[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/pinctrl/samsung/pinctrl-samsung.c b/src/kernel/linux/v4.14/drivers/pinctrl/samsung/pinctrl-samsung.c
new file mode 100644
index 0000000..7c0f5d4
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -0,0 +1,1277 @@
+/*
+ * 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/init.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/of_device.h>
+#include <linux/spinlock.h>
+
+#include <dt-bindings/pinctrl/samsung.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 unsigned int pin_base;
+
+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(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;
+ 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);
+ of_node_put(np);
+ 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->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 void 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;
+
+ 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->pin_base,
+ ®, &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);
+ 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_set_mux(struct pinctrl_dev *pctldev,
+ unsigned selector,
+ unsigned group)
+{
+ samsung_pinmux_setup(pctldev, selector, group);
+ 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,
+ .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;
+
+ drvdata = pinctrl_dev_get_drvdata(pctldev);
+ pin_to_reg_bank(drvdata, pin - drvdata->pin_base, ®_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,
+};
+
+/*
+ * 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 void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
+{
+ struct samsung_pin_bank *bank = gpiochip_get_data(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->slock, flags);
+ samsung_gpio_set_value(gc, offset, value);
+ 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 = gpiochip_get_data(gc);
+ const struct samsung_pin_bank_type *type = bank->type;
+
+ reg = bank->pctl_base + bank->pctl_offset;
+
+ data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
+ data >>= offset;
+ data &= 1;
+ 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 |= EXYNOS_PIN_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);
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&bank->slock, flags);
+ ret = samsung_gpio_set_direction(gc, offset, true);
+ spin_unlock_irqrestore(&bank->slock, flags);
+ 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);
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&bank->slock, flags);
+ samsung_gpio_set_value(gc, offset, value);
+ ret = samsung_gpio_set_direction(gc, offset, false);
+ spin_unlock_irqrestore(&bank->slock, flags);
+
+ return ret;
+}
+
+/*
+ * 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 = 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 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 %pOFn node", func_np);
+ 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 %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_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)
+ 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(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) {
+ of_node_put(cfg_np);
+ 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) {
+ of_node_put(func_np);
+ of_node_put(cfg_np);
+ 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_kzalloc(&pdev->dev, sizeof(*pindesc) *
+ drvdata->nr_pins, 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 + drvdata->pin_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->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];
+ 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 = devm_pinctrl_register(&pdev->dev, ctrldesc,
+ drvdata);
+ if (IS_ERR(drvdata->pctl_dev)) {
+ dev_err(&pdev->dev, "could not register pinctrl driver\n");
+ return PTR_ERR(drvdata->pctl_dev);
+ }
+
+ for (bank = 0; bank < drvdata->nr_banks; ++bank) {
+ pin_bank = &drvdata->pin_banks[bank];
+ pin_bank->grange.name = pin_bank->name;
+ pin_bank->grange.id = bank;
+ pin_bank->grange.pin_base = drvdata->pin_base
+ + pin_bank->pin_base;
+ pin_bank->grange.base = pin_bank->grange.pin_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;
+}
+
+/* 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 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,
+ .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 = bank->grange.base;
+ gc->ngpio = bank->nr_pins;
+ gc->parent = &pdev->dev;
+ gc->of_node = bank->of_node;
+ 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]);
+}
+
+/* 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)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct device_node *np;
+ 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->name = bdata->name;
+
+ 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];
+
+ for_each_child_of_node(node, np) {
+ if (!of_find_property(np, "gpio-controller", NULL))
+ continue;
+ bank = d->pin_banks;
+ for (i = 0; i < d->nr_banks; ++i, ++bank) {
+ if (!strcmp(bank->name, np->name)) {
+ bank->of_node = np;
+ break;
+ }
+ }
+ }
+
+ d->pin_base = pin_base;
+ pin_base += d->nr_pins;
+
+ 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;
+ struct resource *res;
+ 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;
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (res)
+ drvdata->irq = res->start;
+
+ if (ctrl->retention_data) {
+ drvdata->retention_ctrl = ctrl->retention_data->init(drvdata,
+ ctrl->retention_data);
+ if (IS_ERR(drvdata->retention_ctrl))
+ return PTR_ERR(drvdata->retention_ctrl);
+ }
+
+ ret = samsung_pinctrl_register(pdev, drvdata);
+ if (ret)
+ return ret;
+
+ ret = samsung_gpiolib_register(pdev, drvdata);
+ if (ret) {
+ samsung_pinctrl_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);
+
+ return 0;
+}
+
+/**
+ * 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);
+ int i;
+
+ for (i = 0; i < drvdata->nr_banks; i++) {
+ struct samsung_pin_bank *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;
+
+ 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 (drvdata->suspend)
+ drvdata->suspend(drvdata);
+ 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);
+ int i;
+
+ if (drvdata->resume)
+ drvdata->resume(drvdata);
+
+ for (i = 0; i < drvdata->nr_banks; i++) {
+ struct samsung_pin_bank *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]);
+ }
+
+ 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 = "samsung,exynos5433-pinctrl",
+ .data = &exynos5433_of_data },
+ { .compatible = "samsung,exynos7-pinctrl",
+ .data = &exynos7_of_data },
+#endif
+#ifdef CONFIG_PINCTRL_S3C64XX
+ { .compatible = "samsung,s3c64xx-pinctrl",
+ .data = &s3c64xx_of_data },
+#endif
+#ifdef CONFIG_PINCTRL_S3C24XX
+ { .compatible = "samsung,s3c2412-pinctrl",
+ .data = &s3c2412_of_data },
+ { .compatible = "samsung,s3c2416-pinctrl",
+ .data = &s3c2416_of_data },
+ { .compatible = "samsung,s3c2440-pinctrl",
+ .data = &s3c2440_of_data },
+ { .compatible = "samsung,s3c2450-pinctrl",
+ .data = &s3c2450_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);