Initial import

1 files changed, 2093 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
new file mode 100644
index 000000000..dee7d5f06
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -0,0 +1,2093 @@
+/*
+ * Pinctrl driver for Rockchip SoCs
+ *
+ * Copyright (c) 2013 MundoReader S.L.
+ * Author: Heiko Stuebner <heiko@sntech.de>
+ *
+ * With some ideas taken from pinctrl-samsung:
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2012 Linaro Ltd
+ *		http://www.linaro.org
+ *
+ * and pinctrl-at91:
+ * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/bitops.h>
+#include <linux/gpio.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+
+#include "core.h"
+#include "pinconf.h"
+
+/* GPIO control registers */
+#define GPIO_SWPORT_DR		0x00
+#define GPIO_SWPORT_DDR		0x04
+#define GPIO_INTEN		0x30
+#define GPIO_INTMASK		0x34
+#define GPIO_INTTYPE_LEVEL	0x38
+#define GPIO_INT_POLARITY	0x3c
+#define GPIO_INT_STATUS		0x40
+#define GPIO_INT_RAWSTATUS	0x44
+#define GPIO_DEBOUNCE		0x48
+#define GPIO_PORTS_EOI		0x4c
+#define GPIO_EXT_PORT		0x50
+#define GPIO_LS_SYNC		0x60
+
+enum rockchip_pinctrl_type {
+	RK2928,
+	RK3066B,
+	RK3188,
+	RK3288,
+};
+
+/**
+ * Encode variants of iomux registers into a type variable
+ */
+#define IOMUX_GPIO_ONLY		BIT(0)
+#define IOMUX_WIDTH_4BIT	BIT(1)
+#define IOMUX_SOURCE_PMU	BIT(2)
+#define IOMUX_UNROUTED		BIT(3)
+
+/**
+ * @type: iomux variant using IOMUX_* constants
+ * @offset: if initialized to -1 it will be autocalculated, by specifying
+ *	    an initial offset value the relevant source offset can be reset
+ *	    to a new value for autocalculating the following iomux registers.
+ */
+struct rockchip_iomux {
+	int				type;
+	int				offset;
+};
+
+/**
+ * @reg_base: register base of the gpio bank
+ * @reg_pull: optional separate register for additional pull settings
+ * @clk: clock of the gpio bank
+ * @irq: interrupt of the gpio bank
+ * @saved_masks: Saved content of GPIO_INTEN at suspend time.
+ * @pin_base: first pin number
+ * @nr_pins: number of pins in this bank
+ * @name: name of the bank
+ * @bank_num: number of the bank, to account for holes
+ * @iomux: array describing the 4 iomux sources of the bank
+ * @valid: are all necessary informations present
+ * @of_node: dt node of this bank
+ * @drvdata: common pinctrl basedata
+ * @domain: irqdomain of the gpio bank
+ * @gpio_chip: gpiolib chip
+ * @grange: gpio range
+ * @slock: spinlock for the gpio bank
+ */
+struct rockchip_pin_bank {
+	void __iomem			*reg_base;
+	struct regmap			*regmap_pull;
+	struct clk			*clk;
+	int				irq;
+	u32				saved_masks;
+	u32				pin_base;
+	u8				nr_pins;
+	char				*name;
+	u8				bank_num;
+	struct rockchip_iomux		iomux[4];
+	bool				valid;
+	struct device_node		*of_node;
+	struct rockchip_pinctrl		*drvdata;
+	struct irq_domain		*domain;
+	struct gpio_chip		gpio_chip;
+	struct pinctrl_gpio_range	grange;
+	spinlock_t			slock;
+	u32				toggle_edge_mode;
+};
+
+#define PIN_BANK(id, pins, label)			\
+	{						\
+		.bank_num	= id,			\
+		.nr_pins	= pins,			\
+		.name		= label,		\
+		.iomux		= {			\
+			{ .offset = -1 },		\
+			{ .offset = -1 },		\
+			{ .offset = -1 },		\
+			{ .offset = -1 },		\
+		},					\
+	}
+
+#define PIN_BANK_IOMUX_FLAGS(id, pins, label, iom0, iom1, iom2, iom3)	\
+	{								\
+		.bank_num	= id,					\
+		.nr_pins	= pins,					\
+		.name		= label,				\
+		.iomux		= {					\
+			{ .type = iom0, .offset = -1 },			\
+			{ .type = iom1, .offset = -1 },			\
+			{ .type = iom2, .offset = -1 },			\
+			{ .type = iom3, .offset = -1 },			\
+		},							\
+	}
+
+/**
+ */
+struct rockchip_pin_ctrl {
+	struct rockchip_pin_bank	*pin_banks;
+	u32				nr_banks;
+	u32				nr_pins;
+	char				*label;
+	enum rockchip_pinctrl_type	type;
+	int				grf_mux_offset;
+	int				pmu_mux_offset;
+	void	(*pull_calc_reg)(struct rockchip_pin_bank *bank,
+				    int pin_num, struct regmap **regmap,
+				    int *reg, u8 *bit);
+};
+
+struct rockchip_pin_config {
+	unsigned int		func;
+	unsigned long		*configs;
+	unsigned int		nconfigs;
+};
+
+/**
+ * struct rockchip_pin_group: represent group of pins of a pinmux function.
+ * @name: name of the pin group, used to lookup the group.
+ * @pins: the pins included in this group.
+ * @npins: number of pins included in this group.
+ * @func: the mux function number to be programmed when selected.
+ * @configs: the config values to be set for each pin
+ * @nconfigs: number of configs for each pin
+ */
+struct rockchip_pin_group {
+	const char			*name;
+	unsigned int			npins;
+	unsigned int			*pins;
+	struct rockchip_pin_config	*data;
+};
+
+/**
+ * struct rockchip_pmx_func: represent a pin function.
+ * @name: name of the pin function, used to lookup the function.
+ * @groups: one or more names of pin groups that provide this function.
+ * @num_groups: number of groups included in @groups.
+ */
+struct rockchip_pmx_func {
+	const char		*name;
+	const char		**groups;
+	u8			ngroups;
+};
+
+struct rockchip_pinctrl {
+	struct regmap			*regmap_base;
+	int				reg_size;
+	struct regmap			*regmap_pull;
+	struct regmap			*regmap_pmu;
+	struct device			*dev;
+	struct rockchip_pin_ctrl	*ctrl;
+	struct pinctrl_desc		pctl;
+	struct pinctrl_dev		*pctl_dev;
+	struct rockchip_pin_group	*groups;
+	unsigned int			ngroups;
+	struct rockchip_pmx_func	*functions;
+	unsigned int			nfunctions;
+};
+
+static struct regmap_config rockchip_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
+{
+	return container_of(gc, struct rockchip_pin_bank, gpio_chip);
+}
+
+static const inline struct rockchip_pin_group *pinctrl_name_to_group(
+					const struct rockchip_pinctrl *info,
+					const char *name)
+{
+	int i;
+
+	for (i = 0; i < info->ngroups; i++) {
+		if (!strcmp(info->groups[i].name, name))
+			return &info->groups[i];
+	}
+
+	return NULL;
+}
+
+/*
+ * given a pin number that is local to a pin controller, find out the pin bank
+ * and the register base of the pin bank.
