT_NUM_HOSTS.
+ *
+ * Returns 0 on success, negative errno on failure.
+ */
+static int smsm_get_size_info(struct qcom_smsm *smsm)
+{
+	size_t size;
+	struct {
+		u32 num_hosts;
+		u32 num_entries;
+		u32 reserved0;
+		u32 reserved1;
+	} *info;
+
+	info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_SMSM_SIZE_INFO, &size);
+	if (PTR_ERR(info) == -ENOENT || size != sizeof(*info)) {
+		dev_warn(smsm->dev, "no smsm size info, using defaults\n");
+		smsm->num_entries = SMSM_DEFAULT_NUM_ENTRIES;
+		smsm->num_hosts = SMSM_DEFAULT_NUM_HOSTS;
+		return 0;
+	} else if (IS_ERR(info)) {
+		dev_err(smsm->dev, "unable to retrieve smsm size info\n");
+		return PTR_ERR(info);
+	}
+
+	smsm->num_entries = info->num_entries;
+	smsm->num_hosts = info->num_hosts;
+
+	dev_dbg(smsm->dev,
+		"found custom size of smsm: %d entries %d hosts\n",
+		smsm->num_entries, smsm->num_hosts);
+
+	return 0;
+}
+
+static int qcom_smsm_probe(struct platform_device *pdev)
+{
+	struct device_node *local_node;
+	struct device_node *node;
+	struct smsm_entry *entry;
+	struct qcom_smsm *smsm;
+	u32 *intr_mask;
+	size_t size;
+	u32 *states;
+	u32 id;
+	int ret;
+
+	smsm = devm_kzalloc(&pdev->dev, sizeof(*smsm), GFP_KERNEL);
+	if (!smsm)
+		return -ENOMEM;
+	smsm->dev = &pdev->dev;
+	spin_lock_init(&smsm->lock);
+
+	ret = smsm_get_size_info(smsm);
+	if (ret)
+		return ret;
+
+	smsm->entries = devm_kcalloc(&pdev->dev,
+				     smsm->num_entries,
+				     sizeof(struct smsm_entry),
+				     GFP_KERNEL);
+	if (!smsm->entries)
+		return -ENOMEM;
+
+	smsm->hosts = devm_kcalloc(&pdev->dev,
+				   smsm->num_hosts,
+				   sizeof(struct smsm_host),
+				   GFP_KERNEL);
+	if (!smsm->hosts)
+		return -ENOMEM;
+
+	local_node = of_find_node_with_property(pdev->dev.of_node, "#qcom,state-cells");
+	if (!local_node) {
+		dev_err(&pdev->dev, "no state entry\n");
+		return -EINVAL;
+	}
+
+	of_property_read_u32(pdev->dev.of_node,
+			     "qcom,local-host",
+			     &smsm->local_host);
+
+	/* Parse the host properties */
+	for (id = 0; id < smsm->num_hosts; id++) {
+		ret = smsm_parse_ipc(smsm, id);
+		if (ret < 0)
+			return ret;
+	}
+
+	/* Acquire the main SMSM state vector */
+	ret = qcom_smem_alloc(QCOM_SMEM_HOST_ANY, SMEM_SMSM_SHARED_STATE,
+			      smsm->num_entries * sizeof(u32));
+	if (ret < 0 && ret != -EEXIST) {
+		dev_err(&pdev->dev, "unable to allocate shared state entry\n");
+		return ret;
+	}
+
+	states = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_SMSM_SHARED_STATE, NULL);
+	if (IS_ERR(states)) {
+		dev_err(&pdev->dev, "Unable to acquire shared state entry\n");
+		return PTR_ERR(states);
+	}
+
+	/* Acquire the list of interrupt mask vectors */
+	size = smsm->num_entries * smsm->num_hosts * sizeof(u32);
+	ret = qcom_smem_alloc(QCOM_SMEM_HOST_ANY, SMEM_SMSM_CPU_INTR_MASK, size);
+	if (ret < 0 && ret != -EEXIST) {
+		dev_err(&pdev->dev, "unable to allocate smsm interrupt mask\n");
+		return ret;
+	}
+
+	intr_mask = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_SMSM_CPU_INTR_MASK, NULL);
+	if (IS_ERR(intr_mask)) {
+		dev_err(&pdev->dev, "unable to acquire shared memory interrupt mask\n");
+		return PTR_ERR(intr_mask);
+	}
+
+	/* Setup the reference to the local state bits */
+	smsm->local_state = states + smsm->local_host;
+	smsm->subscription = intr_mask + smsm->local_host * smsm->num_hosts;
