path: root/drivers/pinctrl/airoha/pinctrl-airoha.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Author: Lorenzo Bianconi <[email protected]>
 * Author: Benjamin Larsson <[email protected]>
 * Author: Markus Gothe <[email protected]>
 * Author: Mikhail Kshevetskiy <[email protected]>
 */
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/ofnode.h>
#include <asm-generic/gpio.h>
#include <asm/arch/scu-regmap.h>
#include <dt-bindings/pinctrl/mt65xx.h>
#include <regmap.h>
#include <syscon.h>

#include "airoha-common.h"

#define airoha_pinctrl_get_pullup_conf(pinctrl, pin, val)			\
	airoha_pinctrl_get_conf((pinctrl), AIROHA_PINCTRL_CONFS_PULLUP,		\
				(pin), (val))
#define airoha_pinctrl_get_pulldown_conf(pinctrl, pin, val)			\
	airoha_pinctrl_get_conf((pinctrl), AIROHA_PINCTRL_CONFS_PULLDOWN,	\
				(pin), (val))
#define airoha_pinctrl_get_drive_e2_conf(pinctrl, pin, val)			\
	airoha_pinctrl_get_conf((pinctrl), AIROHA_PINCTRL_CONFS_DRIVE_E2,	\
				(pin), (val))
#define airoha_pinctrl_get_drive_e4_conf(pinctrl, pin, val)			\
	airoha_pinctrl_get_conf((pinctrl), AIROHA_PINCTRL_CONFS_DRIVE_E4,	\
				(pin), (val))
#define airoha_pinctrl_get_pcie_rst_od_conf(pinctrl, pin, val)			\
	airoha_pinctrl_get_conf((pinctrl), AIROHA_PINCTRL_CONFS_PCIE_RST_OD,	\
				(pin), (val))
#define airoha_pinctrl_set_pullup_conf(pinctrl, pin, val)			\
	airoha_pinctrl_set_conf((pinctrl), AIROHA_PINCTRL_CONFS_PULLUP,		\
				(pin), (val))
#define airoha_pinctrl_set_pulldown_conf(pinctrl, pin, val)			\
	airoha_pinctrl_set_conf((pinctrl), AIROHA_PINCTRL_CONFS_PULLDOWN,	\
				(pin), (val))
#define airoha_pinctrl_set_drive_e2_conf(pinctrl, pin, val)			\
	airoha_pinctrl_set_conf((pinctrl), AIROHA_PINCTRL_CONFS_DRIVE_E2,	\
				(pin), (val))
#define airoha_pinctrl_set_drive_e4_conf(pinctrl, pin, val)			\
	airoha_pinctrl_set_conf((pinctrl), AIROHA_PINCTRL_CONFS_DRIVE_E4,	\
				(pin), (val))
#define airoha_pinctrl_set_pcie_rst_od_conf(pinctrl, pin, val)			\
	airoha_pinctrl_set_conf((pinctrl), AIROHA_PINCTRL_CONFS_PCIE_RST_OD,	\
				(pin), (val))

static const u32 gpio_data_regs[] = {
	REG_GPIO_DATA,
	REG_GPIO_DATA1
};

static const u32 gpio_out_regs[] = {
	REG_GPIO_OE,
	REG_GPIO_OE1
};

static const u32 gpio_dir_regs[] = {
	REG_GPIO_CTRL,
	REG_GPIO_CTRL1,
	REG_GPIO_CTRL2,
	REG_GPIO_CTRL3
};

static const u32 irq_status_regs[] = {
	REG_GPIO_INT,
	REG_GPIO_INT1
};

static const u32 irq_level_regs[] = {
	REG_GPIO_INT_LEVEL,
	REG_GPIO_INT_LEVEL1,
	REG_GPIO_INT_LEVEL2,
	REG_GPIO_INT_LEVEL3
};

static const u32 irq_edge_regs[] = {
	REG_GPIO_INT_EDGE,
	REG_GPIO_INT_EDGE1,
	REG_GPIO_INT_EDGE2,
	REG_GPIO_INT_EDGE3
};

static int pin_in_group(unsigned int pin, const struct pingroup *grp)
{
	for (int i = 0; i < grp->npins; i++) {
		if (grp->pins[i] == pin)
			return 1;
	}

