gpio: Add Phytium GPIO driver

Documentation/devicetree/bindings/gpio/phytium,gpio.yaml

@@ -0,0 +1,114 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/phytium,gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium GPIO controller
+
+description: |
+  Phytium GPIO controllers have one or two configurable ports, each of which
+  are intended to be represented as child nodes with the generic GPIO-controller
+  properties as desribed in this bindings file.
+
+maintainers:
+  - Chen Baozi <[email protected]>
+
+properties:
+  $nodename:
+    pattern: "^gpio@[0-9a-f]+$"
+
+  compatible:
+    const: phytium,gpio
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  '#gpio-cells':
+    const: 2
+
+  interrupts:
+    description: |
+      The interrupts to the parent controller raised when GPIOs generate
+      the interrupts. If the controller provides one combined interrupt
+      for all GPIOs, specify a single interrupt. If the controller provides
+      one interrupt for each GPIO, provide a list of interrupts that
+      correspond to each of the GPIO pins.
+    minItems: 1
+    maxItems: 32
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+patternProperties:
+  "^gpio-(port|controller)@[0-9a-f]+$":
+    type: object
+    properties:
+      compatible:
+        const: phytium,gpio-port
+
+      reg:
+        maxItems: 1
+
+      nr-gpios:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: The number of GPIO pins exported by the port.
+        default: 32
+        minimum: 1
+        maximum: 32
+
+    required:
+      - compatible
+      - reg
+      - gpio-controller
+      - '#gpio-cells'
+
+    dependencies:
+      interrupt-controller: [ interrupts ]
+
+    additionalProperties: false
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+examples:
+  - |
+    gpio: gpio@28004000 {
+      compatible = "phytium,gpio";
+      reg = <0x0 0x28004000 0x0 0x1000>;
+      gpio-controller;
+      #gpio-cells = <2>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
+
+      porta: gpio-port@0 {
+        compatible = "phytium,gpio-port";
+        reg = <0>;
+        nr-gpios = <8>;
+      };
+
+      portb: gpio-port@1 {
+        compatible = "phytium,gpio-port";
+        reg = <1>;
+        nr-gpios = <8>;
+      };
+};
+...

MAINTAINERS

@@ -17424,7 +17424,9 @@ ARM/PHYTIUM SOC SUPPORT
 M:	Wang Yinfeng <[email protected]>
 S:	Maintained
 W:	https://gerrit.b.cpu.ac/c/linux
+F:	Documentation/devicetree/bindings/gpio/phytium,gpio.yaml
 F:	arch/arm64/boot/dts/phytium/*
+F:	drivers/gpio/gpio-phytium*
 
 QAT DRIVER
 M:	Giovanni Cabiddu <[email protected]>

drivers/gpio/Kconfig

@@ -105,6 +105,10 @@ config GPIO_REGMAP
 
 # put drivers in the right section, in alphabetical order
 
+# This symbol is selected by both MMIO and PCI expanders
+config GPIO_PHYTIUM_CORE
+	tristate
+
 # This symbol is selected by both I2C and SPI expanders
 config GPIO_MAX730X
 	tristate
@@ -495,6 +499,18 @@ config GPIO_OMAP
 	help
 	  Say yes here to enable GPIO support for TI OMAP SoCs.
 
+config GPIO_PHYTIUM_PLAT
+	tristate "Phytium GPIO Platform support"
+	default y if ARCH_PHYTIUM
+	depends on ARM64
+	select GPIO_PHYTIUM_CORE
+	select IRQ_DOMAIN
+	select GENERIC_IRQ_CHIP
+	select GPIOLIB_IRQCHIP
+	help
+	  Say yes here to support the on-chip GPIO controller for the
+	  Phytium SoC family.
+
 config GPIO_PL061
 	tristate "PrimeCell PL061 GPIO support"
 	depends on ARM_AMBA
@@ -1680,6 +1696,19 @@ config GPIO_PCIE_IDIO_24
 	  Input filter control is not supported by this driver, and the input
 	  filters are deactivated by this driver.
 
+config GPIO_PHYTIUM_PCI
+	tristate "Phytium GPIO PCI support"
+	select GPIO_PHYTIUM_CORE
+	select IRQ_DOMAIN
+	select GENERIC_IRQ_CHIP
+	select GPIOLIB_IRQCHIP
+	help
+	  Say Y here to support Phytium PCI GPIO controller on Px210 chipset.
+	  An interrupt is generated when any of the inputs change state
+	  (low to high or high to low).
+
+	  This driver can be used for Phytium Px210.
+
 config GPIO_RDC321X
 	tristate "RDC R-321x GPIO support"
 	select MFD_CORE

drivers/gpio/Makefile

@@ -125,6 +125,9 @@ obj-$(CONFIG_GPIO_PCF857X)		+= gpio-pcf857x.o
 obj-$(CONFIG_GPIO_PCH)			+= gpio-pch.o
 obj-$(CONFIG_GPIO_PCIE_IDIO_24)		+= gpio-pcie-idio-24.o
 obj-$(CONFIG_GPIO_PCI_IDIO_16)		+= gpio-pci-idio-16.o
+obj-$(CONFIG_GPIO_PHYTIUM_CORE)		+= gpio-phytium-core.o
+obj-$(CONFIG_GPIO_PHYTIUM_PCI)		+= gpio-phytium-pci.o
+obj-$(CONFIG_GPIO_PHYTIUM_PLAT)		+= gpio-phytium-platform.o
 obj-$(CONFIG_GPIO_PISOSR)		+= gpio-pisosr.o
 obj-$(CONFIG_GPIO_PL061)		+= gpio-pl061.o
 obj-$(CONFIG_GPIO_PMIC_EIC_SPRD)	+= gpio-pmic-eic-sprd.o