Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 1482 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinctrl-cy8c95x0.c b/drivers/pinctrl/pinctrl-cy8c95x0.c
new file mode 100644
index 0000000000..f2b9db66fd
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-cy8c95x0.c
@@ -0,0 +1,1482 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * CY8C95X0 20/40/60 pin I2C GPIO port expander with interrupt support
+ *
+ * Copyright (C) 2022 9elements GmbH
+ * Authors: Patrick Rudolph <patrick.rudolph@9elements.com>
+ *	    Naresh Solanki <Naresh.Solanki@9elements.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/bitmap.h>
+#include <linux/dmi.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/seq_file.h>
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+/* Fast access registers */
+#define CY8C95X0_INPUT		0x00
+#define CY8C95X0_OUTPUT		0x08
+#define CY8C95X0_INTSTATUS	0x10
+
+#define CY8C95X0_INPUT_(x)	(CY8C95X0_INPUT + (x))
+#define CY8C95X0_OUTPUT_(x)	(CY8C95X0_OUTPUT + (x))
+#define CY8C95X0_INTSTATUS_(x)	(CY8C95X0_INTSTATUS + (x))
+
+/* Port Select configures the port */
+#define CY8C95X0_PORTSEL	0x18
+/* Port settings, write PORTSEL first */
+#define CY8C95X0_INTMASK	0x19
+#define CY8C95X0_PWMSEL		0x1A
+#define CY8C95X0_INVERT		0x1B
+#define CY8C95X0_DIRECTION	0x1C
+/* Drive mode register change state on writing '1' */
+#define CY8C95X0_DRV_PU		0x1D
+#define CY8C95X0_DRV_PD		0x1E
+#define CY8C95X0_DRV_ODH	0x1F
+#define CY8C95X0_DRV_ODL	0x20
+#define CY8C95X0_DRV_PP_FAST	0x21
+#define CY8C95X0_DRV_PP_SLOW	0x22
+#define CY8C95X0_DRV_HIZ	0x23
+#define CY8C95X0_DEVID		0x2E
+#define CY8C95X0_WATCHDOG	0x2F
+#define CY8C95X0_COMMAND	0x30
+
+#define CY8C95X0_PIN_TO_OFFSET(x) (((x) >= 20) ? ((x) + 4) : (x))
+
+static const struct i2c_device_id cy8c95x0_id[] = {
+	{ "cy8c9520", 20, },
+	{ "cy8c9540", 40, },
+	{ "cy8c9560", 60, },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, cy8c95x0_id);
+
+#define OF_CY8C95X(__nrgpio) ((void *)(__nrgpio))
+
+static const struct of_device_id cy8c95x0_dt_ids[] = {
+	{ .compatible = "cypress,cy8c9520", .data = OF_CY8C95X(20), },
+	{ .compatible = "cypress,cy8c9540", .data = OF_CY8C95X(40), },
+	{ .compatible = "cypress,cy8c9560", .data = OF_CY8C95X(60), },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cy8c95x0_dt_ids);
+
+static const struct acpi_gpio_params cy8c95x0_irq_gpios = { 0, 0, true };
+
+static const struct acpi_gpio_mapping cy8c95x0_acpi_irq_gpios[] = {
+	{ "irq-gpios", &cy8c95x0_irq_gpios, 1, ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER },
+	{ }
+};
+
+static int cy8c95x0_acpi_get_irq(struct device *dev)
+{
+	int ret;
+
+	ret = devm_acpi_dev_add_driver_gpios(dev, cy8c95x0_acpi_irq_gpios);
+	if (ret)
+		dev_warn(dev, "can't add GPIO ACPI mapping\n");
+
+	ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0);
+	if (ret < 0)
+		return ret;
+
+	dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n", ret);
+	return ret;
+}
+
+static const struct dmi_system_id cy8c95x0_dmi_acpi_irq_info[] = {
+	{
+		/*
+		 * On Intel Galileo Gen 1 board the IRQ pin is provided
+		 * as an absolute number instead of being relative.
+		 * Since first controller (gpio-sch.c) and second
+		 * (gpio-dwapb.c) are at the fixed bases, we may safely
+		 * refer to the number in the global space to get an IRQ
+		 * out of it.
