pinctrl: sprd: Add Spreadtrum pin control driver

This patch adds the pin control driver for Spreadtrum SC9860 platform.

Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 1113 insertions, 0 deletions

diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c
new file mode 100644
index 000000000000..7e7b9ac7e836
--- /dev/null
+++ b/drivers/pinctrl/sprd/pinctrl-sprd.c
@@ -0,0 +1,1113 @@
+/*
+ * Spreadtrum pin controller driver
+ * Copyright (C) 2017 Spreadtrum  - http://www.spreadtrum.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/debugfs.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/slab.h>
+
+#include "../core.h"
+#include "../pinmux.h"
+#include "../pinconf.h"
+#include "../pinctrl-utils.h"
+#include "pinctrl-sprd.h"
+
+#define PINCTRL_BIT_MASK(width)		(~(~0UL << (width)))
+#define PINCTRL_REG_OFFSET		0x20
+#define PINCTRL_REG_MISC_OFFSET		0x4020
+#define PINCTRL_REG_LEN			0x4
+
+#define PIN_FUNC_MASK			(BIT(4) | BIT(5))
+#define PIN_FUNC_SEL_1			~PIN_FUNC_MASK
+#define PIN_FUNC_SEL_2			BIT(4)
+#define PIN_FUNC_SEL_3			BIT(5)
+#define PIN_FUNC_SEL_4			PIN_FUNC_MASK
+
+#define AP_SLEEP_MODE			BIT(13)
+#define PUBCP_SLEEP_MODE		BIT(14)
+#define TGLDSP_SLEEP_MODE		BIT(15)
+#define AGDSP_SLEEP_MODE		BIT(16)
+#define SLEEP_MODE_MASK			GENMASK(3, 0)
+#define SLEEP_MODE_SHIFT		13
+
+#define SLEEP_INPUT			BIT(1)
+#define SLEEP_INPUT_MASK		0x1
+#define SLEEP_INPUT_SHIFT		1
+
+#define SLEEP_OUTPUT			BIT(0)
+#define SLEEP_OUTPUT_MASK		0x1
+#define SLEEP_OUTPUT_SHIFT		0
+
+#define DRIVE_STRENGTH_MASK		GENMASK(3, 0)
+#define DRIVE_STRENGTH_SHIFT		19
+
+#define SLEEP_PULL_DOWN			BIT(2)
+#define SLEEP_PULL_DOWN_MASK		0x1
+#define SLEEP_PULL_DOWN_SHIFT		2
+
+#define PULL_DOWN			BIT(6)
+#define PULL_DOWN_MASK			0x1
+#define PULL_DOWN_SHIFT			6
+
+#define SLEEP_PULL_UP			BIT(3)
+#define SLEEP_PULL_UP_MASK		0x1
+#define SLEEP_PULL_UP_SHIFT		3
+
+#define PULL_UP_20K			(BIT(12) | BIT(7))
+#define PULL_UP_4_7K			BIT(12)
+#define PULL_UP_MASK			0x21
+#define PULL_UP_SHIFT			7
+
+#define INPUT_SCHMITT			BIT(11)
+#define INPUT_SCHMITT_MASK		0x1
+#define INPUT_SCHMITT_SHIFT		11
+
+enum pin_sleep_mode {
+	AP_SLEEP = BIT(0),
+	PUBCP_SLEEP = BIT(1),
+	TGLDSP_SLEEP = BIT(2),
+	AGDSP_SLEEP = BIT(3),
+};
+
+enum pin_func_sel {
+	PIN_FUNC_1,
+	PIN_FUNC_2,
+	PIN_FUNC_3,
+	PIN_FUNC_4,
+	PIN_FUNC_MAX,
+};
+
+/**
+ * struct sprd_pin: represent one pin's description
+ * @name: pin name
+ * @number: pin number
+ * @type: pin type, can be GLOBAL_CTRL_PIN/COMMON_PIN/MISC_PIN
+ * @reg: pin register address
+ * @bit_offset: bit offset in pin register
+ * @bit_width: bit width in pin register
+ */
+struct sprd_pin {
+	const char *name;
+	unsigned int number;
+	enum pin_type type;
+	unsigned long reg;
+	unsigned long bit_offset;
+	unsigned long bit_width;
+};
+
+/**
+ * struct sprd_pin_group: represent one group's description
+ * @name: group name
+ * @npins: pin numbers of this group
+ * @pins: pointer to pins array
+ */
+struct sprd_pin_group {
+	const char *name;
+	unsigned int npins;
+	unsigned int *pins;
+};
+
+/**
+ * struct sprd_pinctrl_soc_info: represent the SoC's pins description
+ * @groups: pointer to groups of pins
+ * @ngroups: group numbers of the whole SoC
+ * @pins: pointer to pins description
+ * @npins: pin numbers of the whole SoC
+ * @grp_names: pointer to group names array
+ */
