pinctrl: samsung: Group all drivers in a sub-dir

Group all pin control drivers of Samsung platform together in
a sub-directory for easy maintenance.

Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 0 insertions, 1285 deletions

diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c
deleted file mode 100644
index 52f849ac06c1..000000000000
--- a/drivers/pinctrl/pinctrl-samsung.c
+++ /dev/null
@@ -1,1285 +0,0 @@
-/*
- * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's.
- *
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- * Copyright (c) 2012 Linaro Ltd
- *		http://www.linaro.org
- *
- * Author: Thomas Abraham <thomas.ab@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This driver implements the Samsung pinctrl driver. It supports setting up of
- * pinmux and pinconf configurations. The gpiolib interface is also included.
- * External interrupt (gpio and wakeup) support are not included in this driver
- * but provides extensions to which platform specific implementation of the gpio
- * and wakeup interrupts can be hooked to.
- */
-
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/irqdomain.h>
-#include <linux/spinlock.h>
-#include <linux/syscore_ops.h>
-
-#include "core.h"
-#include "pinctrl-samsung.h"
-
-#define GROUP_SUFFIX		"-grp"
-#define GSUFFIX_LEN		sizeof(GROUP_SUFFIX)
-#define FUNCTION_SUFFIX		"-mux"
-#define FSUFFIX_LEN		sizeof(FUNCTION_SUFFIX)
-
-/* list of all possible config options supported */
-static struct pin_config {
-	const char *property;
-	enum pincfg_type param;
-} cfg_params[] = {
-	{ "samsung,pin-pud", PINCFG_TYPE_PUD },
-	{ "samsung,pin-drv", PINCFG_TYPE_DRV },
-	{ "samsung,pin-con-pdn", PINCFG_TYPE_CON_PDN },
-	{ "samsung,pin-pud-pdn", PINCFG_TYPE_PUD_PDN },
-	{ "samsung,pin-val", PINCFG_TYPE_DAT },
-};
-
-/* Global list of devices (struct samsung_pinctrl_drv_data) */
-static LIST_HEAD(drvdata_list);
-
-static unsigned int pin_base;
-
-static inline struct samsung_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
-{
-	return container_of(gc, struct samsung_pin_bank, gpio_chip);
-}
-
-static int samsung_get_group_count(struct pinctrl_dev *pctldev)
-{
-	struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
-
-	return pmx->nr_groups;
-}
-
-static const char *samsung_get_group_name(struct pinctrl_dev *pctldev,
-						unsigned group)
-{
-	struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
-
-	return pmx->pin_groups[group].name;
-}
-
-static int samsung_get_group_pins(struct pinctrl_dev *pctldev,
-					unsigned group,
-					const unsigned **pins,
-					unsigned *num_pins)
-{
-	struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
-
-	*pins = pmx->pin_groups[group].pins;
-	*num_pins = pmx->pin_groups[group].num_pins;
-
-	return 0;
-}
-
-static int reserve_map(struct device *dev, struct pinctrl_map **map,
-		       unsigned *reserved_maps, unsigned *num_maps,
-		       unsigned reserve)
-{
-	unsigned old_num = *reserved_maps;
-	unsigned new_num = *num_maps + reserve;
-	struct pinctrl_map *new_map;
-
-	if (old_num >= new_num)
-		return 0;
-
-	new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
-	if (!new_map) {
-		dev_err(dev, "krealloc(map) failed\n");
-		return -ENOMEM;
-	}
-
-	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
-
-	*map = new_map;
-	*reserved_maps = new_num;
-
-	return 0;
-}
-
-static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
-		       unsigned *num_maps, const char *group,
-		       const char *function)
-{
-	if (WARN_ON(*num_maps == *reserved_maps))
-		return -ENOSPC;
-
-	(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
-	(*map)[*num_maps].data.mux.group = group;
-	(*map)[*num_maps].data.mux.function = function;
-	(*num_maps)++;
-
-	return 0;
-}
-
-static int add_map_configs(struct device *dev, struct pinctrl_map **map,
-			   unsigned *reserved_maps, unsigned *num_maps,
-			   const char *group, unsigned long *configs,
-			   unsigned num_configs)
-{
-	unsigned long *dup_configs;
-
-	if (WARN_ON(*num_maps == *reserved_maps))
-		return -ENOSPC;
-
-	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
-			      GFP_KERNEL);
-	if (!dup_configs) {
-		dev_err(dev, "kmemdup(configs) failed\n");
-		return -ENOMEM;
-	}
-
-	(*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
-	(*map)[*num_maps].data.configs.group_or_pin = group;
-	(*map)[*num_maps].data.configs.configs = dup_configs;
-	(*map)[*num_maps].data.configs.num_configs = num_configs;
-	(*num_maps)++;
-
-	return 0;
-}
-
-static int add_config(struct device *dev, unsigned long **configs,
-		      unsigned *num_configs, unsigned long config)
-{
-	unsigned old_num = *num_configs;
-	unsigned new_num = old_num + 1;
-	unsigned long *new_configs;
-
-	new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
-			       GFP_KERNEL);
-	if (!new_configs) {
-		dev_err(dev, "krealloc(configs) failed\n");
-		return -ENOMEM;
-	}
-
-	new_configs[old_num] = config;
-
-	*configs = new_configs;
-	*num_configs = new_num;
-
-	return 0;
-}
-
-static void samsung_dt_free_map(struct pinctrl_dev *pctldev,
-				      struct pinctrl_map *map,
-				      unsigned num_maps)
-{
-	int i;
-
-	for (i = 0; i < num_maps; i++)
-		if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
