--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek Pinctrl Paris Driver, which implement the vendor per-pin
+ * bindings for MediaTek SoC.
+ *
+ * Copyright (C) 2018 MediaTek Inc.
+ * Author: Sean Wang <sean.wang@mediatek.com>
+ * Zhiyong Tao <zhiyong.tao@mediatek.com>
+ * Hongzhou.Yang <hongzhou.yang@mediatek.com>
+ */
+
+#include <dt-bindings/pinctrl/mt65xx.h>
+#include "pinctrl-paris.h"
+
+#define PINCTRL_PINCTRL_DEV KBUILD_MODNAME
+
+/* Custom pinconf parameters */
+#define MTK_PIN_CONFIG_TDSEL (PIN_CONFIG_END + 1)
+#define MTK_PIN_CONFIG_RDSEL (PIN_CONFIG_END + 2)
+#define MTK_PIN_CONFIG_PU_ADV (PIN_CONFIG_END + 3)
+#define MTK_PIN_CONFIG_PD_ADV (PIN_CONFIG_END + 4)
+
+static const struct pinconf_generic_params mtk_custom_bindings[] = {
+ {"mediatek,tdsel", MTK_PIN_CONFIG_TDSEL, 0},
+ {"mediatek,rdsel", MTK_PIN_CONFIG_RDSEL, 0},
+ {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV, 1},
+ {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV, 1},
+};
+
+#ifdef CONFIG_DEBUG_FS
+static const struct pin_config_item mtk_conf_items[] = {
+ PCONFDUMP(MTK_PIN_CONFIG_TDSEL, "tdsel", NULL, true),
+ PCONFDUMP(MTK_PIN_CONFIG_RDSEL, "rdsel", NULL, true),
+ PCONFDUMP(MTK_PIN_CONFIG_PU_ADV, "pu-adv", NULL, true),
+ PCONFDUMP(MTK_PIN_CONFIG_PD_ADV, "pd-adv", NULL, true),
+};
+#endif
+
+static const char * const mtk_gpio_functions[] = {
+ "func0", "func1", "func2", "func3",
+ "func4", "func5", "func6", "func7",
+ "func8", "func9", "func10", "func11",
+ "func12", "func13", "func14", "func15",
+};
+
+static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ const struct mtk_pin_desc *desc;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
+
+ return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
+ hw->soc->gpio_m);
+}
+
+static int mtk_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin, bool input)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ const struct mtk_pin_desc *desc;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
+
+ /* hardware would take 0 as input direction */
+ return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input);
+}
+
+static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *config)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ u32 param = pinconf_to_config_param(*config);
+ int val, val2, err, reg, ret = 1;
+ const struct mtk_pin_desc *desc;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (hw->soc->bias_disable_get) {
+ err = hw->soc->bias_disable_get(hw, desc, &ret);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (hw->soc->bias_get) {
+ err = hw->soc->bias_get(hw, desc, 1, &ret);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (hw->soc->bias_get) {
+ err = hw->soc->bias_get(hw, desc, 0, &ret);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &val);
+ if (err)
+ return err;
+
+ if (!val)
+ return -EINVAL;
+
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ case PIN_CONFIG_OUTPUT_ENABLE:
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val);
+ if (err)
+ return err;
+
+ /* HW takes input mode as zero; output mode as non-zero */
+ if ((val && param == PIN_CONFIG_INPUT_ENABLE) ||
+ (!val && param == PIN_CONFIG_OUTPUT_ENABLE))
+ return -EINVAL;
+
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val);
+ if (err)
+ return err;
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &val2);
+ if (err)
+ return err;
+
+ if (val || !val2)
+ return -EINVAL;
+
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ if (hw->soc->drive_get) {
+ err = hw->soc->drive_get(hw, desc, &ret);
+ if (err)
+ return err;
+ } else {
+ err = -ENOTSUPP;
+ }
+ break;
+ case MTK_PIN_CONFIG_TDSEL:
+ case MTK_PIN_CONFIG_RDSEL:
+ reg = (param == MTK_PIN_CONFIG_TDSEL) ?
+ PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
+
+ err = mtk_hw_get_value(hw, desc, reg, &val);
+ if (err)
+ return err;
+
+ ret = val;
+
+ break;
+ case MTK_PIN_CONFIG_PU_ADV:
+ case MTK_PIN_CONFIG_PD_ADV:
+ if (hw->soc->adv_pull_get) {
+ bool pullup;
+
+ pullup = param == MTK_PIN_CONFIG_PU_ADV;
+ err = hw->soc->adv_pull_get(hw, desc, pullup, &ret);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, ret);
+
+ return 0;
+}
+
+static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ enum pin_config_param param,
+ enum pin_config_param arg)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ const struct mtk_pin_desc *desc;
+ int err = 0;
+ u32 reg;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
+
+ switch ((u32)param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (hw->soc->bias_disable_set) {
+ err = hw->soc->bias_disable_set(hw, desc);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (hw->soc->bias_set) {
+ err = hw->soc->bias_set(hw, desc, 1);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (hw->soc->bias_set) {
+ err = hw->soc->bias_set(hw, desc, 0);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ case PIN_CONFIG_OUTPUT_ENABLE:
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
+ MTK_DISABLE);
+ if (err)
+ goto err;
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
+ MTK_OUTPUT);
+ if (err)
+ goto err;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ if (hw->soc->ies_present) {
+ mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES,
+ MTK_ENABLE);
+ }
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
+ MTK_INPUT);
+ if (err)
+ goto err;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR,
+ arg);
+ if (err)
+ goto err;
+
+ break;
+ case PIN_CONFIG_OUTPUT:
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
+ MTK_OUTPUT);
+ if (err)
+ goto err;
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO,
+ arg);
+ if (err)
+ goto err;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ /* arg = 1: Input mode & SMT enable ;
+ * arg = 0: Output mode & SMT disable
+ */
+ arg = arg ? 2 : 1;
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
+ arg & 1);
+ if (err)
+ goto err;
+
+ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
+ !!(arg & 2));
+ if (err)
+ goto err;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ if (hw->soc->drive_set) {
+ err = hw->soc->drive_set(hw, desc, arg);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ case MTK_PIN_CONFIG_TDSEL:
+ case MTK_PIN_CONFIG_RDSEL:
+ reg = (param == MTK_PIN_CONFIG_TDSEL) ?
+ PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
+
+ err = mtk_hw_set_value(hw, desc, reg, arg);
+ if (err)
+ goto err;
+ break;
+ case MTK_PIN_CONFIG_PU_ADV:
+ case MTK_PIN_CONFIG_PD_ADV:
+ if (hw->soc->adv_pull_set) {
+ bool pullup;
+
+ pullup = param == MTK_PIN_CONFIG_PU_ADV;
+ err = hw->soc->adv_pull_set(hw, desc, pullup,
+ arg);
+ if (err)
+ return err;
+ } else {
+ return -ENOTSUPP;
+ }
+ break;
+ default:
+ err = -ENOTSUPP;
+ }
+
+err:
+ return err;
+}
+
+static struct mtk_pinctrl_group *
+mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *hw, u32 pin)
+{
+ int i;
+
+ for (i = 0; i < hw->soc->ngrps; i++) {
+ struct mtk_pinctrl_group *grp = hw->groups + i;
+
+ if (grp->pin == pin)
+ return grp;
+ }
+
+ return NULL;
+}
+
+static const struct mtk_func_desc *
+mtk_pctrl_find_function_by_pin(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum)
+{
+ const struct mtk_pin_desc *pin = hw->soc->pins + pin_num;
+ const struct mtk_func_desc *func = pin->funcs;
+
+ while (func && func->name) {
+ if (func->muxval == fnum)
+ return func;
+ func++;
+ }
+
+ return NULL;
+}
+
+static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *hw, u32 pin_num,
+ u32 fnum)
+{
+ int i;
+
+ for (i = 0; i < hw->soc->npins; i++) {
+ const struct mtk_pin_desc *pin = hw->soc->pins + i;
+
+ if (pin->number == pin_num) {
+ const struct mtk_func_desc *func = pin->funcs;
+
+ while (func && func->name) {
+ if (func->muxval == fnum)
+ return true;