+struct sprd_pinctrl_soc_info {
+	struct sprd_pin_group *groups;
+	unsigned int ngroups;
+	struct sprd_pin *pins;
+	unsigned int npins;
+	const char **grp_names;
+};
+
+/**
+ * struct sprd_pinctrl: represent the pin controller device
+ * @dev: pointer to the device structure
+ * @pctl: pointer to the pinctrl handle
+ * @base: base address of the controller
+ * @info: pointer to SoC's pins description information
+ */
+struct sprd_pinctrl {
+	struct device *dev;
+	struct pinctrl_dev *pctl;
+	void __iomem *base;
+	struct sprd_pinctrl_soc_info *info;
+};
+
+enum sprd_pinconf_params {
+	SPRD_PIN_CONFIG_CONTROL = PIN_CONFIG_END + 1,
+	SPRD_PIN_CONFIG_SLEEP_MODE = PIN_CONFIG_END + 2,
+};
+
+static int sprd_pinctrl_get_id_by_name(struct sprd_pinctrl *sprd_pctl,
+				       const char *name)
+{
+	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;
+	int i;
+
+	for (i = 0; i < info->npins; i++) {
+		if (!strcmp(info->pins[i].name, name))
+			return info->pins[i].number;
+	}
+
+	return -ENODEV;
+}
+
+static struct sprd_pin *
+sprd_pinctrl_get_pin_by_id(struct sprd_pinctrl *sprd_pctl, unsigned int id)
+{
+	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;
+	struct sprd_pin *pin = NULL;
+	int i;
+
+	for (i = 0; i < info->npins; i++) {
+		if (info->pins[i].number == id) {
+			pin = &info->pins[i];
+			break;
+		}
+	}
+
+	return pin;
+}
+
+static const struct sprd_pin_group *
+sprd_pinctrl_find_group_by_name(struct sprd_pinctrl *sprd_pctl,
+				const char *name)
+{
+	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;
+	const struct sprd_pin_group *grp = NULL;
+	int i;
+
+	for (i = 0; i < info->ngroups; i++) {
+		if (!strcmp(info->groups[i].name, name)) {
+			grp = &info->groups[i];
+			break;
+		}
+	}
+
+	return grp;
+}
+
+static int sprd_pctrl_group_count(struct pinctrl_dev *pctldev)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+
+	return info->ngroups;
+}
+
+static const char *sprd_pctrl_group_name(struct pinctrl_dev *pctldev,
+					 unsigned int selector)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+
+	return info->groups[selector].name;
+}
+
+static int sprd_pctrl_group_pins(struct pinctrl_dev *pctldev,
+				 unsigned int selector,
+				 const unsigned int **pins,
+				 unsigned int *npins)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+
+	if (selector >= info->ngroups)
+		return -EINVAL;
+
+	*pins = info->groups[selector].pins;
+	*npins = info->groups[selector].npins;
+
+	return 0;
+}
+
+static int sprd_dt_node_to_map(struct pinctrl_dev *pctldev,
+			       struct device_node *np,
+			       struct pinctrl_map **map,
+			       unsigned int *num_maps)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	const struct sprd_pin_group *grp;
+	unsigned long *configs = NULL;
+	unsigned int num_configs = 0;
+	unsigned int reserved_maps = 0;
+	unsigned int reserve = 0;
+	const char *function;
+	enum pinctrl_map_type type;
+	int ret;
+
+	grp = sprd_pinctrl_find_group_by_name(pctl, np->name);
+	if (!grp) {
+		dev_err(pctl->dev, "unable to find group for node %s\n",
+			of_node_full_name(np));
+		return -EINVAL;
+	}
+
+	ret = of_property_count_strings(np, "pins");
+	if (ret < 0)
+		return ret;
+
+	if (ret == 1)
+		type = PIN_MAP_TYPE_CONFIGS_PIN;
+	else
+		type = PIN_MAP_TYPE_CONFIGS_GROUP;
+
+	ret = of_property_read_string(np, "function", &function);
+	if (ret < 0) {