+ */
+static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
+								unsigned pin)
+{
+	struct rockchip_pin_bank *b = info->ctrl->pin_banks;
+
+	while (pin >= (b->pin_base + b->nr_pins))
+		b++;
+
+	return b;
+}
+
+static struct rockchip_pin_bank *bank_num_to_bank(
+					struct rockchip_pinctrl *info,
+					unsigned num)
+{
+	struct rockchip_pin_bank *b = info->ctrl->pin_banks;
+	int i;
+
+	for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
+		if (b->bank_num == num)
+			return b;
+	}
+
+	return ERR_PTR(-EINVAL);
+}
+
+/*
+ * Pinctrl_ops handling
+ */
+
+static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	return info->ngroups;
+}
+
+static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
+							unsigned selector)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	return info->groups[selector].name;
+}
+
+static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
+				      unsigned selector, const unsigned **pins,
+				      unsigned *npins)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	if (selector >= info->ngroups)
+		return -EINVAL;
+
+	*pins = info->groups[selector].pins;
+	*npins = info->groups[selector].npins;
+
+	return 0;
+}
+
+static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
+				 struct device_node *np,
+				 struct pinctrl_map **map, unsigned *num_maps)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+	const struct rockchip_pin_group *grp;
+	struct pinctrl_map *new_map;
+	struct device_node *parent;
+	int map_num = 1;
+	int i;
+
+	/*
+	 * first find the group of this node and check if we need to create
+	 * config maps for pins
+	 */
+	grp = pinctrl_name_to_group(info, np->name);
+	if (!grp) {
+		dev_err(info->dev, "unable to find group for node %s\n",
+			np->name);
+		return -EINVAL;
+	}
+
+	map_num += grp->npins;
+	new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
+								GFP_KERNEL);
+	if (!new_map)
+		return -ENOMEM;
+
+	*map = new_map;
+	*num_maps = map_num;
+
+	/* create mux map */
+	parent = of_get_parent(np);
+	if (!parent) {
+		devm_kfree(pctldev->dev, new_map);
+		return -EINVAL;
+	}
+	new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
+	new_map[0].data.mux.function = parent->name;
+	new_map[0].data.mux.group = np->name;
+	of_node_put(parent);
+
+	/* create config map */
+	new_map++;
+	for (i = 0; i < grp->npins; i++) {
+		new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
+		new_map[i].data.configs.group_or_pin =
+				pin_get_name(pctldev, grp->pins[i]);
+		new_map[i].data.configs.configs = grp->data[i].configs;
+		new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
+	}
+
+	dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
+		(*map)->data.mux.function, (*map)->data.mux.group, map_num);
+
+	return 0;
+}
+
+static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
+				    struct pinctrl_map *map, unsigned num_maps)
+{
+}
+
+static const struct pinctrl_ops rockchip_pctrl_ops = {
+	.get_groups_count	= rockchip_get_groups_count,
+	.get_group_name		= rockchip_get_group_name,
+	.get_group_pins		= rockchip_get_group_pins,
+	.dt_node_to_map		= rockchip_dt_node_to_map,
+	.dt_free_map		= rockchip_dt_free_map,
+};
+
+/*
+ * Hardware access
+ */
+
+static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+	int iomux_num = (pin / 8);
+	struct regmap *regmap;
+	unsigned int val;
+	int reg, ret, mask;
+	u8 bit;
+
+	if (iomux_num > 3)
+		return -EINVAL;
+
+	if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
+		dev_err(info->dev, "pin %d is unrouted\n", pin);
+		return -EINVAL;
+	}
+
+	if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY)
+		return RK_FUNC_GPIO;
+
+	regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
+				? info->regmap_pmu : info->regmap_base;
+
+	/* get basic quadrupel of mux registers and the correct reg inside */
+	mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
+	reg = bank->iomux[iomux_num].offset;
+	if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
+		if ((pin % 8) >= 4)
+			reg += 0x4;
+		bit = (pin % 4) * 4;
+	} else {
+		bit = (pin % 8) * 2;
+	}
+
+	ret = regmap_read(regmap, reg, &val);
+	if (ret)
+		return ret;
+
+	return ((val >> bit) & mask);
+}
+
+/*
+ * Set a new mux function for a pin.
+ *
+ * The register is divided into the upper and lower 16 bit. When changing
+ * a value, the previous register value is not read and changed. Instead
+ * it seems the changed bits are marked in the upper 16 bit, while the
+ * changed value gets set in the same offset in the lower 16 bit.
+ * All pin settings seem to be 2 bit wide in both the upper and lower
+ * parts.
+ * @bank: pin bank to change
+ * @pin: pin to change
+ * @mux: new mux function to set
+ */
+static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+	int iomux_num = (pin / 8);
+	struct regmap *regmap;
+	int reg, ret, mask;
+	unsigned long flags;
+	u8 bit;
+	u32 data, rmask;
+
+	if (iomux_num > 3)
+		return -EINVAL;
+
+	if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
+		dev_err(info->dev, "pin %d is unrouted\n", pin);
+		return -EINVAL;
+	}
+
+	if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY) {
+		if (mux != RK_FUNC_GPIO) {
+			dev_err(info->dev,
+				"pin %d only supports a gpio mux\n", pin);
+			return -ENOTSUPP;
+		} else {
+			return 0;
+		}
+	}
+
+	dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
+						bank->bank_num, pin, mux);
+
+	regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
+				? info->regmap_pmu : info->regmap_base;
+
+	/* get basic quadrupel of mux registers and the correct reg inside */
+	mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
+	reg = bank->iomux[iomux_num].offset;
+	if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
+		if ((pin % 8) >= 4)
+			reg += 0x4;
+		bit = (pin % 4) * 4;
+	} else {
+		bit = (pin % 8) * 2;
+	}
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	data = (mask << (bit + 16));
+	rmask = data | (data >> 16);
+	data |= (mux & mask) << bit;
+	ret = regmap_update_bits(regmap, reg, rmask, data);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	return ret;
+}
+
+#define RK2928_PULL_OFFSET		0x118
+#define RK2928_PULL_PINS_PER_REG	16
+#define RK2928_PULL_BANK_STRIDE		8
+
+static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
+				    int pin_num, struct regmap **regmap,
+				    int *reg, u8 *bit)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+
+	*regmap = info->regmap_base;
+	*reg = RK2928_PULL_OFFSET;
+	*reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
+	*reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
+
+	*bit = pin_num % RK2928_PULL_PINS_PER_REG;
+};
+
+#define RK3188_PULL_OFFSET		0x164
+#define RK3188_PULL_BITS_PER_PIN	2
+#define RK3188_PULL_PINS_PER_REG	8
+#define RK3188_PULL_BANK_STRIDE		16
+#define RK3188_PULL_PMU_OFFSET		0x64
+
+static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
+				    int pin_num, struct regmap **regmap,
+				    int *reg, u8 *bit)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+
+	/* The first 12 pins of the first bank are located elsewhere */
+	if (bank->bank_num == 0 && pin_num < 12) {
+		*regmap = info->regmap_pmu ? info->regmap_pmu
+					   : bank->regmap_pull;
+		*reg = info->regmap_pmu ? RK3188_PULL_PMU_OFFSET : 0;
+		*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
+		*bit = pin_num % RK3188_PULL_PINS_PER_REG;
+		*bit *= RK3188_PULL_BITS_PER_PIN;
+	} else {
+		*regmap = info->regmap_pull ? info->regmap_pull
+					    : info->regmap_base;
+		*reg = info->regmap_pull ? 0 : RK3188_PULL_OFFSET;
+
+		/* correct the offset, as it is the 2nd pull register */
+		*reg -= 4;
+		*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
