Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 683 insertions, 0 deletions

diff --git a/drivers/pinctrl/mediatek/pinctrl-moore.c b/drivers/pinctrl/mediatek/pinctrl-moore.c
new file mode 100644
index 000000000..5e00f93ac
--- /dev/null
+++ b/drivers/pinctrl/mediatek/pinctrl-moore.c
@@ -0,0 +1,683 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek Pinctrl Moore Driver, which implement the generic dt-binding
+ * pinctrl-bindings.txt for MediaTek SoC.
+ *
+ * Copyright (C) 2017-2018 MediaTek Inc.
+ * Author: Sean Wang <sean.wang@mediatek.com>
+ *
+ */
+
+#include <linux/gpio/driver.h>
+#include "pinctrl-moore.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 int mtk_pinmux_set_mux(struct pinctrl_dev *pctldev,
+			      unsigned int selector, unsigned int group)
+{
+	struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+	struct function_desc *func;
+	struct group_desc *grp;
+	int i;
+
+	func = pinmux_generic_get_function(pctldev, selector);
+	if (!func)
+		return -EINVAL;
+
+	grp = pinctrl_generic_get_group(pctldev, group);
+	if (!grp)
+		return -EINVAL;
+
+	dev_dbg(pctldev->dev, "enable function %s group %s\n",
+		func->name, grp->name);
+
+	for (i = 0; i < grp->num_pins; i++) {
+		const struct mtk_pin_desc *desc;
+		int *pin_modes = grp->data;
+		int pin = grp->pins[i];
+
+		desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
+
+		mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
+				 pin_modes[i]);
+	}
+
+	return 0;
+}
+
+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,
+			   unsigned long *configs, unsigned int num_configs)
+{
+	struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+	const struct mtk_pin_desc *desc;
+	u32 reg, param, arg;
+	int cfg, err = 0;
+
+	desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
+
+	for (cfg = 0; cfg < num_configs; cfg++) {
+		param = pinconf_to_config_param(configs[cfg]);
+		arg = pinconf_to_config_argument(configs[cfg]);
+
+		switch (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 {
+				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_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 int mtk_pinconf_group_get(struct pinctrl_dev *pctldev,
+				 unsigned int group, unsigned long *config)
+{
+	const unsigned int *pins;
+	unsigned int i, npins, old = 0;
+	int ret;
+
+	ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < npins; i++) {
+		if (mtk_pinconf_get(pctldev, pins[i], config))
+			return -ENOTSUPP;
+
+		/* configs do not match between two pins */
+		if (i && old != *config)
+			return -ENOTSUPP;
+
+		old = *config;
+	}
+
+	return 0;
+}
+
+static int mtk_pinconf_group_set(struct pinctrl_dev *pctldev,
+				 unsigned int group, unsigned long *configs,
+				 unsigned int num_configs)
+{
+	const unsigned int *pins;
+	unsigned int i, npins;
+	int ret;
+
+	ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < npins; i++) {
+		ret = mtk_pinconf_set(pctldev, pins[i], configs, num_configs);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct pinctrl_ops mtk_pctlops = {
+	.get_groups_count = pinctrl_generic_get_group_count,
+	.get_group_name = pinctrl_generic_get_group_name,
+	.get_group_pins = pinctrl_generic_get_group_pins,
+	.dt_node_to_map = pinconf_generic_dt_node_to_map_all,
+	.dt_free_map = pinconf_generic_dt_free_map,
+};
+
+static const struct pinmux_ops mtk_pmxops = {
+	.get_functions_count = pinmux_generic_get_function_count,
+	.get_function_name = pinmux_generic_get_function_name,
+	.get_function_groups = pinmux_generic_get_function_groups,
+	.set_mux = mtk_pinmux_set_mux,
+	.gpio_request_enable = mtk_pinmux_gpio_request_enable,
+	.gpio_set_direction = mtk_pinmux_gpio_set_direction,
+	.strict = true,
+};
+
+static const struct pinconf_ops mtk_confops = {
+	.is_generic = true,
+	.pin_config_get = mtk_pinconf_get,
+	.pin_config_set = mtk_pinconf_set,
+	.pin_config_group_get = mtk_pinconf_group_get,
+	.pin_config_group_set = mtk_pinconf_group_set,
+	.pin_config_config_dbg_show = pinconf_generic_dump_config,
+};
+
+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(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 == (u16)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 == (u16)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->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;
+
+	/* Just for backward compatible for these old pinctrl nodes without
+	 * "gpio-ranges" property. Otherwise, called directly from a
+	 * DeviceTree-supported pinctrl driver is DEPRECATED.
+	 * Please see Section 2.1 of
+	 * Documentation/devicetree/bindings/gpio/gpio.txt on how to
+	 * bind pinctrl and gpio drivers via the "gpio-ranges" property.
+	 */
+	if (!of_find_property(np, "gpio-ranges", NULL)) {
+		ret = gpiochip_add_pin_range(chip, dev_name(hw->dev), 0, 0,
+					     chip->ngpio);
+		if (ret < 0) {
+			gpiochip_remove(chip);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int mtk_build_groups(struct mtk_pinctrl *hw)
+{
+	int err, i;
+
+	for (i = 0; i < hw->soc->ngrps; i++) {
+		const struct group_desc *group = hw->soc->grps + i;
+
+		err = pinctrl_generic_add_group(hw->pctrl, group->name,
+						group->pins, group->num_pins,
+						group->data);
+		if (err < 0) {
+			dev_err(hw->dev, "Failed to register group %s\n",
+				group->name);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+static int mtk_build_functions(struct mtk_pinctrl *hw)
+{
+	int i, err;
+
+	for (i = 0; i < hw->soc->nfuncs ; i++) {
+		const struct function_desc *func = hw->soc->funcs + i;
+
+		err = pinmux_generic_add_function(hw->pctrl, func->name,
+						  func->group_names,
+						  func->num_group_names,
+						  func->data);
+		if (err < 0) {
+			dev_err(hw->dev, "Failed to register function %s\n",
+				func->name);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+int mtk_moore_pinctrl_probe(struct platform_device *pdev,
+			    const struct mtk_pin_soc *soc)
+{
+	struct pinctrl_pin_desc *pins;
+	struct mtk_pinctrl *hw;
+	int err, i;
+
+	hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
+	if (!hw)
+		return -ENOMEM;
+
+	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++) {
+		hw->base[i] = devm_platform_ioremap_resource_byname(pdev,
+						hw->soc->base_names[i]);
+		if (IS_ERR(hw->base[i]))
+			return PTR_ERR(hw->base[i]);
+	}
+
+	hw->nbase = hw->soc->nbase_names;
+
+	/* 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;
+
+	/* Setup groups descriptions per SoC types */
+	err = mtk_build_groups(hw);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to build groups\n");
+		return err;
+	}
+
+	/* Setup functions descriptions per SoC types */
+	err = mtk_build_functions(hw);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to build functions\n");
+		return err;
+	}
+
+	/* For able to make pinctrl_claim_hogs, we must not enable pinctrl
+	 * until all groups and functions are being added one.
+	 */
+	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;
+}