drivers/pinctrl/mediatek/pinctrl-mtk-common.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2018 MediaTek Inc.
  * Author: Ryder Lee <ryder.lee@mediatek.com>
  */

 #include <dm.h>
 #include <dm/device-internal.h>
 #include <dm/lists.h>
 #include <dm/pinctrl.h>
 #include <asm/io.h>
 #include <asm-generic/gpio.h>
 #include <linux/bitops.h>

 #include "pinctrl-mtk-common.h"

 #if CONFIG_IS_ENABLED(PINCONF)
 /**
  * struct mtk_drive_desc - the structure that holds the information
  *			    of the driving current
  * @min:	the minimum current of this group
  * @max:	the maximum current of this group
  * @step:	the step current of this group
  * @scal:	the weight factor
  *
  * formula: output = ((input) / step - 1) * scal
  */
 struct mtk_drive_desc {
 	u8 min;
 	u8 max;
 	u8 step;
 	u8 scal;
 };

 /* The groups of drive strength */
 static const struct mtk_drive_desc mtk_drive[] = {
 	[DRV_GRP0] = { 4, 16, 4, 1 },
 	[DRV_GRP1] = { 4, 16, 4, 2 },
 	[DRV_GRP2] = { 2, 8, 2, 1 },
 	[DRV_GRP3] = { 2, 8, 2, 2 },
 	[DRV_GRP4] = { 2, 16, 2, 1 },
 };
 #endif

 static const char *mtk_pinctrl_dummy_name = "_dummy";

 static void mtk_w32(struct udevice *dev, u8 i, u32 reg, u32 val)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	__raw_writel(val, priv->base[i] + reg);
 }

 static u32 mtk_r32(struct udevice *dev, u8 i, u32 reg)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	return __raw_readl(priv->base[i] + reg);
 }

 static inline int get_count_order(unsigned int count)
 {
 	int order;

 	order = fls(count) - 1;
 	if (count & (count - 1))
 		order++;
 	return order;
 }

 void mtk_rmw(struct udevice *dev, u32 reg, u32 mask, u32 set)
 {
 	return mtk_i_rmw(dev, 0, reg, mask, set);
 }

 void mtk_i_rmw(struct udevice *dev, u8 i, u32 reg, u32 mask, u32 set)
 {
 	u32 val;

 	val = mtk_r32(dev, i, reg);
 	val &= ~mask;
 	val |= set;
 	mtk_w32(dev, i, reg, val);
 }

 static int mtk_hw_pin_field_lookup(struct udevice *dev, int pin,
 				   const struct mtk_pin_reg_calc *rc,
 				   struct mtk_pin_field *pfd)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	const struct mtk_pin_field_calc *c, *e;
 	u32 bits;
 	u32 base_calc = priv->soc->base_calc;

 	c = rc->range;
 	e = c + rc->nranges;

 	while (c < e) {
 		if (pin >= c->s_pin && pin <= c->e_pin)
 			break;
 		c++;
 	}

 	if (c >= e)
 		return -EINVAL;

 	/* Calculated bits as the overall offset the pin is located at,
 	 * if c->fixed is held, that determines the all the pins in the
 	 * range use the same field with the s_pin.
 	 */
 	bits = c->fixed ? c->s_bit : c->s_bit + (pin - c->s_pin) * (c->x_bits);

 	/* Fill pfd from bits. For example 32-bit register applied is assumed
 	 * when c->sz_reg is equal to 32.
 	 */
 	pfd->offset = c->s_addr + c->x_addrs * (bits / c->sz_reg);
 	pfd->bitpos = bits % c->sz_reg;
 	pfd->mask = (1 << c->x_bits) - 1;

 	if (base_calc)
 		pfd->index = c->i_base;
 	else
 		pfd->index = 0;

 	/* pfd->next is used for indicating that bit wrapping-around happens
 	 * which requires the manipulation for bit 0 starting in the next
 	 * register to form the complete field read/write.
 	 */
 	pfd->next = pfd->bitpos + c->x_bits > c->sz_reg ? c->x_addrs : 0;

 	return 0;
 }

 static int mtk_hw_pin_field_get(struct udevice *dev, int pin,
 				int field, struct mtk_pin_field *pfd)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	const struct mtk_pin_reg_calc *rc;

 	if (field < 0 || field >= PINCTRL_PIN_REG_MAX)
 		return -EINVAL;

 	if (priv->soc->reg_cal && priv->soc->reg_cal[field].range)
 		rc = &priv->soc->reg_cal[field];
 	else
 		return -EINVAL;

 	return mtk_hw_pin_field_lookup(dev, pin, rc, pfd);
 }

 static void mtk_hw_bits_part(struct mtk_pin_field *pf, int *h, int *l)
 {
 	*l = 32 - pf->bitpos;
 	*h = get_count_order(pf->mask) - *l;
 }

 static void mtk_hw_write_cross_field(struct udevice *dev,
 				     struct mtk_pin_field *pf, int value)
 {
 	int nbits_l, nbits_h;

 	mtk_hw_bits_part(pf, &nbits_h, &nbits_l);

 	mtk_i_rmw(dev, pf->index, pf->offset, pf->mask << pf->bitpos,
 		(value & pf->mask) << pf->bitpos);

 	mtk_i_rmw(dev, pf->index, pf->offset + pf->next, BIT(nbits_h) - 1,
 		(value & pf->mask) >> nbits_l);
 }

 static void mtk_hw_read_cross_field(struct udevice *dev,
 				    struct mtk_pin_field *pf, int *value)
 {
 	int nbits_l, nbits_h, h, l;

 	mtk_hw_bits_part(pf, &nbits_h, &nbits_l);

 	l  = (mtk_r32(dev, pf->index, pf->offset) >> pf->bitpos) & (BIT(nbits_l) - 1);
 	h  = (mtk_r32(dev, pf->index, pf->offset + pf->next)) & (BIT(nbits_h) - 1);

