// SPDX-License-Identifier: GPL-2.0+
//
// 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 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/clk.h>
#include <linux/err.h>
#include <linux/gpio/driver.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/spinlock.h>

#include "../core.h"
#include "pinctrl-samsung.h"

/* maximum number of the memory resources */
#define SAMSUNG_PINCTRL_NUM_RESOURCES   2

/* 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 },
};

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)
                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_array(configs, num_configs, sizeof(*dup_configs),
                                    GFP_KERNEL);
        if (!dup_configs)
                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)
                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;
        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_scoped(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;
}

#ifdef CONFIG_DEBUG_FS
/* Forward declaration which can be used by samsung_pin_dbg_show */
static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
                                        unsigned long *config);
static const char * const reg_names[] = {"CON", "DAT", "PUD", "DRV", "CON_PDN",
                                         "PUD_PDN"};

static void samsung_pin_dbg_show(struct pinctrl_dev *pctldev,
                                struct seq_file *s, unsigned int pin)
{
        enum pincfg_type cfg_type;
        unsigned long config;
        int ret;

        for (cfg_type = 0; cfg_type < PINCFG_TYPE_NUM; cfg_type++) {
                config = PINCFG_PACK(cfg_type, 0);
                ret = samsung_pinconf_get(pctldev, pin, &config);
                if (ret < 0)
                        continue;

                seq_printf(s, " %s(0x%lx)", reg_names[cfg_type],
                           PINCFG_UNPACK_VALUE(config));
        }
}
#endif

/* 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,
#ifdef CONFIG_DEBUG_FS
        .pin_dbg_show           = samsung_pin_dbg_show,
#endif
};

/* 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->pin_banks;

        while ((pin >= b->pin_base) &&
                        ((b->pin_base + b->nr_pins - 1) < pin))
                b++;

        *reg = b->pctl_base + b->pctl_offset;
        *offset = pin - b->pin_base;
        if (bank)
                *bank = b;
}

/* enable or disable a pinmux function */
static int samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector,
                                unsigned group)
{
        struct samsung_pinctrl_drv_data *drvdata;
        const 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;
        int ret;

        drvdata = pinctrl_dev_get_drvdata(pctldev);
        func = &drvdata->pmx_functions[selector];
        grp = &drvdata->pin_groups[group];

        pin_to_reg_bank(drvdata, grp->pins[0], &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;
        }

        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(pctldev->dev, "failed to enable clock for setup\n");
                return ret;
        }

        raw_spin_lock_irqsave(&bank->slock, flags);

        data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]);
        data &= ~(mask << shift);
        data |= func->val << shift;
        writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]);

        raw_spin_unlock_irqrestore(&bank->slock, flags);

        clk_disable(drvdata->pclk);

        return 0;
}

/* enable a specified pinmux by writing to registers */
static int samsung_pinmux_set_mux(struct pinctrl_dev *pctldev,
                                  unsigned selector,
                                  unsigned group)
{
        return samsung_pinmux_setup(pctldev, selector, group);
}

/* 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,
        .set_mux                = samsung_pinmux_set_mux,
};

/* 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;
        const 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;
        int ret;

        drvdata = pinctrl_dev_get_drvdata(pctldev);
        pin_to_reg_bank(drvdata, pin, &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];

        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(drvdata->dev, "failed to enable clock\n");
                return ret;
        }

        raw_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);
        }

        raw_spin_unlock_irqrestore(&bank->slock, flags);

        clk_disable(drvdata->pclk);

        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,
};

/*
 * The samsung_gpio_set_vlaue() should be called with "bank->slock" held
 * to avoid race condition.
 */
static void samsung_gpio_set_value(struct gpio_chip *gc,
                                          unsigned offset, int value)
{
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);
        const struct samsung_pin_bank_type *type = bank->type;
        void __iomem *reg;
        u32 data;

        reg = bank->pctl_base + bank->pctl_offset;

