Merge tag 'gpio-updates-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
 "We mostly have various improvements and refactoring all over the place
  but also some interesting new features - like the virtio GPIO driver
  that allows guest VMs to use host's GPIOs. We also have a new/old GPIO
  driver for rockchip - this one has been split out of the pinctrl
  driver.

  Summary:

   - new driver: gpio-virtio allowing a guest VM running linux to access
     GPIO lines provided by the host

   - split the GPIO driver out of the rockchip pin control driver

   - add support for a new model to gpio-aspeed-sgpio, refactor the
     driver and use generic device property interfaces, improve property
     sanitization

   - add ACPI support to gpio-tegra186

   - improve the code setting the line names to support multiple GPIO
     banks per device

   - constify a bunch of OF functions in the core GPIO code and make the
     declaration for one of the core OF functions we use consistent
     within its header

   - use software nodes in intel_quark_i2c_gpio

   - add support for the gpio-line-names property in gpio-mt7621

   - use the standard GPIO function for setting the GPIO names in
     gpio-brcmstb

   - fix a bunch of leaks and other bugs in gpio-mpc8xxx

   - use generic pm callbacks in gpio-ml-ioh

   - improve resource management and PM handling in gpio-mlxbf2

   - modernize and improve the gpio-dwapb driver

   - coding style improvements in gpio-rcar

   - documentation fixes and improvements

   - update the MAINTAINERS entry for gpio-zynq

   - minor tweaks in several drivers"

* tag 'gpio-updates-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (35 commits)
  gpio: mpc8xxx: Use 'devm_gpiochip_add_data()' to simplify the code and avoid a leak
  gpio: mpc8xxx: Fix a potential double iounmap call in 'mpc8xxx_probe()'
  gpio: mpc8xxx: Fix a resources leak in the error handling path of 'mpc8xxx_probe()'
  gpio: viperboard: remove platform_set_drvdata() call in probe
  gpio: virtio: Add missing mailings lists in MAINTAINERS entry
  gpio: virtio: Fix sparse warnings
  gpio: remove the obsolete MX35 3DS BOARD MC9S08DZ60 GPIO functions
  gpio: max730x: Use the right include
  gpio: Add virtio-gpio driver
  gpio: mlxbf2: Use DEFINE_RES_MEM_NAMED() helper macro
  gpio: mlxbf2: Use devm_platform_ioremap_resource()
  gpio: mlxbf2: Drop wrong use of ACPI_PTR()
  gpio: mlxbf2: Convert to device PM ops
  gpio: dwapb: Get rid of legacy platform data
  mfd: intel_quark_i2c_gpio: Convert GPIO to use software nodes
  gpio: dwapb: Read GPIO base from gpio-base property
  gpio: dwapb: Unify ACPI enumeration checks in get_irq() and configure_irqs()
  gpiolib: Deduplicate forward declaration in the consumer.h header
  MAINTAINERS: update gpio-zynq.yaml reference
  gpio: tegra186: Add ACPI support
  ...

2 files changed, 48 insertions, 0 deletions

diff --git a/include/uapi/linux/virtio_gpio.h b/include/uapi/linux/virtio_gpio.h
new file mode 100644
index 000000000000..0445f905d8cc
--- /dev/null
+++ b/include/uapi/linux/virtio_gpio.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+
+#ifndef _LINUX_VIRTIO_GPIO_H
+#define _LINUX_VIRTIO_GPIO_H
+
+#include <linux/types.h>
+
+/* Virtio GPIO request types */
+#define VIRTIO_GPIO_MSG_GET_NAMES		0x0001
+#define VIRTIO_GPIO_MSG_GET_DIRECTION		0x0002
+#define VIRTIO_GPIO_MSG_SET_DIRECTION		0x0003
+#define VIRTIO_GPIO_MSG_GET_VALUE		0x0004
+#define VIRTIO_GPIO_MSG_SET_VALUE		0x0005
+
+/* Possible values of the status field */
+#define VIRTIO_GPIO_STATUS_OK			0x0
+#define VIRTIO_GPIO_STATUS_ERR			0x1
+
+/* Direction types */
+#define VIRTIO_GPIO_DIRECTION_NONE		0x00
+#define VIRTIO_GPIO_DIRECTION_OUT		0x01
+#define VIRTIO_GPIO_DIRECTION_IN		0x02
+
+struct virtio_gpio_config {
+	__le16 ngpio;
+	__u8 padding[2];
+	__le32 gpio_names_size;
+} __packed;
+
+/* Virtio GPIO Request / Response */
+struct virtio_gpio_request {
+	__le16 type;
+	__le16 gpio;
+	__le32 value;
+};
+
+struct virtio_gpio_response {
+	__u8 status;
+	__u8 value;
+};
+
+struct virtio_gpio_response_get_names {
+	__u8 status;
+	__u8 value[];
+};
+
+#endif /* _LINUX_VIRTIO_GPIO_H */
diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h
index 6da2f80a85e8..50d352f5e86f 100644
--- a/include/uapi/linux/virtio_ids.h
+++ b/include/uapi/linux/virtio_ids.h
@@ -58,6 +58,7 @@
 #define VIRTIO_ID_SCMI			32 /* virtio SCMI */
 #define VIRTIO_ID_I2C_ADAPTER		34 /* virtio i2c adapter */
 #define VIRTIO_ID_BT			40 /* virtio bluetooth */
+#define VIRTIO_ID_GPIO			41 /* virtio gpio */
 
 /*
  * Virtio Transitional IDs