+		 */
+		.matches = {
+			DMI_EXACT_MATCH(DMI_BOARD_NAME, "Galileo"),
+		},
+	},
+	{}
+};
+
+#define MAX_BANK 8
+#define BANK_SZ 8
+#define MAX_LINE	(MAX_BANK * BANK_SZ)
+
+#define CY8C95X0_GPIO_MASK		GENMASK(7, 0)
+
+/**
+ * struct cy8c95x0_pinctrl - driver data
+ * @regmap:         Device's regmap
+ * @irq_lock:       IRQ bus lock
+ * @i2c_lock:       Mutex for the device internal mux register
+ * @irq_mask:       I/O bits affected by interrupts
+ * @irq_trig_raise: I/O bits affected by raising voltage level
+ * @irq_trig_fall:  I/O bits affected by falling voltage level
+ * @irq_trig_low:   I/O bits affected by a low voltage level
+ * @irq_trig_high:  I/O bits affected by a high voltage level
+ * @push_pull:      I/O bits configured as push pull driver
+ * @shiftmask:      Mask used to compensate for Gport2 width
+ * @nport:          Number of Gports in this chip
+ * @gpio_chip:      gpiolib chip
+ * @driver_data:    private driver data
+ * @regulator:      Pointer to the regulator for the IC
+ * @dev:            struct device
+ * @pctldev:        pin controller device
+ * @pinctrl_desc:   pin controller description
+ * @name:           Chip controller name
+ * @tpin:           Total number of pins
+ */
+struct cy8c95x0_pinctrl {
+	struct regmap *regmap;
+	struct mutex irq_lock;
+	struct mutex i2c_lock;
+	DECLARE_BITMAP(irq_mask, MAX_LINE);
+	DECLARE_BITMAP(irq_trig_raise, MAX_LINE);
+	DECLARE_BITMAP(irq_trig_fall, MAX_LINE);
+	DECLARE_BITMAP(irq_trig_low, MAX_LINE);
+	DECLARE_BITMAP(irq_trig_high, MAX_LINE);
+	DECLARE_BITMAP(push_pull, MAX_LINE);
+	DECLARE_BITMAP(shiftmask, MAX_LINE);
+	int nport;
+	struct gpio_chip gpio_chip;
+	unsigned long driver_data;
+	struct regulator *regulator;
+	struct device *dev;
+	struct pinctrl_dev *pctldev;
+	struct pinctrl_desc pinctrl_desc;
+	char name[32];
+	unsigned int tpin;
+	struct gpio_desc *gpio_reset;
+};
+
+static const struct pinctrl_pin_desc cy8c9560_pins[] = {
+	PINCTRL_PIN(0, "gp00"),
+	PINCTRL_PIN(1, "gp01"),
+	PINCTRL_PIN(2, "gp02"),
+	PINCTRL_PIN(3, "gp03"),
+	PINCTRL_PIN(4, "gp04"),
+	PINCTRL_PIN(5, "gp05"),
+	PINCTRL_PIN(6, "gp06"),
+	PINCTRL_PIN(7, "gp07"),
+
+	PINCTRL_PIN(8, "gp10"),
+	PINCTRL_PIN(9, "gp11"),
+	PINCTRL_PIN(10, "gp12"),
+	PINCTRL_PIN(11, "gp13"),
+	PINCTRL_PIN(12, "gp14"),
+	PINCTRL_PIN(13, "gp15"),
+	PINCTRL_PIN(14, "gp16"),
+	PINCTRL_PIN(15, "gp17"),
+
+	PINCTRL_PIN(16, "gp20"),
+	PINCTRL_PIN(17, "gp21"),
+	PINCTRL_PIN(18, "gp22"),
+	PINCTRL_PIN(19, "gp23"),
+
+	PINCTRL_PIN(20, "gp30"),
+	PINCTRL_PIN(21, "gp31"),
+	PINCTRL_PIN(22, "gp32"),
+	PINCTRL_PIN(23, "gp33"),
+	PINCTRL_PIN(24, "gp34"),
+	PINCTRL_PIN(25, "gp35"),
+	PINCTRL_PIN(26, "gp36"),
+	PINCTRL_PIN(27, "gp37"),
+
+	PINCTRL_PIN(28, "gp40"),
+	PINCTRL_PIN(29, "gp41"),
+	PINCTRL_PIN(30, "gp42"),
+	PINCTRL_PIN(31, "gp43"),
+	PINCTRL_PIN(32, "gp44"),
+	PINCTRL_PIN(33, "gp45"),
+	PINCTRL_PIN(34, "gp46"),
+	PINCTRL_PIN(35, "gp47"),
+
+	PINCTRL_PIN(36, "gp50"),
+	PINCTRL_PIN(37, "gp51"),
+	PINCTRL_PIN(38, "gp52"),
+	PINCTRL_PIN(39, "gp53"),
+	PINCTRL_PIN(40, "gp54"),
+	PINCTRL_PIN(41, "gp55"),
+	PINCTRL_PIN(42, "gp56"),
+	PINCTRL_PIN(43, "gp57"),
+
+	PINCTRL_PIN(44, "gp60"),
+	PINCTRL_PIN(45, "gp61"),
+	PINCTRL_PIN(46, "gp62"),
+	PINCTRL_PIN(47, "gp63"),
+	PINCTRL_PIN(48, "gp64"),
+	PINCTRL_PIN(49, "gp65"),
+	PINCTRL_PIN(50, "gp66"),
+	PINCTRL_PIN(51, "gp67"),
+
+	PINCTRL_PIN(52, "gp70"),
+	PINCTRL_PIN(53, "gp71"),
+	PINCTRL_PIN(54, "gp72"),
+	PINCTRL_PIN(55, "gp73"),
+	PINCTRL_PIN(56, "gp74"),
+	PINCTRL_PIN(57, "gp75"),
+	PINCTRL_PIN(58, "gp76"),
+	PINCTRL_PIN(59, "gp77"),
+};
+
+static const char * const cy8c95x0_groups[] = {
+	"gp00",
+	"gp01",
+	"gp02",
+	"gp03",