	return 0;
}

static int pin_to_gpio(struct airoha_pinctrl *pinctrl, unsigned int pin)
{
	struct airoha_pinctrl_match_data *data = pinctrl->data;

	if (pin < data->gpio_offs ||
	    pin >= data->gpio_offs + data->gpio_pin_cnt)
		return -EINVAL;

	return pin - data->gpio_offs;
}

/* gpio callbacks */
static int airoha_gpio_set(struct airoha_pinctrl *pinctrl, unsigned int gpio,
			   int value)
{
	u32 offset = gpio % AIROHA_PIN_BANK_SIZE;
	u8 index = gpio / AIROHA_PIN_BANK_SIZE;

	return regmap_update_bits(pinctrl->regmap,
				  pinctrl->gpiochip.data[index],
				  BIT(offset), value ? BIT(offset) : 0);
}

static int airoha_gpio_get(struct airoha_pinctrl *pinctrl, unsigned int gpio)
{
	u32 val, pin = gpio % AIROHA_PIN_BANK_SIZE;
	u8 index = gpio / AIROHA_PIN_BANK_SIZE;
	int err;

	err = regmap_read(pinctrl->regmap,
			  pinctrl->gpiochip.data[index], &val);

	return err ? err : !!(val & BIT(pin));
}

static int airoha_gpio_get_direction(struct airoha_pinctrl *pinctrl, unsigned int gpio)
{
	u32 mask, index, val;
	int err, field_shift;

	field_shift = 2 * (gpio % AIROHA_REG_GPIOCTRL_NUM_PIN);
	mask = GENMASK(field_shift + 1, field_shift);
	index = gpio / AIROHA_REG_GPIOCTRL_NUM_PIN;

	err = regmap_read(pinctrl->regmap,
			  pinctrl->gpiochip.dir[index], &val);
	if (err)
		return err;

	if ((val & mask) > BIT(field_shift))
		return -EINVAL;

	return (val & mask) ? GPIOF_OUTPUT : GPIOF_INPUT;
}

static int airoha_gpio_set_direction(struct airoha_pinctrl *pinctrl,
				     unsigned int gpio, bool input)
{
	u32 mask, index;
	int err, field_shift;

	/* set output enable */
	mask = BIT(gpio % AIROHA_PIN_BANK_SIZE);
	index = gpio / AIROHA_PIN_BANK_SIZE;
	err = regmap_update_bits(pinctrl->regmap, pinctrl->gpiochip.out[index],
				 mask, !input ? mask : 0);
	if (err)
		return err;

	/* set direction */
	field_shift = 2 * (gpio % AIROHA_REG_GPIOCTRL_NUM_PIN);
	mask = GENMASK(field_shift + 1, field_shift);
	index = gpio / AIROHA_REG_GPIOCTRL_NUM_PIN;

	return regmap_update_bits(pinctrl->regmap,
				  pinctrl->gpiochip.dir[index],
				  mask, !input ? BIT(field_shift) : 0);
}

/* pinmux callbacks */
static int airoha_pinmux_set_mux(struct airoha_pinctrl *pinctrl,
				 unsigned int func_selector,
				 unsigned int group_selector)
{
	const struct airoha_pinctrl_func *func;
	const struct pingroup *grp;
	int i;

	func = &pinctrl->data->funcs[func_selector];
	grp = &pinctrl->data->grps[group_selector];

	dev_dbg(pinctrl->dev, "enable function %s group %s\n",
		func->desc.name, grp->name);

	for (i = 0; i < func->group_size; i++) {
		const struct airoha_pinctrl_func_group *group;
		int j;

		group = &func->groups[i];
		if (strcmp(group->name, grp->name))
			continue;

		for (j = 0; j < group->regmap_size; j++) {
			switch (group->regmap[j].mux) {
			case AIROHA_FUNC_PWM_EXT_MUX:
			case AIROHA_FUNC_PWM_MUX:
				regmap_update_bits(pinctrl->regmap,
						   group->regmap[j].offset,
						   group->regmap[j].mask,
						   group->regmap[j].val);
				break;
			default:
				regmap_update_bits(pinctrl->chip_scu,
						   group->regmap[j].offset,
						   group->regmap[j].mask,
						   group->regmap[j].val);
				break;
			}
		}
		return 0;
	}

	return -EINVAL;
}

static int airoha_pinmux_set_direction(struct airoha_pinctrl *pinctrl,
				       unsigned int p, bool input)
{
	int gpio;