+
+	/* Register the outgoing state */
+	smsm->state = qcom_smem_state_register(local_node, &smsm_state_ops, smsm);
+	if (IS_ERR(smsm->state)) {
+		dev_err(smsm->dev, "failed to register qcom_smem_state\n");
+		return PTR_ERR(smsm->state);
+	}
+
+	/* Register handlers for remote processor entries of interest. */
+	for_each_available_child_of_node(pdev->dev.of_node, node) {
+		if (!of_property_read_bool(node, "interrupt-controller"))
+			continue;
+
+		ret = of_property_read_u32(node, "reg", &id);
+		if (ret || id >= smsm->num_entries) {
+			dev_err(&pdev->dev, "invalid reg of entry\n");
+			if (!ret)
+				ret = -EINVAL;
+			goto unwind_interfaces;
+		}
+		entry = &smsm->entries[id];
+
+		entry->smsm = smsm;
+		entry->remote_state = states + id;
+
+		/* Setup subscription pointers and unsubscribe to any kicks */
+		entry->subscription = intr_mask + id * smsm->num_hosts;
+		writel(0, entry->subscription + smsm->local_host);
+
+		ret = smsm_inbound_entry(smsm, entry, node);
+		if (ret < 0)
+			goto unwind_interfaces;
+	}
+
+	platform_set_drvdata(pdev, smsm);
+
+	return 0;
+
+unwind_interfaces:
+	for (id = 0; id < smsm->num_entries; id++)
+		if (smsm->entries[id].domain)
+			irq_domain_remove(smsm->entries[id].domain);
+
+	qcom_smem_state_unregister(smsm->state);
+
+	return ret;
+}
+
+static int qcom_smsm_remove(struct platform_device *pdev)
+{
+	struct qcom_smsm *smsm = platform_get_drvdata(pdev);
+	unsigned id;
+
+	for (id = 0; id < smsm->num_entries; id++)
+		if (smsm->entries[id].domain)
+			irq_domain_remove(smsm->entries[id].domain);
+
+	qcom_smem_state_unregister(smsm->state);
+
+	return 0;
+}
+
+static const struct of_device_id qcom_smsm_of_match[] = {
+	{ .compatible = "qcom,smsm" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, qcom_smsm_of_match);
+
+static struct platform_driver qcom_smsm_driver = {
+	.probe = qcom_smsm_probe,
+	.remove = qcom_smsm_remove,
+	.driver  = {
+		.name  = "qcom-smsm",
+		.of_match_table = qcom_smsm_of_match,
+	},
+};
+module_platform_driver(qcom_smsm_driver);
+
+MODULE_DESCRIPTION("Qualcomm Shared Memory State Machine driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/soc/qcom/wcnss_ctrl.c b/drivers/soc/qcom/wcnss_ctrl.c
new file mode 100644
index 000000000000..7a986f881d5c
--- /dev/null
+++ b/drivers/soc/qcom/wcnss_ctrl.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright (c) 2015, Sony Mobile Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/soc/qcom/smd.h>
+
+#define WCNSS_REQUEST_TIMEOUT	(5 * HZ)
+
+#define NV_FRAGMENT_SIZE	3072
+#define NVBIN_FILE		"wlan/prima/WCNSS_qcom_wlan_nv.bin"
+
+/**
+ * struct wcnss_ctrl - driver context
+ * @dev:	device handle
+ * @channel:	SMD channel handle
+ * @ack:	completion for outstanding requests
+ * @ack_status:	status of the outstanding request
+ * @download_nv_work: worker for uploading nv binary
+ */
+struct wcnss_ctrl {
+	struct device *dev;
+	struct qcom_smd_channel *channel;
+
+	struct completion ack;
+	int ack_status;
+
+	struct work_struct download_nv_work;
+};
+
+/* message types */
+enum {
+	WCNSS_VERSION_REQ = 0x01000000,
+	WCNSS_VERSION_RESP,
+	WCNSS_DOWNLOAD_NV_REQ,
+	WCNSS_DOWNLOAD_NV_RESP,
+	WCNSS_UPLOAD_CAL_REQ,
+	WCNSS_UPLOAD_CAL_RESP,
+	WCNSS_DOWNLOAD_CAL_REQ,
+	WCNSS_DOWNLOAD_CAL_RESP,
+};
+
+/**
