Merge tag 'imx-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/drivers

i.MX drivers update for 5.18:

- Drop LS1021A device check from soc-imx driver as it's unneeded since
  commit commit 4ebd29f91629 ("soc: imx: Register SoC device only on
  i.MX boards").
- Add support for power domains provided by the VPU blk-ctrl on the
  i.MX8MQ.
- Add resource owner management API which will be used to check whether
  M4 is under control of Linux.
- Add VPU MU resources support into SCU power domain driver.
- Support DT overlay for WEIM bus driver with OF reconfiguration
  notifier handler.

* tag 'imx-drivers-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  bus: imx-weim: add DT overlay support for WEIM bus
  firmware: imx: scu-pd: imx8q: add vpu mu resources
  firmware: imx: add get resource owner api
  soc: imx: imx8m-blk-ctrl: add i.MX8MQ VPU blk-ctrl
  dt-bindings: power: imx8mq: add defines for VPU blk-ctrl domains
  soc: imx: Remove Layerscape check

Link: https://lore.kernel.org/r/20220222075226.160187-1-shawnguo@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

2 files changed, 66 insertions, 3 deletions

diff --git a/drivers/soc/imx/imx8m-blk-ctrl.c b/drivers/soc/imx/imx8m-blk-ctrl.c
index 511e74f0db8a..122f9c884b38 100644
--- a/drivers/soc/imx/imx8m-blk-ctrl.c
+++ b/drivers/soc/imx/imx8m-blk-ctrl.c
@@ -15,6 +15,7 @@
 
 #include <dt-bindings/power/imx8mm-power.h>
 #include <dt-bindings/power/imx8mn-power.h>
+#include <dt-bindings/power/imx8mq-power.h>
 
 #define BLK_SFT_RSTN	0x0
 #define BLK_CLK_EN	0x4
@@ -589,6 +590,68 @@ static const struct imx8m_blk_ctrl_data imx8mn_disp_blk_ctl_dev_data = {
 	.num_domains = ARRAY_SIZE(imx8mn_disp_blk_ctl_domain_data),
 };
 
+static int imx8mq_vpu_power_notifier(struct notifier_block *nb,
+				     unsigned long action, void *data)
+{
+	struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
+						 power_nb);
+
+	if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
+		return NOTIFY_OK;
+
+	/*
+	 * The ADB in the VPUMIX domain has no separate reset and clock
+	 * enable bits, but is ungated and reset together with the VPUs. The
+	 * reset and clock enable inputs to the ADB is a logical OR of the
+	 * VPU bits. In order to set the G2 fuse bits, the G2 clock must
+	 * also be enabled.
+	 */
+	regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(0) | BIT(1));
+	regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0) | BIT(1));
+
+	if (action == GENPD_NOTIFY_ON) {
+		/*
+		 * On power up we have no software backchannel to the GPC to
+		 * wait for the ADB handshake to happen, so we just delay for a
+		 * bit. On power down the GPC driver waits for the handshake.
+		 */
+		udelay(5);
+
+		/* set "fuse" bits to enable the VPUs */
+		regmap_set_bits(bc->regmap, 0x8, 0xffffffff);
+		regmap_set_bits(bc->regmap, 0xc, 0xffffffff);
+		regmap_set_bits(bc->regmap, 0x10, 0xffffffff);
+	}
+
+	return NOTIFY_OK;
+}
+
+static const struct imx8m_blk_ctrl_domain_data imx8mq_vpu_blk_ctl_domain_data[] = {
+	[IMX8MQ_VPUBLK_PD_G1] = {
+		.name = "vpublk-g1",
+		.clk_names = (const char *[]){ "g1", },
+		.num_clks = 1,
+		.gpc_name = "g1",
+		.rst_mask = BIT(1),
+		.clk_mask = BIT(1),
+	},
+	[IMX8MQ_VPUBLK_PD_G2] = {
+		.name = "vpublk-g2",
+		.clk_names = (const char *[]){ "g2", },
+		.num_clks = 1,
+		.gpc_name = "g2",
+		.rst_mask = BIT(0),
+		.clk_mask = BIT(0),
+	},
+};
+
+static const struct imx8m_blk_ctrl_data imx8mq_vpu_blk_ctl_dev_data = {
+	.max_reg = 0x14,
+	.power_notifier_fn = imx8mq_vpu_power_notifier,
+	.domains = imx8mq_vpu_blk_ctl_domain_data,
+	.num_domains = ARRAY_SIZE(imx8mq_vpu_blk_ctl_domain_data),
+};
+
 static const struct of_device_id imx8m_blk_ctrl_of_match[] = {
 	{
 		.compatible = "fsl,imx8mm-vpu-blk-ctrl",
@@ -600,6 +663,9 @@ static const struct of_device_id imx8m_blk_ctrl_of_match[] = {
 		.compatible = "fsl,imx8mn-disp-blk-ctrl",
 		.data = &imx8mn_disp_blk_ctl_dev_data
 	}, {
+		.compatible = "fsl,imx8mq-vpu-blk-ctrl",
+		.data = &imx8mq_vpu_blk_ctl_dev_data
+	}, {
 		/* Sentinel */
 	}
 };
diff --git a/drivers/soc/imx/soc-imx.c b/drivers/soc/imx/soc-imx.c
index 77bc12039c3d..fab668c83f98 100644
--- a/drivers/soc/imx/soc-imx.c
+++ b/drivers/soc/imx/soc-imx.c
@@ -40,9 +40,6 @@ static int __init imx_soc_device_init(void)
 	if (!__mxc_cpu_type)
 		return 0;
 
-	if (of_machine_is_compatible("fsl,ls1021a"))
-		return 0;
-
 	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 	if (!soc_dev_attr)
 		return -ENOMEM;