 	*value = (h << nbits_l) | l;
 }

 static int mtk_hw_set_value(struct udevice *dev, int pin, int field,
 			    int value)
 {
 	struct mtk_pin_field pf;
 	int err;

 	err = mtk_hw_pin_field_get(dev, pin, field, &pf);
 	if (err)
 		return err;

 	if (!pf.next)
 		mtk_i_rmw(dev, pf.index, pf.offset, pf.mask << pf.bitpos,
 			(value & pf.mask) << pf.bitpos);
 	else
 		mtk_hw_write_cross_field(dev, &pf, value);

 	return 0;
 }

 static int mtk_hw_get_value(struct udevice *dev, int pin, int field,
 			    int *value)
 {
 	struct mtk_pin_field pf;
 	int err;

 	err = mtk_hw_pin_field_get(dev, pin, field, &pf);
 	if (err)
 		return err;

 	if (!pf.next)
 		*value = (mtk_r32(dev, pf.index, pf.offset) >> pf.bitpos) & pf.mask;
 	else
 		mtk_hw_read_cross_field(dev, &pf, value);

 	return 0;
 }

 #if CONFIG_IS_ENABLED(PINCONF)
 static int mtk_get_pin_io_type(struct udevice *dev, int pin,
 			       struct mtk_io_type_desc *io_type)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	u8 io_n = priv->soc->pins[pin].io_n;

 	if (io_n >= priv->soc->ntype)
 		return -EINVAL;

 	io_type->name = priv->soc->io_type[io_n].name;
 	io_type->bias_set = priv->soc->io_type[io_n].bias_set;
 	io_type->drive_set = priv->soc->io_type[io_n].drive_set;
 	io_type->input_enable = priv->soc->io_type[io_n].input_enable;

 	return 0;
 }
 #endif

 static int mtk_get_groups_count(struct udevice *dev)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	return priv->soc->ngrps;
 }

 static const char *mtk_get_pin_name(struct udevice *dev,
 				    unsigned int selector)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	if (!priv->soc->pins[selector].name)
 		return mtk_pinctrl_dummy_name;

 	return priv->soc->pins[selector].name;
 }

 static int mtk_get_pins_count(struct udevice *dev)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	return priv->soc->npins;
 }

 static int mtk_get_pin_muxing(struct udevice *dev, unsigned int selector,
 			      char *buf, int size)
 {
 	int val, err;
 	err = mtk_hw_get_value(dev, selector, PINCTRL_PIN_REG_MODE, &val);
 	if (err)
 		return err;

 	snprintf(buf, size, "Aux Func.%d", val);
 	return 0;
 }

 static const char *mtk_get_group_name(struct udevice *dev,
 				      unsigned int selector)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	if (!priv->soc->grps[selector].name)
 		return mtk_pinctrl_dummy_name;

 	return priv->soc->grps[selector].name;
 }

 static int mtk_get_functions_count(struct udevice *dev)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	return priv->soc->nfuncs;
 }

 static const char *mtk_get_function_name(struct udevice *dev,
 					 unsigned int selector)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

 	if (!priv->soc->funcs[selector].name)
 		return mtk_pinctrl_dummy_name;

 	return priv->soc->funcs[selector].name;
 }

 static int mtk_pinmux_set(struct udevice *dev, unsigned int pin_selector,
 			  unsigned int func_selector)
 {
 	int err;

 	err = mtk_hw_set_value(dev, pin_selector, PINCTRL_PIN_REG_MODE,
 			       func_selector);
 	if (err)
 		return err;

 	return 0;
 }

 static int mtk_pinmux_group_set(struct udevice *dev,
 				unsigned int group_selector,
 				unsigned int func_selector)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	const struct mtk_group_desc *grp =
 			&priv->soc->grps[group_selector];
 	int i;

 	for (i = 0; i < grp->num_pins; i++) {
 		const int *pin_modes = grp->data;

 		mtk_hw_set_value(dev, grp->pins[i], PINCTRL_PIN_REG_MODE,
 				 pin_modes[i]);
 	}

 	return 0;
 }

 #if CONFIG_IS_ENABLED(PINCONF)
 static const struct pinconf_param mtk_conf_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 },
 	{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
 	{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
 	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
 	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
 	{ "output-enable", PIN_CONFIG_OUTPUT_ENABLE, 1 },
 	{ "output-high", PIN_CONFIG_OUTPUT, 1, },
 	{ "output-low", PIN_CONFIG_OUTPUT, 0, },
 	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
 };

 int mtk_pinconf_bias_set_v0(struct udevice *dev, u32 pin, bool disable,
 			    bool pullup, u32 val)
 {
 	return mtk_pinconf_bias_set_pu_pd(dev, pin, disable, pullup, val);
 }

 int mtk_pinconf_bias_set_v1(struct udevice *dev, u32 pin, bool disable,
 			    bool pullup, u32 val)
 {
 	int err;