+		if (ret != -EINVAL)
+			dev_err(pctl->dev,
+				"%s: could not parse property function\n",
+				of_node_full_name(np));
+		function = NULL;
+	}
+
+	ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
+					      &num_configs);
+	if (ret < 0) {
+		dev_err(pctl->dev, "%s: could not parse node property\n",
+			of_node_full_name(np));
+		return ret;
+	}
+
+	*map = NULL;
+	*num_maps = 0;
+
+	if (function != NULL)
+		reserve++;
+	if (num_configs)
+		reserve++;
+
+	ret = pinctrl_utils_reserve_map(pctldev, map, &reserved_maps,
+					num_maps, reserve);
+	if (ret < 0)
+		goto out;
+
+	if (function) {
+		ret = pinctrl_utils_add_map_mux(pctldev, map,
+						&reserved_maps, num_maps,
+						grp->name, function);
+		if (ret < 0)
+			goto out;
+	}
+
+	if (num_configs) {
+		const char *group_or_pin;
+		unsigned int pin_id;
+
+		if (type == PIN_MAP_TYPE_CONFIGS_PIN) {
+			pin_id = grp->pins[0];
+			group_or_pin = pin_get_name(pctldev, pin_id);
+		} else {
+			group_or_pin = grp->name;
+		}
+
+		ret = pinctrl_utils_add_map_configs(pctldev, map,
+						    &reserved_maps, num_maps,
+						    group_or_pin, configs,
+						    num_configs, type);
+	}
+
+out:
+	kfree(configs);
+	return ret;
+}
+
+static void sprd_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+				unsigned int offset)
+{
+	seq_printf(s, "%s", dev_name(pctldev->dev));
+}
+
+static const struct pinctrl_ops sprd_pctrl_ops = {
+	.get_groups_count = sprd_pctrl_group_count,
+	.get_group_name = sprd_pctrl_group_name,
+	.get_group_pins = sprd_pctrl_group_pins,
+	.pin_dbg_show = sprd_pctrl_dbg_show,
+	.dt_node_to_map = sprd_dt_node_to_map,
+	.dt_free_map = pinctrl_utils_free_map,
+};
+
+int sprd_pmx_get_function_count(struct pinctrl_dev *pctldev)
+{
+	return PIN_FUNC_MAX;
+}
+
+const char *sprd_pmx_get_function_name(struct pinctrl_dev *pctldev,
+				       unsigned int selector)
+{
+	switch (selector) {
+	case PIN_FUNC_1:
+		return "func1";
+	case PIN_FUNC_2:
+		return "func2";
+	case PIN_FUNC_3:
+		return "func3";
+	case PIN_FUNC_4:
+		return "func4";
+	default:
+		return "null";
+	}
+}
+
+int sprd_pmx_get_function_groups(struct pinctrl_dev *pctldev,
+				 unsigned int selector,
+				 const char * const **groups,
+				 unsigned int * const num_groups)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+
+	*groups = info->grp_names;
+	*num_groups = info->ngroups;
+
+	return 0;
+}
+
+static int sprd_pmx_set_mux(struct pinctrl_dev *pctldev,
+			    unsigned int func_selector,
+			    unsigned int group_selector)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+	struct sprd_pin_group *grp = &info->groups[group_selector];
+	unsigned int i, grp_pins = grp->npins;
+	unsigned long reg;
+	unsigned int val = 0;
+
+	if (group_selector > info->ngroups)
+		return -EINVAL;
+
+	switch (func_selector) {
+	case PIN_FUNC_1:
+		val &= PIN_FUNC_SEL_1;
+		break;
+	case PIN_FUNC_2:
+		val |= PIN_FUNC_SEL_2;
+		break;
+	case PIN_FUNC_3:
+		val |= PIN_FUNC_SEL_3;
+		break;
+	case PIN_FUNC_4:
+		val |= PIN_FUNC_SEL_4;
+		break;
+	default:
+		break;
+	}
+
+	for (i = 0; i < grp_pins; i++) {
+		unsigned int pin_id = grp->pins[i];
+		struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);
+
+		if (!pin || pin->type != COMMON_PIN)
+			continue;
+
+		reg = readl((void __iomem *)pin->reg);
+		reg &= ~PIN_FUNC_MASK;
+		reg |= val;
+		writel(reg, (void __iomem *)pin->reg);