+ func++;
+ }
+
+ break;
+ }
+ }
+
+ return false;
+}
+
+static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
+ u32 pin, u32 fnum,
+ struct mtk_pinctrl_group *grp,
+ struct pinctrl_map **map,
+ unsigned *reserved_maps,
+ unsigned *num_maps)
+{
+ bool ret;
+
+ if (*num_maps == *reserved_maps)
+ return -ENOSPC;
+
+ (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
+ (*map)[*num_maps].data.mux.group = grp->name;
+
+ ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
+ if (!ret) {
+ dev_err(pctl->dev, "invalid function %d on pin %d .\n",
+ fnum, pin);
+ return -EINVAL;
+ }
+
+ (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
+ (*num_maps)++;
+
+ return 0;
+}
+
+static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *node,
+ struct pinctrl_map **map,
+ unsigned *reserved_maps,
+ unsigned *num_maps)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ int num_pins, num_funcs, maps_per_pin, i, err;
+ struct mtk_pinctrl_group *grp;
+ unsigned int num_configs;
+ bool has_config = false;
+ unsigned long *configs;
+ u32 pinfunc, pin, func;
+ struct property *pins;
+ unsigned reserve = 0;
+
+ pins = of_find_property(node, "pinmux", NULL);
+ if (!pins) {
+ dev_err(hw->dev, "missing pins property in node %s .\n",
+ node->name);
+ return -EINVAL;
+ }
+
+ err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
+ &num_configs);
+ if (err)
+ return err;
+
+ if (num_configs)
+ has_config = true;
+
+ num_pins = pins->length / sizeof(u32);
+ num_funcs = num_pins;
+ maps_per_pin = 0;
+ if (num_funcs)
+ maps_per_pin++;
+ if (has_config && num_pins >= 1)
+ maps_per_pin++;
+
+ if (!num_pins || !maps_per_pin) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ reserve = num_pins * maps_per_pin;
+
+ err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps,
+ reserve);
+ if (err < 0)
+ goto exit;
+
+ for (i = 0; i < num_pins; i++) {
+ err = of_property_read_u32_index(node, "pinmux", i, &pinfunc);
+ if (err)
+ goto exit;
+
+ pin = MTK_GET_PIN_NO(pinfunc);
+ func = MTK_GET_PIN_FUNC(pinfunc);
+
+ if (pin >= hw->soc->npins ||
+ func >= ARRAY_SIZE(mtk_gpio_functions)) {
+ dev_err(hw->dev, "invalid pins value.\n");
+ err = -EINVAL;
+ goto exit;
+ }
+
+ grp = mtk_pctrl_find_group_by_pin(hw, pin);
+ if (!grp) {
+ dev_err(hw->dev, "unable to match pin %d to group\n",
+ pin);
+ err = -EINVAL;
+ goto exit;
+ }
+
+ err = mtk_pctrl_dt_node_to_map_func(hw, pin, func, grp, map,
+ reserved_maps, num_maps);
+ if (err < 0)
+ goto exit;
+
+ if (has_config) {
+ err = pinctrl_utils_add_map_configs(pctldev, map,
+ reserved_maps,
+ num_maps,
+ grp->name,
+ configs,
+ num_configs,
+ PIN_MAP_TYPE_CONFIGS_GROUP);
+ if (err < 0)
+ goto exit;
+ }
+ }
+
+ err = 0;
+
+exit:
+ kfree(configs);
+ return err;
+}
+
+static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np_config,
+ struct pinctrl_map **map,
+ unsigned *num_maps)
+{
+ struct device_node *np;
+ unsigned reserved_maps;
+ int ret;
+
+ *map = NULL;
+ *num_maps = 0;
+ reserved_maps = 0;
+
+ for_each_child_of_node(np_config, np) {
+ ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
+ &reserved_maps,
+ num_maps);
+ if (ret < 0) {
+ pinctrl_utils_free_map(pctldev, *map, *num_maps);
+ of_node_put(np);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+
+ return hw->soc->ngrps;
+}
+
+static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned group)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+
+ return hw->groups[group].name;
+}
+
+static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned group, const unsigned **pins,
+ unsigned *num_pins)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = (unsigned *)&hw->groups[group].pin;
+ *num_pins = 1;
+
+ return 0;
+}
+
+static const struct pinctrl_ops mtk_pctlops = {
+ .dt_node_to_map = mtk_pctrl_dt_node_to_map,
+ .dt_free_map = pinctrl_utils_free_map,
+ .get_groups_count = mtk_pctrl_get_groups_count,
+ .get_group_name = mtk_pctrl_get_group_name,
+ .get_group_pins = mtk_pctrl_get_group_pins,
+};
+
+static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