	gpio = pin_to_gpio(pinctrl, p);
	if (gpio < 0)
		return gpio;

	return airoha_gpio_set_direction(pinctrl, gpio, input);
}

/* pinconf callbacks */
static const struct airoha_pinctrl_reg *
airoha_pinctrl_get_conf_reg(const struct airoha_pinctrl_conf *conf,
			    int conf_size, int pin)
{
	int i;

	for (i = 0; i < conf_size; i++) {
		if (conf[i].pin == pin)
			return &conf[i].reg;
	}

	return NULL;
}

static int airoha_pinctrl_get_conf(struct airoha_pinctrl *pinctrl,
				   enum airoha_pinctrl_confs_type conf_type,
				   int pin, u32 *val)
{
	const struct airoha_pinctrl_confs_info *confs_info;
	const struct airoha_pinctrl_reg *reg;

	confs_info = &pinctrl->data->confs_info[conf_type];

	reg = airoha_pinctrl_get_conf_reg(confs_info->confs,
					  confs_info->num_confs,
					  pin);
	if (!reg)
		return -EINVAL;

	if (regmap_read(pinctrl->chip_scu, reg->offset, val))
		return -EINVAL;

	*val = field_get(reg->mask, *val);

	return 0;
}

static int airoha_pinctrl_set_conf(struct airoha_pinctrl *pinctrl,
				   enum airoha_pinctrl_confs_type conf_type,
				   int pin, u32 val)
{
	const struct airoha_pinctrl_confs_info *confs_info;
	const struct airoha_pinctrl_reg *reg = NULL;

	confs_info = &pinctrl->data->confs_info[conf_type];

	reg = airoha_pinctrl_get_conf_reg(confs_info->confs,
					  confs_info->num_confs,
					  pin);
	if (!reg)
		return -EINVAL;

	if (regmap_update_bits(pinctrl->chip_scu, reg->offset, reg->mask,
			       field_prep(reg->mask, val)))
		return -EINVAL;

	return 0;
}

static int airoha_pinconf_get_direction(struct airoha_pinctrl *pinctrl, u32 p)
{
	int gpio;

	gpio = pin_to_gpio(pinctrl, p);
	if (gpio < 0)
		return gpio;

	return airoha_gpio_get_direction(pinctrl, gpio);
}

static int airoha_pinconf_get(struct airoha_pinctrl *pinctrl,
			      unsigned int pin, unsigned long *config)
{
	enum pin_config_param param = pinconf_to_config_param(*config);
	u32 arg;

	switch (param) {
	case PIN_CONFIG_BIAS_PULL_DOWN:
	case PIN_CONFIG_BIAS_DISABLE:
	case PIN_CONFIG_BIAS_PULL_UP: {
		u32 pull_up, pull_down;

		if (airoha_pinctrl_get_pullup_conf(pinctrl, pin, &pull_up) ||
		    airoha_pinctrl_get_pulldown_conf(pinctrl, pin, &pull_down))
			return -EINVAL;

		if (param == PIN_CONFIG_BIAS_PULL_UP &&
		    !(pull_up && !pull_down))
			return -EINVAL;
		else if (param == PIN_CONFIG_BIAS_PULL_DOWN &&
			 !(pull_down && !pull_up))
			return -EINVAL;
		else if (pull_up || pull_down)
			return -EINVAL;

		arg = 1;
		break;
	}
	case PIN_CONFIG_DRIVE_STRENGTH: {
		u32 e2, e4;

		if (airoha_pinctrl_get_drive_e2_conf(pinctrl, pin, &e2) ||
		    airoha_pinctrl_get_drive_e4_conf(pinctrl, pin, &e4))
			return -EINVAL;

		arg = e4 << 1 | e2;
		break;
	}
	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
		if (airoha_pinctrl_get_pcie_rst_od_conf(pinctrl, pin, &arg))
			return -EINVAL;
		break;
	case PIN_CONFIG_OUTPUT_ENABLE:
	case PIN_CONFIG_INPUT_ENABLE:
		arg = airoha_pinconf_get_direction(pinctrl, pin);
		if ((param != PIN_CONFIG_OUTPUT_ENABLE || arg != GPIOF_OUTPUT) &&
		    (param != PIN_CONFIG_INPUT_ENABLE || arg != GPIOF_INPUT))
			return -EINVAL;