+ * struct wcnss_msg_hdr - common packet header for requests and responses
+ * @type:	packet message type
+ * @len:	total length of the packet, including this header
+ */
+struct wcnss_msg_hdr {
+	u32 type;
+	u32 len;
+} __packed;
+
+/**
+ * struct wcnss_version_resp - version request response
+ * @hdr:	common packet wcnss_msg_hdr header
+ */
+struct wcnss_version_resp {
+	struct wcnss_msg_hdr hdr;
+	u8 major;
+	u8 minor;
+	u8 version;
+	u8 revision;
+} __packed;
+
+/**
+ * struct wcnss_download_nv_req - firmware fragment request
+ * @hdr:	common packet wcnss_msg_hdr header
+ * @seq:	sequence number of this fragment
+ * @last:	boolean indicator of this being the last fragment of the binary
+ * @frag_size:	length of this fragment
+ * @fragment:	fragment data
+ */
+struct wcnss_download_nv_req {
+	struct wcnss_msg_hdr hdr;
+	u16 seq;
+	u16 last;
+	u32 frag_size;
+	u8 fragment[];
+} __packed;
+
+/**
+ * struct wcnss_download_nv_resp - firmware download response
+ * @hdr:	common packet wcnss_msg_hdr header
+ * @status:	boolean to indicate success of the download
+ */
+struct wcnss_download_nv_resp {
+	struct wcnss_msg_hdr hdr;
+	u8 status;
+} __packed;
+
+/**
+ * wcnss_ctrl_smd_callback() - handler from SMD responses
+ * @qsdev:	smd device handle
+ * @data:	pointer to the incoming data packet
+ * @count:	size of the incoming data packet
+ *
+ * Handles any incoming packets from the remote WCNSS_CTRL service.
+ */
+static int wcnss_ctrl_smd_callback(struct qcom_smd_device *qsdev,
+				   const void *data,
+				   size_t count)
+{
+	struct wcnss_ctrl *wcnss = dev_get_drvdata(&qsdev->dev);
+	const struct wcnss_download_nv_resp *nvresp;
+	const struct wcnss_version_resp *version;
+	const struct wcnss_msg_hdr *hdr = data;
+
+	switch (hdr->type) {
+	case WCNSS_VERSION_RESP:
+		if (count != sizeof(*version)) {
+			dev_err(wcnss->dev,
+				"invalid size of version response\n");
+			break;
+		}
+
+		version = data;
+		dev_info(wcnss->dev, "WCNSS Version %d.%d %d.%d\n",
+			 version->major, version->minor,
+			 version->version, version->revision);
+
+		schedule_work(&wcnss->download_nv_work);
+		break;
+	case WCNSS_DOWNLOAD_NV_RESP:
+		if (count != sizeof(*nvresp)) {
+			dev_err(wcnss->dev,
+				"invalid size of download response\n");
+			break;
+		}
+
+		nvresp = data;
+		wcnss->ack_status = nvresp->status;
+		complete(&wcnss->ack);
+		break;
+	default:
+		dev_info(wcnss->dev, "unknown message type %d\n", hdr->type);
+		break;
+	}
+
+	return 0;
+}
+
+/**
+ * wcnss_request_version() - send a version request to WCNSS
+ * @wcnss:	wcnss ctrl driver context
+ */
+static int wcnss_request_version(struct wcnss_ctrl *wcnss)
+{
+	struct wcnss_msg_hdr msg;
+
+	msg.type = WCNSS_VERSION_REQ;
+	msg.len = sizeof(msg);
+
+	return qcom_smd_send(wcnss->channel, &msg, sizeof(msg));
+}
+
+/**
+ * wcnss_download_nv() - send nv binary to WCNSS
+ * @work:	work struct to acquire wcnss context
+ */
+static void wcnss_download_nv(struct work_struct *work)
+{
+	struct wcnss_ctrl *wcnss = container_of(work, struct wcnss_ctrl, download_nv_work);
+	struct wcnss_download_nv_req *req;
+	const struct firmware *fw;
+	const void *data;
+	ssize_t left;
+	int ret;
+
+	req = kzalloc(sizeof(*req) + NV_FRAGMENT_SIZE, GFP_KERNEL);
+	if (!req)
+		return;
+
+	ret = request_firmware(&fw, NVBIN_FILE, wcnss->dev);