 	/* set pupd_r1_r0 if pullen_pullsel succeeded */
 	err = mtk_pinconf_bias_set_pullen_pullsel(dev, pin, disable, pullup,
 						  val);
 	if (!err)
 		return mtk_pinconf_bias_set_pupd_r1_r0(dev, pin, disable,
 						       pullup, val);

 	return err;
 }

 int mtk_pinconf_bias_set_pu_pd(struct udevice *dev, u32 pin, bool disable,
 			       bool pullup, u32 val)
 {
 	int err;

 	if (disable) {
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PU, 0);
 		if (err)
 			return err;
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PD, 0);
 		if (err)
 			return err;
 	} else {
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PU, pullup);
 		if (err)
 			return err;
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PD, !pullup);
 		if (err)
 			return err;
 	}

 	return 0;
 }

 int mtk_pinconf_bias_set_pullen_pullsel(struct udevice *dev, u32 pin,
 					bool disable, bool pullup, u32 val)
 {
 	int err;

 	if (disable) {
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLEN, 0);
 		if (err)
 			return err;
 	} else {
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLEN, 1);
 		if (err)
 			return err;
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLSEL,
 				       pullup);
 		if (err)
 			return err;
 	}

 	return 0;
 }

 int mtk_pinconf_bias_set_pupd_r1_r0(struct udevice *dev, u32 pin, bool disable,
 				    bool pullup, u32 val)
 {
 	int err, r0, r1;

 	r0 = !!(val & 1);
 	r1 = !!(val & 2);

 	if (disable) {
 		pullup = 0;
 		r0 = 0;
 		r1 = 0;
 	}

 	/* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
 	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PUPD, !pullup);
 	if (err)
 		return err;

 	/* Also set PUPD/R0/R1 if the pin has them */
 	mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_R0, r0);
 	mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_R1, r1);

 	return 0;
 }

 int mtk_pinconf_bias_set(struct udevice *dev, u32 pin, u32 arg, u32 val)
 {
 	int err;
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	struct mtk_io_type_desc io_type;
 	int rev = priv->soc->rev;
 	bool disable, pullup;

 	disable = (arg == PIN_CONFIG_BIAS_DISABLE);
 	pullup = (arg == PIN_CONFIG_BIAS_PULL_UP);

 	if (!mtk_get_pin_io_type(dev, pin, &io_type)) {
 		if (io_type.bias_set)
 			err = io_type.bias_set(dev, pin, disable, pullup,
 					       val);
 		else
 			err = -EINVAL;

 	} else if (rev == MTK_PINCTRL_V0) {
 		err = mtk_pinconf_bias_set_v0(dev, pin, disable, pullup, val);
 	} else {
 		err = mtk_pinconf_bias_set_v1(dev, pin, disable, pullup, val);
 	}

 	return err;
 }

 int mtk_pinconf_input_enable_v1(struct udevice *dev, u32 pin, u32 arg)
 {
 	int err;

 	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_IES, 1);
 	if (err)
 		return err;
 	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 0);
 	if (err)
 		return err;

 	return 0;
 }

 int mtk_pinconf_input_enable(struct udevice *dev, u32 pin, u32 arg)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	struct mtk_io_type_desc io_type;

 	int rev = priv->soc->rev;

 	if (!mtk_get_pin_io_type(dev, pin, &io_type))
 		if (io_type.input_enable)
 			return io_type.input_enable(dev, pin, arg);
 	if (rev == MTK_PINCTRL_V1)
 		return mtk_pinconf_input_enable_v1(dev, pin, arg);

 	return 0;
 }

 int mtk_pinconf_drive_set_v0(struct udevice *dev, u32 pin, u32 arg)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	const struct mtk_pin_desc *desc = &priv->soc->pins[pin];
 	const struct mtk_drive_desc *tb;
 	int err = -ENOTSUPP;

 	tb = &mtk_drive[desc->drv_n];
 	/* 4mA when (e8, e4) = (0, 0)
 	 * 8mA when (e8, e4) = (0, 1)
 	 * 12mA when (e8, e4) = (1, 0)
 	 * 16mA when (e8, e4) = (1, 1)
 	 */
 	if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) {
 		arg = (arg / tb->step - 1) * tb->scal;
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_E4,
 				       arg & 0x1);
 		if (err)
 			return err;
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_E8,
 				       (arg & 0x2) >> 1);
 		if (err)
 			return err;
 	}

 	return err;
 }

 int mtk_pinconf_drive_set_v1(struct udevice *dev, u32 pin, u32 arg)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	const struct mtk_pin_desc *desc = &priv->soc->pins[pin];
 	const struct mtk_drive_desc *tb;
 	int err = -ENOTSUPP;

 	tb = &mtk_drive[desc->drv_n];
 	if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) {
 		arg = (arg / tb->step - 1) * tb->scal;
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DRV, arg);
 		if (err)
 			return err;
 	}

 	return err;
 }

 int mtk_pinconf_drive_set(struct udevice *dev, u32 pin, u32 arg)
 {
 	int err;
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	struct mtk_io_type_desc io_type;
 	int rev = priv->soc->rev;

 	if (!mtk_get_pin_io_type(dev, pin, &io_type)) {
 		if (io_type.drive_set)
 			err = io_type.drive_set(dev, pin, arg);
 		else
 			err = -EINVAL;
 	} else if (rev == MTK_PINCTRL_V0) {
 		err = mtk_pinconf_drive_set_v0(dev, pin, arg);
 	} else {
 		err = mtk_pinconf_drive_set_v1(dev, pin, arg);
 	}

 	return err;
 }

 static int mtk_pinconf_set(struct udevice *dev, unsigned int pin,
 			   unsigned int param, unsigned int arg)
 {
 	int err = 0;

 	switch (param) {
 	case PIN_CONFIG_BIAS_DISABLE:
 	case PIN_CONFIG_BIAS_PULL_UP:
 	case PIN_CONFIG_BIAS_PULL_DOWN:
 		err = mtk_pinconf_bias_set(dev, pin, param, arg);
 		if (err)
 			goto err;
 		break;
 	case PIN_CONFIG_OUTPUT_ENABLE:
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_SMT, 0);
 		if (err)
 			goto err;
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 1);
 		if (err)
 			goto err;
 		break;
 	case PIN_CONFIG_INPUT_ENABLE:
 		err = mtk_pinconf_input_enable(dev, pin, param);
 		if (err)
 			goto err;
 		break;
 	case PIN_CONFIG_OUTPUT:
 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 1);
 		if (err)
 			goto err;