        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]);
}

/* gpiolib gpio_set callback function */
static int samsung_gpio_set(struct gpio_chip *gc, unsigned int offset,
                            int value)
{
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);
        struct samsung_pinctrl_drv_data *drvdata = bank->drvdata;
        unsigned long flags;
        int ret;

        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(drvdata->dev, "failed to enable clock\n");
                return ret;
        }

        raw_spin_lock_irqsave(&bank->slock, flags);
        samsung_gpio_set_value(gc, offset, value);
        raw_spin_unlock_irqrestore(&bank->slock, flags);

        clk_disable(drvdata->pclk);

        return 0;
}

/* gpiolib gpio_get callback function */
static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset)
{
        const void __iomem *reg;
        u32 data;
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);
        const struct samsung_pin_bank_type *type = bank->type;
        struct samsung_pinctrl_drv_data *drvdata = bank->drvdata;
        int ret;

        reg = bank->pctl_base + bank->pctl_offset;

        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(drvdata->dev, "failed to enable clock\n");
                return ret;
        }

        data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
        data >>= offset;
        data &= 1;

        clk_disable(drvdata->pclk);

        return data;
}

/*
 * The samsung_gpio_set_direction() should be called with "bank->slock" held
 * to avoid race condition.
 * 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)
{
        const struct samsung_pin_bank_type *type;
        struct samsung_pin_bank *bank;
        void __iomem *reg;
        u32 data, mask, shift;

        bank = gpiochip_get_data(gc);
        type = bank->type;

        reg = bank->pctl_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;
        }

        data = readl(reg);
        data &= ~(mask << shift);
        if (!input)
                data |= PIN_CON_FUNC_OUTPUT << shift;
        writel(data, reg);

        return 0;
}

/* gpiolib gpio_direction_input callback function. */
static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);
        struct samsung_pinctrl_drv_data *drvdata = bank->drvdata;
        unsigned long flags;
        int ret;

        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(drvdata->dev, "failed to enable clock\n");
                return ret;
        }

        raw_spin_lock_irqsave(&bank->slock, flags);
        ret = samsung_gpio_set_direction(gc, offset, true);
        raw_spin_unlock_irqrestore(&bank->slock, flags);

        clk_disable(drvdata->pclk);

        return ret;
}

/* gpiolib gpio_direction_output callback function. */
static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
                                                        int value)
{
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);
        struct samsung_pinctrl_drv_data *drvdata = bank->drvdata;
        unsigned long flags;
        int ret;

        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(drvdata->dev, "failed to enable clock\n");
                return ret;
        }

        raw_spin_lock_irqsave(&bank->slock, flags);
        samsung_gpio_set_value(gc, offset, value);
        ret = samsung_gpio_set_direction(gc, offset, false);
        raw_spin_unlock_irqrestore(&bank->slock, flags);

        clk_disable(drvdata->pclk);

        return ret;
}

/*
 * gpiod_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 = gpiochip_get_data(gc);
        unsigned int virq;

        if (!bank->irq_domain)
                return -ENXIO;

        virq = irq_create_mapping(bank->irq_domain, offset);

        return (virq) ? : -ENXIO;
}

static int samsung_add_pin_ranges(struct gpio_chip *gc)
{
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);

        bank->grange.name = bank->name;
        bank->grange.id = bank->id;
        bank->grange.pin_base = bank->pin_base;
        bank->grange.base = gc->base;
        bank->grange.npins = bank->nr_pins;
        bank->grange.gc = &bank->gpio_chip;
        pinctrl_add_gpio_range(bank->drvdata->pctl_dev, &bank->grange);

        return 0;
}

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_kcalloc(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 %pOFn node", func_np);
                return -EINVAL;
        }

        func->name = func_np->full_name;

        func->groups = devm_kcalloc(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 %pOFn node\n",
                                i, func_np);
                        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_property_present(cfg_np,
                            "samsung,pin-function"))
                                continue;
                        ++func_cnt;
                        continue;
                }

                for_each_child_of_node(cfg_np, func_np) {
                        if (!of_property_present(func_np,
                            "samsung,pin-function"))
                                continue;
                        ++func_cnt;
                }
        }

        functions = devm_kcalloc(dev, func_cnt, sizeof(*functions),
                                        GFP_KERNEL);
        if (!functions)
                return ERR_PTR(-ENOMEM);
        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_scoped(dev_np, cfg_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_scoped(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(functions);
        }