+	if (ret) {
+		dev_err(wcnss->dev, "Failed to load nv file %s: %d\n",
+			NVBIN_FILE, ret);
+		goto free_req;
+	}
+
+	data = fw->data;
+	left = fw->size;
+
+	req->hdr.type = WCNSS_DOWNLOAD_NV_REQ;
+	req->hdr.len = sizeof(*req) + NV_FRAGMENT_SIZE;
+
+	req->last = 0;
+	req->frag_size = NV_FRAGMENT_SIZE;
+
+	req->seq = 0;
+	do {
+		if (left <= NV_FRAGMENT_SIZE) {
+			req->last = 1;
+			req->frag_size = left;
+			req->hdr.len = sizeof(*req) + left;
+		}
+
+		memcpy(req->fragment, data, req->frag_size);
+
+		ret = qcom_smd_send(wcnss->channel, req, req->hdr.len);
+		if (ret) {
+			dev_err(wcnss->dev, "failed to send smd packet\n");
+			goto release_fw;
+		}
+
+		/* Increment for next fragment */
+		req->seq++;
+
+		data += req->hdr.len;
+		left -= NV_FRAGMENT_SIZE;
+	} while (left > 0);
+
+	ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_REQUEST_TIMEOUT);
+	if (!ret)
+		dev_err(wcnss->dev, "timeout waiting for nv upload ack\n");
+	else if (wcnss->ack_status != 1)
+		dev_err(wcnss->dev, "nv upload response failed err: %d\n",
+			wcnss->ack_status);
+
+release_fw:
+	release_firmware(fw);
+free_req:
+	kfree(req);
+}
+
+static int wcnss_ctrl_probe(struct qcom_smd_device *sdev)
+{
+	struct wcnss_ctrl *wcnss;
+
+	wcnss = devm_kzalloc(&sdev->dev, sizeof(*wcnss), GFP_KERNEL);
+	if (!wcnss)
+		return -ENOMEM;
+
+	wcnss->dev = &sdev->dev;
+	wcnss->channel = sdev->channel;
+
+	init_completion(&wcnss->ack);
+	INIT_WORK(&wcnss->download_nv_work, wcnss_download_nv);
+
+	dev_set_drvdata(&sdev->dev, wcnss);
+
+	return wcnss_request_version(wcnss);
+}
+
+static const struct qcom_smd_id wcnss_ctrl_smd_match[] = {
+	{ .name = "WCNSS_CTRL" },
+	{}
+};
+
+static struct qcom_smd_driver wcnss_ctrl_driver = {
+	.probe = wcnss_ctrl_probe,
+	.callback = wcnss_ctrl_smd_callback,
+	.smd_match_table = wcnss_ctrl_smd_match,
+	.driver  = {
+		.name  = "qcom_wcnss_ctrl",
+		.owner = THIS_MODULE,
+	},
+};
+
+module_qcom_smd_driver(wcnss_ctrl_driver);
+
+MODULE_DESCRIPTION("Qualcomm WCNSS control driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/soc/ti/Kconfig b/drivers/soc/ti/Kconfig
index 7266b2165183..3557c5e32a93 100644
--- a/drivers/soc/ti/Kconfig
+++ b/drivers/soc/ti/Kconfig
@@ -28,4 +28,14 @@ config KEYSTONE_NAVIGATOR_DMA
 
 	  If unsure, say N.
 
+config WKUP_M3_IPC
+	tristate "TI AMx3 Wkup-M3 IPC Driver"
+	depends on WKUP_M3_RPROC
+	depends on OMAP2PLUS_MBOX
+	help
+	  TI AM33XX and AM43XX have a Cortex M3, the Wakeup M3, to handle
+	  low power transitions. This IPC driver provides the necessary API
+	  to communicate and use the Wakeup M3 for PM features like suspend
+	  resume and boots it using wkup_m3_rproc driver.
+
 endif # SOC_TI
diff --git a/drivers/soc/ti/Makefile b/drivers/soc/ti/Makefile
index 135bdad7a6de..48ff3a79634f 100644
--- a/drivers/soc/ti/Makefile
+++ b/drivers/soc/ti/Makefile
@@ -4,3 +4,4 @@
 obj-$(CONFIG_KEYSTONE_NAVIGATOR_QMSS)	+= knav_qmss.o
 knav_qmss-y := knav_qmss_queue.o knav_qmss_acc.o
 obj-$(CONFIG_KEYSTONE_NAVIGATOR_DMA)	+= knav_dma.o
+obj-$(CONFIG_WKUP_M3_IPC)		+= wkup_m3_ipc.o
diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c
new file mode 100644
index 000000000000..8823cc81ae45
--- /dev/null
+++ b/drivers/soc/ti/wkup_m3_ipc.c
@@ -0,0 +1,508 @@
+/*
+ * AMx3 Wkup M3 IPC driver
+ *
+ * Copyright (C) 2015 Texas Instruments, Inc.