+		*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
+
+		/*
+		 * The bits in these registers have an inverse ordering
+		 * with the lowest pin being in bits 15:14 and the highest
+		 * pin in bits 1:0
+		 */
+		*bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
+		*bit *= RK3188_PULL_BITS_PER_PIN;
+	}
+}
+
+#define RK3288_PULL_OFFSET		0x140
+static void rk3288_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
+				    int pin_num, struct regmap **regmap,
+				    int *reg, u8 *bit)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+
+	/* The first 24 pins of the first bank are located in PMU */
+	if (bank->bank_num == 0) {
+		*regmap = info->regmap_pmu;
+		*reg = RK3188_PULL_PMU_OFFSET;
+
+		*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
+		*bit = pin_num % RK3188_PULL_PINS_PER_REG;
+		*bit *= RK3188_PULL_BITS_PER_PIN;
+	} else {
+		*regmap = info->regmap_base;
+		*reg = RK3288_PULL_OFFSET;
+
+		/* correct the offset, as we're starting with the 2nd bank */
+		*reg -= 0x10;
+		*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
+		*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
+
+		*bit = (pin_num % RK3188_PULL_PINS_PER_REG);
+		*bit *= RK3188_PULL_BITS_PER_PIN;
+	}
+}
+
+#define RK3288_DRV_PMU_OFFSET		0x70
+#define RK3288_DRV_GRF_OFFSET		0x1c0
+#define RK3288_DRV_BITS_PER_PIN		2
+#define RK3288_DRV_PINS_PER_REG		8
+#define RK3288_DRV_BANK_STRIDE		16
+static int rk3288_drv_list[] = { 2, 4, 8, 12 };
+
+static void rk3288_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
+				    int pin_num, struct regmap **regmap,
+				    int *reg, u8 *bit)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+
+	/* The first 24 pins of the first bank are located in PMU */
+	if (bank->bank_num == 0) {
+		*regmap = info->regmap_pmu;
+		*reg = RK3288_DRV_PMU_OFFSET;
+
+		*reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
+		*bit = pin_num % RK3288_DRV_PINS_PER_REG;
+		*bit *= RK3288_DRV_BITS_PER_PIN;
+	} else {
+		*regmap = info->regmap_base;
+		*reg = RK3288_DRV_GRF_OFFSET;
+
+		/* correct the offset, as we're starting with the 2nd bank */
+		*reg -= 0x10;
+		*reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
+		*reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
+
+		*bit = (pin_num % RK3288_DRV_PINS_PER_REG);
+		*bit *= RK3288_DRV_BITS_PER_PIN;
+	}
+}
+
+static int rk3288_get_drive(struct rockchip_pin_bank *bank, int pin_num)
+{
+	struct regmap *regmap;
+	int reg, ret;
+	u32 data;
+	u8 bit;
+
+	rk3288_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
+
+	ret = regmap_read(regmap, reg, &data);
+	if (ret)
+		return ret;
+
+	data >>= bit;
+	data &= (1 << RK3288_DRV_BITS_PER_PIN) - 1;
+
+	return rk3288_drv_list[data];
+}
+
+static int rk3288_set_drive(struct rockchip_pin_bank *bank, int pin_num,
+			    int strength)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+	struct regmap *regmap;
+	unsigned long flags;
+	int reg, ret, i;
+	u32 data, rmask;
+	u8 bit;
+
+	rk3288_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
+
+	ret = -EINVAL;
+	for (i = 0; i < ARRAY_SIZE(rk3288_drv_list); i++) {
+		if (rk3288_drv_list[i] == strength) {
+			ret = i;
+			break;
+		}
+	}
+
+	if (ret < 0) {
+		dev_err(info->dev, "unsupported driver strength %d\n",
+			strength);
+		return ret;
+	}
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	/* enable the write to the equivalent lower bits */
+	data = ((1 << RK3288_DRV_BITS_PER_PIN) - 1) << (bit + 16);
+	rmask = data | (data >> 16);
+	data |= (ret << bit);
+
+	ret = regmap_update_bits(regmap, reg, rmask, data);
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	return ret;
+}
+
+static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+	struct rockchip_pin_ctrl *ctrl = info->ctrl;
+	struct regmap *regmap;
+	int reg, ret;
+	u8 bit;
+	u32 data;
+
+	/* rk3066b does support any pulls */
+	if (ctrl->type == RK3066B)
+		return PIN_CONFIG_BIAS_DISABLE;
+
+	ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
+
+	ret = regmap_read(regmap, reg, &data);
+	if (ret)
+		return ret;
+
+	switch (ctrl->type) {
+	case RK2928:
+		return !(data & BIT(bit))
+				? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
+				: PIN_CONFIG_BIAS_DISABLE;
+	case RK3188:
+	case RK3288:
+		data >>= bit;
+		data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
+
+		switch (data) {
+		case 0:
+			return PIN_CONFIG_BIAS_DISABLE;
+		case 1:
+			return PIN_CONFIG_BIAS_PULL_UP;
+		case 2:
+			return PIN_CONFIG_BIAS_PULL_DOWN;
+		case 3:
+			return PIN_CONFIG_BIAS_BUS_HOLD;
+		}
+
+		dev_err(info->dev, "unknown pull setting\n");
+		return -EIO;
+	default:
+		dev_err(info->dev, "unsupported pinctrl type\n");
+		return -EINVAL;
+	};
+}
+
+static int rockchip_set_pull(struct rockchip_pin_bank *bank,
+					int pin_num, int pull)
+{
+	struct rockchip_pinctrl *info = bank->drvdata;
+	struct rockchip_pin_ctrl *ctrl = info->ctrl;
+	struct regmap *regmap;
+	int reg, ret;
+	unsigned long flags;
+	u8 bit;
+	u32 data, rmask;
+
+	dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
+		 bank->bank_num, pin_num, pull);
+
+	/* rk3066b does support any pulls */
+	if (ctrl->type == RK3066B)
+		return pull ? -EINVAL : 0;
+
+	ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
+
+	switch (ctrl->type) {
+	case RK2928:
+		spin_lock_irqsave(&bank->slock, flags);
+
+		data = BIT(bit + 16);
+		if (pull == PIN_CONFIG_BIAS_DISABLE)
+			data |= BIT(bit);
+		ret = regmap_write(regmap, reg, data);
+
+		spin_unlock_irqrestore(&bank->slock, flags);
+		break;
+	case RK3188:
+	case RK3288:
+		spin_lock_irqsave(&bank->slock, flags);
+
+		/* enable the write to the equivalent lower bits */
+		data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
+		rmask = data | (data >> 16);
+
+		switch (pull) {
+		case PIN_CONFIG_BIAS_DISABLE:
+			break;
+		case PIN_CONFIG_BIAS_PULL_UP:
+			data |= (1 << bit);
+			break;
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			data |= (2 << bit);
+			break;
+		case PIN_CONFIG_BIAS_BUS_HOLD:
+			data |= (3 << bit);
+			break;
+		default:
+			spin_unlock_irqrestore(&bank->slock, flags);
+			dev_err(info->dev, "unsupported pull setting %d\n",
+				pull);
+			return -EINVAL;
+		}
+
+		ret = regmap_update_bits(regmap, reg, rmask, data);
+
+		spin_unlock_irqrestore(&bank->slock, flags);
+		break;
+	default:
+		dev_err(info->dev, "unsupported pinctrl type\n");
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+/*
+ * Pinmux_ops handling
+ */
+
+static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	return info->nfunctions;
+}
+
+static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
+					  unsigned selector)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	return info->functions[selector].name;
+}
+
+static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
+				unsigned selector, const char * const **groups,
+				unsigned * const num_groups)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+	*groups = info->functions[selector].groups;
+	*num_groups = info->functions[selector].ngroups;
+
+	return 0;
+}
+
+static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
+			    unsigned group)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+	const unsigned int *pins = info->groups[group].pins;
+	const struct rockchip_pin_config *data = info->groups[group].data;
+	struct rockchip_pin_bank *bank;
+	int cnt, ret = 0;
+
+	dev_dbg(info->dev, "enable function %s group %s\n",
+		info->functions[selector].name, info->groups[group].name);
+
+	/*
+	 * for each pin in the pin group selected, program the correspoding pin
+	 * pin function number in the config register.