-			kfree(map[i].data.configs.configs);
-
-	kfree(map);
-}
-
-static int samsung_dt_subnode_to_map(struct samsung_pinctrl_drv_data *drvdata,
-				     struct device *dev,
-				     struct device_node *np,
-				     struct pinctrl_map **map,
-				     unsigned *reserved_maps,
-				     unsigned *num_maps)
-{
-	int ret, i;
-	u32 val;
-	unsigned long config;
-	unsigned long *configs = NULL;
-	unsigned num_configs = 0;
-	unsigned reserve;
-	struct property *prop;
-	const char *group;
-	bool has_func = false;
-
-	ret = of_property_read_u32(np, "samsung,pin-function", &val);
-	if (!ret)
-		has_func = true;
-
-	for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
-		ret = of_property_read_u32(np, cfg_params[i].property, &val);
-		if (!ret) {
-			config = PINCFG_PACK(cfg_params[i].param, val);
-			ret = add_config(dev, &configs, &num_configs, config);
-			if (ret < 0)
-				goto exit;
-		/* EINVAL=missing, which is fine since it's optional */
-		} else if (ret != -EINVAL) {
-			dev_err(dev, "could not parse property %s\n",
-				cfg_params[i].property);
-		}
-	}
-
-	reserve = 0;
-	if (has_func)
-		reserve++;
-	if (num_configs)
-		reserve++;
-	ret = of_property_count_strings(np, "samsung,pins");
-	if (ret < 0) {
-		dev_err(dev, "could not parse property samsung,pins\n");
-		goto exit;
-	}
-	reserve *= ret;
-
-	ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
-	if (ret < 0)
-		goto exit;
-
-	of_property_for_each_string(np, "samsung,pins", prop, group) {
-		if (has_func) {
-			ret = add_map_mux(map, reserved_maps,
-						num_maps, group, np->full_name);
-			if (ret < 0)
-				goto exit;
-		}
-
-		if (num_configs) {
-			ret = add_map_configs(dev, map, reserved_maps,
-					      num_maps, group, configs,
-					      num_configs);
-			if (ret < 0)
-				goto exit;
-		}
-	}
-
-	ret = 0;
-
-exit:
-	kfree(configs);
-	return ret;
-}
-
-static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
-					struct device_node *np_config,
-					struct pinctrl_map **map,
-					unsigned *num_maps)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-	unsigned reserved_maps;
-	struct device_node *np;
-	int ret;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-
-	reserved_maps = 0;
-	*map = NULL;
-	*num_maps = 0;
-
-	if (!of_get_child_count(np_config))
-		return samsung_dt_subnode_to_map(drvdata, pctldev->dev,
-							np_config, map,
-							&reserved_maps,
-							num_maps);
-
-	for_each_child_of_node(np_config, np) {
-		ret = samsung_dt_subnode_to_map(drvdata, pctldev->dev, np, map,
-						&reserved_maps, num_maps);
-		if (ret < 0) {
-			samsung_dt_free_map(pctldev, *map, *num_maps);
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
-/* list of pinctrl callbacks for the pinctrl core */
-static const struct pinctrl_ops samsung_pctrl_ops = {
-	.get_groups_count	= samsung_get_group_count,
-	.get_group_name		= samsung_get_group_name,
-	.get_group_pins		= samsung_get_group_pins,
-	.dt_node_to_map		= samsung_dt_node_to_map,
-	.dt_free_map		= samsung_dt_free_map,
-};
-
-/* check if the selector is a valid pin function selector */
-static int samsung_get_functions_count(struct pinctrl_dev *pctldev)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	return drvdata->nr_functions;
-}
-
-/* return the name of the pin function specified */
-static const char *samsung_pinmux_get_fname(struct pinctrl_dev *pctldev,
-						unsigned selector)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	return drvdata->pmx_functions[selector].name;
-}
-
-/* return the groups associated for the specified function selector */
-static int samsung_pinmux_get_groups(struct pinctrl_dev *pctldev,
-		unsigned selector, const char * const **groups,
-		unsigned * const num_groups)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	*groups = drvdata->pmx_functions[selector].groups;
-	*num_groups = drvdata->pmx_functions[selector].num_groups;
-	return 0;
-}
-
-/*
- * 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 void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata,
-			unsigned pin, void __iomem **reg, u32 *offset,
-			struct samsung_pin_bank **bank)
-{
-	struct samsung_pin_bank *b;
-
-	b = drvdata->ctrl->pin_banks;
-
-	while ((pin >= b->pin_base) &&
-			((b->pin_base + b->nr_pins - 1) < pin))
-		b++;
-
-	*reg = drvdata->virt_base + b->pctl_offset;
-	*offset = pin - b->pin_base;
-	if (bank)
-		*bank = b;
-}
-
-/* enable or disable a pinmux function */
-static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector,
-					unsigned group, bool enable)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-	struct samsung_pin_bank_type *type;
-	struct samsung_pin_bank *bank;
-	void __iomem *reg;
-	u32 mask, shift, data, pin_offset;
-	unsigned long flags;
-	const struct samsung_pmx_func *func;
-	const struct samsung_pin_group *grp;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	func = &drvdata->pmx_functions[selector];
-	grp = &drvdata->pin_groups[group];
-
-	pin_to_reg_bank(drvdata, grp->pins[0] - drvdata->ctrl->base,
-			&reg, &pin_offset, &bank);
-	type = bank->type;
-	mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
-	shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC];