        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_kcalloc(&pdev->dev,
                               drvdata->nr_pins, sizeof(*pindesc),
                               GFP_KERNEL);
        if (!pindesc)
                return -ENOMEM;
        ctrldesc->pins = pindesc;
        ctrldesc->npins = drvdata->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;

        /*
         * allocate space for storing the dynamically generated names for all
         * the pins which belong to this pin-controller.
         */
        pin_names = devm_kzalloc(&pdev->dev,
                                 array3_size(sizeof(char), PIN_NAME_LENGTH,
                                             drvdata->nr_pins),
                                 GFP_KERNEL);
        if (!pin_names)
                return -ENOMEM;

        /* for each pin, the name of the pin is pin-bank name + pin number */
        for (bank = 0; bank < drvdata->nr_banks; bank++) {
                pin_bank = &drvdata->pin_banks[bank];
                pin_bank->id = 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;

        ret = devm_pinctrl_register_and_init(&pdev->dev, ctrldesc, drvdata,
                                             &drvdata->pctl_dev);
        if (ret) {
                dev_err(&pdev->dev, "could not register pinctrl driver\n");
                return ret;
        }

        return 0;
}

/* unregister the pinctrl interface with the pinctrl subsystem */
static int samsung_pinctrl_unregister(struct platform_device *pdev,
                                      struct samsung_pinctrl_drv_data *drvdata)
{
        struct samsung_pin_bank *bank = drvdata->pin_banks;
        int i;

        for (i = 0; i < drvdata->nr_banks; ++i, ++bank)
                pinctrl_remove_gpio_range(drvdata->pctl_dev, &bank->grange);

        return 0;
}

static void samsung_pud_value_init(struct samsung_pinctrl_drv_data *drvdata)
{
        unsigned int  *pud_val = drvdata->pud_val;

        pud_val[PUD_PULL_DISABLE] = EXYNOS_PIN_PUD_PULL_DISABLE;
        pud_val[PUD_PULL_DOWN] = EXYNOS_PIN_PID_PULL_DOWN;
        pud_val[PUD_PULL_UP] = EXYNOS_PIN_PID_PULL_UP;
}

/*
 * Enable or Disable the pull-down and pull-up for the gpio pins in the
 * PUD register.
 */
static void samsung_gpio_set_pud(struct gpio_chip *gc, unsigned int offset,
                                 unsigned int value)
{
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);
        const struct samsung_pin_bank_type *type = bank->type;
        void __iomem *reg;
        unsigned int data, mask;

        reg = bank->pctl_base + bank->pctl_offset;
        data = readl(reg + type->reg_offset[PINCFG_TYPE_PUD]);
        mask = (1 << type->fld_width[PINCFG_TYPE_PUD]) - 1;
        data &= ~(mask << (offset * type->fld_width[PINCFG_TYPE_PUD]));
        data |= value << (offset * type->fld_width[PINCFG_TYPE_PUD]);
        writel(data, reg + type->reg_offset[PINCFG_TYPE_PUD]);
}

