gpio: Add Phytium SGPIO driver

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

@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/phytium,sgpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium SGPIO controller
+
+description: |
+  This SGPIO controller is for Phytium Pe220x SoCs, which supports up to
+  96 (32x3) Serial GPIOs.
+
+maintainers:
+  - Chen Baozi <chenbaozi@phytium.com.cn>
+
+properties:
+  compatible:
+    const: phytium,sgpio
+
+  reg:
+    maxItems: 1
+    description: Address and length of the register set for the device.
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+    description: |
+      The first cell is the pin number and the second cell is used to specify
+      the gpio polarity.
+        0 = active high
+        1 = active low
+
+  interrupts:
+    maxItems: 1
+
+  ngpios: true
+
+  bus-frequency: true
+
+  clocks:
+    maxItems: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - '#gpio-cells'
+  - interrupts
+  - ngpios
+  - clocks
+  - bus-frequency
+
+examples:
+  - |
+    sgpio: sgpio@2807d000 {
+      compatible = "phytium,sgpio";
+      reg = <0x0 0x2807d000 0x0 0x1000>;
+      interrupts = <GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&sysclk_48mhz>;
+      ngpios = <96>;
+      bus-frequency = <48000>;
+      gpio-controller;
+      #gpio-cells = <2>;
+    };

drivers/gpio/Kconfig

@@ -499,6 +499,15 @@ config GPIO_OMAP
 	help
 	  Say yes here to enable GPIO support for TI OMAP SoCs.
 
+config GPIO_PHYTIUM_SGPIO
+	tristate "Phytium SGPIO support"
+	default y if ARCH_PHYTIUM
+	depends on ARM64
+	select IRQ_DOMAIN
+	select GENERIC_IRQ_CHIP
+	help
+	  Say yes here to enable SGPIO support for Phytium SoCs.
+
 config GPIO_PHYTIUM_PLAT
 	tristate "Phytium GPIO Platform support"
 	default y if ARCH_PHYTIUM

drivers/gpio/Makefile

@@ -125,6 +125,7 @@ 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-$(CONFIG_GPIO_PHYTIUM_SGPIO)        += gpio-phytium-sgpio.o
 obj-$(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