+	 */
+	for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
+		bank = pin_to_bank(info, pins[cnt]);
+		ret = rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
+				       data[cnt].func);
+		if (ret)
+			break;
+	}
+
+	if (ret) {
+		/* revert the already done pin settings */
+		for (cnt--; cnt >= 0; cnt--)
+			rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
+
+		return ret;
+	}
+
+	return 0;
+}
+
+/*
+ * The calls to gpio_direction_output() and gpio_direction_input()
+ * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
+ * function called from the gpiolib interface).
+ */
+static int _rockchip_pmx_gpio_set_direction(struct gpio_chip *chip,
+					    int pin, bool input)
+{
+	struct rockchip_pin_bank *bank;
+	int ret;
+	unsigned long flags;
+	u32 data;
+
+	bank = gc_to_pin_bank(chip);
+
+	ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
+	if (ret < 0)
+		return ret;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+	/* set bit to 1 for output, 0 for input */
+	if (!input)
+		data |= BIT(pin);
+	else
+		data &= ~BIT(pin);
+	writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	return 0;
+}
+
+static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+					      struct pinctrl_gpio_range *range,
+					      unsigned offset, bool input)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+	struct gpio_chip *chip;
+	int pin;
+
+	chip = range->gc;
+	pin = offset - chip->base;
+	dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
+		 offset, range->name, pin, input ? "input" : "output");
+
+	return _rockchip_pmx_gpio_set_direction(chip, offset - chip->base,
+						input);
+}
+
+static const struct pinmux_ops rockchip_pmx_ops = {
+	.get_functions_count	= rockchip_pmx_get_funcs_count,
+	.get_function_name	= rockchip_pmx_get_func_name,
+	.get_function_groups	= rockchip_pmx_get_groups,
+	.set_mux		= rockchip_pmx_set,
+	.gpio_set_direction	= rockchip_pmx_gpio_set_direction,
+};
+
+/*
+ * Pinconf_ops handling
+ */
+
+static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
+					enum pin_config_param pull)
+{
+	switch (ctrl->type) {
+	case RK2928:
+		return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
+					pull == PIN_CONFIG_BIAS_DISABLE);
+	case RK3066B:
+		return pull ? false : true;
+	case RK3188:
+	case RK3288:
+		return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
+	}
+
+	return false;
+}
+
+static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value);
+static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset);
+
+/* set the pin config settings for a specified pin */
+static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+				unsigned long *configs, unsigned num_configs)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+	struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
+	enum pin_config_param param;
+	u16 arg;
+	int i;
+	int rc;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_BIAS_DISABLE:
+			rc =  rockchip_set_pull(bank, pin - bank->pin_base,
+				param);
+			if (rc)
+				return rc;
+			break;
+		case PIN_CONFIG_BIAS_PULL_UP:
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+		case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+		case PIN_CONFIG_BIAS_BUS_HOLD:
+			if (!rockchip_pinconf_pull_valid(info->ctrl, param))
+				return -ENOTSUPP;
+
+			if (!arg)
+				return -EINVAL;
+
+			rc = rockchip_set_pull(bank, pin - bank->pin_base,
+				param);
+			if (rc)
+				return rc;
+			break;
+		case PIN_CONFIG_OUTPUT:
+			rockchip_gpio_set(&bank->gpio_chip,
+					  pin - bank->pin_base, arg);
+			rc = _rockchip_pmx_gpio_set_direction(&bank->gpio_chip,
+					  pin - bank->pin_base, false);
+			if (rc)
+				return rc;
+			break;
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			/* rk3288 is the first with per-pin drive-strength */
+			if (info->ctrl->type != RK3288)
+				return -ENOTSUPP;
+
+			rc = rk3288_set_drive(bank, pin - bank->pin_base, arg);
+			if (rc < 0)
+				return rc;
+			break;
+		default:
+			return -ENOTSUPP;
+			break;
+		}
+	} /* for each config */
+
+	return 0;
+}
+
+/* get the pin config settings for a specified pin */
+static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+							unsigned long *config)
+{
+	struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+	struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
+	enum pin_config_param param = pinconf_to_config_param(*config);
+	u16 arg;
+	int rc;
+
+	switch (param) {
+	case PIN_CONFIG_BIAS_DISABLE:
+		if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
+			return -EINVAL;
+
+		arg = 0;
+		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+	case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+	case PIN_CONFIG_BIAS_BUS_HOLD:
+		if (!rockchip_pinconf_pull_valid(info->ctrl, param))
+			return -ENOTSUPP;
+
+		if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
+			return -EINVAL;
+
+		arg = 1;
+		break;
+	case PIN_CONFIG_OUTPUT:
+		rc = rockchip_get_mux(bank, pin - bank->pin_base);
+		if (rc != RK_FUNC_GPIO)
+			return -EINVAL;
+
+		rc = rockchip_gpio_get(&bank->gpio_chip, pin - bank->pin_base);
+		if (rc < 0)
+			return rc;
+
+		arg = rc ? 1 : 0;
+		break;
+	case PIN_CONFIG_DRIVE_STRENGTH:
+		/* rk3288 is the first with per-pin drive-strength */
+		if (info->ctrl->type != RK3288)
+			return -ENOTSUPP;
+
+		rc = rk3288_get_drive(bank, pin - bank->pin_base);
+		if (rc < 0)
+			return rc;
+
+		arg = rc;
+		break;
+	default:
+		return -ENOTSUPP;
+		break;
+	}
+
+	*config = pinconf_to_config_packed(param, arg);
+
+	return 0;
+}
+
+static const struct pinconf_ops rockchip_pinconf_ops = {
+	.pin_config_get			= rockchip_pinconf_get,
+	.pin_config_set			= rockchip_pinconf_set,
+	.is_generic			= true,
+};
+
+static const struct of_device_id rockchip_bank_match[] = {
+	{ .compatible = "rockchip,gpio-bank" },
+	{ .compatible = "rockchip,rk3188-gpio-bank0" },
+	{},
+};
+
+static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
+						struct device_node *np)
+{
+	struct device_node *child;
+
+	for_each_child_of_node(np, child) {
+		if (of_match_node(rockchip_bank_match, child))
+			continue;
+
+		info->nfunctions++;
+		info->ngroups += of_get_child_count(child);
+	}
+}
+
+static int rockchip_pinctrl_parse_groups(struct device_node *np,
+					      struct rockchip_pin_group *grp,
+					      struct rockchip_pinctrl *info,
+					      u32 index)
+{
+	struct rockchip_pin_bank *bank;
+	int size;
+	const __be32 *list;
+	int num;
+	int i, j;
+	int ret;
+
+	dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
+
+	/* Initialise group */
+	grp->name = np->name;
+
+	/*