+	"gp04",
+	"gp05",
+	"gp06",
+	"gp07",
+
+	"gp10",
+	"gp11",
+	"gp12",
+	"gp13",
+	"gp14",
+	"gp15",
+	"gp16",
+	"gp17",
+
+	"gp20",
+	"gp21",
+	"gp22",
+	"gp23",
+
+	"gp30",
+	"gp31",
+	"gp32",
+	"gp33",
+	"gp34",
+	"gp35",
+	"gp36",
+	"gp37",
+
+	"gp40",
+	"gp41",
+	"gp42",
+	"gp43",
+	"gp44",
+	"gp45",
+	"gp46",
+	"gp47",
+
+	"gp50",
+	"gp51",
+	"gp52",
+	"gp53",
+	"gp54",
+	"gp55",
+	"gp56",
+	"gp57",
+
+	"gp60",
+	"gp61",
+	"gp62",
+	"gp63",
+	"gp64",
+	"gp65",
+	"gp66",
+	"gp67",
+
+	"gp70",
+	"gp71",
+	"gp72",
+	"gp73",
+	"gp74",
+	"gp75",
+	"gp76",
+	"gp77",
+};
+
+static int cy8c95x0_pinmux_direction(struct cy8c95x0_pinctrl *chip,
+				     unsigned int pin, bool input);
+
+static inline u8 cypress_get_port(struct cy8c95x0_pinctrl *chip, unsigned int pin)
+{
+	/* Account for GPORT2 which only has 4 bits */
+	return CY8C95X0_PIN_TO_OFFSET(pin) / BANK_SZ;
+}
+
+static int cypress_get_pin_mask(struct cy8c95x0_pinctrl *chip, unsigned int pin)
+{
+	/* Account for GPORT2 which only has 4 bits */
+	return BIT(CY8C95X0_PIN_TO_OFFSET(pin) % BANK_SZ);
+}
+
+static bool cy8c95x0_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x24 ... 0x27:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool cy8c95x0_writeable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CY8C95X0_INPUT_(0) ... CY8C95X0_INPUT_(7):
+		return false;
+	case CY8C95X0_DEVID:
+		return false;
+	case 0x24 ... 0x27:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool cy8c95x0_volatile_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CY8C95X0_INPUT_(0) ... CY8C95X0_INPUT_(7):
+	case CY8C95X0_INTSTATUS_(0) ... CY8C95X0_INTSTATUS_(7):
+	case CY8C95X0_INTMASK:
+	case CY8C95X0_INVERT:
+	case CY8C95X0_PWMSEL:
+	case CY8C95X0_DIRECTION:
+	case CY8C95X0_DRV_PU:
+	case CY8C95X0_DRV_PD:
+	case CY8C95X0_DRV_ODH:
+	case CY8C95X0_DRV_ODL:
+	case CY8C95X0_DRV_PP_FAST:
+	case CY8C95X0_DRV_PP_SLOW:
+	case CY8C95X0_DRV_HIZ:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool cy8c95x0_precious_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CY8C95X0_INTSTATUS_(0) ... CY8C95X0_INTSTATUS_(7):
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct reg_default cy8c95x0_reg_defaults[] = {
+	{ CY8C95X0_OUTPUT_(0), GENMASK(7, 0) },
+	{ CY8C95X0_OUTPUT_(1), GENMASK(7, 0) },
+	{ CY8C95X0_OUTPUT_(2), GENMASK(7, 0) },
+	{ CY8C95X0_OUTPUT_(3), GENMASK(7, 0) },
+	{ CY8C95X0_OUTPUT_(4), GENMASK(7, 0) },
+	{ CY8C95X0_OUTPUT_(5), GENMASK(7, 0) },
+	{ CY8C95X0_OUTPUT_(6), GENMASK(7, 0) },
+	{ CY8C95X0_OUTPUT_(7), GENMASK(7, 0) },
+	{ CY8C95X0_PORTSEL, 0 },
+	{ CY8C95X0_PWMSEL, 0 },
+};
+
+static const struct regmap_config cy8c95x0_i2c_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.reg_defaults = cy8c95x0_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(cy8c95x0_reg_defaults),
+
+	.readable_reg = cy8c95x0_readable_register,
+	.writeable_reg = cy8c95x0_writeable_register,
+	.volatile_reg = cy8c95x0_volatile_register,
+	.precious_reg = cy8c95x0_precious_register,
+
+	.cache_type = REGCACHE_FLAT,
+	.max_register = CY8C95X0_COMMAND,
+};
+
+static int cy8c95x0_write_regs_mask(struct cy8c95x0_pinctrl *chip, int reg,
+				    unsigned long *val, unsigned long *mask)
+{
+	DECLARE_BITMAP(tmask, MAX_LINE);
+	DECLARE_BITMAP(tval, MAX_LINE);
+	int write_val;
+	int ret = 0;
+	int i, off = 0;
+	u8 bits;
+
+	/* Add the 4 bit gap of Gport2 */
+	bitmap_andnot(tmask, mask, chip->shiftmask, MAX_LINE);
+	bitmap_shift_left(tmask, tmask, 4, MAX_LINE);
+	bitmap_replace(tmask, tmask, mask, chip->shiftmask, BANK_SZ * 3);
+
+	bitmap_andnot(tval, val, chip->shiftmask, MAX_LINE);
+	bitmap_shift_left(tval, tval, 4, MAX_LINE);
