pinctrl: add AMD GPIO driver support.

KERNCZ GPIO is a new IP from AMD. it can be implemented in both x86 and ARM.
Current driver patch only support GPIO in x86.
Signed-off-by: Ken Xue <Ken.Xue@amd.com>
[Moved back to <linux/gpio.h> header]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/Kconfig

@@ -67,6 +67,21 @@ config PINCTRL_AT91
 	help
 	  Say Y here to enable the at91 pinctrl driver
 
+config PINCTRL_AMD
+	bool "AMD GPIO pin control"
+	depends on GPIOLIB
+	select GPIOLIB_IRQCHIP
+	select PINCONF
+	select GENERIC_PINCONF
+	help
+	  driver for memory mapped GPIO functionality on AMD platforms
+	  (x86 or arm).Most pins are usually muxed to some other
+	  functionality by firmware,so only a small amount is available
+	  for gpio use.
+
+	  Requires ACPI/FDT device enumeration code to set up a platform
+	  device.
+
 config PINCTRL_LANTIQ
 	bool
 	depends on LANTIQ

drivers/pinctrl/Makefile

@@ -14,6 +14,7 @@ obj-$(CONFIG_PINCTRL_AS3722)	+= pinctrl-as3722.o
 obj-$(CONFIG_PINCTRL_BF54x)	+= pinctrl-adi2-bf54x.o
 obj-$(CONFIG_PINCTRL_BF60x)	+= pinctrl-adi2-bf60x.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
+obj-$(CONFIG_PINCTRL_AMD)	+= pinctrl-amd.o
 obj-$(CONFIG_PINCTRL_FALCON)	+= pinctrl-falcon.o
 obj-$(CONFIG_PINCTRL_MESON)	+= meson/
 obj-$(CONFIG_PINCTRL_PALMAS)	+= pinctrl-palmas.o