+ *
+ * Dave Gerlach <d-gerlach@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/omap-mailbox.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/suspend.h>
+#include <linux/wkup_m3_ipc.h>
+
+#define AM33XX_CTRL_IPC_REG_COUNT	0x8
+#define AM33XX_CTRL_IPC_REG_OFFSET(m)	(0x4 + 4 * (m))
+
+/* AM33XX M3_TXEV_EOI register */
+#define AM33XX_CONTROL_M3_TXEV_EOI	0x00
+
+#define AM33XX_M3_TXEV_ACK		(0x1 << 0)
+#define AM33XX_M3_TXEV_ENABLE		(0x0 << 0)
+
+#define IPC_CMD_DS0			0x4
+#define IPC_CMD_STANDBY			0xc
+#define IPC_CMD_IDLE			0x10
+#define IPC_CMD_RESET			0xe
+#define DS_IPC_DEFAULT			0xffffffff
+#define M3_VERSION_UNKNOWN		0x0000ffff
+#define M3_BASELINE_VERSION		0x191
+#define M3_STATUS_RESP_MASK		(0xffff << 16)
+#define M3_FW_VERSION_MASK		0xffff
+
+#define M3_STATE_UNKNOWN		0
+#define M3_STATE_RESET			1
+#define M3_STATE_INITED			2
+#define M3_STATE_MSG_FOR_LP		3
+#define M3_STATE_MSG_FOR_RESET		4
+
+static struct wkup_m3_ipc *m3_ipc_state;
+
+static void am33xx_txev_eoi(struct wkup_m3_ipc *m3_ipc)
+{
+	writel(AM33XX_M3_TXEV_ACK,
+	       m3_ipc->ipc_mem_base + AM33XX_CONTROL_M3_TXEV_EOI);
+}
+
+static void am33xx_txev_enable(struct wkup_m3_ipc *m3_ipc)
+{
+	writel(AM33XX_M3_TXEV_ENABLE,
+	       m3_ipc->ipc_mem_base + AM33XX_CONTROL_M3_TXEV_EOI);
+}
+
+static void wkup_m3_ctrl_ipc_write(struct wkup_m3_ipc *m3_ipc,
+				   u32 val, int ipc_reg_num)
+{
+	if (WARN(ipc_reg_num < 0 || ipc_reg_num > AM33XX_CTRL_IPC_REG_COUNT,
+		 "ipc register operation out of range"))
+		return;
+
+	writel(val, m3_ipc->ipc_mem_base +
+	       AM33XX_CTRL_IPC_REG_OFFSET(ipc_reg_num));
+}
+
+static unsigned int wkup_m3_ctrl_ipc_read(struct wkup_m3_ipc *m3_ipc,
+					  int ipc_reg_num)
+{
+	if (WARN(ipc_reg_num < 0 || ipc_reg_num > AM33XX_CTRL_IPC_REG_COUNT,
+		 "ipc register operation out of range"))
+		return 0;
+
+	return readl(m3_ipc->ipc_mem_base +
+		     AM33XX_CTRL_IPC_REG_OFFSET(ipc_reg_num));
+}
+
+static int wkup_m3_fw_version_read(struct wkup_m3_ipc *m3_ipc)
+{
+	int val;
+
+	val = wkup_m3_ctrl_ipc_read(m3_ipc, 2);
+
+	return val & M3_FW_VERSION_MASK;
+}
+
+static irqreturn_t wkup_m3_txev_handler(int irq, void *ipc_data)
+{
+	struct wkup_m3_ipc *m3_ipc = ipc_data;
+	struct device *dev = m3_ipc->dev;
+	int ver = 0;
+
+	am33xx_txev_eoi(m3_ipc);
+
+	switch (m3_ipc->state) {
+	case M3_STATE_RESET:
+		ver = wkup_m3_fw_version_read(m3_ipc);
+
+		if (ver == M3_VERSION_UNKNOWN ||
+		    ver < M3_BASELINE_VERSION) {
+			dev_warn(dev, "CM3 Firmware Version %x not supported\n",
+				 ver);
+		} else {
+			dev_info(dev, "CM3 Firmware Version = 0x%x\n", ver);
+		}
+
+		m3_ipc->state = M3_STATE_INITED;
+		complete(&m3_ipc->sync_complete);
+		break;
+	case M3_STATE_MSG_FOR_RESET:
+		m3_ipc->state = M3_STATE_INITED;
+		complete(&m3_ipc->sync_complete);
+		break;
+	case M3_STATE_MSG_FOR_LP:
+		complete(&m3_ipc->sync_complete);
+		break;
+	case M3_STATE_UNKNOWN:
+		dev_warn(dev, "Unknown CM3 State\n");
+	}
+
+	am33xx_txev_enable(m3_ipc);
+
+	return IRQ_HANDLED;
+}
+
+static int wkup_m3_ping(struct wkup_m3_ipc *m3_ipc)
+{
+	struct device *dev = m3_ipc->dev;
+	mbox_msg_t dummy_msg = 0;
+	int ret;
+
+	if (!m3_ipc->mbox) {
+		dev_err(dev,
+			"No IPC channel to communicate with wkup_m3!\n");
+		return -EIO;
+	}
+
+	/*
+	 * Write a dummy message to the mailbox in order to trigger the RX
+	 * interrupt to alert the M3 that data is available in the IPC
+	 * registers. We must enable the IRQ here and disable it after in
+	 * the RX callback to avoid multiple interrupts being received
+	 * by the CM3.