+	bitmap_replace(tval, tval, val, chip->shiftmask, BANK_SZ * 3);
+
+	mutex_lock(&chip->i2c_lock);
+	for (i = 0; i < chip->nport; i++) {
+		/* Skip over unused banks */
+		bits = bitmap_get_value8(tmask, i * BANK_SZ);
+		if (!bits)
+			continue;
+
+		switch (reg) {
+		/* Muxed registers */
+		case CY8C95X0_INTMASK:
+		case CY8C95X0_PWMSEL:
+		case CY8C95X0_INVERT:
+		case CY8C95X0_DIRECTION:
+		case CY8C95X0_DRV_PU:
+		case CY8C95X0_DRV_PD:
+		case CY8C95X0_DRV_ODH:
+		case CY8C95X0_DRV_ODL:
+		case CY8C95X0_DRV_PP_FAST:
+		case CY8C95X0_DRV_PP_SLOW:
+		case CY8C95X0_DRV_HIZ:
+			ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, i);
+			if (ret < 0)
+				goto out;
+			off = reg;
+			break;
+		/* Direct access registers */
+		case CY8C95X0_INPUT:
+		case CY8C95X0_OUTPUT:
+		case CY8C95X0_INTSTATUS:
+			off = reg + i;
+			break;
+		default:
+			ret = -EINVAL;
+			goto out;
+		}
+
+		write_val = bitmap_get_value8(tval, i * BANK_SZ);
+
+		ret = regmap_update_bits(chip->regmap, off, bits, write_val);
+		if (ret < 0)
+			goto out;
+	}
+out:
+	mutex_unlock(&chip->i2c_lock);
+
+	if (ret < 0)
+		dev_err(chip->dev, "failed writing register %d: err %d\n", off, ret);
+
+	return ret;
+}
+
+static int cy8c95x0_read_regs_mask(struct cy8c95x0_pinctrl *chip, int reg,
+				   unsigned long *val, unsigned long *mask)
+{
+	DECLARE_BITMAP(tmask, MAX_LINE);
+	DECLARE_BITMAP(tval, MAX_LINE);
+	DECLARE_BITMAP(tmp, MAX_LINE);
+	int read_val;
+	int ret = 0;
+	int i, off = 0;
+	u8 bits;
+
+	/* Add the 4 bit gap of Gport2 */
+	bitmap_andnot(tmask, mask, chip->shiftmask, MAX_LINE);
+	bitmap_shift_left(tmask, tmask, 4, MAX_LINE);
+	bitmap_replace(tmask, tmask, mask, chip->shiftmask, BANK_SZ * 3);
+
+	bitmap_andnot(tval, val, chip->shiftmask, MAX_LINE);
+	bitmap_shift_left(tval, tval, 4, MAX_LINE);
+	bitmap_replace(tval, tval, val, chip->shiftmask, BANK_SZ * 3);
+
+	mutex_lock(&chip->i2c_lock);
+	for (i = 0; i < chip->nport; i++) {
+		/* Skip over unused banks */
+		bits = bitmap_get_value8(tmask, i * BANK_SZ);
+		if (!bits)
+			continue;
+
+		switch (reg) {
+		/* Muxed registers */
+		case CY8C95X0_INTMASK:
+		case CY8C95X0_PWMSEL:
+		case CY8C95X0_INVERT:
+		case CY8C95X0_DIRECTION:
+		case CY8C95X0_DRV_PU:
+		case CY8C95X0_DRV_PD:
+		case CY8C95X0_DRV_ODH:
+		case CY8C95X0_DRV_ODL:
+		case CY8C95X0_DRV_PP_FAST:
+		case CY8C95X0_DRV_PP_SLOW:
+		case CY8C95X0_DRV_HIZ:
+			ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, i);
+			if (ret < 0)
+				goto out;
+			off = reg;
+			break;
+		/* Direct access registers */
+		case CY8C95X0_INPUT:
+		case CY8C95X0_OUTPUT:
+		case CY8C95X0_INTSTATUS:
+			off = reg + i;
+			break;
+		default:
+			ret = -EINVAL;
+			goto out;
+		}
+
+		ret = regmap_read(chip->regmap, off, &read_val);
+		if (ret < 0)
+			goto out;
+
+		read_val &= bits;
+		read_val |= bitmap_get_value8(tval, i * BANK_SZ) & ~bits;
+		bitmap_set_value8(tval, read_val, i * BANK_SZ);
+	}
+
+	/* Fill the 4 bit gap of Gport2 */
+	bitmap_shift_right(tmp, tval, 4, MAX_LINE);
+	bitmap_replace(val, tmp, tval, chip->shiftmask, MAX_LINE);
+
+out:
+	mutex_unlock(&chip->i2c_lock);
+
+	if (ret < 0)
+		dev_err(chip->dev, "failed reading register %d: err %d\n", off, ret);
+
+	return ret;
+}
+
+static int cy8c95x0_gpio_direction_input(struct gpio_chip *gc, unsigned int off)
+{
+	return pinctrl_gpio_direction_input(gc->base + off);
+}
+
+static int cy8c95x0_gpio_direction_output(struct gpio_chip *gc,
+					  unsigned int off, int val)
+{
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	u8 port = cypress_get_port(chip, off);
+	u8 outreg = CY8C95X0_OUTPUT_(port);
+	u8 bit = cypress_get_pin_mask(chip, off);
+	int ret;
+
+	/* Set output level */