+	 * the binding format is rockchip,pins = <bank pin mux CONFIG>,
+	 * do sanity check and calculate pins number
+	 */
+	list = of_get_property(np, "rockchip,pins", &size);
+	/* we do not check return since it's safe node passed down */
+	size /= sizeof(*list);
+	if (!size || size % 4) {
+		dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
+		return -EINVAL;
+	}
+
+	grp->npins = size / 4;
+
+	grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
+						GFP_KERNEL);
+	grp->data = devm_kzalloc(info->dev, grp->npins *
+					  sizeof(struct rockchip_pin_config),
+					GFP_KERNEL);
+	if (!grp->pins || !grp->data)
+		return -ENOMEM;
+
+	for (i = 0, j = 0; i < size; i += 4, j++) {
+		const __be32 *phandle;
+		struct device_node *np_config;
+
+		num = be32_to_cpu(*list++);
+		bank = bank_num_to_bank(info, num);
+		if (IS_ERR(bank))
+			return PTR_ERR(bank);
+
+		grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
+		grp->data[j].func = be32_to_cpu(*list++);
+
+		phandle = list++;
+		if (!phandle)
+			return -EINVAL;
+
+		np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
+		ret = pinconf_generic_parse_dt_config(np_config, NULL,
+				&grp->data[j].configs, &grp->data[j].nconfigs);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int rockchip_pinctrl_parse_functions(struct device_node *np,
+						struct rockchip_pinctrl *info,
+						u32 index)
+{
+	struct device_node *child;
+	struct rockchip_pmx_func *func;
+	struct rockchip_pin_group *grp;
+	int ret;
+	static u32 grp_index;
+	u32 i = 0;
+
+	dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
+
+	func = &info->functions[index];
+
+	/* Initialise function */
+	func->name = np->name;
+	func->ngroups = of_get_child_count(np);
+	if (func->ngroups <= 0)
+		return 0;
+
+	func->groups = devm_kzalloc(info->dev,
+			func->ngroups * sizeof(char *), GFP_KERNEL);
+	if (!func->groups)
+		return -ENOMEM;
+
+	for_each_child_of_node(np, child) {
+		func->groups[i] = child->name;
+		grp = &info->groups[grp_index++];
+		ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
+					      struct rockchip_pinctrl *info)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *child;
+	int ret;
+	int i;
+
+	rockchip_pinctrl_child_count(info, np);
+
+	dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
+	dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
+
+	info->functions = devm_kzalloc(dev, info->nfunctions *
+					      sizeof(struct rockchip_pmx_func),
+					      GFP_KERNEL);
+	if (!info->functions) {
+		dev_err(dev, "failed to allocate memory for function list\n");
+		return -EINVAL;
+	}
+
+	info->groups = devm_kzalloc(dev, info->ngroups *
+					    sizeof(struct rockchip_pin_group),
+					    GFP_KERNEL);
+	if (!info->groups) {
+		dev_err(dev, "failed allocate memory for ping group list\n");
+		return -EINVAL;
+	}
+
+	i = 0;
+
+	for_each_child_of_node(np, child) {
+		if (of_match_node(rockchip_bank_match, child))
+			continue;
+
+		ret = rockchip_pinctrl_parse_functions(child, info, i++);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to parse function\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int rockchip_pinctrl_register(struct platform_device *pdev,
+					struct rockchip_pinctrl *info)
+{
+	struct pinctrl_desc *ctrldesc = &info->pctl;
+	struct pinctrl_pin_desc *pindesc, *pdesc;
+	struct rockchip_pin_bank *pin_bank;
+	int pin, bank, ret;
+	int k;
+
+	ctrldesc->name = "rockchip-pinctrl";
+	ctrldesc->owner = THIS_MODULE;
+	ctrldesc->pctlops = &rockchip_pctrl_ops;
+	ctrldesc->pmxops = &rockchip_pmx_ops;
+	ctrldesc->confops = &rockchip_pinconf_ops;
+
+	pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
+			info->ctrl->nr_pins, GFP_KERNEL);
+	if (!pindesc) {
+		dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
+		return -ENOMEM;
+	}
+	ctrldesc->pins = pindesc;
+	ctrldesc->npins = info->ctrl->nr_pins;
+
+	pdesc = pindesc;
+	for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
+		pin_bank = &info->ctrl->pin_banks[bank];
+		for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
+			pdesc->number = k;
+			pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
+						pin_bank->name, pin);
+			pdesc++;
+		}
+	}
+
+	ret = rockchip_pinctrl_parse_dt(pdev, info);
+	if (ret)
+		return ret;
+
+	info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
+	if (!info->pctl_dev) {
+		dev_err(&pdev->dev, "could not register pinctrl driver\n");
+		return -EINVAL;
+	}
+
+	for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
+		pin_bank = &info->ctrl->pin_banks[bank];
+		pin_bank->grange.name = pin_bank->name;
+		pin_bank->grange.id = bank;
+		pin_bank->grange.pin_base = pin_bank->pin_base;
+		pin_bank->grange.base = pin_bank->gpio_chip.base;
+		pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
+		pin_bank->grange.gc = &pin_bank->gpio_chip;
+		pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
+	}
+
+	return 0;
+}
+
+/*
+ * GPIO handling
+ */
+
+static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	pinctrl_free_gpio(chip->base + offset);
+}
+
+static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
+{
+	struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
+	void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
+	unsigned long flags;
+	u32 data;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	data = readl(reg);
+	data &= ~BIT(offset);
+	if (value)
+		data |= BIT(offset);
+	writel(data, reg);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+}
+
+/*
+ * Returns the level of the pin for input direction and setting of the DR
+ * register for output gpios.
+ */
+static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+	struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
+	u32 data;
+
+	data = readl(bank->reg_base + GPIO_EXT_PORT);
+	data >>= offset;
+	data &= 1;
+	return data;
+}
+
+/*
+ * gpiolib gpio_direction_input callback function. The setting of the pin
+ * mux function as 'gpio input' will be handled by the pinctrl susbsystem
+ * interface.
+ */
+static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+	return pinctrl_gpio_direction_input(gc->base + offset);
+}
+
+/*
+ * gpiolib gpio_direction_output callback function. The setting of the pin
+ * mux function as 'gpio output' will be handled by the pinctrl susbsystem
+ * interface.
+ */
+static int rockchip_gpio_direction_output(struct gpio_chip *gc,
+					  unsigned offset, int value)
+{
+	rockchip_gpio_set(gc, offset, value);
+	return pinctrl_gpio_direction_output(gc->base + offset);
+}
+
+/*
+ * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
+ * and a virtual IRQ, if not already present.