+	 */
+	ret = mbox_send_message(m3_ipc->mbox, &dummy_msg);
+	if (ret < 0) {
+		dev_err(dev, "%s: mbox_send_message() failed: %d\n",
+			__func__, ret);
+		return ret;
+	}
+
+	ret = wait_for_completion_timeout(&m3_ipc->sync_complete,
+					  msecs_to_jiffies(500));
+	if (!ret) {
+		dev_err(dev, "MPU<->CM3 sync failure\n");
+		m3_ipc->state = M3_STATE_UNKNOWN;
+		return -EIO;
+	}
+
+	mbox_client_txdone(m3_ipc->mbox, 0);
+	return 0;
+}
+
+static int wkup_m3_ping_noirq(struct wkup_m3_ipc *m3_ipc)
+{
+	struct device *dev = m3_ipc->dev;
+	mbox_msg_t dummy_msg = 0;
+	int ret;
+
+	if (!m3_ipc->mbox) {
+		dev_err(dev,
+			"No IPC channel to communicate with wkup_m3!\n");
+		return -EIO;
+	}
+
+	ret = mbox_send_message(m3_ipc->mbox, &dummy_msg);
+	if (ret < 0) {
+		dev_err(dev, "%s: mbox_send_message() failed: %d\n",
+			__func__, ret);
+		return ret;
+	}
+
+	mbox_client_txdone(m3_ipc->mbox, 0);
+	return 0;
+}
+
+static int wkup_m3_is_available(struct wkup_m3_ipc *m3_ipc)
+{
+	return ((m3_ipc->state != M3_STATE_RESET) &&
+		(m3_ipc->state != M3_STATE_UNKNOWN));
+}
+
+/* Public functions */
+/**
+ * wkup_m3_set_mem_type - Pass wkup_m3 which type of memory is in use
+ * @mem_type: memory type value read directly from emif
+ *
+ * wkup_m3 must know what memory type is in use to properly suspend
+ * and resume.
+ */
+static void wkup_m3_set_mem_type(struct wkup_m3_ipc *m3_ipc, int mem_type)
+{
+	m3_ipc->mem_type = mem_type;
+}
+
+/**
+ * wkup_m3_set_resume_address - Pass wkup_m3 resume address
+ * @addr: Physical address from which resume code should execute
+ */
+static void wkup_m3_set_resume_address(struct wkup_m3_ipc *m3_ipc, void *addr)
+{
+	m3_ipc->resume_addr = (unsigned long)addr;
+}
+
+/**
+ * wkup_m3_request_pm_status - Retrieve wkup_m3 status code after suspend
+ *
+ * Returns code representing the status of a low power mode transition.