-	if (shift >= 32) {
-		/* Some banks have two config registers */
-		shift -= 32;
-		reg += 4;
-	}
-
-	spin_lock_irqsave(&bank->slock, flags);
-
-	data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]);
-	data &= ~(mask << shift);
-	if (enable)
-		data |= func->val << shift;
-	writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]);
-
-	spin_unlock_irqrestore(&bank->slock, flags);
-}
-
-/* enable a specified pinmux by writing to registers */
-static int samsung_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector,
-					unsigned group)
-{
-	samsung_pinmux_setup(pctldev, selector, group, true);
-	return 0;
-}
-
-/* list of pinmux callbacks for the pinmux vertical in pinctrl core */
-static const struct pinmux_ops samsung_pinmux_ops = {
-	.get_functions_count	= samsung_get_functions_count,
-	.get_function_name	= samsung_pinmux_get_fname,
-	.get_function_groups	= samsung_pinmux_get_groups,
-	.enable			= samsung_pinmux_enable,
-};
-
-/* set or get the pin config settings for a specified pin */
-static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin,
-				unsigned long *config, bool set)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-	struct samsung_pin_bank_type *type;
-	struct samsung_pin_bank *bank;
-	void __iomem *reg_base;
-	enum pincfg_type cfg_type = PINCFG_UNPACK_TYPE(*config);
-	u32 data, width, pin_offset, mask, shift;
-	u32 cfg_value, cfg_reg;
-	unsigned long flags;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	pin_to_reg_bank(drvdata, pin - drvdata->ctrl->base, &reg_base,
-					&pin_offset, &bank);
-	type = bank->type;
-
-	if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type])
-		return -EINVAL;
-
-	width = type->fld_width[cfg_type];
-	cfg_reg = type->reg_offset[cfg_type];
-
-	spin_lock_irqsave(&bank->slock, flags);
-
-	mask = (1 << width) - 1;
-	shift = pin_offset * width;
-	data = readl(reg_base + cfg_reg);
-
-	if (set) {
-		cfg_value = PINCFG_UNPACK_VALUE(*config);
-		data &= ~(mask << shift);
-		data |= (cfg_value << shift);
-		writel(data, reg_base + cfg_reg);
-	} else {
-		data >>= shift;
-		data &= mask;
-		*config = PINCFG_PACK(cfg_type, data);
-	}
-
-	spin_unlock_irqrestore(&bank->slock, flags);
-
-	return 0;
-}
-
-/* set the pin config settings for a specified pin */
-static int samsung_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
-				unsigned long *configs, unsigned num_configs)
-{
-	int i, ret;
-
-	for (i = 0; i < num_configs; i++) {
-		ret = samsung_pinconf_rw(pctldev, pin, &configs[i], true);
-		if (ret < 0)
-			return ret;
-	} /* for each config */
-
-	return 0;
-}
-
-/* get the pin config settings for a specified pin */
-static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
-					unsigned long *config)
-{
-	return samsung_pinconf_rw(pctldev, pin, config, false);
-}
-
-/* set the pin config settings for a specified pin group */
-static int samsung_pinconf_group_set(struct pinctrl_dev *pctldev,
-			unsigned group, unsigned long *configs,
-			unsigned num_configs)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-	const unsigned int *pins;
-	unsigned int cnt;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	pins = drvdata->pin_groups[group].pins;
-
-	for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++)
-		samsung_pinconf_set(pctldev, pins[cnt], configs, num_configs);
-
-	return 0;
-}
-
-/* get the pin config settings for a specified pin group */
-static int samsung_pinconf_group_get(struct pinctrl_dev *pctldev,
-				unsigned int group, unsigned long *config)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-	const unsigned int *pins;
-
-	drvdata = pinctrl_dev_get_drvdata(pctldev);
-	pins = drvdata->pin_groups[group].pins;
-	samsung_pinconf_get(pctldev, pins[0], config);
-	return 0;
-}
-
-/* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */
-static const struct pinconf_ops samsung_pinconf_ops = {
-	.pin_config_get		= samsung_pinconf_get,
-	.pin_config_set		= samsung_pinconf_set,
-	.pin_config_group_get	= samsung_pinconf_group_get,
-	.pin_config_group_set	= samsung_pinconf_group_set,
-};
-
-/* gpiolib gpio_set callback function */
-static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
-{
-	struct samsung_pin_bank *bank = gc_to_pin_bank(gc);
-	struct samsung_pin_bank_type *type = bank->type;
-	unsigned long flags;
-	void __iomem *reg;
-	u32 data;
-
-	reg = bank->drvdata->virt_base + bank->pctl_offset;
-
-	spin_lock_irqsave(&bank->slock, flags);
-
-	data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
-	data &= ~(1 << offset);
-	if (value)
-		data |= 1 << offset;
-	writel(data, reg + type->reg_offset[PINCFG_TYPE_DAT]);
-
-	spin_unlock_irqrestore(&bank->slock, flags);
-}
-
-/* gpiolib gpio_get callback function */
-static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset)
-{
-	void __iomem *reg;
-	u32 data;
-	struct samsung_pin_bank *bank = gc_to_pin_bank(gc);
-	struct samsung_pin_bank_type *type = bank->type;
-
-	reg = bank->drvdata->virt_base + bank->pctl_offset;
-
-	data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
-	data >>= offset;
-	data &= 1;
-	return data;
-}
-
-/*
- * The calls to gpio_direction_output() and gpio_direction_input()
- * leads to this function call.
