linux/drivers/pinctrl/mediatek/pinctrl-paris.c

908 lines
21 KiB
C

// 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 <linux/gpio/driver.h>
#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 %pOFn .\n",
node);
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 (!hw->base)
return -ENOMEM;
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 (!pins)
return -ENOMEM;
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;
}