+ *	0 - Successful transition
+ *	1 - Failure to transition to low power state
+ */
+static int wkup_m3_request_pm_status(struct wkup_m3_ipc *m3_ipc)
+{
+	unsigned int i;
+	int val;
+
+	val = wkup_m3_ctrl_ipc_read(m3_ipc, 1);
+
+	i = M3_STATUS_RESP_MASK & val;
+	i >>= __ffs(M3_STATUS_RESP_MASK);
+
+	return i;
+}
+
+/**
+ * wkup_m3_prepare_low_power - Request preparation for transition to
+ *			       low power state
+ * @state: A kernel suspend state to enter, either MEM or STANDBY
+ *
+ * Returns 0 if preparation was successful, otherwise returns error code
+ */
+static int wkup_m3_prepare_low_power(struct wkup_m3_ipc *m3_ipc, int state)
+{
+	struct device *dev = m3_ipc->dev;
+	int m3_power_state;
+	int ret = 0;
+
+	if (!wkup_m3_is_available(m3_ipc))
+		return -ENODEV;
+
+	switch (state) {
+	case WKUP_M3_DEEPSLEEP:
+		m3_power_state = IPC_CMD_DS0;
+		break;
+	case WKUP_M3_STANDBY:
+		m3_power_state = IPC_CMD_STANDBY;
+		break;
+	case WKUP_M3_IDLE:
+		m3_power_state = IPC_CMD_IDLE;
+		break;
+	default:
+		return 1;
+	}
+
+	/* Program each required IPC register then write defaults to others */
+	wkup_m3_ctrl_ipc_write(m3_ipc, m3_ipc->resume_addr, 0);
+	wkup_m3_ctrl_ipc_write(m3_ipc, m3_power_state, 1);
+	wkup_m3_ctrl_ipc_write(m3_ipc, m3_ipc->mem_type, 4);
+
+	wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 2);
+	wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 3);
+	wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 5);
+	wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 6);
+	wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 7);
+
+	m3_ipc->state = M3_STATE_MSG_FOR_LP;
+
+	if (state == WKUP_M3_IDLE)
+		ret = wkup_m3_ping_noirq(m3_ipc);
+	else
+		ret = wkup_m3_ping(m3_ipc);
+
+	if (ret) {
+		dev_err(dev, "Unable to ping CM3\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * wkup_m3_finish_low_power - Return m3 to reset state
+ *
+ * Returns 0 if reset was successful, otherwise returns error code
+ */
+static int wkup_m3_finish_low_power(struct wkup_m3_ipc *m3_ipc)
+{
+	struct device *dev = m3_ipc->dev;
+	int ret = 0;
+
+	if (!wkup_m3_is_available(m3_ipc))
+		return -ENODEV;
+
+	wkup_m3_ctrl_ipc_write(m3_ipc, IPC_CMD_RESET, 1);
+	wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 2);
+
+	m3_ipc->state = M3_STATE_MSG_FOR_RESET;
+
+	ret = wkup_m3_ping(m3_ipc);
+	if (ret) {
+		dev_err(dev, "Unable to ping CM3\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct wkup_m3_ipc_ops ipc_ops = {
+	.set_mem_type = wkup_m3_set_mem_type,
+	.set_resume_address = wkup_m3_set_resume_address,
+	.prepare_low_power = wkup_m3_prepare_low_power,
+	.finish_low_power = wkup_m3_finish_low_power,
+	.request_pm_status = wkup_m3_request_pm_status,
+};
+
+/**
+ * wkup_m3_ipc_get - Return handle to wkup_m3_ipc
+ *
+ * Returns NULL if the wkup_m3 is not yet available, otherwise returns
+ * pointer to wkup_m3_ipc struct.