- */
-static int samsung_gpio_set_direction(struct gpio_chip *gc,
-					     unsigned offset, bool input)
-{
-	struct samsung_pin_bank_type *type;
-	struct samsung_pin_bank *bank;
-	struct samsung_pinctrl_drv_data *drvdata;
-	void __iomem *reg;
-	u32 data, mask, shift;
-	unsigned long flags;
-
-	bank = gc_to_pin_bank(gc);
-	type = bank->type;
-	drvdata = bank->drvdata;
-
-	reg = drvdata->virt_base + bank->pctl_offset +
-					type->reg_offset[PINCFG_TYPE_FUNC];
-
-	mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
-	shift = offset * type->fld_width[PINCFG_TYPE_FUNC];
-	if (shift >= 32) {
-		/* Some banks have two config registers */
-		shift -= 32;
-		reg += 4;
-	}
-
-	spin_lock_irqsave(&bank->slock, flags);
-
-	data = readl(reg);
-	data &= ~(mask << shift);
-	if (!input)
-		data |= FUNC_OUTPUT << shift;
-	writel(data, reg);
-
-	spin_unlock_irqrestore(&bank->slock, flags);
-
-	return 0;
-}
-
-/* gpiolib gpio_direction_input callback function. */
-static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
-{
-	return samsung_gpio_set_direction(gc, offset, true);
-}
-
-/* gpiolib gpio_direction_output callback function. */
-static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
-							int value)
-{
-	samsung_gpio_set(gc, offset, value);
-	return samsung_gpio_set_direction(gc, offset, false);
-}
-
-/*
- * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
- * and a virtual IRQ, if not already present.
- */
-static int samsung_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
-{
-	struct samsung_pin_bank *bank = gc_to_pin_bank(gc);
-	unsigned int virq;
-
-	if (!bank->irq_domain)
-		return -ENXIO;
-
-	virq = irq_create_mapping(bank->irq_domain, offset);
-
-	return (virq) ? : -ENXIO;
-}
-
-static struct samsung_pin_group *samsung_pinctrl_create_groups(
-				struct device *dev,
-				struct samsung_pinctrl_drv_data *drvdata,
-				unsigned int *cnt)
-{
-	struct pinctrl_desc *ctrldesc = &drvdata->pctl;
-	struct samsung_pin_group *groups, *grp;
-	const struct pinctrl_pin_desc *pdesc;
-	int i;
-
-	groups = devm_kzalloc(dev, ctrldesc->npins * sizeof(*groups),
-				GFP_KERNEL);
-	if (!groups)
-		return ERR_PTR(-EINVAL);
-	grp = groups;
-
-	pdesc = ctrldesc->pins;
-	for (i = 0; i < ctrldesc->npins; ++i, ++pdesc, ++grp) {
-		grp->name = pdesc->name;
-		grp->pins = &pdesc->number;
-		grp->num_pins = 1;
-	}
-
-	*cnt = ctrldesc->npins;
-	return groups;
-}
-
-static int samsung_pinctrl_create_function(struct device *dev,
-				struct samsung_pinctrl_drv_data *drvdata,
-				struct device_node *func_np,
-				struct samsung_pmx_func *func)
-{
-	int npins;
-	int ret;
-	int i;
-
-	if (of_property_read_u32(func_np, "samsung,pin-function", &func->val))
-		return 0;
-
-	npins = of_property_count_strings(func_np, "samsung,pins");
-	if (npins < 1) {
-		dev_err(dev, "invalid pin list in %s node", func_np->name);
-		return -EINVAL;
-	}
-
-	func->name = func_np->full_name;
-
-	func->groups = devm_kzalloc(dev, npins * sizeof(char *), GFP_KERNEL);
-	if (!func->groups)
-		return -ENOMEM;
-
-	for (i = 0; i < npins; ++i) {
-		const char *gname;
-
-		ret = of_property_read_string_index(func_np, "samsung,pins",
-							i, &gname);
-		if (ret) {
-			dev_err(dev,
-				"failed to read pin name %d from %s node\n",
-				i, func_np->name);
-			return ret;
-		}
-
-		func->groups[i] = gname;
-	}
-
-	func->num_groups = npins;
-	return 1;
-}
-
-static struct samsung_pmx_func *samsung_pinctrl_create_functions(
-				struct device *dev,
-				struct samsung_pinctrl_drv_data *drvdata,
-				unsigned int *cnt)
-{
-	struct samsung_pmx_func *functions, *func;
-	struct device_node *dev_np = dev->of_node;
-	struct device_node *cfg_np;
-	unsigned int func_cnt = 0;
-	int ret;
-
-	/*
-	 * Iterate over all the child nodes of the pin controller node
-	 * and create pin groups and pin function lists.