+	ret = regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
+	if (ret)
+		return ret;
+
+	return pinctrl_gpio_direction_output(gc->base + off);
+}
+
+static int cy8c95x0_gpio_get_value(struct gpio_chip *gc, unsigned int off)
+{
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	u8 inreg = CY8C95X0_INPUT_(cypress_get_port(chip, off));
+	u8 bit = cypress_get_pin_mask(chip, off);
+	u32 reg_val;
+	int ret;
+
+	ret = regmap_read(chip->regmap, inreg, &reg_val);
+	if (ret < 0) {
+		/*
+		 * NOTE:
+		 * Diagnostic already emitted; that's all we should
+		 * do unless gpio_*_value_cansleep() calls become different
+		 * from their nonsleeping siblings (and report faults).
+		 */
+		return 0;
+	}
+
+	return !!(reg_val & bit);
+}
+
+static void cy8c95x0_gpio_set_value(struct gpio_chip *gc, unsigned int off,
+				    int val)
+{
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	u8 outreg = CY8C95X0_OUTPUT_(cypress_get_port(chip, off));
+	u8 bit = cypress_get_pin_mask(chip, off);
+
+	regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
+}
+
+static int cy8c95x0_gpio_get_direction(struct gpio_chip *gc, unsigned int off)
+{
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	u8 port = cypress_get_port(chip, off);
+	u8 bit = cypress_get_pin_mask(chip, off);
+	u32 reg_val;
+	int ret;
+
+	mutex_lock(&chip->i2c_lock);
+
+	ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+	if (ret < 0)
+		goto out;
+
+	ret = regmap_read(chip->regmap, CY8C95X0_DIRECTION, &reg_val);
+	if (ret < 0)
+		goto out;
+
+	mutex_unlock(&chip->i2c_lock);
+
+	if (reg_val & bit)
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
+out:
+	mutex_unlock(&chip->i2c_lock);
+	return ret;
+}
+
+static int cy8c95x0_gpio_get_pincfg(struct cy8c95x0_pinctrl *chip,
+				    unsigned int off,
+				    unsigned long *config)
+{
+	enum pin_config_param param = pinconf_to_config_param(*config);
+	u8 port = cypress_get_port(chip, off);
+	u8 bit = cypress_get_pin_mask(chip, off);
+	unsigned int reg;
+	u32 reg_val;
+	u16 arg = 0;
+	int ret;
+
+	mutex_lock(&chip->i2c_lock);
+
+	/* Select port */
+	ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+	if (ret < 0)
+		goto out;
+
+	switch (param) {
+	case PIN_CONFIG_BIAS_PULL_UP:
+		reg = CY8C95X0_DRV_PU;
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		reg = CY8C95X0_DRV_PD;
+		break;
+	case PIN_CONFIG_BIAS_DISABLE:
+		reg = CY8C95X0_DRV_HIZ;
+		break;
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+		reg = CY8C95X0_DRV_ODL;
+		break;
+	case PIN_CONFIG_DRIVE_OPEN_SOURCE:
+		reg = CY8C95X0_DRV_ODH;
+		break;
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		reg = CY8C95X0_DRV_PP_FAST;
+		break;
+	case PIN_CONFIG_INPUT_ENABLE:
+		reg = CY8C95X0_DIRECTION;
+		break;
+	case PIN_CONFIG_MODE_PWM:
+		reg = CY8C95X0_PWMSEL;
+		break;
+	case PIN_CONFIG_OUTPUT:
+		reg = CY8C95X0_OUTPUT_(port);
+		break;
+	case PIN_CONFIG_OUTPUT_ENABLE:
+		reg = CY8C95X0_DIRECTION;
+		break;
+
+	case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+	case PIN_CONFIG_BIAS_BUS_HOLD:
+	case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+	case PIN_CONFIG_DRIVE_STRENGTH:
+	case PIN_CONFIG_DRIVE_STRENGTH_UA:
+	case PIN_CONFIG_INPUT_DEBOUNCE:
+	case PIN_CONFIG_INPUT_SCHMITT:
+	case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+	case PIN_CONFIG_MODE_LOW_POWER:
+	case PIN_CONFIG_PERSIST_STATE:
+	case PIN_CONFIG_POWER_SOURCE:
+	case PIN_CONFIG_SKEW_DELAY:
+	case PIN_CONFIG_SLEEP_HARDWARE_STATE:
+	case PIN_CONFIG_SLEW_RATE:
+	default:
+		ret = -ENOTSUPP;
+		goto out;
+	}
+	/*
+	 * Writing 1 to one of the drive mode registers will automatically
+	 * clear conflicting set bits in the other drive mode registers.