+	}
+
+	return 0;
+}
+
+static const struct pinmux_ops sprd_pmx_ops = {
+	.get_functions_count = sprd_pmx_get_function_count,
+	.get_function_name = sprd_pmx_get_function_name,
+	.get_function_groups = sprd_pmx_get_function_groups,
+	.set_mux = sprd_pmx_set_mux,
+};
+
+static int sprd_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin_id,
+			    unsigned long *config)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);
+	unsigned int param = pinconf_to_config_param(*config);
+	unsigned int reg, arg;
+
+	if (!pin)
+		return -EINVAL;
+
+	if (pin->type == GLOBAL_CTRL_PIN) {
+		reg = (readl((void __iomem *)pin->reg) >>
+			   pin->bit_offset) & PINCTRL_BIT_MASK(pin->bit_width);
+	} else {
+		reg = readl((void __iomem *)pin->reg);
+	}
+
+	if (pin->type == GLOBAL_CTRL_PIN &&
+	    param == SPRD_PIN_CONFIG_CONTROL) {
+		arg = reg;
+	} else if (pin->type == COMMON_PIN) {
+		switch (param) {
+		case SPRD_PIN_CONFIG_SLEEP_MODE:
+			arg = (reg >> SLEEP_MODE_SHIFT) & SLEEP_MODE_MASK;
+			break;
+		case PIN_CONFIG_INPUT_ENABLE:
+			arg = (reg >> SLEEP_INPUT_SHIFT) & SLEEP_INPUT_MASK;
+			break;
+		case PIN_CONFIG_OUTPUT:
+			arg = reg & SLEEP_OUTPUT_MASK;
+			break;
+		case PIN_CONFIG_SLEEP_HARDWARE_STATE:
+			arg = 0;
+			break;
+		default:
+			return -ENOTSUPP;
+		}
+	} else if (pin->type == MISC_PIN) {
+		switch (param) {
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			arg = (reg >> DRIVE_STRENGTH_SHIFT) &
+				DRIVE_STRENGTH_MASK;
+			break;
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			/* combine sleep pull down and pull down config */
+			arg = ((reg >> SLEEP_PULL_DOWN_SHIFT) &
+			       SLEEP_PULL_DOWN_MASK) << 16;
+			arg |= (reg >> PULL_DOWN_SHIFT) & PULL_DOWN_MASK;
+			break;
+		case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+			arg = (reg >> INPUT_SCHMITT_SHIFT) & INPUT_SCHMITT_MASK;
+			break;
+		case PIN_CONFIG_BIAS_PULL_UP:
+			/* combine sleep pull up and pull up config */
+			arg = ((reg >> SLEEP_PULL_UP_SHIFT) &
+			       SLEEP_PULL_UP_MASK) << 16;
+			arg |= (reg >> PULL_UP_SHIFT) & PULL_UP_MASK;
+			break;
+		case PIN_CONFIG_SLEEP_HARDWARE_STATE:
+			arg = 0;
+			break;
+		default:
+			return -ENOTSUPP;
+		}
+	} else {
+		return -ENOTSUPP;
+	}
+
+	*config = pinconf_to_config_packed(param, arg);
+	return 0;
+}
+
+static unsigned int sprd_pinconf_drive(unsigned int mA)
+{
+	unsigned int val = 0;
+
+	switch (mA) {
+	case 2:
+		break;
+	case 4:
+		val |= BIT(19);
+		break;
+	case 6:
+		val |= BIT(20);
+		break;
+	case 8:
+		val |= BIT(19) | BIT(20);
+		break;
+	case 10:
+		val |= BIT(21);
+		break;
+	case 12:
+		val |= BIT(21) | BIT(19);
+		break;
+	case 14:
+		val |= BIT(21) | BIT(20);
+		break;
+	case 16:
+		val |= BIT(19) | BIT(20) | BIT(21);
+		break;
+	case 20:
+		val |= BIT(22);
+		break;
+	case 21:
+		val |= BIT(22) | BIT(19);
+		break;
+	case 24:
+		val |= BIT(22) | BIT(20);
+		break;
+	case 25:
+		val |= BIT(22) | BIT(20) | BIT(19);
+		break;
+	case 27:
+		val |= BIT(22) | BIT(21);
+		break;
+	case 29:
+		val |= BIT(22) | BIT(21) | BIT(19);
+		break;
+	case 31:
+		val |= BIT(22) | BIT(21) | BIT(20);
+		break;
+	case 33:
+		val |= BIT(22) | BIT(21) | BIT(20) | BIT(19);
+		break;
+	default:
+		break;
+	}
+
+	return val;
+}
+
+static bool sprd_pinctrl_check_sleep_config(unsigned long *configs,
+					    unsigned int num_configs)