-	 */
-	for_each_child_of_node(dev_np, cfg_np) {
-		struct device_node *func_np;
-
-		if (!of_get_child_count(cfg_np)) {
-			if (!of_find_property(cfg_np,
-			    "samsung,pin-function", NULL))
-				continue;
-			++func_cnt;
-			continue;
-		}
-
-		for_each_child_of_node(cfg_np, func_np) {
-			if (!of_find_property(func_np,
-			    "samsung,pin-function", NULL))
-				continue;
-			++func_cnt;
-		}
-	}
-
-	functions = devm_kzalloc(dev, func_cnt * sizeof(*functions),
-					GFP_KERNEL);
-	if (!functions) {
-		dev_err(dev, "failed to allocate memory for function list\n");
-		return ERR_PTR(-EINVAL);
-	}
-	func = functions;
-
-	/*
-	 * Iterate over all the child nodes of the pin controller node
-	 * and create pin groups and pin function lists.
-	 */
-	func_cnt = 0;
-	for_each_child_of_node(dev_np, cfg_np) {
-		struct device_node *func_np;
-
-		if (!of_get_child_count(cfg_np)) {
-			ret = samsung_pinctrl_create_function(dev, drvdata,
-							cfg_np, func);
-			if (ret < 0)
-				return ERR_PTR(ret);
-			if (ret > 0) {
-				++func;
-				++func_cnt;
-			}
-			continue;
-		}
-
-		for_each_child_of_node(cfg_np, func_np) {
-			ret = samsung_pinctrl_create_function(dev, drvdata,
-						func_np, func);
-			if (ret < 0)
-				return ERR_PTR(ret);
-			if (ret > 0) {
-				++func;
-				++func_cnt;
-			}
-		}
-	}
-
-	*cnt = func_cnt;
-	return functions;
-}
-
-/*
- * Parse the information about all the available pin groups and pin functions
- * from device node of the pin-controller. A pin group is formed with all
- * the pins listed in the "samsung,pins" property.
- */
-
-static int samsung_pinctrl_parse_dt(struct platform_device *pdev,
-				    struct samsung_pinctrl_drv_data *drvdata)
-{
-	struct device *dev = &pdev->dev;
-	struct samsung_pin_group *groups;
-	struct samsung_pmx_func *functions;
-	unsigned int grp_cnt = 0, func_cnt = 0;
-
-	groups = samsung_pinctrl_create_groups(dev, drvdata, &grp_cnt);
-	if (IS_ERR(groups)) {
-		dev_err(dev, "failed to parse pin groups\n");
-		return PTR_ERR(groups);
-	}
-
-	functions = samsung_pinctrl_create_functions(dev, drvdata, &func_cnt);
-	if (IS_ERR(functions)) {
-		dev_err(dev, "failed to parse pin functions\n");
-		return PTR_ERR(groups);
-	}
-
-	drvdata->pin_groups = groups;
-	drvdata->nr_groups = grp_cnt;
-	drvdata->pmx_functions = functions;
-	drvdata->nr_functions = func_cnt;
-
-	return 0;
-}
-
-/* register the pinctrl interface with the pinctrl subsystem */
-static int samsung_pinctrl_register(struct platform_device *pdev,
-				    struct samsung_pinctrl_drv_data *drvdata)
-{
-	struct pinctrl_desc *ctrldesc = &drvdata->pctl;
-	struct pinctrl_pin_desc *pindesc, *pdesc;
-	struct samsung_pin_bank *pin_bank;
-	char *pin_names;
-	int pin, bank, ret;
-
-	ctrldesc->name = "samsung-pinctrl";
-	ctrldesc->owner = THIS_MODULE;
-	ctrldesc->pctlops = &samsung_pctrl_ops;
-	ctrldesc->pmxops = &samsung_pinmux_ops;
-	ctrldesc->confops = &samsung_pinconf_ops;
-
-	pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
-			drvdata->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 = drvdata->ctrl->nr_pins;
-
-	/* dynamically populate the pin number and pin name for pindesc */
-	for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++)
-		pdesc->number = pin + drvdata->ctrl->base;
-
-	/*
-	 * allocate space for storing the dynamically generated names for all
-	 * the pins which belong to this pin-controller.