+ */
+static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
+	unsigned int virq;
+
+	if (!bank->domain)
+		return -ENXIO;
+
+	virq = irq_create_mapping(bank->domain, offset);
+
+	return (virq) ? : -ENXIO;
+}
+
+static const struct gpio_chip rockchip_gpiolib_chip = {
+	.request = rockchip_gpio_request,
+	.free = rockchip_gpio_free,
+	.set = rockchip_gpio_set,
+	.get = rockchip_gpio_get,
+	.direction_input = rockchip_gpio_direction_input,
+	.direction_output = rockchip_gpio_direction_output,
+	.to_irq = rockchip_gpio_to_irq,
+	.owner = THIS_MODULE,
+};
+
+/*
+ * Interrupt handling
+ */
+
+static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
+{
+	struct irq_chip *chip = irq_get_chip(irq);
+	struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
+	u32 pend;
+
+	dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
+
+	chained_irq_enter(chip, desc);
+
+	pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
+
+	while (pend) {
+		unsigned int virq;
+
+		irq = __ffs(pend);
+		pend &= ~BIT(irq);
+		virq = irq_linear_revmap(bank->domain, irq);
+
+		if (!virq) {
+			dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
+			continue;
+		}
+
+		dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
+
+		/*
+		 * Triggering IRQ on both rising and falling edge
+		 * needs manual intervention.
+		 */
+		if (bank->toggle_edge_mode & BIT(irq)) {
+			u32 data, data_old, polarity;
+			unsigned long flags;
+
+			data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
+			do {
+				spin_lock_irqsave(&bank->slock, flags);
+
+				polarity = readl_relaxed(bank->reg_base +
+							 GPIO_INT_POLARITY);
+				if (data & BIT(irq))
+					polarity &= ~BIT(irq);
+				else
+					polarity |= BIT(irq);
+				writel(polarity,
+				       bank->reg_base + GPIO_INT_POLARITY);
+
+				spin_unlock_irqrestore(&bank->slock, flags);
+
+				data_old = data;
+				data = readl_relaxed(bank->reg_base +
+						     GPIO_EXT_PORT);
+			} while ((data & BIT(irq)) != (data_old & BIT(irq)));
+		}
+
+		generic_handle_irq(virq);
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct rockchip_pin_bank *bank = gc->private;
+	u32 mask = BIT(d->hwirq);
+	u32 polarity;
+	u32 level;
+	u32 data;
+	unsigned long flags;
+	int ret;
+
+	/* make sure the pin is configured as gpio input */
+	ret = rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
+	if (ret < 0)
+		return ret;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+	data &= ~mask;
+	writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	if (type & IRQ_TYPE_EDGE_BOTH)
+		__irq_set_handler_locked(d->irq, handle_edge_irq);
+	else
+		__irq_set_handler_locked(d->irq, handle_level_irq);
+
+	spin_lock_irqsave(&bank->slock, flags);
+	irq_gc_lock(gc);
+
+	level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
+	polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
+
+	switch (type) {
+	case IRQ_TYPE_EDGE_BOTH:
+		bank->toggle_edge_mode |= mask;
+		level |= mask;
+
+		/*
+		 * Determine gpio state. If 1 next interrupt should be falling
+		 * otherwise rising.
+		 */
+		data = readl(bank->reg_base + GPIO_EXT_PORT);
+		if (data & mask)
+			polarity &= ~mask;
+		else
+			polarity |= mask;
+		break;
+	case IRQ_TYPE_EDGE_RISING:
+		bank->toggle_edge_mode &= ~mask;
+		level |= mask;
+		polarity |= mask;
+		break;
+	case IRQ_TYPE_EDGE_FALLING:
+		bank->toggle_edge_mode &= ~mask;
+		level |= mask;
+		polarity &= ~mask;
+		break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		bank->toggle_edge_mode &= ~mask;
+		level &= ~mask;
+		polarity |= mask;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		bank->toggle_edge_mode &= ~mask;
+		level &= ~mask;
+		polarity &= ~mask;
+		break;
+	default:
+		irq_gc_unlock(gc);
+		spin_unlock_irqrestore(&bank->slock, flags);
+		return -EINVAL;
+	}
+
+	writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
+	writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
+
+	irq_gc_unlock(gc);
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	return 0;
+}
+
+static void rockchip_irq_suspend(struct irq_data *d)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct rockchip_pin_bank *bank = gc->private;
+
+	bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
+	irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
+}
+
+static void rockchip_irq_resume(struct irq_data *d)
+{
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct rockchip_pin_bank *bank = gc->private;
+
+	irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
+}
+
+static int rockchip_interrupts_register(struct platform_device *pdev,
+						struct rockchip_pinctrl *info)
+{
+	struct rockchip_pin_ctrl *ctrl = info->ctrl;
+	struct rockchip_pin_bank *bank = ctrl->pin_banks;
+	unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
+	struct irq_chip_generic *gc;
+	int ret;
+	int i;
+
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+		if (!bank->valid) {
+			dev_warn(&pdev->dev, "bank %s is not valid\n",
+				 bank->name);
+			continue;
+		}
+
+		bank->domain = irq_domain_add_linear(bank->of_node, 32,
+						&irq_generic_chip_ops, NULL);
+		if (!bank->domain) {
+			dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
+				 bank->name);
+			continue;
+		}
+
+		ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
+					 "rockchip_gpio_irq", handle_level_irq,
+					 clr, 0, IRQ_GC_INIT_MASK_CACHE);
+		if (ret) {
+			dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
+				bank->name);
+			irq_domain_remove(bank->domain);
+			continue;
+		}
+
+		/*
+		 * Linux assumes that all interrupts start out disabled/masked.
+		 * Our driver only uses the concept of masked and always keeps
+		 * things enabled, so for us that's all masked and all enabled.