+{
+	unsigned int param;
+	int i;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		if (param == PIN_CONFIG_SLEEP_HARDWARE_STATE)
+			return true;
+	}
+
+	return false;
+}
+
+static int sprd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin_id,
+			    unsigned long *configs, unsigned int num_configs)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);
+	bool is_sleep_config;
+	unsigned long reg;
+	int i;
+
+	if (!pin)
+		return -EINVAL;
+
+	is_sleep_config = sprd_pinctrl_check_sleep_config(configs, num_configs);
+
+	for (i = 0; i < num_configs; i++) {
+		unsigned int param, arg, shift, mask, val;
+
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		val = 0;
+		shift = 0;
+		mask = 0;
+		if (pin->type == GLOBAL_CTRL_PIN &&
+		    param == SPRD_PIN_CONFIG_CONTROL) {
+			val = arg;
+		} else if (pin->type == COMMON_PIN) {
+			switch (param) {
+			case SPRD_PIN_CONFIG_SLEEP_MODE:
+				if (arg & AP_SLEEP)
+					val |= AP_SLEEP_MODE;
+				if (arg & PUBCP_SLEEP)
+					val |= PUBCP_SLEEP_MODE;
+				if (arg & TGLDSP_SLEEP)
+					val |= TGLDSP_SLEEP_MODE;
+				if (arg & AGDSP_SLEEP)
+					val |= AGDSP_SLEEP_MODE;
+
+				mask = SLEEP_MODE_MASK;
+				shift = SLEEP_MODE_SHIFT;
+				break;
+			case PIN_CONFIG_INPUT_ENABLE:
+				if (is_sleep_config == true) {
+					if (arg > 0)
+						val |= SLEEP_INPUT;
+					else
+						val &= ~SLEEP_INPUT;
+
+					mask = SLEEP_INPUT_MASK;
+					shift = SLEEP_INPUT_SHIFT;
+				}
+				break;
+			case PIN_CONFIG_OUTPUT:
+				if (is_sleep_config == true) {
+					val |= SLEEP_OUTPUT;
+					mask = SLEEP_OUTPUT_MASK;
+					shift = SLEEP_OUTPUT_SHIFT;
+				}
+				break;
+			case PIN_CONFIG_SLEEP_HARDWARE_STATE:
+				continue;
+			default:
+				return -ENOTSUPP;
+			}
+		} else if (pin->type == MISC_PIN) {
+			switch (param) {
+			case PIN_CONFIG_DRIVE_STRENGTH:
+				if (arg < 2 || arg > 60)
+					return -EINVAL;
+
+				val = sprd_pinconf_drive(arg);
+				mask = DRIVE_STRENGTH_MASK;
+				shift = DRIVE_STRENGTH_SHIFT;
+				break;
+			case PIN_CONFIG_BIAS_PULL_DOWN:
+				if (is_sleep_config == true) {
+					val |= SLEEP_PULL_DOWN;
+					mask = SLEEP_PULL_DOWN_MASK;
+					shift = SLEEP_PULL_DOWN_SHIFT;
+				} else {
+					val |= PULL_DOWN;
+					mask = PULL_DOWN_MASK;
+					shift = PULL_DOWN_SHIFT;
+				}
+				break;
+			case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+				if (arg > 0)
+					val |= INPUT_SCHMITT;
+				else
+					val &= ~INPUT_SCHMITT;
+
+				mask = INPUT_SCHMITT_MASK;
+				shift = INPUT_SCHMITT_SHIFT;
+				break;
+			case PIN_CONFIG_BIAS_PULL_UP:
+				if (is_sleep_config == true) {
+					val |= SLEEP_PULL_UP;
+					mask = SLEEP_PULL_UP_MASK;
+					shift = SLEEP_PULL_UP_SHIFT;
+				} else {
+					if (arg == 20000)
+						val |= PULL_UP_20K;
+					else if (arg == 4700)
+						val |= PULL_UP_4_7K;
+
+					mask = PULL_UP_MASK;
+					shift = PULL_UP_SHIFT;
+				}
+				break;
+			case PIN_CONFIG_SLEEP_HARDWARE_STATE:
+				continue;
+			default:
+				return -ENOTSUPP;
+			}
+		} else {
+			return -ENOTSUPP;
+		}
+
+		if (pin->type == GLOBAL_CTRL_PIN) {
+			reg = readl((void __iomem *)pin->reg);
+			reg &= ~(PINCTRL_BIT_MASK(pin->bit_width)
+				<< pin->bit_offset);
+			reg |= (val & PINCTRL_BIT_MASK(pin->bit_width))
+				<< pin->bit_offset;
+			writel(reg, (void __iomem *)pin->reg);
+		} else {
+			reg = readl((void __iomem *)pin->reg);