-	 */
-	pin_names = devm_kzalloc(&pdev->dev, sizeof(char) * PIN_NAME_LENGTH *
-					drvdata->ctrl->nr_pins, GFP_KERNEL);
-	if (!pin_names) {
-		dev_err(&pdev->dev, "mem alloc for pin names failed\n");
-		return -ENOMEM;
-	}
-
-	/* for each pin, the name of the pin is pin-bank name + pin number */
-	for (bank = 0; bank < drvdata->ctrl->nr_banks; bank++) {
-		pin_bank = &drvdata->ctrl->pin_banks[bank];
-		for (pin = 0; pin < pin_bank->nr_pins; pin++) {
-			sprintf(pin_names, "%s-%d", pin_bank->name, pin);
-			pdesc = pindesc + pin_bank->pin_base + pin;
-			pdesc->name = pin_names;
-			pin_names += PIN_NAME_LENGTH;
-		}
-	}
-
-	ret = samsung_pinctrl_parse_dt(pdev, drvdata);
-	if (ret)
-		return ret;
-
-	drvdata->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, drvdata);
-	if (!drvdata->pctl_dev) {
-		dev_err(&pdev->dev, "could not register pinctrl driver\n");
-		return -EINVAL;
-	}
-
-	for (bank = 0; bank < drvdata->ctrl->nr_banks; ++bank) {
-		pin_bank = &drvdata->ctrl->pin_banks[bank];
-		pin_bank->grange.name = pin_bank->name;
-		pin_bank->grange.id = bank;
-		pin_bank->grange.pin_base = drvdata->ctrl->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(drvdata->pctl_dev, &pin_bank->grange);
-	}
-
-	return 0;
-}
-
-static int samsung_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
-	return pinctrl_request_gpio(chip->base + offset);
-}
-
-static void samsung_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
-	pinctrl_free_gpio(chip->base + offset);
-}
-
-static const struct gpio_chip samsung_gpiolib_chip = {
-	.request = samsung_gpio_request,
-	.free = samsung_gpio_free,
-	.set = samsung_gpio_set,
-	.get = samsung_gpio_get,
-	.direction_input = samsung_gpio_direction_input,
-	.direction_output = samsung_gpio_direction_output,
-	.to_irq = samsung_gpio_to_irq,
-	.owner = THIS_MODULE,
-};
-
-/* register the gpiolib interface with the gpiolib subsystem */
-static int samsung_gpiolib_register(struct platform_device *pdev,
-				    struct samsung_pinctrl_drv_data *drvdata)
-{
-	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
-	struct samsung_pin_bank *bank = ctrl->pin_banks;
-	struct gpio_chip *gc;
-	int ret;
-	int i;
-
-	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
-		bank->gpio_chip = samsung_gpiolib_chip;
-
-		gc = &bank->gpio_chip;
-		gc->base = ctrl->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;
-		}
-	}
-
-	return 0;
-
-fail:
-	for (--i, --bank; i >= 0; --i, --bank)
-		if (gpiochip_remove(&bank->gpio_chip))
-			dev_err(&pdev->dev, "gpio chip %s remove failed\n",
-							bank->gpio_chip.label);
-	return ret;
-}
-
-/* unregister the gpiolib interface with the gpiolib subsystem */
-static int samsung_gpiolib_unregister(struct platform_device *pdev,
-				      struct samsung_pinctrl_drv_data *drvdata)
-{
-	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
-	struct samsung_pin_bank *bank = ctrl->pin_banks;
-	int ret = 0;
-	int i;
-
-	for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank)
-		ret = gpiochip_remove(&bank->gpio_chip);
-
-	if (ret)
-		dev_err(&pdev->dev, "gpio chip remove failed\n");
-
-	return ret;
-}
-
-static const struct of_device_id samsung_pinctrl_dt_match[];
-
-/* retrieve the soc specific data */
-static struct samsung_pin_ctrl *samsung_pinctrl_get_soc_data(
-				struct samsung_pinctrl_drv_data *d,
-				struct platform_device *pdev)
-{
-	int id;
-	const struct of_device_id *match;
-	struct device_node *node = pdev->dev.of_node;
-	struct device_node *np;
-	struct samsung_pin_ctrl *ctrl;
-	struct samsung_pin_bank *bank;
-	int i;
-
-	id = of_alias_get_id(node, "pinctrl");
-	if (id < 0) {
-		dev_err(&pdev->dev, "failed to get alias id\n");
-		return NULL;
-	}
-	match = of_match_node(samsung_pinctrl_dt_match, node);
-	ctrl = (struct samsung_pin_ctrl *)match->data + id;
-
-	bank = ctrl->pin_banks;
-	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
-		spin_lock_init(&bank->slock);
-		bank->drvdata = d;
-		bank->pin_base = ctrl->nr_pins;
-		ctrl->nr_pins += bank->nr_pins;
-	}
-
-	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;
-				break;
-			}
-		}
-	}
-
-	ctrl->base = pin_base;
-	pin_base += ctrl->nr_pins;
-
-	return ctrl;
-}
-
-static int samsung_pinctrl_probe(struct platform_device *pdev)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-	struct device *dev = &pdev->dev;
-	struct samsung_pin_ctrl *ctrl;
-	struct resource *res;