		arg = 1;
		break;
	default:
		return -EOPNOTSUPP;
	}

	*config = pinconf_to_config_packed(param, arg);

	return 0;
}

static int airoha_pinconf_set_pin_value(struct airoha_pinctrl *pinctrl,
					unsigned int p, bool value)
{
	int gpio;

	gpio = pin_to_gpio(pinctrl, p);
	if (gpio < 0)
		return gpio;

	return airoha_gpio_set(pinctrl, gpio, value);
}

static int airoha_pinconf_set(struct airoha_pinctrl *pinctrl,
			      unsigned int pin, unsigned long *configs,
			      unsigned int num_configs)
{
	int i, err;

	for (i = 0; i < num_configs; i++) {
		u32 param = pinconf_to_config_param(configs[i]);
		u32 arg = pinconf_to_config_argument(configs[i]);

		switch (param) {
		case PIN_CONFIG_BIAS_DISABLE:
			err = airoha_pinctrl_set_pulldown_conf(pinctrl, pin, 0);
			if (err)
				return err;

			err = airoha_pinctrl_set_pullup_conf(pinctrl, pin, 0);
			if (err)
				return err;

			break;

		case PIN_CONFIG_BIAS_PULL_UP:
			err = airoha_pinctrl_set_pulldown_conf(pinctrl, pin, 0);
			if (err)
				return err;

			err = airoha_pinctrl_set_pullup_conf(pinctrl, pin, 1);
			if (err)
				return err;

			break;

		case PIN_CONFIG_BIAS_PULL_DOWN:
			err = airoha_pinctrl_set_pulldown_conf(pinctrl, pin, 1);
			if (err)
				return err;

			err = airoha_pinctrl_set_pullup_conf(pinctrl, pin, 0);
			if (err)
				return err;

			break;

		case PIN_CONFIG_DRIVE_STRENGTH: {
			u32 e2 = 0, e4 = 0;

			switch (arg) {
			case MTK_DRIVE_2mA:
				break;
			case MTK_DRIVE_4mA:
				e2 = 1;
				break;
			case MTK_DRIVE_6mA:
				e4 = 1;
				break;
			case MTK_DRIVE_8mA:
				e2 = 1;
				e4 = 1;
				break;
			default:
				return -EINVAL;
			}

			err = airoha_pinctrl_set_drive_e2_conf(pinctrl, pin, e2);
			if (err)
				return err;

			err = airoha_pinctrl_set_drive_e4_conf(pinctrl, pin, e4);
			if (err)
				return err;

			break;
		}
		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
			err = airoha_pinctrl_set_pcie_rst_od_conf(pinctrl, pin, !!arg);
			if (err)
				return err;

			break;

		case PIN_CONFIG_OUTPUT_ENABLE:
		case PIN_CONFIG_INPUT_ENABLE:
		case PIN_CONFIG_OUTPUT: {
			bool input = param == PIN_CONFIG_INPUT_ENABLE;

			err = airoha_pinmux_set_direction(pinctrl, pin, input);
			if (err)
				return err;

			if (param == PIN_CONFIG_OUTPUT) {
				err = airoha_pinconf_set_pin_value(pinctrl,
								   pin, !!arg);
				if (err)
					return err;
			}

			break;
		}
		default:
			return -EOPNOTSUPP;
		}
	}

	return 0;
}

static int airoha_pinconf_group_set(struct airoha_pinctrl *pinctrl,
				    unsigned int group, unsigned long *configs,
				    unsigned int num_configs)
{
	int i;

	for (i = 0; i < pinctrl->data->grps[group].npins; i++) {
		int err;

		err = airoha_pinconf_set(pinctrl,
					 pinctrl->data->grps[group].pins[i],
					 configs, num_configs);
		if (err)
			return err;
	}

	return 0;
}

static int func_grp_active(struct airoha_pinctrl *pinctrl,
			   const struct airoha_pinctrl_func *func,
			   const char *grp_name)
{
	const struct airoha_pinctrl_func_group *func_grp;
	u32 val, match;
	int ret;

	for (int i = 0; i < func->group_size; i++) {
		if (strcmp(func->groups[i].name, grp_name))
			continue;