+	 */
+	ret = regmap_read(chip->regmap, reg, &reg_val);
+	if (reg_val & bit)
+		arg = 1;
+	if (param == PIN_CONFIG_OUTPUT_ENABLE)
+		arg = !arg;
+
+	*config = pinconf_to_config_packed(param, (u16)arg);
+out:
+	mutex_unlock(&chip->i2c_lock);
+
+	return ret;
+}
+
+static int cy8c95x0_gpio_set_pincfg(struct cy8c95x0_pinctrl *chip,
+				    unsigned int off,
+				    unsigned long config)
+{
+	u8 port = cypress_get_port(chip, off);
+	u8 bit = cypress_get_pin_mask(chip, off);
+	unsigned long param = pinconf_to_config_param(config);
+	unsigned long arg = pinconf_to_config_argument(config);
+	unsigned int reg;
+	int ret;
+
+	mutex_lock(&chip->i2c_lock);
+
+	/* Select port */
+	ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+	if (ret < 0)
+		goto out;
+
+	switch (param) {
+	case PIN_CONFIG_BIAS_PULL_UP:
+		__clear_bit(off, chip->push_pull);
+		reg = CY8C95X0_DRV_PU;
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		__clear_bit(off, chip->push_pull);
+		reg = CY8C95X0_DRV_PD;
+		break;
+	case PIN_CONFIG_BIAS_DISABLE:
+		__clear_bit(off, chip->push_pull);
+		reg = CY8C95X0_DRV_HIZ;
+		break;
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+		__clear_bit(off, chip->push_pull);
+		reg = CY8C95X0_DRV_ODL;
+		break;
+	case PIN_CONFIG_DRIVE_OPEN_SOURCE:
+		__clear_bit(off, chip->push_pull);
+		reg = CY8C95X0_DRV_ODH;
+		break;
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		__set_bit(off, chip->push_pull);
+		reg = CY8C95X0_DRV_PP_FAST;
+		break;
+	case PIN_CONFIG_MODE_PWM:
+		reg = CY8C95X0_PWMSEL;
+		break;
+	case PIN_CONFIG_OUTPUT_ENABLE:
+		ret = cy8c95x0_pinmux_direction(chip, off, !arg);
+		goto out;
+	case PIN_CONFIG_INPUT_ENABLE:
+		ret = cy8c95x0_pinmux_direction(chip, off, arg);
+		goto out;
+	default:
+		ret = -ENOTSUPP;
+		goto out;
+	}
+	/*
+	 * Writing 1 to one of the drive mode registers will automatically
+	 * clear conflicting set bits in the other drive mode registers.