/*
 * Identify the type of PUD config based on the gpiolib request to enable
 * or disable the PUD config.
 */
static int samsung_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
                                   unsigned long config)
{
        struct samsung_pin_bank *bank = gpiochip_get_data(gc);
        struct samsung_pinctrl_drv_data *drvdata = bank->drvdata;
        unsigned int value;
        int ret = 0;
        unsigned long flags;

        switch (pinconf_to_config_param(config)) {
        case PIN_CONFIG_BIAS_DISABLE:
                value = drvdata->pud_val[PUD_PULL_DISABLE];
                break;
        case PIN_CONFIG_BIAS_PULL_DOWN:
                value = drvdata->pud_val[PUD_PULL_DOWN];
                break;
        case PIN_CONFIG_BIAS_PULL_UP:
                value = drvdata->pud_val[PUD_PULL_UP];
                break;
        default:
                return -ENOTSUPP;
        }

        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(drvdata->dev, "failed to enable clock\n");
                return ret;
        }

        raw_spin_lock_irqsave(&bank->slock, flags);
        samsung_gpio_set_pud(gc, offset, value);
        raw_spin_unlock_irqrestore(&bank->slock, flags);

        clk_disable(drvdata->pclk);

        return ret;
}

static const struct gpio_chip samsung_gpiolib_chip = {
        .request = gpiochip_generic_request,
        .free = gpiochip_generic_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,
        .add_pin_ranges = samsung_add_pin_ranges,
        .set_config = samsung_gpio_set_config,
        .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_bank *bank = drvdata->pin_banks;
        struct gpio_chip *gc;
        int ret;
        int i;

        for (i = 0; i < drvdata->nr_banks; ++i, ++bank) {
                bank->gpio_chip = samsung_gpiolib_chip;

                gc = &bank->gpio_chip;
                gc->base = -1; /* Dynamic allocation */
                gc->ngpio = bank->nr_pins;
                gc->parent = &pdev->dev;
                gc->fwnode = bank->fwnode;
                gc->label = bank->name;

                ret = devm_gpiochip_add_data(&pdev->dev, gc, bank);
                if (ret) {
                        dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
                                                        gc->label, ret);
                        return ret;
                }
        }

        return 0;
}

static const struct samsung_pin_ctrl *
samsung_pinctrl_get_soc_data_for_of_alias(struct platform_device *pdev)
{
        struct device_node *node = pdev->dev.of_node;
        const struct samsung_pinctrl_of_match_data *of_data;
        int id;

        id = of_alias_get_id(node, "pinctrl");
        if (id < 0) {
                dev_err(&pdev->dev, "failed to get alias id\n");
                return NULL;
        }

        of_data = of_device_get_match_data(&pdev->dev);
        if (id >= of_data->num_ctrl) {
                dev_err(&pdev->dev, "invalid alias id %d\n", id);
                return NULL;
        }

        return &(of_data->ctrl[id]);
}

static void samsung_banks_node_put(struct samsung_pinctrl_drv_data *d)
{
        struct samsung_pin_bank *bank;
        unsigned int i;

        bank = d->pin_banks;
        for (i = 0; i < d->nr_banks; ++i, ++bank)
                fwnode_handle_put(bank->fwnode);
}

/*
 * Iterate over all driver pin banks to find one matching the name of node,
 * skipping optional "-gpio" node suffix. When found, assign node to the bank.
 */
static void samsung_banks_node_get(struct device *dev, struct samsung_pinctrl_drv_data *d)
{
        const char *suffix = "-gpio-bank";
        struct samsung_pin_bank *bank;
        struct fwnode_handle *child;
        /* Pin bank names are up to 4 characters */
        char node_name[20];
        unsigned int i;
        size_t len;

        bank = d->pin_banks;
        for (i = 0; i < d->nr_banks; ++i, ++bank) {
                strscpy(node_name, bank->name, sizeof(node_name));
                len = strlcat(node_name, suffix, sizeof(node_name));
                if (len >= sizeof(node_name)) {
                        dev_err(dev, "Too long pin bank name '%s', ignoring\n",
                                bank->name);
                        continue;
                }

                for_each_gpiochip_node(dev, child) {
                        struct device_node *np = to_of_node(child);