 		err = mtk_hw_set_value(dev, pin, 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(dev, pin, PINCTRL_PIN_REG_DIR,
 				       arg & 1);
 		if (err)
 			goto err;

 		err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_SMT,
 				       !!(arg & 2));
 		if (err)
 			goto err;
 		break;
 	case PIN_CONFIG_DRIVE_STRENGTH:
 		err = mtk_pinconf_drive_set(dev, pin, arg);
 		if (err)
 			goto err;
 		break;

 	default:
 		err = -ENOTSUPP;
 	}

 err:

 	return err;
 }

 static int mtk_pinconf_group_set(struct udevice *dev,
 				 unsigned int group_selector,
 				 unsigned int param, unsigned int arg)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	const struct mtk_group_desc *grp =
 			&priv->soc->grps[group_selector];
 	int i, ret;

 	for (i = 0; i < grp->num_pins; i++) {
 		ret = mtk_pinconf_set(dev, grp->pins[i], param, arg);
 		if (ret)
 			return ret;
 	}

 	return 0;
 }
 #endif

 const struct pinctrl_ops mtk_pinctrl_ops = {
 	.get_pins_count = mtk_get_pins_count,
 	.get_pin_name = mtk_get_pin_name,
 	.get_pin_muxing = mtk_get_pin_muxing,
 	.get_groups_count = mtk_get_groups_count,
 	.get_group_name = mtk_get_group_name,
 	.get_functions_count = mtk_get_functions_count,
 	.get_function_name = mtk_get_function_name,
 	.pinmux_set = mtk_pinmux_set,
 	.pinmux_group_set = mtk_pinmux_group_set,
 #if CONFIG_IS_ENABLED(PINCONF)
 	.pinconf_num_params = ARRAY_SIZE(mtk_conf_params),
 	.pinconf_params = mtk_conf_params,
 	.pinconf_set = mtk_pinconf_set,
 	.pinconf_group_set = mtk_pinconf_group_set,
 #endif
 	.set_state = pinctrl_generic_set_state,
 };

 #if CONFIG_IS_ENABLED(DM_GPIO) || \
     (defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_GPIO))
 static int mtk_gpio_get(struct udevice *dev, unsigned int off)
 {
 	int val, err;

 	err = mtk_hw_get_value(dev->parent, off, PINCTRL_PIN_REG_DI, &val);
 	if (err)
 		return err;

 	return !!val;
 }

 static int mtk_gpio_set(struct udevice *dev, unsigned int off, int val)
 {
 	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DO, !!val);
 }

 static int mtk_gpio_get_direction(struct udevice *dev, unsigned int off)
 {
 	int val, err;

 	err = mtk_hw_get_value(dev->parent, off, PINCTRL_PIN_REG_DIR, &val);
 	if (err)
 		return err;

 	return val ? GPIOF_OUTPUT : GPIOF_INPUT;
 }

 static int mtk_gpio_direction_input(struct udevice *dev, unsigned int off)
 {
 	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DIR, 0);
 }

 static int mtk_gpio_direction_output(struct udevice *dev,
 				     unsigned int off, int val)
 {
 	mtk_gpio_set(dev, off, val);

 	/* And set the requested value */
 	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DIR, 1);
 }

 static int mtk_gpio_request(struct udevice *dev, unsigned int off,
 			    const char *label)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev->parent);

 	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_MODE,
 				priv->soc->gpio_mode);
 }

 static int mtk_gpio_probe(struct udevice *dev)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev->parent);
 	struct gpio_dev_priv *uc_priv;

 	uc_priv = dev_get_uclass_priv(dev);
 	uc_priv->bank_name = priv->soc->name;
 	uc_priv->gpio_count = priv->soc->npins;

 	return 0;
 }

 static const struct dm_gpio_ops mtk_gpio_ops = {
 	.request = mtk_gpio_request,
 	.set_value = mtk_gpio_set,
 	.get_value = mtk_gpio_get,
 	.get_function = mtk_gpio_get_direction,
 	.direction_input = mtk_gpio_direction_input,
 	.direction_output = mtk_gpio_direction_output,
 };

 static struct driver mtk_gpio_driver = {
 	.name = "mediatek_gpio",
 	.id	= UCLASS_GPIO,
 	.probe = mtk_gpio_probe,
 	.ops = &mtk_gpio_ops,
 };

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

 	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")) {
 		node = dev_ofnode(parent);
 		goto bind;
 	}

 	ret = -ENOENT;
 	dev_for_each_subnode(node, parent)
 		if (ofnode_read_bool(node, "gpio-controller")) {
 			ret = 0;
 			break;
 		}

 	if (ret)
 		return ret;

 bind:
 	ret = device_bind_with_driver_data(parent, &mtk_gpio_driver,
 					   "mediatek_gpio", 0, node,
 					   &dev);
 	if (ret)
 		return ret;

 	return 0;
 }
 #endif

 int mtk_pinctrl_common_bind(struct udevice *dev)
 {
 #if CONFIG_IS_ENABLED(DM_GPIO) || \
     (defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_GPIO))
 	return mtk_gpiochip_register(dev);
 #else
 	return 0;
 #endif
 }

 int mtk_pinctrl_common_probe(struct udevice *dev,
 			     const struct mtk_pinctrl_soc *soc)
 {
 	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
 	u32 i = 0;
 	fdt_addr_t addr;
 	u32 base_calc = soc->base_calc;
 	u32 nbase_names = soc->nbase_names;

 	priv->soc = soc;

 	if (!base_calc)
 		nbase_names = 1;

 	for (i = 0; i < nbase_names; i++) {
 		addr = devfdt_get_addr_index(dev, i);
 		if (addr == FDT_ADDR_T_NONE)
 			return -EINVAL;
 		priv->base[i] = (void __iomem *)addr;
 	}