-	int ret;
-
-	if (!dev->of_node) {
-		dev_err(dev, "device tree node not found\n");
-		return -ENODEV;
-	}
-
-	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
-	if (!drvdata) {
-		dev_err(dev, "failed to allocate memory for driver's "
-				"private data\n");
-		return -ENOMEM;
-	}
-
-	ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev);
-	if (!ctrl) {
-		dev_err(&pdev->dev, "driver data not available\n");
-		return -EINVAL;
-	}
-	drvdata->ctrl = ctrl;
-	drvdata->dev = dev;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	drvdata->virt_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(drvdata->virt_base))
-		return PTR_ERR(drvdata->virt_base);
-
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (res)
-		drvdata->irq = res->start;
-
-	ret = samsung_gpiolib_register(pdev, drvdata);
-	if (ret)
-		return ret;
-
-	ret = samsung_pinctrl_register(pdev, drvdata);
-	if (ret) {
-		samsung_gpiolib_unregister(pdev, drvdata);
-		return ret;
-	}
-
-	if (ctrl->eint_gpio_init)
-		ctrl->eint_gpio_init(drvdata);
-	if (ctrl->eint_wkup_init)
-		ctrl->eint_wkup_init(drvdata);
-
-	platform_set_drvdata(pdev, drvdata);
-
-	/* Add to the global list */
-	list_add_tail(&drvdata->node, &drvdata_list);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-
-/**
- * samsung_pinctrl_suspend_dev - save pinctrl state for suspend for a device
- *
- * Save data for all banks handled by this device.
- */
-static void samsung_pinctrl_suspend_dev(
-	struct samsung_pinctrl_drv_data *drvdata)
-{
-	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
-	void __iomem *virt_base = drvdata->virt_base;
-	int i;
-
-	for (i = 0; i < ctrl->nr_banks; i++) {
-		struct samsung_pin_bank *bank = &ctrl->pin_banks[i];
-		void __iomem *reg = virt_base + bank->pctl_offset;
-
-		u8 *offs = bank->type->reg_offset;
-		u8 *widths = bank->type->fld_width;
-		enum pincfg_type type;
-
-		/* Registers without a powerdown config aren't lost */
-		if (!widths[PINCFG_TYPE_CON_PDN])
-			continue;
-
-		for (type = 0; type < PINCFG_TYPE_NUM; type++)
-			if (widths[type])
-				bank->pm_save[type] = readl(reg + offs[type]);
-
-		if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
-			/* Some banks have two config registers */
-			bank->pm_save[PINCFG_TYPE_NUM] =
-				readl(reg + offs[PINCFG_TYPE_FUNC] + 4);
-			pr_debug("Save %s @ %p (con %#010x %08x)\n",
-				 bank->name, reg,
-				 bank->pm_save[PINCFG_TYPE_FUNC],
-				 bank->pm_save[PINCFG_TYPE_NUM]);
-		} else {
-			pr_debug("Save %s @ %p (con %#010x)\n", bank->name,
-				 reg, bank->pm_save[PINCFG_TYPE_FUNC]);
-		}
-	}
-
-	if (ctrl->suspend)
-		ctrl->suspend(drvdata);
-}
-
-/**
- * samsung_pinctrl_resume_dev - restore pinctrl state from suspend for a device
- *
- * Restore one of the banks that was saved during suspend.
- *
- * We don't bother doing anything complicated to avoid glitching lines since
- * we're called before pad retention is turned off.
- */
-static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata)
-{
-	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
-	void __iomem *virt_base = drvdata->virt_base;
-	int i;
-
-	if (ctrl->resume)
-		ctrl->resume(drvdata);
-
-	for (i = 0; i < ctrl->nr_banks; i++) {
-		struct samsung_pin_bank *bank = &ctrl->pin_banks[i];
-		void __iomem *reg = virt_base + bank->pctl_offset;
-
-		u8 *offs = bank->type->reg_offset;
-		u8 *widths = bank->type->fld_width;
-		enum pincfg_type type;
-
-		/* Registers without a powerdown config aren't lost */
-		if (!widths[PINCFG_TYPE_CON_PDN])
-			continue;
-
-		if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
-			/* Some banks have two config registers */
-			pr_debug("%s @ %p (con %#010x %08x => %#010x %08x)\n",
-				 bank->name, reg,
-				 readl(reg + offs[PINCFG_TYPE_FUNC]),
-				 readl(reg + offs[PINCFG_TYPE_FUNC] + 4),
-				 bank->pm_save[PINCFG_TYPE_FUNC],
-				 bank->pm_save[PINCFG_TYPE_NUM]);
-			writel(bank->pm_save[PINCFG_TYPE_NUM],
-			       reg + offs[PINCFG_TYPE_FUNC] + 4);
-		} else {
-			pr_debug("%s @ %p (con %#010x => %#010x)\n", bank->name,
-				 reg, readl(reg + offs[PINCFG_TYPE_FUNC]),
-				 bank->pm_save[PINCFG_TYPE_FUNC]);
-		}
-		for (type = 0; type < PINCFG_TYPE_NUM; type++)
-			if (widths[type])
-				writel(bank->pm_save[type], reg + offs[type]);
-	}
-}
-
-/**
- * samsung_pinctrl_suspend - save pinctrl state for suspend
- *
- * Save data for all banks across all devices.