                        if (of_node_name_eq(np, node_name))
                                break;
                        if (of_node_name_eq(np, bank->name))
                                break;
                }

                if (child)
                        bank->fwnode = child;
                else
                        dev_warn(dev, "Missing node for bank %s - invalid DTB\n",
                                 bank->name);
                /* child reference dropped in samsung_banks_node_put() */
        }
}

/* retrieve the soc specific data */
static const struct samsung_pin_ctrl *
samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d,
                             struct platform_device *pdev)
{
        const struct samsung_pin_bank_data *bdata;
        const struct samsung_pin_ctrl *ctrl;
        struct samsung_pin_bank *bank;
        struct resource *res;
        void __iomem *virt_base[SAMSUNG_PINCTRL_NUM_RESOURCES];
        unsigned int i;

        ctrl = samsung_pinctrl_get_soc_data_for_of_alias(pdev);
        if (!ctrl)
                return ERR_PTR(-ENOENT);

        d->suspend = ctrl->suspend;
        d->resume = ctrl->resume;
        d->nr_banks = ctrl->nr_banks;
        d->pin_banks = devm_kcalloc(&pdev->dev, d->nr_banks,
                                        sizeof(*d->pin_banks), GFP_KERNEL);
        if (!d->pin_banks)
                return ERR_PTR(-ENOMEM);

        if (ctrl->nr_ext_resources + 1 > SAMSUNG_PINCTRL_NUM_RESOURCES)
                return ERR_PTR(-EINVAL);

        for (i = 0; i < ctrl->nr_ext_resources + 1; i++) {
                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
                if (!res) {
                        dev_err(&pdev->dev, "failed to get mem%d resource\n", i);
                        return ERR_PTR(-EINVAL);
                }
                virt_base[i] = devm_ioremap(&pdev->dev, res->start,
                                                resource_size(res));
                if (!virt_base[i]) {
                        dev_err(&pdev->dev, "failed to ioremap %pR\n", res);
                        return ERR_PTR(-EIO);
                }
        }

        bank = d->pin_banks;
        bdata = ctrl->pin_banks;
        for (i = 0; i < ctrl->nr_banks; ++i, ++bdata, ++bank) {
                bank->type = bdata->type;
                bank->pctl_offset = bdata->pctl_offset;
                bank->nr_pins = bdata->nr_pins;
                bank->eint_func = bdata->eint_func;
                bank->eint_type = bdata->eint_type;
                bank->eint_mask = bdata->eint_mask;
                bank->eint_offset = bdata->eint_offset;
                bank->eint_con_offset = bdata->eint_con_offset;
                bank->eint_mask_offset = bdata->eint_mask_offset;
                bank->eint_pend_offset = bdata->eint_pend_offset;
                bank->eint_fltcon_offset = bdata->eint_fltcon_offset;
                bank->name = bdata->name;

                raw_spin_lock_init(&bank->slock);
                bank->drvdata = d;
                bank->pin_base = d->nr_pins;
                d->nr_pins += bank->nr_pins;

                bank->eint_base = virt_base[0];
                bank->pctl_base = virt_base[bdata->pctl_res_idx];
        }
        /*
         * Legacy platforms should provide only one resource with IO memory.
         * Store it as virt_base because legacy driver needs to access it
         * through samsung_pinctrl_drv_data.
         */
        d->virt_base = virt_base[0];

        samsung_banks_node_get(&pdev->dev, d);

        return ctrl;
}

static int samsung_pinctrl_probe(struct platform_device *pdev)
{
        struct samsung_pinctrl_drv_data *drvdata;
        const struct samsung_pin_ctrl *ctrl;
        struct device *dev = &pdev->dev;
        int ret;

        drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
        if (!drvdata)
                return -ENOMEM;

        ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev);
        if (IS_ERR(ctrl)) {
                dev_err(&pdev->dev, "driver data not available\n");
                return PTR_ERR(ctrl);
        }
        drvdata->dev = dev;

        ret = platform_get_irq_optional(pdev, 0);
        if (ret < 0 && ret != -ENXIO)
                goto err_put_banks;
        if (ret > 0)
                drvdata->irq = ret;

        if (ctrl->retention_data) {
                drvdata->retention_ctrl = ctrl->retention_data->init(drvdata,
                                                          ctrl->retention_data);
                if (IS_ERR(drvdata->retention_ctrl)) {
                        ret = PTR_ERR(drvdata->retention_ctrl);
                        goto err_put_banks;
                }
        }

        drvdata->pclk = devm_clk_get_optional_prepared(dev, "pclk");
        if (IS_ERR(drvdata->pclk)) {
                ret = PTR_ERR(drvdata->pclk);
                goto err_put_banks;
        }

        ret = samsung_pinctrl_register(pdev, drvdata);
        if (ret)
                goto err_put_banks;

        if (ctrl->eint_gpio_init)
                ctrl->eint_gpio_init(drvdata);
        if (ctrl->eint_wkup_init)
                ctrl->eint_wkup_init(drvdata);

        if (ctrl->pud_value_init)
                ctrl->pud_value_init(drvdata);
        else
                samsung_pud_value_init(drvdata);

        ret = samsung_gpiolib_register(pdev, drvdata);
        if (ret)
                goto err_unregister;

        ret = pinctrl_enable(drvdata->pctl_dev);
        if (ret)
                goto err_unregister;

        platform_set_drvdata(pdev, drvdata);

        return 0;

err_unregister:
        samsung_pinctrl_unregister(pdev, drvdata);
err_put_banks:
        samsung_banks_node_put(drvdata);
        return ret;
}

/*
 * samsung_pinctrl_suspend - save pinctrl state for suspend
 *
 * Save data for all banks handled by this device.
 */
static int __maybe_unused samsung_pinctrl_suspend(struct device *dev)
{
        struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
        struct samsung_pin_bank *bank;
        int i;

        i = clk_enable(drvdata->pclk);
        if (i) {
                dev_err(drvdata->dev,
                        "failed to enable clock for saving state\n");
                return i;
        }

        for (i = 0; i < drvdata->nr_banks; i++) {
                bank = &drvdata->pin_banks[i];
                const void __iomem *reg = bank->pctl_base + bank->pctl_offset;
                const u8 *offs = bank->type->reg_offset;
                const 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]);
                }
        }

        for (i = 0; i < drvdata->nr_banks; i++) {
                bank = &drvdata->pin_banks[i];
                if (drvdata->suspend)
                        drvdata->suspend(bank);
        }

        clk_disable(drvdata->pclk);

        if (drvdata->retention_ctrl && drvdata->retention_ctrl->enable)
                drvdata->retention_ctrl->enable(drvdata);

        return 0;
}

/*
 * samsung_pinctrl_resume - restore pinctrl state from suspend
 *
 * 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 int __maybe_unused samsung_pinctrl_resume(struct device *dev)
{
        struct samsung_pinctrl_drv_data *drvdata = dev_get_drvdata(dev);
        struct samsung_pin_bank *bank;
        int ret;
        int i;

        /*
         * enable clock before the callback, as we don't want to have to deal
         * with callback cleanup on clock failures.
         */
        ret = clk_enable(drvdata->pclk);
        if (ret) {
                dev_err(drvdata->dev,
                        "failed to enable clock for restoring state\n");
                return ret;
        }

        for (i = 0; i < drvdata->nr_banks; i++) {
                bank = &drvdata->pin_banks[i];
                if (drvdata->resume)
                        drvdata->resume(bank);
        }

        for (i = 0; i < drvdata->nr_banks; i++) {
                bank = &drvdata->pin_banks[i];
                void __iomem *reg = bank->pctl_base + bank->pctl_offset;
                const u8 *offs = bank->type->reg_offset;
                const 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]);
        }

        clk_disable(drvdata->pclk);