		match = 0;
		func_grp = &func->groups[i];
		for (int j = 0; j < func_grp->regmap_size; j++) {
			switch (func_grp->regmap[j].mux) {
			case AIROHA_FUNC_PWM_EXT_MUX:
			case AIROHA_FUNC_PWM_MUX:
				ret = regmap_read(pinctrl->regmap,
						  func_grp->regmap[j].offset,
						  &val);
				break;
			default:
				ret = regmap_read(pinctrl->chip_scu,
						  func_grp->regmap[j].offset,
						  &val);
				break;
			}

			if (ret)
				break;

			if ((val & func_grp->regmap[j].mask) !=
			    func_grp->regmap[j].val)
				break;

			match++;
		}

		return match == func->groups[i].regmap_size;
	}

	return 0;
}

/***********************
 * gpio driver interface
 ***********************/
static int airoha_pinctrl_gpio_set(struct udevice *dev, unsigned int gpio,
				   int value)
{
	return airoha_gpio_set(dev_get_priv(dev->parent), gpio, value);
}

static int airoha_pinctrl_gpio_get(struct udevice *dev, unsigned int gpio)
{
	return airoha_gpio_get(dev_get_priv(dev->parent), gpio);
}

static int airoha_pinctrl_gpio_get_direction(struct udevice *dev,
					     unsigned int gpio)
{
	return airoha_gpio_get_direction(dev_get_priv(dev->parent), gpio);
}

static int airoha_pinctrl_gpio_direction_input(struct udevice *dev,
					       unsigned int gpio)
{
	return airoha_gpio_set_direction(dev_get_priv(dev->parent),
					 gpio, true);
}

static int airoha_pinctrl_gpio_direction_output(struct udevice *dev,
						unsigned int gpio, int val)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev->parent);
	int err;

	err = airoha_gpio_set_direction(pinctrl, gpio, false);
	if (err)
		return err;

	return airoha_gpio_set(pinctrl, gpio, val);
}

static int airoha_pinctrl_gpio_probe(struct udevice *dev)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev->parent);
	struct gpio_dev_priv *uc_priv;

	uc_priv = dev_get_uclass_priv(dev);
	uc_priv->bank_name = "airoha";
	uc_priv->gpio_count = pinctrl->data->gpio_pin_cnt;

	return 0;
}

static int airoha_pinctrl_gpio_bind(struct udevice *dev)
{
	dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND);

	return 0;
}

static const struct dm_gpio_ops airoha_pinctrl_gpio_ops = {
	.set_value = airoha_pinctrl_gpio_set,
	.get_value = airoha_pinctrl_gpio_get,
	.get_function = airoha_pinctrl_gpio_get_direction,
	.direction_input = airoha_pinctrl_gpio_direction_input,
	.direction_output = airoha_pinctrl_gpio_direction_output,
};

static struct driver airoha_pinctrl_gpio_driver = {
	.name = "airoha_pinctrl_gpio",
	.id = UCLASS_GPIO,
	.probe = airoha_pinctrl_gpio_probe,
	.bind = airoha_pinctrl_gpio_bind,
	.ops = &airoha_pinctrl_gpio_ops,
};

static int airoha_pinctrl_gpio_register(struct udevice *parent)
{
	struct uclass_driver *drv;
	ofnode node;
	int ret;

	drv = lists_uclass_lookup(UCLASS_GPIO);
	if (!drv)
		return -ENOENT;

	/*
	 * Support upstream linux DTSI that define gpio-controller
	 * in the root node (instead of a dedicated subnode)
	 */
	if (dev_read_bool(parent, "gpio-controller")) {
		/* upstream DTSI, use current node */
		node = dev_ofnode(parent);
	} else {
		/* legacy DTSI, search for gpio-controller subnode */
		ret = -ENOENT;
		dev_for_each_subnode(node, parent)
			if (ofnode_read_bool(node, "gpio-controller")) {
				ret = 0;
				break;
			}

		if (ret)
			return ret;
	}

	return device_bind_with_driver_data(parent,
					    &airoha_pinctrl_gpio_driver,
					    "airoha_pinctrl_gpio",
					    0, node, NULL);
}