+	 */
+	ret = regmap_write_bits(chip->regmap, reg, bit, bit);
+
+out:
+	mutex_unlock(&chip->i2c_lock);
+	return ret;
+}
+
+static int cy8c95x0_gpio_get_multiple(struct gpio_chip *gc,
+				      unsigned long *mask, unsigned long *bits)
+{
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+
+	return cy8c95x0_read_regs_mask(chip, CY8C95X0_INPUT, bits, mask);
+}
+
+static void cy8c95x0_gpio_set_multiple(struct gpio_chip *gc,
+				       unsigned long *mask, unsigned long *bits)
+{
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+
+	cy8c95x0_write_regs_mask(chip, CY8C95X0_OUTPUT, bits, mask);
+}
+
+static int cy8c95x0_add_pin_ranges(struct gpio_chip *gc)
+{
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	struct device *dev = chip->dev;
+	int ret;
+
+	ret = gpiochip_add_pin_range(gc, dev_name(dev), 0, 0, chip->tpin);
+	if (ret)
+		dev_err(dev, "failed to add GPIO pin range\n");
+
+	return ret;
+}
+
+static int cy8c95x0_setup_gpiochip(struct cy8c95x0_pinctrl *chip)
+{
+	struct gpio_chip *gc = &chip->gpio_chip;
+
+	gc->request = gpiochip_generic_request;
+	gc->free = gpiochip_generic_free;
+	gc->direction_input  = cy8c95x0_gpio_direction_input;
+	gc->direction_output = cy8c95x0_gpio_direction_output;
+	gc->get = cy8c95x0_gpio_get_value;
+	gc->set = cy8c95x0_gpio_set_value;
+	gc->get_direction = cy8c95x0_gpio_get_direction;
+	gc->get_multiple = cy8c95x0_gpio_get_multiple;
+	gc->set_multiple = cy8c95x0_gpio_set_multiple;
+	gc->set_config = gpiochip_generic_config;
+	gc->can_sleep = true;
+	gc->add_pin_ranges = cy8c95x0_add_pin_ranges;
+
+	gc->base = -1;
+	gc->ngpio = chip->tpin;
+
+	gc->parent = chip->dev;
+	gc->owner = THIS_MODULE;
+	gc->names = NULL;
+
+	gc->label = dev_name(chip->dev);
+
+	return devm_gpiochip_add_data(chip->dev, gc, chip);
+}
+
+static void cy8c95x0_irq_mask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+	set_bit(hwirq, chip->irq_mask);
+	gpiochip_disable_irq(gc, hwirq);
+}
+
+static void cy8c95x0_irq_unmask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+	gpiochip_enable_irq(gc, hwirq);
+	clear_bit(hwirq, chip->irq_mask);
+}
+
+static void cy8c95x0_irq_bus_lock(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+
+	mutex_lock(&chip->irq_lock);
+}
+
+static void cy8c95x0_irq_bus_sync_unlock(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	DECLARE_BITMAP(ones, MAX_LINE);
+	DECLARE_BITMAP(irq_mask, MAX_LINE);
+	DECLARE_BITMAP(reg_direction, MAX_LINE);
+
+	bitmap_fill(ones, MAX_LINE);
+
+	cy8c95x0_write_regs_mask(chip, CY8C95X0_INTMASK, chip->irq_mask, ones);
+
+	/* Switch direction to input if needed */
+	cy8c95x0_read_regs_mask(chip, CY8C95X0_DIRECTION, reg_direction, chip->irq_mask);
+	bitmap_or(irq_mask, chip->irq_mask, reg_direction, MAX_LINE);
+	bitmap_complement(irq_mask, irq_mask, MAX_LINE);
+
+	/* Look for any newly setup interrupt */
+	cy8c95x0_write_regs_mask(chip, CY8C95X0_DIRECTION, ones, irq_mask);
+
+	mutex_unlock(&chip->irq_lock);
+}
+
+static int cy8c95x0_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+	unsigned int trig_type;
+
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+	case IRQ_TYPE_EDGE_FALLING:
+	case IRQ_TYPE_EDGE_BOTH:
+		trig_type = type;
+		break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		trig_type = IRQ_TYPE_EDGE_RISING;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		trig_type = IRQ_TYPE_EDGE_FALLING;
+		break;
+	default:
+		dev_err(chip->dev, "irq %d: unsupported type %d\n", d->irq, type);
+		return -EINVAL;
+	}
+
+	assign_bit(hwirq, chip->irq_trig_fall, trig_type & IRQ_TYPE_EDGE_FALLING);
+	assign_bit(hwirq, chip->irq_trig_raise, trig_type & IRQ_TYPE_EDGE_RISING);
+	assign_bit(hwirq, chip->irq_trig_low, type == IRQ_TYPE_LEVEL_LOW);
+	assign_bit(hwirq, chip->irq_trig_high, type == IRQ_TYPE_LEVEL_HIGH);
+
+	return 0;
+}
+
+static void cy8c95x0_irq_shutdown(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+	clear_bit(hwirq, chip->irq_trig_raise);
+	clear_bit(hwirq, chip->irq_trig_fall);
+	clear_bit(hwirq, chip->irq_trig_low);
+	clear_bit(hwirq, chip->irq_trig_high);
+}
+
+static const struct irq_chip cy8c95x0_irqchip = {
+	.name = "cy8c95x0-irq",
+	.irq_mask = cy8c95x0_irq_mask,