+			reg &= ~(mask << shift);
+			reg |= val;
+			writel(reg, (void __iomem *)pin->reg);
+		}
+	}
+
+	return 0;
+}
+
+static int sprd_pinconf_group_get(struct pinctrl_dev *pctldev,
+				  unsigned int selector, unsigned long *config)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+	struct sprd_pin_group *grp;
+	unsigned int pin_id;
+
+	if (selector > info->ngroups)
+		return -EINVAL;
+
+	grp = &info->groups[selector];
+	pin_id = grp->pins[0];
+
+	return sprd_pinconf_get(pctldev, pin_id, config);
+}
+
+static int sprd_pinconf_group_set(struct pinctrl_dev *pctldev,
+				  unsigned int selector,
+				  unsigned long *configs,
+				  unsigned int num_configs)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+	struct sprd_pin_group *grp;
+	int ret, i;
+
+	if (selector > info->ngroups)
+		return -EINVAL;
+
+	grp = &info->groups[selector];
+
+	for (i = 0; i < grp->npins; i++) {
+		unsigned int pin_id = grp->pins[i];
+
+		ret = sprd_pinconf_set(pctldev, pin_id, configs, num_configs);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int sprd_pinconf_get_config(struct pinctrl_dev *pctldev,
+				   unsigned int pin_id,
+				   unsigned long *config)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pin *pin = sprd_pinctrl_get_pin_by_id(pctl, pin_id);
+
+	if (!pin)
+		return -EINVAL;
+
+	if (pin->type == GLOBAL_CTRL_PIN) {
+		*config = (readl((void __iomem *)pin->reg) >>
+			   pin->bit_offset) & PINCTRL_BIT_MASK(pin->bit_width);
+	} else {
+		*config = readl((void __iomem *)pin->reg);
+	}
+
+	return 0;
+}
+
+static void sprd_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+				  struct seq_file *s, unsigned int pin_id)
+{
+	unsigned long config;
+	int ret;
+
+	ret = sprd_pinconf_get_config(pctldev, pin_id, &config);
+	if (ret)
+		return;
+
+	seq_printf(s, "0x%lx", config);
+}
+
+static void sprd_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
+					struct seq_file *s,
+					unsigned int selector)
+{
+	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+	struct sprd_pinctrl_soc_info *info = pctl->info;
+	struct sprd_pin_group *grp;
+	unsigned long config;
+	const char *name;
+	int i, ret;
+
+	if (selector > info->ngroups)
+		return;
+
+	grp = &info->groups[selector];
+
+	seq_printf(s, "\n");
+	for (i = 0; i < grp->npins; i++, config++) {
+		unsigned int pin_id = grp->pins[i];
+
+		name = pin_get_name(pctldev, pin_id);
+		ret = sprd_pinconf_get_config(pctldev, pin_id, &config);
+		if (ret)
+			return;
+
+		seq_printf(s, "%s: 0x%lx ", name, config);
+	}
+}
+
+static const struct pinconf_ops sprd_pinconf_ops = {
+	.is_generic = true,
+	.pin_config_get = sprd_pinconf_get,
+	.pin_config_set = sprd_pinconf_set,
+	.pin_config_group_get = sprd_pinconf_group_get,
+	.pin_config_group_set = sprd_pinconf_group_set,
+	.pin_config_dbg_show = sprd_pinconf_dbg_show,
+	.pin_config_group_dbg_show = sprd_pinconf_group_dbg_show,
+};
+
+static const struct pinconf_generic_params sprd_dt_params[] = {
+	{"sprd,control", SPRD_PIN_CONFIG_CONTROL, 0},
+	{"sprd,sleep-mode", SPRD_PIN_CONFIG_SLEEP_MODE, 0},
+};
+
+#ifdef CONFIG_DEBUG_FS
+static const struct pin_config_item sprd_conf_items[] = {
+	PCONFDUMP(SPRD_PIN_CONFIG_CONTROL, "global control", NULL, true),
+	PCONFDUMP(SPRD_PIN_CONFIG_SLEEP_MODE, "sleep mode", NULL, true),
+};
+#endif
+
+static struct pinctrl_desc sprd_pinctrl_desc = {