/**************************
 * pinctrl driver interface
 **************************/
static int airoha_get_pins_count(struct udevice *dev)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	return pinctrl->data->num_pins;
}

static const char *airoha_get_pin_name(struct udevice *dev,
				       unsigned int selector)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	return pinctrl->data->pins[selector].name;
}

static int airoha_get_groups_count(struct udevice *dev)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	return pinctrl->data->num_grps;
}

static const char *airoha_get_group_name(struct udevice *dev,
					 unsigned int selector)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	return pinctrl->data->grps[selector].name;
}

static int airoha_get_funcs_count(struct udevice *dev)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	return pinctrl->data->num_funcs;
}

static const char *airoha_get_func_name(struct udevice *dev,
					unsigned int selector)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	return pinctrl->data->funcs[selector].desc.name;
}

static int airoha_pinmux_group_set(struct udevice *dev,
				   unsigned int group_selector,
				   unsigned int func_selector)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	dev_dbg(dev, "enabling %s function for pin group %s\n",
		airoha_get_func_name(dev, func_selector),
		airoha_get_group_name(dev, group_selector));

	return airoha_pinmux_set_mux(pinctrl, func_selector, group_selector);
}

static int airoha_pinmux_set(struct udevice *dev,
			     unsigned int pin_selector,
			     unsigned int func_selector)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);
	const struct airoha_pinctrl_match_data *data = pinctrl->data;
	const char *pin_name;
	unsigned int selector;

	pin_name = data->pins[pin_selector].name;

	/* find group matching the pin_name */
	for (selector = 0; selector < data->num_grps; selector++) {
		if (!strcmp(pin_name, data->grps[selector].name))
			return airoha_pinmux_group_set(dev, selector,
						       func_selector);
	}

	return -ENOENT;
}

static const struct pinconf_param airoha_pinconf_params[] = {
	{ "bias-disable",     PIN_CONFIG_BIAS_DISABLE,     0 },
	{ "bias-pull-up",     PIN_CONFIG_BIAS_PULL_UP,     1 },
	{ "bias-pull-down",   PIN_CONFIG_BIAS_PULL_DOWN,   1 },
	{ "drive-strength",   PIN_CONFIG_DRIVE_STRENGTH,   0 },
	{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
	{ "output-enable",    PIN_CONFIG_OUTPUT_ENABLE,    1 },
	{ "input-enable",     PIN_CONFIG_INPUT_ENABLE,     1 },
};

static const char *airoha_pinconf_param_name(unsigned int param)
{
	for (int i = 0; i < ARRAY_SIZE(airoha_pinconf_params); i++) {
		if (airoha_pinconf_params[i].param == param)
			return airoha_pinconf_params[i].property;
	}

	return NULL;
}

static int airoha_pinconf_set_handler(struct udevice *dev,
				      unsigned pin_selector,
				      unsigned int param,
				      unsigned int argument)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);
	unsigned long configs[1] = { pinconf_to_config_packed(param, argument) };
	unsigned int pin = pinctrl->data->pins[pin_selector].number;

	dev_dbg(dev, "enabling %s=%d property for pin %s\n",
		airoha_pinconf_param_name(param), argument,
		airoha_get_pin_name(dev, pin_selector));

	return airoha_pinconf_set(pinctrl, pin, configs,
				  ARRAY_SIZE(configs));
}

static int airoha_pinconf_group_set_handler(struct udevice *dev,
					    unsigned int group_selector,
					    unsigned int param,
					    unsigned int argument)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);
	unsigned long configs[1] = { pinconf_to_config_packed(param, argument) };

	dev_dbg(dev, "enabling %s=%d property for pin group %s\n",
		airoha_pinconf_param_name(param), argument,
		airoha_get_group_name(dev, group_selector));

	return airoha_pinconf_group_set(pinctrl, group_selector,
					configs, ARRAY_SIZE(configs));
}

static int airoha_get_pin_muxing(struct udevice *dev, unsigned int selector,
				 char *buf, int size)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);
	struct airoha_pinctrl_match_data *data = pinctrl->data;
	const char *name, *type;
	int ret, gpio, found = 0;
	unsigned long config;
	unsigned int param, pin;
	u32 val;

	pin = data->pins[selector].number;
	for (int i = 0; i < data->num_grps; i++) {
		if (!pin_in_group(pin, &data->grps[i]))
			continue;

		name = data->grps[i].name;
		for (int j = 0; j < data->num_funcs; j++) {
			if (!func_grp_active(pinctrl, &data->funcs[j], name))
				continue;

			ret = scnprintf(buf, size, "%s(%s)",
					data->funcs[j].desc.name, name);
			if (ret < 0)
				return -ENOSPC;