        if (drvdata->retention_ctrl && drvdata->retention_ctrl->disable)
                drvdata->retention_ctrl->disable(drvdata);

        return 0;
}

static const struct of_device_id samsung_pinctrl_dt_match[] = {
#ifdef CONFIG_PINCTRL_EXYNOS_ARM
        { .compatible = "samsung,exynos3250-pinctrl",
                .data = &exynos3250_of_data },
        { .compatible = "samsung,exynos4210-pinctrl",
                .data = &exynos4210_of_data },
        { .compatible = "samsung,exynos4x12-pinctrl",
                .data = &exynos4x12_of_data },
        { .compatible = "samsung,exynos5250-pinctrl",
                .data = &exynos5250_of_data },
        { .compatible = "samsung,exynos5260-pinctrl",
                .data = &exynos5260_of_data },
        { .compatible = "samsung,exynos5410-pinctrl",
                .data = &exynos5410_of_data },
        { .compatible = "samsung,exynos5420-pinctrl",
                .data = &exynos5420_of_data },
        { .compatible = "samsung,s5pv210-pinctrl",
                .data = &s5pv210_of_data },
#endif
#ifdef CONFIG_PINCTRL_EXYNOS_ARM64
        { .compatible = "axis,artpec8-pinctrl",
                .data = &artpec8_of_data },
        { .compatible = "axis,artpec9-pinctrl",
                .data = &artpec9_of_data },
        { .compatible = "google,gs101-pinctrl",
                .data = &gs101_of_data },
        { .compatible = "samsung,exynos2200-pinctrl",
                .data = &exynos2200_of_data },
        { .compatible = "samsung,exynos5433-pinctrl",
                .data = &exynos5433_of_data },
        { .compatible = "samsung,exynos7-pinctrl",
                .data = &exynos7_of_data },
        { .compatible = "samsung,exynos7870-pinctrl",
                .data = &exynos7870_of_data },
        { .compatible = "samsung,exynos7885-pinctrl",
                .data = &exynos7885_of_data },
        { .compatible = "samsung,exynos850-pinctrl",
                .data = &exynos850_of_data },
        { .compatible = "samsung,exynos8890-pinctrl",
                .data = &exynos8890_of_data },
        { .compatible = "samsung,exynos8895-pinctrl",
                .data = &exynos8895_of_data },
        { .compatible = "samsung,exynos9610-pinctrl",
                .data = &exynos9610_of_data },
        { .compatible = "samsung,exynos9810-pinctrl",
                .data = &exynos9810_of_data },
        { .compatible = "samsung,exynos990-pinctrl",
                .data = &exynos990_of_data },
        { .compatible = "samsung,exynosautov9-pinctrl",
                .data = &exynosautov9_of_data },
        { .compatible = "samsung,exynosautov920-pinctrl",
                .data = &exynosautov920_of_data },
        { .compatible = "tesla,fsd-pinctrl",
                .data = &fsd_of_data },
#endif
#ifdef CONFIG_PINCTRL_S3C64XX
        { .compatible = "samsung,s3c64xx-pinctrl",
                .data = &s3c64xx_of_data },
#endif
        {},
};

static const struct dev_pm_ops samsung_pinctrl_pm_ops = {
        SET_LATE_SYSTEM_SLEEP_PM_OPS(samsung_pinctrl_suspend,
                                     samsung_pinctrl_resume)
};

static struct platform_driver samsung_pinctrl_driver = {
        .probe          = samsung_pinctrl_probe,
        .driver = {
                .name   = "samsung-pinctrl",
                .of_match_table = samsung_pinctrl_dt_match,
                .suppress_bind_attrs = true,
                .pm = &samsung_pinctrl_pm_ops,
        },
};

static int __init samsung_pinctrl_drv_register(void)
{
        return platform_driver_register(&samsung_pinctrl_driver);
}
postcore_initcall(samsung_pinctrl_drv_register);