drivers/pinctrl/pinctrl-amd.h

+/*
+ * GPIO driver for AMD
+ *
+ * Copyright (c) 2014,2015 Ken Xue <Ken.Xue@amd.com>
+ *		Jeff Wu <Jeff.Wu@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ */
+
+#ifndef _PINCTRL_AMD_H
+#define _PINCTRL_AMD_H
+
+#define TOTAL_NUMBER_OF_PINS	192
+#define AMD_GPIO_PINS_PER_BANK  64
+#define AMD_GPIO_TOTAL_BANKS    3
+
+#define AMD_GPIO_PINS_BANK0     63
+#define AMD_GPIO_PINS_BANK1     64
+#define AMD_GPIO_PINS_BANK2     56
+
+#define WAKE_INT_MASTER_REG 0xfc
+#define EOI_MASK (1 << 29)
+
+#define WAKE_INT_STATUS_REG0 0x2f8
+#define WAKE_INT_STATUS_REG1 0x2fc
+
+#define DB_TMR_OUT_OFF			0
+#define DB_TMR_OUT_UNIT_OFF		4
+#define DB_CNTRL_OFF			5
+#define DB_TMR_LARGE_OFF		7
+#define LEVEL_TRIG_OFF			8
+#define ACTIVE_LEVEL_OFF		9
+#define INTERRUPT_ENABLE_OFF		11
+#define INTERRUPT_MASK_OFF		12
+#define WAKE_CNTRL_OFF			13
+#define PIN_STS_OFF			16
+#define DRV_STRENGTH_SEL_OFF		17
+#define PULL_UP_SEL_OFF			19
+#define PULL_UP_ENABLE_OFF		20
+#define PULL_DOWN_ENABLE_OFF		21
+#define OUTPUT_VALUE_OFF		22
+#define OUTPUT_ENABLE_OFF		23
+#define SW_CNTRL_IN_OFF			24
+#define SW_CNTRL_EN_OFF			25
+#define INTERRUPT_STS_OFF		28
+#define WAKE_STS_OFF			29
+
+#define DB_TMR_OUT_MASK	0xFUL
+#define DB_CNTRl_MASK	0x3UL
+#define ACTIVE_LEVEL_MASK	0x3UL
+#define DRV_STRENGTH_SEL_MASK	0x3UL
+
+#define DB_TYPE_NO_DEBOUNCE               0x0UL
+#define DB_TYPE_PRESERVE_LOW_GLITCH       0x1UL
+#define DB_TYPE_PRESERVE_HIGH_GLITCH      0x2UL
+#define DB_TYPE_REMOVE_GLITCH             0x3UL
+
+#define EDGE_TRAGGER	0x0UL
+#define LEVEL_TRIGGER	0x1UL
+
+#define ACTIVE_HIGH	0x0UL
+#define ACTIVE_LOW	0x1UL
+#define BOTH_EADGE	0x2UL
+
+#define ENABLE_INTERRUPT	0x1UL
+#define DISABLE_INTERRUPT	0x0UL
+
+#define ENABLE_INTERRUPT_MASK	0x0UL
+#define DISABLE_INTERRUPT_MASK	0x1UL
+
+#define CLR_INTR_STAT	0x1UL
+
+struct amd_pingroup {
+	const char *name;
+	const unsigned *pins;
+	unsigned npins;
+};
+
+struct amd_function {
+	const char *name;
+	const char * const *groups;
+	unsigned ngroups;
+};
+
+struct amd_gpio {
+	spinlock_t              lock;
+	void __iomem            *base;
+
+	const struct amd_pingroup *groups;
+	u32 ngroups;
+	struct pinctrl_dev *pctrl;
+	struct gpio_chip        gc;
+	struct resource         *res;
+	struct platform_device  *pdev;
+};
+
+/*  KERNCZ configuration*/
+static const struct pinctrl_pin_desc kerncz_pins[] = {
+	PINCTRL_PIN(0, "GPIO_0"),
+	PINCTRL_PIN(1, "GPIO_1"),
+	PINCTRL_PIN(2, "GPIO_2"),
+	PINCTRL_PIN(3, "GPIO_3"),
+	PINCTRL_PIN(4, "GPIO_4"),
+	PINCTRL_PIN(5, "GPIO_5"),
+	PINCTRL_PIN(6, "GPIO_6"),
+	PINCTRL_PIN(7, "GPIO_7"),
+	PINCTRL_PIN(8, "GPIO_8"),
+	PINCTRL_PIN(9, "GPIO_9"),
+	PINCTRL_PIN(10, "GPIO_10"),
+	PINCTRL_PIN(11, "GPIO_11"),
+	PINCTRL_PIN(12, "GPIO_12"),
+	PINCTRL_PIN(13, "GPIO_13"),
+	PINCTRL_PIN(14, "GPIO_14"),
+	PINCTRL_PIN(15, "GPIO_15"),
+	PINCTRL_PIN(16, "GPIO_16"),
+	PINCTRL_PIN(17, "GPIO_17"),
+	PINCTRL_PIN(18, "GPIO_18"),
+	PINCTRL_PIN(19, "GPIO_19"),
+	PINCTRL_PIN(20, "GPIO_20"),
+	PINCTRL_PIN(23, "GPIO_23"),
+	PINCTRL_PIN(24, "GPIO_24"),
+	PINCTRL_PIN(25, "GPIO_25"),
+	PINCTRL_PIN(26, "GPIO_26"),
+	PINCTRL_PIN(39, "GPIO_39"),
+	PINCTRL_PIN(40, "GPIO_40"),
+	PINCTRL_PIN(43, "GPIO_42"),
+	PINCTRL_PIN(46, "GPIO_46"),
+	PINCTRL_PIN(47, "GPIO_47"),
+	PINCTRL_PIN(48, "GPIO_48"),
+	PINCTRL_PIN(49, "GPIO_49"),