+		 */
+		writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK);
+		writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN);
+
+		gc = irq_get_domain_generic_chip(bank->domain, 0);
+		gc->reg_base = bank->reg_base;
+		gc->private = bank;
+		gc->chip_types[0].regs.mask = GPIO_INTMASK;
+		gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
+		gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
+		gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit;
+		gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit;
+		gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
+		gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend;
+		gc->chip_types[0].chip.irq_resume = rockchip_irq_resume;
+		gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
+		gc->wake_enabled = IRQ_MSK(bank->nr_pins);
+
+		irq_set_handler_data(bank->irq, bank);
+		irq_set_chained_handler(bank->irq, rockchip_irq_demux);
+	}
+
+	return 0;
+}
+
+static int rockchip_gpiolib_register(struct platform_device *pdev,
+						struct rockchip_pinctrl *info)
+{
+	struct rockchip_pin_ctrl *ctrl = info->ctrl;
+	struct rockchip_pin_bank *bank = ctrl->pin_banks;
+	struct gpio_chip *gc;
+	int ret;
+	int i;
+
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+		if (!bank->valid) {
+			dev_warn(&pdev->dev, "bank %s is not valid\n",
+				 bank->name);
+			continue;
+		}
+
+		bank->gpio_chip = rockchip_gpiolib_chip;
+
+		gc = &bank->gpio_chip;
+		gc->base = bank->pin_base;
+		gc->ngpio = bank->nr_pins;
+		gc->dev = &pdev->dev;
+		gc->of_node = bank->of_node;
+		gc->label = bank->name;
+
+		ret = gpiochip_add(gc);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
+							gc->label, ret);
+			goto fail;
+		}
+	}
+
+	rockchip_interrupts_register(pdev, info);
+
+	return 0;
+
+fail:
+	for (--i, --bank; i >= 0; --i, --bank) {
+		if (!bank->valid)
+			continue;
+		gpiochip_remove(&bank->gpio_chip);
+	}
+	return ret;
+}
+
+static int rockchip_gpiolib_unregister(struct platform_device *pdev,
+						struct rockchip_pinctrl *info)
+{
+	struct rockchip_pin_ctrl *ctrl = info->ctrl;
+	struct rockchip_pin_bank *bank = ctrl->pin_banks;
+	int i;
+
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+		if (!bank->valid)
+			continue;
+		gpiochip_remove(&bank->gpio_chip);
+	}
+
+	return 0;
+}
+
+static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
+				  struct rockchip_pinctrl *info)
+{
+	struct resource res;
+	void __iomem *base;
+
+	if (of_address_to_resource(bank->of_node, 0, &res)) {
+		dev_err(info->dev, "cannot find IO resource for bank\n");
+		return -ENOENT;
+	}
+
+	bank->reg_base = devm_ioremap_resource(info->dev, &res);
+	if (IS_ERR(bank->reg_base))
+		return PTR_ERR(bank->reg_base);
+
+	/*
+	 * special case, where parts of the pull setting-registers are
+	 * part of the PMU register space
+	 */
+	if (of_device_is_compatible(bank->of_node,
+				    "rockchip,rk3188-gpio-bank0")) {
+		struct device_node *node;
+
+		node = of_parse_phandle(bank->of_node->parent,
+					"rockchip,pmu", 0);
+		if (!node) {
+			if (of_address_to_resource(bank->of_node, 1, &res)) {
+				dev_err(info->dev, "cannot find IO resource for bank\n");
+				return -ENOENT;
+			}
+
+			base = devm_ioremap_resource(info->dev, &res);
+			if (IS_ERR(base))
+				return PTR_ERR(base);
+			rockchip_regmap_config.max_register =
+						    resource_size(&res) - 4;
+			rockchip_regmap_config.name =
+					    "rockchip,rk3188-gpio-bank0-pull";
+			bank->regmap_pull = devm_regmap_init_mmio(info->dev,
+						    base,
+						    &rockchip_regmap_config);
+		}
+	}
+
+	bank->irq = irq_of_parse_and_map(bank->of_node, 0);
+
+	bank->clk = of_clk_get(bank->of_node, 0);
+	if (IS_ERR(bank->clk))
+		return PTR_ERR(bank->clk);
+
+	return clk_prepare_enable(bank->clk);
+}
+
+static const struct of_device_id rockchip_pinctrl_dt_match[];
+
+/* retrieve the soc specific data */
+static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
+						struct rockchip_pinctrl *d,
+						struct platform_device *pdev)
+{
+	const struct of_device_id *match;
+	struct device_node *node = pdev->dev.of_node;
+	struct device_node *np;
+	struct rockchip_pin_ctrl *ctrl;
+	struct rockchip_pin_bank *bank;
+	int grf_offs, pmu_offs, i, j;
+
+	match = of_match_node(rockchip_pinctrl_dt_match, node);
+	ctrl = (struct rockchip_pin_ctrl *)match->data;
+
+	for_each_child_of_node(node, np) {
+		if (!of_find_property(np, "gpio-controller", NULL))
+			continue;
+
+		bank = ctrl->pin_banks;
+		for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+			if (!strcmp(bank->name, np->name)) {
+				bank->of_node = np;
+
+				if (!rockchip_get_bank_data(bank, d))
+					bank->valid = true;
+
+				break;
+			}
+		}
+	}
+
+	grf_offs = ctrl->grf_mux_offset;
+	pmu_offs = ctrl->pmu_mux_offset;
+	bank = ctrl->pin_banks;
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+		int bank_pins = 0;
+
+		spin_lock_init(&bank->slock);
+		bank->drvdata = d;
+		bank->pin_base = ctrl->nr_pins;
+		ctrl->nr_pins += bank->nr_pins;
+
+		/* calculate iomux offsets */
+		for (j = 0; j < 4; j++) {
+			struct rockchip_iomux *iom = &bank->iomux[j];
+			int inc;
+
+			if (bank_pins >= bank->nr_pins)
+				break;
+
+			/* preset offset value, set new start value */
+			if (iom->offset >= 0) {
+				if (iom->type & IOMUX_SOURCE_PMU)
+					pmu_offs = iom->offset;
+				else
+					grf_offs = iom->offset;
+			} else { /* set current offset */
+				iom->offset = (iom->type & IOMUX_SOURCE_PMU) ?
+							pmu_offs : grf_offs;
+			}
+
+			dev_dbg(d->dev, "bank %d, iomux %d has offset 0x%x\n",
+				 i, j, iom->offset);
+
+			/*
+			 * Increase offset according to iomux width.
+			 * 4bit iomux'es are spread over two registers.
+			 */
+			inc = (iom->type & IOMUX_WIDTH_4BIT) ? 8 : 4;
+			if (iom->type & IOMUX_SOURCE_PMU)
+				pmu_offs += inc;
+			else
+				grf_offs += inc;
+
+			bank_pins += 8;
+		}
+	}
+
+	return ctrl;
+}
+
+#define RK3288_GRF_GPIO6C_IOMUX		0x64
+#define GPIO6C6_SEL_WRITE_ENABLE	BIT(28)
+
+static u32 rk3288_grf_gpio6c_iomux;
+
+static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev)
+{
+	struct rockchip_pinctrl *info = dev_get_drvdata(dev);
+	int ret = pinctrl_force_sleep(info->pctl_dev);
+
+	if (ret)
+		return ret;
+
+	/*
+	 * RK3288 GPIO6_C6 mux would be modified by Maskrom when resume, so save
+	 * the setting here, and restore it at resume.