+ */
+struct wkup_m3_ipc *wkup_m3_ipc_get(void)
+{
+	if (m3_ipc_state)
+		get_device(m3_ipc_state->dev);
+	else
+		return NULL;
+
+	return m3_ipc_state;
+}
+EXPORT_SYMBOL_GPL(wkup_m3_ipc_get);
+
+/**
+ * wkup_m3_ipc_put - Free handle to wkup_m3_ipc returned from wkup_m3_ipc_get
+ * @m3_ipc: A pointer to wkup_m3_ipc struct returned by wkup_m3_ipc_get
+ */
+void wkup_m3_ipc_put(struct wkup_m3_ipc *m3_ipc)
+{
+	if (m3_ipc_state)
+		put_device(m3_ipc_state->dev);
+}
+EXPORT_SYMBOL_GPL(wkup_m3_ipc_put);
+
+static void wkup_m3_rproc_boot_thread(struct wkup_m3_ipc *m3_ipc)
+{
+	struct device *dev = m3_ipc->dev;
+	int ret;
+
+	wait_for_completion(&m3_ipc->rproc->firmware_loading_complete);
+
+	init_completion(&m3_ipc->sync_complete);
+
+	ret = rproc_boot(m3_ipc->rproc);
+	if (ret)
+		dev_err(dev, "rproc_boot failed\n");
+
+	do_exit(0);
+}
+
+static int wkup_m3_ipc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	int irq, ret;
+	phandle rproc_phandle;
+	struct rproc *m3_rproc;
+	struct resource *res;
+	struct task_struct *task;
+	struct wkup_m3_ipc *m3_ipc;
+
+	m3_ipc = devm_kzalloc(dev, sizeof(*m3_ipc), GFP_KERNEL);
+	if (!m3_ipc)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	m3_ipc->ipc_mem_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(m3_ipc->ipc_mem_base)) {
+		dev_err(dev, "could not ioremap ipc_mem\n");
+		return PTR_ERR(m3_ipc->ipc_mem_base);
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (!irq) {
+		dev_err(&pdev->dev, "no irq resource\n");
+		return -ENXIO;
+	}
+
+	ret = devm_request_irq(dev, irq, wkup_m3_txev_handler,
+			       0, "wkup_m3_txev", m3_ipc);
+	if (ret) {
+		dev_err(dev, "request_irq failed\n");
+		return ret;
+	}
+
+	m3_ipc->mbox_client.dev = dev;
+	m3_ipc->mbox_client.tx_done = NULL;
+	m3_ipc->mbox_client.tx_prepare = NULL;
+	m3_ipc->mbox_client.rx_callback = NULL;
+	m3_ipc->mbox_client.tx_block = false;
+	m3_ipc->mbox_client.knows_txdone = false;
+
+	m3_ipc->mbox = mbox_request_channel(&m3_ipc->mbox_client, 0);
+
+	if (IS_ERR(m3_ipc->mbox)) {
+		dev_err(dev, "IPC Request for A8->M3 Channel failed! %ld\n",
+			PTR_ERR(m3_ipc->mbox));
+		return PTR_ERR(m3_ipc->mbox);
+	}
+
+	if (of_property_read_u32(dev->of_node, "ti,rproc", &rproc_phandle)) {
+		dev_err(&pdev->dev, "could not get rproc phandle\n");
+		ret = -ENODEV;
+		goto err_free_mbox;
+	}
+
+	m3_rproc = rproc_get_by_phandle(rproc_phandle);
+	if (!m3_rproc) {
+		dev_err(&pdev->dev, "could not get rproc handle\n");
+		ret = -EPROBE_DEFER;
+		goto err_free_mbox;
+	}
+
+	m3_ipc->rproc = m3_rproc;
+	m3_ipc->dev = dev;
+	m3_ipc->state = M3_STATE_RESET;
+
+	m3_ipc->ops = &ipc_ops;
+
+	/*
+	 * Wait for firmware loading completion in a thread so we
+	 * can boot the wkup_m3 as soon as it's ready without holding
+	 * up kernel boot
+	 */
+	task = kthread_run((void *)wkup_m3_rproc_boot_thread, m3_ipc,
+			   "wkup_m3_rproc_loader");
+
+	if (IS_ERR(task)) {
+		dev_err(dev, "can't create rproc_boot thread\n");
+		goto err_put_rproc;
+	}
+
+	m3_ipc_state = m3_ipc;
+
+	return 0;
+
+err_put_rproc:
+	rproc_put(m3_rproc);
+err_free_mbox:
+	mbox_free_channel(m3_ipc->mbox);
+	return ret;
+}
+
+static int wkup_m3_ipc_remove(struct platform_device *pdev)
+{
+	mbox_free_channel(m3_ipc_state->mbox);
+
+	rproc_shutdown(m3_ipc_state->rproc);
+	rproc_put(m3_ipc_state->rproc);
+
+	m3_ipc_state = NULL;
+
+	return 0;
+}
+
+static const struct of_device_id wkup_m3_ipc_of_match[] = {
+	{ .compatible = "ti,am3352-wkup-m3-ipc", },
+	{ .compatible = "ti,am4372-wkup-m3-ipc", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, wkup_m3_ipc_of_match);
+
+static struct platform_driver wkup_m3_ipc_driver = {
+	.probe = wkup_m3_ipc_probe,
+	.remove = wkup_m3_ipc_remove,
+	.driver = {
+		.name = "wkup_m3_ipc",
+		.of_match_table = wkup_m3_ipc_of_match,
+	},
+};
+
+module_platform_driver(wkup_m3_ipc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("wkup m3 remote processor ipc driver");
+MODULE_AUTHOR("Dave Gerlach <d-gerlach@ti.com>");