- */
-static int samsung_pinctrl_suspend(void)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-
-	list_for_each_entry(drvdata, &drvdata_list, node) {
-		samsung_pinctrl_suspend_dev(drvdata);
-	}
-
-	return 0;
-}
-
-/**
- * samsung_pinctrl_resume - restore pinctrl state for suspend
- *
- * Restore data for all banks across all devices.
- */
-static void samsung_pinctrl_resume(void)
-{
-	struct samsung_pinctrl_drv_data *drvdata;
-
-	list_for_each_entry_reverse(drvdata, &drvdata_list, node) {
-		samsung_pinctrl_resume_dev(drvdata);
-	}
-}
-
-#else
-#define samsung_pinctrl_suspend		NULL
-#define samsung_pinctrl_resume		NULL
-#endif
-
-static struct syscore_ops samsung_pinctrl_syscore_ops = {
-	.suspend	= samsung_pinctrl_suspend,
-	.resume		= samsung_pinctrl_resume,
-};
-
-static const struct of_device_id samsung_pinctrl_dt_match[] = {
-#ifdef CONFIG_PINCTRL_EXYNOS
-	{ .compatible = "samsung,exynos3250-pinctrl",
-		.data = (void *)exynos3250_pin_ctrl },
-	{ .compatible = "samsung,exynos4210-pinctrl",
-		.data = (void *)exynos4210_pin_ctrl },
-	{ .compatible = "samsung,exynos4x12-pinctrl",
-		.data = (void *)exynos4x12_pin_ctrl },
-	{ .compatible = "samsung,exynos5250-pinctrl",
-		.data = (void *)exynos5250_pin_ctrl },
-	{ .compatible = "samsung,exynos5260-pinctrl",
-		.data = (void *)exynos5260_pin_ctrl },
-	{ .compatible = "samsung,exynos5420-pinctrl",
-		.data = (void *)exynos5420_pin_ctrl },
-	{ .compatible = "samsung,s5pv210-pinctrl",
-		.data = (void *)s5pv210_pin_ctrl },
-#endif
-#ifdef CONFIG_PINCTRL_S3C64XX
-	{ .compatible = "samsung,s3c64xx-pinctrl",
-		.data = s3c64xx_pin_ctrl },
-#endif
-#ifdef CONFIG_PINCTRL_S3C24XX
-	{ .compatible = "samsung,s3c2412-pinctrl",
-		.data = s3c2412_pin_ctrl },
-	{ .compatible = "samsung,s3c2416-pinctrl",
-		.data = s3c2416_pin_ctrl },
-	{ .compatible = "samsung,s3c2440-pinctrl",
-		.data = s3c2440_pin_ctrl },
-	{ .compatible = "samsung,s3c2450-pinctrl",
-		.data = s3c2450_pin_ctrl },
-#endif
-	{},
-};
-MODULE_DEVICE_TABLE(of, samsung_pinctrl_dt_match);
-
-static struct platform_driver samsung_pinctrl_driver = {
-	.probe		= samsung_pinctrl_probe,
-	.driver = {
-		.name	= "samsung-pinctrl",
-		.owner	= THIS_MODULE,
-		.of_match_table = samsung_pinctrl_dt_match,
-	},
-};
-
-static int __init samsung_pinctrl_drv_register(void)
-{
-	/*
-	 * Register syscore ops for save/restore of registers across suspend.
-	 * It's important to ensure that this driver is running at an earlier
-	 * initcall level than any arch-specific init calls that install syscore
-	 * ops that turn off pad retention (like exynos_pm_resume).
-	 */
-	register_syscore_ops(&samsung_pinctrl_syscore_ops);
-
-	return platform_driver_register(&samsung_pinctrl_driver);
-}
-postcore_initcall(samsung_pinctrl_drv_register);
-
-static void __exit samsung_pinctrl_drv_unregister(void)
-{
-	platform_driver_unregister(&samsung_pinctrl_driver);
-}
-module_exit(samsung_pinctrl_drv_unregister);
-
-MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");
-MODULE_DESCRIPTION("Samsung pinctrl driver");
-MODULE_LICENSE("GPL v2");