+	 */
+	if (info->ctrl->type == RK3288) {
+		ret = regmap_read(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
+				  &rk3288_grf_gpio6c_iomux);
+		if (ret) {
+			pinctrl_force_default(info->pctl_dev);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
+{
+	struct rockchip_pinctrl *info = dev_get_drvdata(dev);
+	int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
+			       rk3288_grf_gpio6c_iomux |
+			       GPIO6C6_SEL_WRITE_ENABLE);
+
+	if (ret)
+		return ret;
+
+	return pinctrl_force_default(info->pctl_dev);
+}
+
+static SIMPLE_DEV_PM_OPS(rockchip_pinctrl_dev_pm_ops, rockchip_pinctrl_suspend,
+			 rockchip_pinctrl_resume);
+
+static int rockchip_pinctrl_probe(struct platform_device *pdev)
+{
+	struct rockchip_pinctrl *info;
+	struct device *dev = &pdev->dev;
+	struct rockchip_pin_ctrl *ctrl;
+	struct device_node *np = pdev->dev.of_node, *node;
+	struct resource *res;
+	void __iomem *base;
+	int ret;
+
+	if (!dev->of_node) {
+		dev_err(dev, "device tree node not found\n");
+		return -ENODEV;
+	}
+
+	info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->dev = dev;
+
+	ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
+	if (!ctrl) {
+		dev_err(dev, "driver data not available\n");
+		return -EINVAL;
+	}
+	info->ctrl = ctrl;
+
+	node = of_parse_phandle(np, "rockchip,grf", 0);
+	if (node) {
+		info->regmap_base = syscon_node_to_regmap(node);
+		if (IS_ERR(info->regmap_base))
+			return PTR_ERR(info->regmap_base);
+	} else {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		base = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(base))
+			return PTR_ERR(base);
+
+		rockchip_regmap_config.max_register = resource_size(res) - 4;
+		rockchip_regmap_config.name = "rockchip,pinctrl";
+		info->regmap_base = devm_regmap_init_mmio(&pdev->dev, base,
+						    &rockchip_regmap_config);
+
+		/* to check for the old dt-bindings */
+		info->reg_size = resource_size(res);
+
+		/* Honor the old binding, with pull registers as 2nd resource */
+		if (ctrl->type == RK3188 && info->reg_size < 0x200) {
+			res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+			base = devm_ioremap_resource(&pdev->dev, res);
+			if (IS_ERR(base))
+				return PTR_ERR(base);
+
+			rockchip_regmap_config.max_register =
+							resource_size(res) - 4;
+			rockchip_regmap_config.name = "rockchip,pinctrl-pull";
+			info->regmap_pull = devm_regmap_init_mmio(&pdev->dev,
+						    base,
+						    &rockchip_regmap_config);
+		}
+	}
+
+	/* try to find the optional reference to the pmu syscon */
+	node = of_parse_phandle(np, "rockchip,pmu", 0);
+	if (node) {
+		info->regmap_pmu = syscon_node_to_regmap(node);
+		if (IS_ERR(info->regmap_pmu))
+			return PTR_ERR(info->regmap_pmu);
+	}
+
+	ret = rockchip_gpiolib_register(pdev, info);
+	if (ret)
+		return ret;
+
+	ret = rockchip_pinctrl_register(pdev, info);
+	if (ret) {
+		rockchip_gpiolib_unregister(pdev, info);
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, info);
+
+	return 0;
+}
+
+static struct rockchip_pin_bank rk2928_pin_banks[] = {
+	PIN_BANK(0, 32, "gpio0"),
+	PIN_BANK(1, 32, "gpio1"),
+	PIN_BANK(2, 32, "gpio2"),
+	PIN_BANK(3, 32, "gpio3"),
+};
+
+static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
+		.pin_banks		= rk2928_pin_banks,
+		.nr_banks		= ARRAY_SIZE(rk2928_pin_banks),
+		.label			= "RK2928-GPIO",
+		.type			= RK2928,
+		.grf_mux_offset		= 0xa8,
+		.pull_calc_reg		= rk2928_calc_pull_reg_and_bit,
+};
+
+static struct rockchip_pin_bank rk3066a_pin_banks[] = {
+	PIN_BANK(0, 32, "gpio0"),
+	PIN_BANK(1, 32, "gpio1"),
+	PIN_BANK(2, 32, "gpio2"),
+	PIN_BANK(3, 32, "gpio3"),
+	PIN_BANK(4, 32, "gpio4"),
+	PIN_BANK(6, 16, "gpio6"),
+};
+
+static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
+		.pin_banks		= rk3066a_pin_banks,
+		.nr_banks		= ARRAY_SIZE(rk3066a_pin_banks),
+		.label			= "RK3066a-GPIO",
+		.type			= RK2928,
+		.grf_mux_offset		= 0xa8,
+		.pull_calc_reg		= rk2928_calc_pull_reg_and_bit,
+};
+
+static struct rockchip_pin_bank rk3066b_pin_banks[] = {
+	PIN_BANK(0, 32, "gpio0"),
+	PIN_BANK(1, 32, "gpio1"),
+	PIN_BANK(2, 32, "gpio2"),
+	PIN_BANK(3, 32, "gpio3"),
+};
+
+static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
+		.pin_banks	= rk3066b_pin_banks,
+		.nr_banks	= ARRAY_SIZE(rk3066b_pin_banks),
+		.label		= "RK3066b-GPIO",
+		.type		= RK3066B,
+		.grf_mux_offset	= 0x60,
+};
+
+static struct rockchip_pin_bank rk3188_pin_banks[] = {
+	PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_GPIO_ONLY, 0, 0, 0),
+	PIN_BANK(1, 32, "gpio1"),
+	PIN_BANK(2, 32, "gpio2"),
+	PIN_BANK(3, 32, "gpio3"),
+};
+
+static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
+		.pin_banks		= rk3188_pin_banks,
+		.nr_banks		= ARRAY_SIZE(rk3188_pin_banks),
+		.label			= "RK3188-GPIO",
+		.type			= RK3188,
+		.grf_mux_offset		= 0x60,
+		.pull_calc_reg		= rk3188_calc_pull_reg_and_bit,
+};
+
+static struct rockchip_pin_bank rk3288_pin_banks[] = {
+	PIN_BANK_IOMUX_FLAGS(0, 24, "gpio0", IOMUX_SOURCE_PMU,
+					     IOMUX_SOURCE_PMU,
+					     IOMUX_SOURCE_PMU,
+					     IOMUX_UNROUTED
+			    ),
+	PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", IOMUX_UNROUTED,
+					     IOMUX_UNROUTED,
+					     IOMUX_UNROUTED,
+					     0
+			    ),
+	PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0, 0, 0, IOMUX_UNROUTED),
+	PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3", 0, 0, 0, IOMUX_WIDTH_4BIT),
+	PIN_BANK_IOMUX_FLAGS(4, 32, "gpio4", IOMUX_WIDTH_4BIT,
+					     IOMUX_WIDTH_4BIT,
+					     0,
+					     0
+			    ),
+	PIN_BANK_IOMUX_FLAGS(5, 32, "gpio5", IOMUX_UNROUTED,
+					     0,
+					     0,
+					     IOMUX_UNROUTED
+			    ),
+	PIN_BANK_IOMUX_FLAGS(6, 32, "gpio6", 0, 0, 0, IOMUX_UNROUTED),
+	PIN_BANK_IOMUX_FLAGS(7, 32, "gpio7", 0,
+					     0,
+					     IOMUX_WIDTH_4BIT,
+					     IOMUX_UNROUTED
+			    ),
+	PIN_BANK(8, 16, "gpio8"),
+};
+
+static struct rockchip_pin_ctrl rk3288_pin_ctrl = {
+		.pin_banks		= rk3288_pin_banks,
+		.nr_banks		= ARRAY_SIZE(rk3288_pin_banks),
+		.label			= "RK3288-GPIO",
+		.type			= RK3288,
+		.grf_mux_offset		= 0x0,
+		.pmu_mux_offset		= 0x84,
+		.pull_calc_reg		= rk3288_calc_pull_reg_and_bit,
+};
+
+static const struct of_device_id rockchip_pinctrl_dt_match[] = {
+	{ .compatible = "rockchip,rk2928-pinctrl",
+		.data = (void *)&rk2928_pin_ctrl },
+	{ .compatible = "rockchip,rk3066a-pinctrl",
+		.data = (void *)&rk3066a_pin_ctrl },
+	{ .compatible = "rockchip,rk3066b-pinctrl",
+		.data = (void *)&rk3066b_pin_ctrl },
+	{ .compatible = "rockchip,rk3188-pinctrl",
+		.data = (void *)&rk3188_pin_ctrl },
+	{ .compatible = "rockchip,rk3288-pinctrl",
+		.data = (void *)&rk3288_pin_ctrl },
+	{},
+};
+MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
+
+static struct platform_driver rockchip_pinctrl_driver = {
+	.probe		= rockchip_pinctrl_probe,
+	.driver = {
+		.name	= "rockchip-pinctrl",
+		.pm = &rockchip_pinctrl_dev_pm_ops,
+		.of_match_table = rockchip_pinctrl_dt_match,
+	},
+};
+
+static int __init rockchip_pinctrl_drv_register(void)
+{
+	return platform_driver_register(&rockchip_pinctrl_driver);
+}
+postcore_initcall(rockchip_pinctrl_drv_register);
+
+MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
+MODULE_DESCRIPTION("Rockchip pinctrl driver");
+MODULE_LICENSE("GPL v2");