+	.pctlops = &sprd_pctrl_ops,
+	.pmxops = &sprd_pmx_ops,
+	.confops = &sprd_pinconf_ops,
+	.num_custom_params = ARRAY_SIZE(sprd_dt_params),
+	.custom_params = sprd_dt_params,
+#ifdef CONFIG_DEBUG_FS
+	.custom_conf_items = sprd_conf_items,
+#endif
+	.owner = THIS_MODULE,
+};
+
+static int sprd_pinctrl_parse_groups(struct device_node *np,
+				     struct sprd_pinctrl *sprd_pctl,
+				     struct sprd_pin_group *grp)
+{
+	struct property *prop;
+	const char *pin_name;
+	int ret, i = 0;
+
+	ret = of_property_count_strings(np, "pins");
+	if (ret < 0)
+		return ret;
+
+	grp->name = np->name;
+	grp->npins = ret;
+	grp->pins = devm_kzalloc(sprd_pctl->dev, grp->npins *
+				 sizeof(unsigned int), GFP_KERNEL);
+	if (!grp->pins)
+		return -ENOMEM;
+
+	of_property_for_each_string(np, "pins", prop, pin_name) {
+		ret = sprd_pinctrl_get_id_by_name(sprd_pctl, pin_name);
+		if (ret >= 0)
+			grp->pins[i++] = ret;
+	}
+
+	for (i = 0; i < grp->npins; i++) {
+		dev_dbg(sprd_pctl->dev,
+			"Group[%s] contains [%d] pins: id = %d\n",
+			grp->name, grp->npins, grp->pins[i]);
+	}
+
+	return 0;
+}
+
+static unsigned int sprd_pinctrl_get_groups(struct device_node *np)
+{
+	struct device_node *child;
+	unsigned int group_cnt, cnt;
+
+	group_cnt = of_get_child_count(np);
+
+	for_each_child_of_node(np, child) {
+		cnt = of_get_child_count(child);
+		if (cnt > 0)
+			group_cnt += cnt;
+	}
+
+	return group_cnt;
+}
+
+static int sprd_pinctrl_parse_dt(struct sprd_pinctrl *sprd_pctl)
+{
+	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;
+	struct device_node *np = sprd_pctl->dev->of_node;
+	struct device_node *child, *sub_child;
+	struct sprd_pin_group *grp;
+	const char **temp;
+	int ret;
+
+	if (!np)
+		return -ENODEV;
+
+	info->ngroups = sprd_pinctrl_get_groups(np);
+	if (!info->ngroups)
+		return 0;
+
+	info->groups = devm_kzalloc(sprd_pctl->dev, info->ngroups *
+				    sizeof(struct sprd_pin_group),
+				    GFP_KERNEL);
+	if (!info->groups)
+		return -ENOMEM;
+
+	info->grp_names = devm_kzalloc(sprd_pctl->dev,
+				       info->ngroups * sizeof(char *),
+				       GFP_KERNEL);
+	if (!info->grp_names)
+		return -ENOMEM;
+
+	temp = info->grp_names;
+	grp = info->groups;
+
+	for_each_child_of_node(np, child) {
+		ret = sprd_pinctrl_parse_groups(child, sprd_pctl, grp);
+		if (ret)
+			return ret;
+
+		*temp++ = grp->name;
+		grp++;
+
+		if (of_get_child_count(child) > 0) {
+			for_each_child_of_node(child, sub_child) {
+				ret = sprd_pinctrl_parse_groups(sub_child,
+								sprd_pctl, grp);
+				if (ret)
+					return ret;
+
+				*temp++ = grp->name;
+				grp++;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int sprd_pinctrl_add_pins(struct sprd_pinctrl *sprd_pctl,
+				 struct sprd_pins_info *sprd_soc_pin_info,
+				 int pins_cnt)
+{
+	struct sprd_pinctrl_soc_info *info = sprd_pctl->info;
+	unsigned int ctrl_pin = 0, com_pin = 0;
+	struct sprd_pin *pin;
+	int i;
+
+	info->npins = pins_cnt;
+	info->pins = devm_kzalloc(sprd_pctl->dev,
+				  info->npins * sizeof(struct sprd_pin),
+				  GFP_KERNEL);
+	if (!info->pins)
+		return -ENOMEM;
+
+	for (i = 0, pin = info->pins; i < info->npins; i++, pin++) {
+		unsigned int reg;
+
+		pin->name = sprd_soc_pin_info[i].name;
+		pin->type = sprd_soc_pin_info[i].type;
+		pin->number = sprd_soc_pin_info[i].num;
+		reg = sprd_soc_pin_info[i].reg;
+		if (pin->type == GLOBAL_CTRL_PIN) {