			found = 1;
			buf += ret;
			size -= ret;
			break;
		}

		if (found)
			break;
	}

	if (!found) {
		gpio = pin_to_gpio(pinctrl, pin);
		if (gpio < 0) {
			/*
			 * WARNING: non-gpio pin with unknown function.
			 *
			 * This should not have happened, the function group
			 * tables are incomplete. Please fix ASAP.
			 */
			ret = scnprintf(buf, size, "default");
		} else {
			/* assume gpio */
			val = airoha_gpio_get(pinctrl, gpio);
			switch (airoha_gpio_get_direction(pinctrl, gpio)) {
			case GPIOF_INPUT:
				type = "input";
				break;
			case GPIOF_OUTPUT:
				type = "output";
				break;
			default:
				type = "unknown";
				break;
			};
			ret = scnprintf(buf, size, "gpio%d, %s(%d)",
					gpio, type, val);
		}

		if (ret < 0)
			return -ENOSPC;

		buf += ret;
		size -= ret;
	}

	for (int i = 0; i < ARRAY_SIZE(airoha_pinconf_params); i++) {
		param = airoha_pinconf_params[i].param;
		config = pinconf_to_config_packed(param, 0);
		ret = airoha_pinconf_get(pinctrl, pin, &config);
		if (ret < 0)
			continue;

		name = airoha_pinconf_params[i].property;
		switch (param) {
		case PIN_CONFIG_BIAS_DISABLE:
		case PIN_CONFIG_BIAS_PULL_UP:
		case PIN_CONFIG_BIAS_PULL_DOWN:
			ret = scnprintf(buf, size, ", %s", name);
			break;

		case PIN_CONFIG_DRIVE_STRENGTH:
		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
			val = pinconf_to_config_argument(config);
			ret = scnprintf(buf, size, ", %s(%d)", name, val);
			break;

		default:
			break;
		}

		if (ret < 0)
			return -ENOSPC;

		buf += ret;
		size -= ret;
	}

	return 0;
}

const struct pinctrl_ops airoha_pinctrl_ops = {
	.get_pins_count		= airoha_get_pins_count,
	.get_pin_name		= airoha_get_pin_name,
	.get_groups_count	= airoha_get_groups_count,
	.get_group_name		= airoha_get_group_name,
	.get_functions_count	= airoha_get_funcs_count,
	.get_function_name	= airoha_get_func_name,
	.pinmux_set		= airoha_pinmux_set,
	.pinmux_group_set	= airoha_pinmux_group_set,

	.pinconf_num_params	= ARRAY_SIZE(airoha_pinconf_params),
	.pinconf_params		= airoha_pinconf_params,
	.pinconf_set		= airoha_pinconf_set_handler,
	.pinconf_group_set	= airoha_pinconf_group_set_handler,

	.set_state		= pinctrl_generic_set_state,
	.get_pin_muxing		= airoha_get_pin_muxing,
};

int airoha_pinctrl_probe(struct udevice *dev)
{
	struct airoha_pinctrl *pinctrl = dev_get_priv(dev);

	pinctrl->dev = dev;
	pinctrl->data = (struct airoha_pinctrl_match_data *)dev_get_driver_data(dev);

	pinctrl->regmap = syscon_node_to_regmap(dev_ofnode(dev->parent));
	if (IS_ERR(pinctrl->regmap))
		return PTR_ERR(pinctrl->regmap);

	pinctrl->chip_scu = airoha_get_chip_scu_regmap();
	if (IS_ERR(pinctrl->chip_scu))
		return PTR_ERR(pinctrl->chip_scu);

	pinctrl->gpiochip.data   = gpio_data_regs;
	pinctrl->gpiochip.dir    = gpio_dir_regs;
	pinctrl->gpiochip.out    = gpio_out_regs;
	pinctrl->gpiochip.status = irq_status_regs;
	pinctrl->gpiochip.level  = irq_level_regs;
	pinctrl->gpiochip.edge   = irq_edge_regs;

	return 0;
}

int airoha_pinctrl_bind(struct udevice *dev)
{
	if (airoha_pinctrl_gpio_register(dev))
		debug("Warning: can't bind gpio driver with device node\n");

	/*
	 * Make sure that the pinctrl driver gets probed after binding,
	 * otherwise GPIO interface driver will not be probed as well.
	 * GPIOs of non-probed driver can't be used.
	 */
	dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND);

	return 0;
}