Input: phytium-keypad: Add Phytium keypad driver

This patch adds support for Phytium keypad controller driver on
Phytium SoCs.

Signed-off-by: Song Wenting <[email protected]>
Signed-off-by: Peng Min <[email protected]>
Signed-off-by: Chen Baozi <[email protected]>
Signed-off-by: Lan Hengyu <[email protected]>
Signed-off-by: Wang Yinfeng <[email protected]>
Signed-off-by: Hu Yeqing <[email protected]>

Author: Hu Yeqing

Documentation/devicetree/bindings/input/phytium,keypad.yaml

@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/phytium,keypad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium Keypad Port
+
+maintainers:
+  - Chen Baozi <[email protected]>
+
+allOf:
+  - $ref: "/schemas/input/matrix-keymap.yaml#"
+
+description: |
+  The keypad port is designed to interface with a keypad matrix, which
+  simplify the software task of scanning a keypad matrix. It is capable
+  of detecting, debouncing, and decoding one or multiple keys pressed
+  simultaneously on a keypad.
+
+
+properties:
+  compatible:
+    - const: phytium,keypad
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - linux,keymap
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    keypad: keypad@2807a000 {
+      compatible = "phytium,keypad";
+      reg = <0x 0x2807a000 0x0 0x1000>;
+      interrupts = <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>;
+      keypad,num-rows = <4>;
+      keypad,num-columns = <4>;
+      linux,keymap = <0x00000067	/* KEY_UP */
+                      0x0001006c	/* KEY_DOWN */
+                      0x00020072	/* KEY_VOLUMEDOWN */
+                      0x00030066	/* KEY_HOME */
+                      0x0100006a	/* KEY_RIGHT */
+                      0x01010069	/* KEY_LEFT */
+                      0x0102001c	/* KEY_ENTER */
+                      0x01030073	/* KEY_VOLUMEUP */
+                      0x02000040	/* KEY_F6 */
+                      0x02010042	/* KEY_F8 */
+                      0x02020043	/* KEY_F9 */
+                      0x02030044	/* KEY_F10 */
+                      0x0300003b	/* KEY_F1 */
+                      0x0301003c	/* KEY_F2 */
+                      0x0302003d	/* KEY_F3 */
+                      0x03030074>;	/* KEY_POWER */
+    };

drivers/input/keyboard/Kconfig

@@ -809,4 +809,15 @@ config KEYBOARD_CYPRESS_SF
 	  To compile this driver as a module, choose M here: the
 	  module will be called cypress-sf.
 
+config KEYBOARD_PHYTIUM
+	tristate "Phytium keypad support"
+	depends on ARCH_PHYTIUM
+	select INPUT_MATRIXKMAP
+	help
+	  Say Y here if you want to enable support for Phytium keypad
+	  port.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called phytium_keypad.
+
 endif

drivers/input/keyboard/Makefile

@@ -51,6 +51,7 @@ obj-$(CONFIG_KEYBOARD_NSPIRE)		+= nspire-keypad.o
 obj-$(CONFIG_KEYBOARD_OMAP)		+= omap-keypad.o
 obj-$(CONFIG_KEYBOARD_OMAP4)		+= omap4-keypad.o
 obj-$(CONFIG_KEYBOARD_OPENCORES)	+= opencores-kbd.o
+obj-$(CONFIG_KEYBOARD_PHYTIUM)		+= phytium-keypad.o
 obj-$(CONFIG_KEYBOARD_PINEPHONE)	+= pinephone-keyboard.o
 obj-$(CONFIG_KEYBOARD_PMIC8XXX)		+= pmic8xxx-keypad.o
 obj-$(CONFIG_KEYBOARD_PXA27x)		+= pxa27x_keypad.o