+			pin->reg = (unsigned long)sprd_pctl->base +
+				PINCTRL_REG_LEN * reg;
+			pin->bit_offset = sprd_soc_pin_info[i].bit_offset;
+			pin->bit_width = sprd_soc_pin_info[i].bit_width;
+			ctrl_pin++;
+		} else if (pin->type == COMMON_PIN) {
+			pin->reg = (unsigned long)sprd_pctl->base +
+				PINCTRL_REG_OFFSET + PINCTRL_REG_LEN *
+				(i - ctrl_pin);
+			com_pin++;
+		} else if (pin->type == MISC_PIN) {
+			pin->reg = (unsigned long)sprd_pctl->base +
+				PINCTRL_REG_MISC_OFFSET + PINCTRL_REG_LEN *
+				(i - ctrl_pin - com_pin);
+		}
+	}
+
+	for (i = 0, pin = info->pins; i < info->npins; pin++, i++) {
+		dev_dbg(sprd_pctl->dev, "pin name[%s-%d], type = %d, "
+			"bit offset = %ld, bit width = %ld, reg = 0x%lx\n",
+			pin->name, pin->number, pin->type,
+			pin->bit_offset, pin->bit_width, pin->reg);
+	}
+
+	return 0;
+}
+
+int sprd_pinctrl_core_probe(struct platform_device *pdev,
+			    struct sprd_pins_info *sprd_soc_pin_info,
+			    int pins_cnt)
+{
+	struct sprd_pinctrl *sprd_pctl;
+	struct sprd_pinctrl_soc_info *pinctrl_info;
+	struct pinctrl_pin_desc *pin_desc;
+	struct resource *res;
+	int ret, i;
+
+	sprd_pctl = devm_kzalloc(&pdev->dev, sizeof(struct sprd_pinctrl),
+				 GFP_KERNEL);
+	if (!sprd_pctl)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	sprd_pctl->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(sprd_pctl->base))
+		return PTR_ERR(sprd_pctl->base);
+
+	pinctrl_info = devm_kzalloc(&pdev->dev,
+				    sizeof(struct sprd_pinctrl_soc_info),
+				    GFP_KERNEL);
+	if (!pinctrl_info)
+		return -ENOMEM;
+
+	sprd_pctl->info = pinctrl_info;
+	sprd_pctl->dev = &pdev->dev;
+	platform_set_drvdata(pdev, sprd_pctl);
+
+	ret = sprd_pinctrl_add_pins(sprd_pctl, sprd_soc_pin_info, pins_cnt);
+	if (ret) {
+		dev_err(&pdev->dev, "fail to add pins information\n");
+		return ret;
+	}
+
+	pin_desc = devm_kzalloc(&pdev->dev, pinctrl_info->npins *
+				sizeof(struct pinctrl_pin_desc),
+				GFP_KERNEL);
+	if (!pin_desc)
+		return -ENOMEM;
+
+	for (i = 0; i < pinctrl_info->npins; i++) {
+		pin_desc[i].number = pinctrl_info->pins[i].number;
+		pin_desc[i].name = pinctrl_info->pins[i].name;
+		pin_desc[i].drv_data = pinctrl_info;
+	}
+
+	sprd_pinctrl_desc.pins = pin_desc;
+	sprd_pinctrl_desc.name = dev_name(&pdev->dev);
+	sprd_pinctrl_desc.npins = pinctrl_info->npins;
+
+	sprd_pctl->pctl = pinctrl_register(&sprd_pinctrl_desc,
+					   &pdev->dev, (void *)sprd_pctl);
+	if (IS_ERR(sprd_pctl->pctl)) {
+		dev_err(&pdev->dev, "could not register pinctrl driver\n");
+		return PTR_ERR(sprd_pctl->pctl);
+	}
+
+	ret = sprd_pinctrl_parse_dt(sprd_pctl);
+	if (ret) {
+		dev_err(&pdev->dev, "fail to parse dt properties\n");
+		pinctrl_unregister(sprd_pctl->pctl);
+		return ret;
+	}
+
+	return 0;
+}
+
+int sprd_pinctrl_remove(struct platform_device *pdev)
+{
+	struct sprd_pinctrl *sprd_pctl = platform_get_drvdata(pdev);
+
+	pinctrl_unregister(sprd_pctl->pctl);
+	return 0;
+}
+
+void sprd_pinctrl_shutdown(struct platform_device *pdev)
+{
+	struct pinctrl *pinctl = devm_pinctrl_get(&pdev->dev);
+	struct pinctrl_state *state;
+
+	state = pinctrl_lookup_state(pinctl, "shutdown");
+	if (!IS_ERR(state))
+		pinctrl_select_state(pinctl, state);
+}
+
+MODULE_DESCRIPTION("SPREADTRUM Pin Controller Driver");
+MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");
+MODULE_LICENSE("GPL v2");