+{
+ return ARRAY_SIZE(mtk_gpio_functions);
+}
+
+static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ return mtk_gpio_functions[selector];
+}
+
+static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
+ unsigned function,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = hw->grp_names;
+ *num_groups = hw->soc->ngrps;
+
+ return 0;
+}
+
+static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
+ unsigned function,
+ unsigned group)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ struct mtk_pinctrl_group *grp = hw->groups + group;
+ const struct mtk_func_desc *desc_func;
+ const struct mtk_pin_desc *desc;
+ bool ret;
+
+ ret = mtk_pctrl_is_function_valid(hw, grp->pin, function);
+ if (!ret) {
+ dev_err(hw->dev, "invalid function %d on group %d .\n",
+ function, group);
+ return -EINVAL;
+ }
+
+ desc_func = mtk_pctrl_find_function_by_pin(hw, grp->pin, function);
+ if (!desc_func)
+ return -EINVAL;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[grp->pin];
+ mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval);
+
+ return 0;
+}
+
+static const struct pinmux_ops mtk_pmxops = {
+ .get_functions_count = mtk_pmx_get_funcs_cnt,
+ .get_function_name = mtk_pmx_get_func_name,
+ .get_function_groups = mtk_pmx_get_func_groups,
+ .set_mux = mtk_pmx_set_mux,
+ .gpio_set_direction = mtk_pinmux_gpio_set_direction,
+ .gpio_request_enable = mtk_pinmux_gpio_request_enable,
+};
+
+static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group,
+ unsigned long *config)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+
+ *config = hw->groups[group].config;
+
+ return 0;
+}
+
+static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
+ unsigned long *configs, unsigned num_configs)
+{
+ struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+ struct mtk_pinctrl_group *grp = &hw->groups[group];
+ int i, ret;
+
+ for (i = 0; i < num_configs; i++) {
+ ret = mtk_pinconf_set(pctldev, grp->pin,
+ pinconf_to_config_param(configs[i]),
+ pinconf_to_config_argument(configs[i]));
+ if (ret < 0)
+ return ret;
+
+ grp->config = configs[i];
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops mtk_confops = {
+ .pin_config_get = mtk_pinconf_get,
+ .pin_config_group_get = mtk_pconf_group_get,
+ .pin_config_group_set = mtk_pconf_group_set,
+};
+
+static struct pinctrl_desc mtk_desc = {
+ .name = PINCTRL_PINCTRL_DEV,
+ .pctlops = &mtk_pctlops,
+ .pmxops = &mtk_pmxops,
+ .confops = &mtk_confops,
+ .owner = THIS_MODULE,
+};
+
+static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
+{
+ struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+ const struct mtk_pin_desc *desc;
+ int value, err;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value);
+ if (err)
+ return err;
+
+ return !value;
+}
+
+static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
+{
+ struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+ const struct mtk_pin_desc *desc;
+ int value, err;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
+
+ err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
+ if (err)
+ return err;
+
+ return !!value;
+}
+
+static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
+{
+ struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+ const struct mtk_pin_desc *desc;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
+
+ mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
+}
+
+static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio)
+{
+ return pinctrl_gpio_direction_input(chip->base + gpio);
+}
+
+static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
+ int value)
+{
+ mtk_gpio_set(chip, gpio, value);
+
+ return pinctrl_gpio_direction_output(chip->base + gpio);
+}
+
+static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+ unsigned long config)
+{
+ struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+ const struct mtk_pin_desc *desc;
+ u32 debounce;
+
+ desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
+
+ if (!hw->eint ||
+ pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||
+ desc->eint.eint_n == EINT_NA)
+ return -ENOTSUPP;
+
+ debounce = pinconf_to_config_argument(config);
+
+ return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce);
+}
+
+static int mtk_build_gpiochip(struct mtk_pinctrl *hw, struct device_node *np)
+{
+ struct gpio_chip *chip = &hw->chip;
+ int ret;
+
+ chip->label = PINCTRL_PINCTRL_DEV;
+ chip->parent = hw->dev;
+ chip->request = gpiochip_generic_request;
+ chip->free = gpiochip_generic_free;
+ chip->get_direction = mtk_gpio_get_direction;
+ chip->direction_input = mtk_gpio_direction_input;
+ chip->direction_output = mtk_gpio_direction_output;
+ chip->get = mtk_gpio_get;
+ chip->set = mtk_gpio_set;
+ chip->set_config = mtk_gpio_set_config,
+ chip->base = -1;
+ chip->ngpio = hw->soc->npins;
+ chip->of_node = np;
+ chip->of_gpio_n_cells = 2;
+
+ ret = gpiochip_add_data(chip, hw);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int mtk_pctrl_build_state(struct platform_device *pdev)
+{
+ struct mtk_pinctrl *hw = platform_get_drvdata(pdev);
+ int i;
+
+ /* Allocate groups */
+ hw->groups = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
+ sizeof(*hw->groups), GFP_KERNEL);
+ if (!hw->groups)
+ return -ENOMEM;
+
+ /* We assume that one pin is one group, use pin name as group name. */
+ hw->grp_names = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps,
+ sizeof(*hw->grp_names), GFP_KERNEL);
+ if (!hw->grp_names)
+ return -ENOMEM;
+
+ for (i = 0; i < hw->soc->npins; i++) {
+ const struct mtk_pin_desc *pin = hw->soc->pins + i;
+ struct mtk_pinctrl_group *group = hw->groups + i;
+
+ group->name = pin->name;
+ group->pin = pin->number;
+
+ hw->grp_names[i] = pin->name;
+ }
+
+ return 0;
+}
+
+int mtk_paris_pinctrl_probe(struct platform_device *pdev,
+ const struct mtk_pin_soc *soc)
+{
+ struct pinctrl_pin_desc *pins;
+ struct mtk_pinctrl *hw;
+ struct resource *res;
+ int err, i;
+
+ hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
+ if (!hw)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, hw);
+ hw->soc = soc;
+ hw->dev = &pdev->dev;
+
+ if (!hw->soc->nbase_names) {
+ dev_err(&pdev->dev,
+ "SoC should be assigned at least one register base\n");
+ return -EINVAL;
+ }
+
+ hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names,
+ sizeof(*hw->base), GFP_KERNEL);
+ if (IS_ERR(hw->base))
+ return PTR_ERR(hw->base);
+
+ for (i = 0; i < hw->soc->nbase_names; i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ hw->soc->base_names[i]);
+ if (!res) {
+ dev_err(&pdev->dev, "missing IO resource\n");
+ return -ENXIO;
+ }
+
+ hw->base[i] = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hw->base[i]))
+ return PTR_ERR(hw->base[i]);
+ }
+
+ hw->nbase = hw->soc->nbase_names;
+
+ err = mtk_pctrl_build_state(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "build state failed: %d\n", err);
+ return -EINVAL;
+ }
+
+ /* Copy from internal struct mtk_pin_desc to register to the core */
+ pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins),
+ GFP_KERNEL);
+ if (IS_ERR(pins))
+ return PTR_ERR(pins);
+
+ for (i = 0; i < hw->soc->npins; i++) {
+ pins[i].number = hw->soc->pins[i].number;
+ pins[i].name = hw->soc->pins[i].name;
+ }
+
+ /* Setup pins descriptions per SoC types */
+ mtk_desc.pins = (const struct pinctrl_pin_desc *)pins;
+ mtk_desc.npins = hw->soc->npins;
+ mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings);
+ mtk_desc.custom_params = mtk_custom_bindings;
+#ifdef CONFIG_DEBUG_FS
+ mtk_desc.custom_conf_items = mtk_conf_items;
+#endif
+
+ err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw,
+ &hw->pctrl);
+ if (err)
+ return err;
+
+ err = pinctrl_enable(hw->pctrl);
+ if (err)
+ return err;
+
+ /* Build gpiochip should be after pinctrl_enable is done */
+ err = mtk_build_gpiochip(hw, pdev->dev.of_node);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to add gpio_chip\n");
+ return err;
+ }
+
+ platform_set_drvdata(pdev, hw);
+
+ return 0;
+}
projects / linux.git / commitdiff