 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright (C) 2018 MediaTek Inc.
	* Author: Ryder Lee <ryder.lee@mediatek.com>
	*/

	#include <dm.h>
	#include <dm/device-internal.h>
	#include <dm/lists.h>
	#include <dm/pinctrl.h>
	#include <asm/io.h>
	#include <asm-generic/gpio.h>
	#include <linux/bitops.h>

	#include "pinctrl-mtk-common.h"

	#if CONFIG_IS_ENABLED(PINCONF)
	/**
	* struct mtk_drive_desc - the structure that holds the information
	* of the driving current
	* @min: the minimum current of this group
	* @max: the maximum current of this group
	* @step: the step current of this group
	* @scal: the weight factor
	*
	* formula: output = ((input) / step - 1) * scal
	*/
	struct mtk_drive_desc {
	u8 min;
	u8 max;
	u8 step;
	u8 scal;
	};

	/* The groups of drive strength */
	static const struct mtk_drive_desc mtk_drive[] = {
	[DRV_GRP0] = { 4, 16, 4, 1 },
	[DRV_GRP1] = { 4, 16, 4, 2 },
	[DRV_GRP2] = { 2, 8, 2, 1 },
	[DRV_GRP3] = { 2, 8, 2, 2 },
	[DRV_GRP4] = { 2, 16, 2, 1 },
	};
	#endif

	static const char *mtk_pinctrl_dummy_name = "_dummy";

	static void mtk_w32(struct udevice *dev, u8 i, u32 reg, u32 val)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	__raw_writel(val, priv->base[i] + reg);
	}

	static u32 mtk_r32(struct udevice *dev, u8 i, u32 reg)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	return __raw_readl(priv->base[i] + reg);
	}

	static inline int get_count_order(unsigned int count)
	{
	int order;

	order = fls(count) - 1;
	if (count & (count - 1))
	order++;
	return order;
	}

	void mtk_rmw(struct udevice *dev, u32 reg, u32 mask, u32 set)
	{
	return mtk_i_rmw(dev, 0, reg, mask, set);
	}

	void mtk_i_rmw(struct udevice *dev, u8 i, u32 reg, u32 mask, u32 set)
	{
	u32 val;

	val = mtk_r32(dev, i, reg);
	val &= ~mask;
	val \|= set;
	mtk_w32(dev, i, reg, val);
	}

	static int mtk_hw_pin_field_lookup(struct udevice *dev, int pin,
	const struct mtk_pin_reg_calc *rc,
	struct mtk_pin_field *pfd)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	const struct mtk_pin_field_calc c, e;
	u32 bits;
	u32 base_calc = priv->soc->base_calc;

	c = rc->range;
	e = c + rc->nranges;

	while (c < e) {
	if (pin >= c->s_pin && pin <= c->e_pin)
	break;
	c++;
	}

	if (c >= e)
	return -EINVAL;

	/* Calculated bits as the overall offset the pin is located at,
	* if c->fixed is held, that determines the all the pins in the
	* range use the same field with the s_pin.
	*/
	bits = c->fixed ? c->s_bit : c->s_bit + (pin - c->s_pin) * (c->x_bits);

	/* Fill pfd from bits. For example 32-bit register applied is assumed
	* when c->sz_reg is equal to 32.
	*/
	pfd->offset = c->s_addr + c->x_addrs * (bits / c->sz_reg);
	pfd->bitpos = bits % c->sz_reg;
	pfd->mask = (1 << c->x_bits) - 1;

	if (base_calc)
	pfd->index = c->i_base;
	else
	pfd->index = 0;

	/* pfd->next is used for indicating that bit wrapping-around happens
	* which requires the manipulation for bit 0 starting in the next
	* register to form the complete field read/write.
	*/
	pfd->next = pfd->bitpos + c->x_bits > c->sz_reg ? c->x_addrs : 0;

	return 0;
	}

	static int mtk_hw_pin_field_get(struct udevice *dev, int pin,
	int field, struct mtk_pin_field *pfd)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	const struct mtk_pin_reg_calc *rc;

	if (field < 0 \|\| field >= PINCTRL_PIN_REG_MAX)
	return -EINVAL;

	if (priv->soc->reg_cal && priv->soc->reg_cal[field].range)
	rc = &priv->soc->reg_cal[field];
	else
	return -EINVAL;

	return mtk_hw_pin_field_lookup(dev, pin, rc, pfd);
	}

	static void mtk_hw_bits_part(struct mtk_pin_field pf, int h, int *l)
	{
	*l = 32 - pf->bitpos;
	h = get_count_order(pf->mask) - l;
	}

	static void mtk_hw_write_cross_field(struct udevice *dev,
	struct mtk_pin_field *pf, int value)
	{
	int nbits_l, nbits_h;

	mtk_hw_bits_part(pf, &nbits_h, &nbits_l);

	mtk_i_rmw(dev, pf->index, pf->offset, pf->mask << pf->bitpos,
	(value & pf->mask) << pf->bitpos);

	mtk_i_rmw(dev, pf->index, pf->offset + pf->next, BIT(nbits_h) - 1,
	(value & pf->mask) >> nbits_l);
	}

	static void mtk_hw_read_cross_field(struct udevice *dev,
	struct mtk_pin_field pf, int value)
	{
	int nbits_l, nbits_h, h, l;

	mtk_hw_bits_part(pf, &nbits_h, &nbits_l);

	l = (mtk_r32(dev, pf->index, pf->offset) >> pf->bitpos) & (BIT(nbits_l) - 1);
	h = (mtk_r32(dev, pf->index, pf->offset + pf->next)) & (BIT(nbits_h) - 1);