+	PINCTRL_PIN(50, "GPIO_50"),
+	PINCTRL_PIN(51, "GPIO_51"),
+	PINCTRL_PIN(52, "GPIO_52"),
+	PINCTRL_PIN(53, "GPIO_53"),
+	PINCTRL_PIN(54, "GPIO_54"),
+	PINCTRL_PIN(55, "GPIO_55"),
+	PINCTRL_PIN(56, "GPIO_56"),
+	PINCTRL_PIN(57, "GPIO_57"),
+	PINCTRL_PIN(58, "GPIO_58"),
+	PINCTRL_PIN(59, "GPIO_59"),
+	PINCTRL_PIN(60, "GPIO_60"),
+	PINCTRL_PIN(61, "GPIO_61"),
+	PINCTRL_PIN(62, "GPIO_62"),
+	PINCTRL_PIN(64, "GPIO_64"),
+	PINCTRL_PIN(65, "GPIO_65"),
+	PINCTRL_PIN(66, "GPIO_66"),
+	PINCTRL_PIN(68, "GPIO_68"),
+	PINCTRL_PIN(69, "GPIO_69"),
+	PINCTRL_PIN(70, "GPIO_70"),
+	PINCTRL_PIN(71, "GPIO_71"),
+	PINCTRL_PIN(72, "GPIO_72"),
+	PINCTRL_PIN(74, "GPIO_74"),
+	PINCTRL_PIN(75, "GPIO_75"),
+	PINCTRL_PIN(76, "GPIO_76"),
+	PINCTRL_PIN(84, "GPIO_84"),
+	PINCTRL_PIN(85, "GPIO_85"),
+	PINCTRL_PIN(86, "GPIO_86"),
+	PINCTRL_PIN(87, "GPIO_87"),
+	PINCTRL_PIN(88, "GPIO_88"),
+	PINCTRL_PIN(89, "GPIO_89"),
+	PINCTRL_PIN(90, "GPIO_90"),
+	PINCTRL_PIN(91, "GPIO_91"),
+	PINCTRL_PIN(92, "GPIO_92"),
+	PINCTRL_PIN(93, "GPIO_93"),
+	PINCTRL_PIN(95, "GPIO_95"),
+	PINCTRL_PIN(96, "GPIO_96"),
+	PINCTRL_PIN(97, "GPIO_97"),
+	PINCTRL_PIN(98, "GPIO_98"),
+	PINCTRL_PIN(99, "GPIO_99"),
+	PINCTRL_PIN(100, "GPIO_100"),
+	PINCTRL_PIN(101, "GPIO_101"),
+	PINCTRL_PIN(102, "GPIO_102"),
+	PINCTRL_PIN(113, "GPIO_113"),
+	PINCTRL_PIN(114, "GPIO_114"),
+	PINCTRL_PIN(115, "GPIO_115"),
+	PINCTRL_PIN(116, "GPIO_116"),
+	PINCTRL_PIN(117, "GPIO_117"),
+	PINCTRL_PIN(118, "GPIO_118"),
+	PINCTRL_PIN(119, "GPIO_119"),
+	PINCTRL_PIN(120, "GPIO_120"),
+	PINCTRL_PIN(121, "GPIO_121"),
+	PINCTRL_PIN(122, "GPIO_122"),
+	PINCTRL_PIN(126, "GPIO_126"),
+	PINCTRL_PIN(129, "GPIO_129"),
+	PINCTRL_PIN(130, "GPIO_130"),
+	PINCTRL_PIN(131, "GPIO_131"),
+	PINCTRL_PIN(132, "GPIO_132"),
+	PINCTRL_PIN(133, "GPIO_133"),
+	PINCTRL_PIN(135, "GPIO_135"),
+	PINCTRL_PIN(136, "GPIO_136"),
+	PINCTRL_PIN(137, "GPIO_137"),
+	PINCTRL_PIN(138, "GPIO_138"),
+	PINCTRL_PIN(139, "GPIO_139"),
+	PINCTRL_PIN(140, "GPIO_140"),
+	PINCTRL_PIN(141, "GPIO_141"),
+	PINCTRL_PIN(142, "GPIO_142"),
+	PINCTRL_PIN(143, "GPIO_143"),
+	PINCTRL_PIN(144, "GPIO_144"),
+	PINCTRL_PIN(145, "GPIO_145"),
+	PINCTRL_PIN(146, "GPIO_146"),
+	PINCTRL_PIN(147, "GPIO_147"),
+	PINCTRL_PIN(148, "GPIO_148"),
+	PINCTRL_PIN(166, "GPIO_166"),
+	PINCTRL_PIN(167, "GPIO_167"),
+	PINCTRL_PIN(168, "GPIO_168"),
+	PINCTRL_PIN(169, "GPIO_169"),
+	PINCTRL_PIN(170, "GPIO_170"),
+	PINCTRL_PIN(171, "GPIO_171"),
+	PINCTRL_PIN(172, "GPIO_172"),
+	PINCTRL_PIN(173, "GPIO_173"),
+	PINCTRL_PIN(174, "GPIO_174"),
+	PINCTRL_PIN(175, "GPIO_175"),
+	PINCTRL_PIN(176, "GPIO_176"),
+	PINCTRL_PIN(177, "GPIO_177"),
+};
+
+const unsigned i2c0_pins[] = {145, 146};
+const unsigned i2c1_pins[] = {147, 148};
+const unsigned i2c2_pins[] = {113, 114};
+const unsigned i2c3_pins[] = {19, 20};
+
+const unsigned uart0_pins[] = {135, 136, 137, 138, 139};
+const unsigned uart1_pins[] = {140, 141, 142, 143, 144};
+
+static const struct amd_pingroup kerncz_groups[] = {
+	{
+		.name = "i2c0",
+		.pins = i2c0_pins,
+		.npins = 2,
+	},
+	{
+		.name = "i2c1",
+		.pins = i2c1_pins,
+		.npins = 2,
+	},
+	{
+		.name = "i2c2",
+		.pins = i2c2_pins,
+		.npins = 2,
+	},
+	{
+		.name = "i2c3",
+		.pins = i2c3_pins,
+		.npins = 2,
+	},
+	{
+		.name = "uart0",
+		.pins = uart0_pins,
+		.npins = 9,
+	},
+	{
+		.name = "uart1",
+		.pins = uart1_pins,
+		.npins = 5,
+	},
+};
+
+#endif