diff options
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-paris.c')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-paris.c | 906 |
1 files changed, 906 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c new file mode 100644 index 000000000000..9f4224f9d605 --- /dev/null +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -0,0 +1,906 @@ +// 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_to_irq(struct gpio_chip *chip, unsigned int offset) +{ + struct mtk_pinctrl *hw = gpiochip_get_data(chip); + const struct mtk_pin_desc *desc; + + if (!hw->eint) + return -ENOTSUPP; + + desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset]; + + if (desc->eint.eint_n == EINT_NA) + return -ENOTSUPP; + + return mtk_eint_find_irq(hw->eint, desc->eint.eint_n); +} + +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->to_irq = mtk_gpio_to_irq, + 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; + + err = mtk_build_eint(hw, pdev); + if (err) + dev_warn(&pdev->dev, + "Failed to add EINT, but pinctrl still can work\n"); + + /* 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; +} |