	*value = (h << nbits_l) \| l;
	}

	static int mtk_hw_set_value(struct udevice *dev, int pin, int field,
	int value)
	{
	struct mtk_pin_field pf;
	int err;

	err = mtk_hw_pin_field_get(dev, pin, field, &pf);
	if (err)
	return err;

	if (!pf.next)
	mtk_i_rmw(dev, pf.index, pf.offset, pf.mask << pf.bitpos,
	(value & pf.mask) << pf.bitpos);
	else
	mtk_hw_write_cross_field(dev, &pf, value);

	return 0;
	}

	static int mtk_hw_get_value(struct udevice *dev, int pin, int field,
	int *value)
	{
	struct mtk_pin_field pf;
	int err;

	err = mtk_hw_pin_field_get(dev, pin, field, &pf);
	if (err)
	return err;

	if (!pf.next)
	*value = (mtk_r32(dev, pf.index, pf.offset) >> pf.bitpos) & pf.mask;
	else
	mtk_hw_read_cross_field(dev, &pf, value);

	return 0;
	}

	#if CONFIG_IS_ENABLED(PINCONF)
	static int mtk_get_pin_io_type(struct udevice *dev, int pin,
	struct mtk_io_type_desc *io_type)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	u8 io_n = priv->soc->pins[pin].io_n;

	if (io_n >= priv->soc->ntype)
	return -EINVAL;

	io_type->name = priv->soc->io_type[io_n].name;
	io_type->bias_set = priv->soc->io_type[io_n].bias_set;
	io_type->drive_set = priv->soc->io_type[io_n].drive_set;
	io_type->input_enable = priv->soc->io_type[io_n].input_enable;

	return 0;
	}
	#endif

	static int mtk_get_groups_count(struct udevice *dev)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	return priv->soc->ngrps;
	}

	static const char mtk_get_pin_name(struct udevice dev,
	unsigned int selector)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	if (!priv->soc->pins[selector].name)
	return mtk_pinctrl_dummy_name;

	return priv->soc->pins[selector].name;
	}

	static int mtk_get_pins_count(struct udevice *dev)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	return priv->soc->npins;
	}

	static int mtk_get_pin_muxing(struct udevice *dev, unsigned int selector,
	char *buf, int size)
	{
	int val, err;
	err = mtk_hw_get_value(dev, selector, PINCTRL_PIN_REG_MODE, &val);
	if (err)
	return err;

	snprintf(buf, size, "Aux Func.%d", val);
	return 0;
	}

	static const char mtk_get_group_name(struct udevice dev,
	unsigned int selector)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	if (!priv->soc->grps[selector].name)
	return mtk_pinctrl_dummy_name;

	return priv->soc->grps[selector].name;
	}

	static int mtk_get_functions_count(struct udevice *dev)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	return priv->soc->nfuncs;
	}

	static const char mtk_get_function_name(struct udevice dev,
	unsigned int selector)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);

	if (!priv->soc->funcs[selector].name)
	return mtk_pinctrl_dummy_name;

	return priv->soc->funcs[selector].name;
	}

	static int mtk_pinmux_set(struct udevice *dev, unsigned int pin_selector,
	unsigned int func_selector)
	{
	int err;

	err = mtk_hw_set_value(dev, pin_selector, PINCTRL_PIN_REG_MODE,
	func_selector);
	if (err)
	return err;

	return 0;
	}

	static int mtk_pinmux_group_set(struct udevice *dev,
	unsigned int group_selector,
	unsigned int func_selector)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	const struct mtk_group_desc *grp =
	&priv->soc->grps[group_selector];
	int i;

	for (i = 0; i < grp->num_pins; i++) {
	const int *pin_modes = grp->data;

	mtk_hw_set_value(dev, grp->pins[i], PINCTRL_PIN_REG_MODE,
	pin_modes[i]);
	}

	return 0;
	}

	#if CONFIG_IS_ENABLED(PINCONF)
	static const struct pinconf_param mtk_conf_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 },
	{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
	{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
	{ "output-enable", PIN_CONFIG_OUTPUT_ENABLE, 1 },
	{ "output-high", PIN_CONFIG_OUTPUT, 1, },
	{ "output-low", PIN_CONFIG_OUTPUT, 0, },
	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
	};

	int mtk_pinconf_bias_set_v0(struct udevice *dev, u32 pin, bool disable,
	bool pullup, u32 val)
	{
	return mtk_pinconf_bias_set_pu_pd(dev, pin, disable, pullup, val);
	}

	int mtk_pinconf_bias_set_v1(struct udevice *dev, u32 pin, bool disable,
	bool pullup, u32 val)
	{
	int err;

	/* set pupd_r1_r0 if pullen_pullsel succeeded */
	err = mtk_pinconf_bias_set_pullen_pullsel(dev, pin, disable, pullup,
	val);
	if (!err)
	return mtk_pinconf_bias_set_pupd_r1_r0(dev, pin, disable,
	pullup, val);

	return err;
	}

	int mtk_pinconf_bias_set_pu_pd(struct udevice *dev, u32 pin, bool disable,
	bool pullup, u32 val)
	{
	int err;

	if (disable) {
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PU, 0);
	if (err)
	return err;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PD, 0);
	if (err)
	return err;
	} else {
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PU, pullup);
	if (err)
	return err;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PD, !pullup);
	if (err)
	return err;
	}

	return 0;
	}

	int mtk_pinconf_bias_set_pullen_pullsel(struct udevice *dev, u32 pin,
	bool disable, bool pullup, u32 val)
	{
	int err;

	if (disable) {
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLEN, 0);
	if (err)
	return err;
	} else {
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLEN, 1);
	if (err)
	return err;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLSEL,
	pullup);
	if (err)
	return err;
	}

	return 0;
	}

	int mtk_pinconf_bias_set_pupd_r1_r0(struct udevice *dev, u32 pin, bool disable,
	bool pullup, u32 val)
	{
	int err, r0, r1;

	r0 = !!(val & 1);
	r1 = !!(val & 2);

	if (disable) {
	pullup = 0;
	r0 = 0;
	r1 = 0;
	}

	/* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PUPD, !pullup);
	if (err)
	return err;

	/* Also set PUPD/R0/R1 if the pin has them */
	mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_R0, r0);
	mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_R1, r1);

	return 0;
	}

	int mtk_pinconf_bias_set(struct udevice *dev, u32 pin, u32 arg, u32 val)
	{
	int err;
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	struct mtk_io_type_desc io_type;
	int rev = priv->soc->rev;
	bool disable, pullup;

	disable = (arg == PIN_CONFIG_BIAS_DISABLE);
	pullup = (arg == PIN_CONFIG_BIAS_PULL_UP);

	if (!mtk_get_pin_io_type(dev, pin, &io_type)) {
	if (io_type.bias_set)
	err = io_type.bias_set(dev, pin, disable, pullup,
	val);
	else
	err = -EINVAL;

	} else if (rev == MTK_PINCTRL_V0) {
	err = mtk_pinconf_bias_set_v0(dev, pin, disable, pullup, val);
	} else {
	err = mtk_pinconf_bias_set_v1(dev, pin, disable, pullup, val);
	}

	return err;
	}

	int mtk_pinconf_input_enable_v1(struct udevice *dev, u32 pin, u32 arg)
	{
	int err;

	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_IES, 1);
	if (err)
	return err;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 0);
	if (err)
	return err;

	return 0;
	}

	int mtk_pinconf_input_enable(struct udevice *dev, u32 pin, u32 arg)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	struct mtk_io_type_desc io_type;

	int rev = priv->soc->rev;

	if (!mtk_get_pin_io_type(dev, pin, &io_type))
	if (io_type.input_enable)
	return io_type.input_enable(dev, pin, arg);
	if (rev == MTK_PINCTRL_V1)
	return mtk_pinconf_input_enable_v1(dev, pin, arg);

	return 0;
	}

	int mtk_pinconf_drive_set_v0(struct udevice *dev, u32 pin, u32 arg)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	const struct mtk_pin_desc *desc = &priv->soc->pins[pin];
	const struct mtk_drive_desc *tb;
	int err = -ENOTSUPP;

	tb = &mtk_drive[desc->drv_n];
	/* 4mA when (e8, e4) = (0, 0)
	* 8mA when (e8, e4) = (0, 1)
	* 12mA when (e8, e4) = (1, 0)
	* 16mA when (e8, e4) = (1, 1)
	*/
	if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) {
	arg = (arg / tb->step - 1) * tb->scal;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_E4,
	arg & 0x1);
	if (err)
	return err;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_E8,
	(arg & 0x2) >> 1);
	if (err)
	return err;
	}

	return err;
	}

	int mtk_pinconf_drive_set_v1(struct udevice *dev, u32 pin, u32 arg)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	const struct mtk_pin_desc *desc = &priv->soc->pins[pin];
	const struct mtk_drive_desc *tb;
	int err = -ENOTSUPP;

	tb = &mtk_drive[desc->drv_n];
	if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) {
	arg = (arg / tb->step - 1) * tb->scal;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DRV, arg);
	if (err)
	return err;
	}

	return err;
	}

	int mtk_pinconf_drive_set(struct udevice *dev, u32 pin, u32 arg)
	{
	int err;
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	struct mtk_io_type_desc io_type;
	int rev = priv->soc->rev;

	if (!mtk_get_pin_io_type(dev, pin, &io_type)) {
	if (io_type.drive_set)
	err = io_type.drive_set(dev, pin, arg);
	else
	err = -EINVAL;
	} else if (rev == MTK_PINCTRL_V0) {
	err = mtk_pinconf_drive_set_v0(dev, pin, arg);
	} else {
	err = mtk_pinconf_drive_set_v1(dev, pin, arg);
	}

	return err;
	}

	static int mtk_pinconf_set(struct udevice *dev, unsigned int pin,
	unsigned int param, unsigned int arg)
	{
	int err = 0;

	switch (param) {
	case PIN_CONFIG_BIAS_DISABLE:
	case PIN_CONFIG_BIAS_PULL_UP:
	case PIN_CONFIG_BIAS_PULL_DOWN:
	err = mtk_pinconf_bias_set(dev, pin, param, arg);
	if (err)
	goto err;
	break;
	case PIN_CONFIG_OUTPUT_ENABLE:
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_SMT, 0);
	if (err)
	goto err;
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 1);
	if (err)
	goto err;
	break;
	case PIN_CONFIG_INPUT_ENABLE:
	err = mtk_pinconf_input_enable(dev, pin, param);
	if (err)
	goto err;
	break;
	case PIN_CONFIG_OUTPUT:
	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 1);
	if (err)
	goto err;

	err = mtk_hw_set_value(dev, pin, 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(dev, pin, PINCTRL_PIN_REG_DIR,
	arg & 1);
	if (err)
	goto err;

	err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_SMT,
	!!(arg & 2));
	if (err)
	goto err;
	break;
	case PIN_CONFIG_DRIVE_STRENGTH:
	err = mtk_pinconf_drive_set(dev, pin, arg);
	if (err)
	goto err;
	break;

	default:
	err = -ENOTSUPP;
	}

	err:

	return err;
	}

	static int mtk_pinconf_group_set(struct udevice *dev,
	unsigned int group_selector,
	unsigned int param, unsigned int arg)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	const struct mtk_group_desc *grp =
	&priv->soc->grps[group_selector];
	int i, ret;

	for (i = 0; i < grp->num_pins; i++) {
	ret = mtk_pinconf_set(dev, grp->pins[i], param, arg);
	if (ret)
	return ret;
	}

	return 0;
	}
	#endif

	const struct pinctrl_ops mtk_pinctrl_ops = {
	.get_pins_count = mtk_get_pins_count,
	.get_pin_name = mtk_get_pin_name,
	.get_pin_muxing = mtk_get_pin_muxing,
	.get_groups_count = mtk_get_groups_count,
	.get_group_name = mtk_get_group_name,
	.get_functions_count = mtk_get_functions_count,
	.get_function_name = mtk_get_function_name,
	.pinmux_set = mtk_pinmux_set,
	.pinmux_group_set = mtk_pinmux_group_set,
	#if CONFIG_IS_ENABLED(PINCONF)
	.pinconf_num_params = ARRAY_SIZE(mtk_conf_params),
	.pinconf_params = mtk_conf_params,
	.pinconf_set = mtk_pinconf_set,
	.pinconf_group_set = mtk_pinconf_group_set,
	#endif
	.set_state = pinctrl_generic_set_state,
	};

	#if CONFIG_IS_ENABLED(DM_GPIO) \|\| \
	(defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_GPIO))
	static int mtk_gpio_get(struct udevice *dev, unsigned int off)
	{
	int val, err;

	err = mtk_hw_get_value(dev->parent, off, PINCTRL_PIN_REG_DI, &val);
	if (err)
	return err;

	return !!val;
	}

	static int mtk_gpio_set(struct udevice *dev, unsigned int off, int val)
	{
	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DO, !!val);
	}

	static int mtk_gpio_get_direction(struct udevice *dev, unsigned int off)
	{
	int val, err;

	err = mtk_hw_get_value(dev->parent, off, PINCTRL_PIN_REG_DIR, &val);
	if (err)
	return err;

	return val ? GPIOF_OUTPUT : GPIOF_INPUT;
	}

	static int mtk_gpio_direction_input(struct udevice *dev, unsigned int off)
	{
	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DIR, 0);
	}

	static int mtk_gpio_direction_output(struct udevice *dev,
	unsigned int off, int val)
	{
	mtk_gpio_set(dev, off, val);

	/* And set the requested value */
	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DIR, 1);
	}

	static int mtk_gpio_request(struct udevice *dev, unsigned int off,
	const char *label)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev->parent);

	return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_MODE,
	priv->soc->gpio_mode);
	}

	static int mtk_gpio_probe(struct udevice *dev)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev->parent);
	struct gpio_dev_priv *uc_priv;

	uc_priv = dev_get_uclass_priv(dev);
	uc_priv->bank_name = priv->soc->name;
	uc_priv->gpio_count = priv->soc->npins;

	return 0;
	}

	static const struct dm_gpio_ops mtk_gpio_ops = {
	.request = mtk_gpio_request,
	.set_value = mtk_gpio_set,
	.get_value = mtk_gpio_get,
	.get_function = mtk_gpio_get_direction,
	.direction_input = mtk_gpio_direction_input,
	.direction_output = mtk_gpio_direction_output,
	};

	static struct driver mtk_gpio_driver = {
	.name = "mediatek_gpio",
	.id = UCLASS_GPIO,
	.probe = mtk_gpio_probe,
	.ops = &mtk_gpio_ops,
	};

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

	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")) {
	node = dev_ofnode(parent);
	goto bind;
	}

	ret = -ENOENT;
	dev_for_each_subnode(node, parent)
	if (ofnode_read_bool(node, "gpio-controller")) {
	ret = 0;
	break;
	}

	if (ret)
	return ret;

	bind:
	ret = device_bind_with_driver_data(parent, &mtk_gpio_driver,
	"mediatek_gpio", 0, node,
	&dev);
	if (ret)
	return ret;

	return 0;
	}
	#endif

	int mtk_pinctrl_common_bind(struct udevice *dev)
	{
	#if CONFIG_IS_ENABLED(DM_GPIO) \|\| \
	(defined(CONFIG_XPL_BUILD) && defined(CONFIG_SPL_GPIO))
	return mtk_gpiochip_register(dev);
	#else
	return 0;
	#endif
	}

	int mtk_pinctrl_common_probe(struct udevice *dev,
	const struct mtk_pinctrl_soc *soc)
	{
	struct mtk_pinctrl_priv *priv = dev_get_priv(dev);
	u32 i = 0;
	fdt_addr_t addr;
	u32 base_calc = soc->base_calc;
	u32 nbase_names = soc->nbase_names;

	priv->soc = soc;

	if (!base_calc)
	nbase_names = 1;

	for (i = 0; i < nbase_names; i++) {
	addr = devfdt_get_addr_index(dev, i);
	if (addr == FDT_ADDR_T_NONE)
	return -EINVAL;
	priv->base[i] = (void __iomem *)addr;
	}

	return 0;
	}