+	.irq_unmask = cy8c95x0_irq_unmask,
+	.irq_bus_lock = cy8c95x0_irq_bus_lock,
+	.irq_bus_sync_unlock = cy8c95x0_irq_bus_sync_unlock,
+	.irq_set_type = cy8c95x0_irq_set_type,
+	.irq_shutdown = cy8c95x0_irq_shutdown,
+	.flags = IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static bool cy8c95x0_irq_pending(struct cy8c95x0_pinctrl *chip, unsigned long *pending)
+{
+	DECLARE_BITMAP(ones, MAX_LINE);
+	DECLARE_BITMAP(cur_stat, MAX_LINE);
+	DECLARE_BITMAP(new_stat, MAX_LINE);
+	DECLARE_BITMAP(trigger, MAX_LINE);
+
+	bitmap_fill(ones, MAX_LINE);
+
+	/* Read the current interrupt status from the device */
+	if (cy8c95x0_read_regs_mask(chip, CY8C95X0_INTSTATUS, trigger, ones))
+		return false;
+
+	/* Check latched inputs */
+	if (cy8c95x0_read_regs_mask(chip, CY8C95X0_INPUT, cur_stat, trigger))
+		return false;
+
+	/* Apply filter for rising/falling edge selection */
+	bitmap_replace(new_stat, chip->irq_trig_fall, chip->irq_trig_raise,
+		       cur_stat, MAX_LINE);
+
+	bitmap_and(pending, new_stat, trigger, MAX_LINE);
+
+	return !bitmap_empty(pending, MAX_LINE);
+}
+
+static irqreturn_t cy8c95x0_irq_handler(int irq, void *devid)
+{
+	struct cy8c95x0_pinctrl *chip = devid;
+	struct gpio_chip *gc = &chip->gpio_chip;
+	DECLARE_BITMAP(pending, MAX_LINE);
+	int nested_irq, level;
+	bool ret;
+
+	ret = cy8c95x0_irq_pending(chip, pending);
+	if (!ret)
+		return IRQ_RETVAL(0);
+
+	ret = 0;
+	for_each_set_bit(level, pending, MAX_LINE) {
+		/* Already accounted for 4bit gap in GPort2 */
+		nested_irq = irq_find_mapping(gc->irq.domain, level);
+
+		if (unlikely(nested_irq <= 0)) {
+			dev_warn_ratelimited(gc->parent, "unmapped interrupt %d\n", level);
+			continue;
+		}
+
+		if (test_bit(level, chip->irq_trig_low))
+			while (!cy8c95x0_gpio_get_value(gc, level))
+				handle_nested_irq(nested_irq);
+		else if (test_bit(level, chip->irq_trig_high))
+			while (cy8c95x0_gpio_get_value(gc, level))
+				handle_nested_irq(nested_irq);
+		else
+			handle_nested_irq(nested_irq);
+
+		ret = 1;
+	}
+
+	return IRQ_RETVAL(ret);
+}
+
+static int cy8c95x0_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+
+	return chip->tpin;
+}
+
+static const char *cy8c95x0_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+						   unsigned int group)
+{
+	return cy8c95x0_groups[group];
+}
+
+static int cy8c95x0_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+					   unsigned int group,
+					   const unsigned int **pins,
+					   unsigned int *num_pins)
+{
+	*pins = &cy8c9560_pins[group].number;
+	*num_pins = 1;
+	return 0;
+}
+
+static const char *cy8c95x0_get_fname(unsigned int selector)
+{
+	if (selector == 0)
+		return "gpio";
+	else
+		return "pwm";
+}
+
+static void cy8c95x0_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+				  unsigned int pin)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+	DECLARE_BITMAP(mask, MAX_LINE);
+	DECLARE_BITMAP(pwm, MAX_LINE);
+
+	bitmap_zero(mask, MAX_LINE);
+	__set_bit(pin, mask);
+
+	if (cy8c95x0_read_regs_mask(chip, CY8C95X0_PWMSEL, pwm, mask)) {
+		seq_puts(s, "not available");
+		return;
+	}
+
+	seq_printf(s, "MODE:%s", cy8c95x0_get_fname(test_bit(pin, pwm)));
+}
+
+static const struct pinctrl_ops cy8c95x0_pinctrl_ops = {
+	.get_groups_count = cy8c95x0_pinctrl_get_groups_count,
+	.get_group_name = cy8c95x0_pinctrl_get_group_name,
+	.get_group_pins = cy8c95x0_pinctrl_get_group_pins,
+#ifdef CONFIG_OF
+	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+	.dt_free_map = pinconf_generic_dt_free_map,
+#endif
+	.pin_dbg_show = cy8c95x0_pin_dbg_show,
+};
+
+static const char *cy8c95x0_get_function_name(struct pinctrl_dev *pctldev, unsigned int selector)
+{
+	return cy8c95x0_get_fname(selector);
+}
+
+static int cy8c95x0_get_functions_count(struct pinctrl_dev *pctldev)
+{
+	return 2;
+}
+
+static int cy8c95x0_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector,
+					const char * const **groups,
+					unsigned int * const num_groups)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+
+	*groups = cy8c95x0_groups;
+	*num_groups = chip->tpin;
+	return 0;
+}
+
+static int cy8c95x0_set_mode(struct cy8c95x0_pinctrl *chip, unsigned int off, bool mode)
+{
+	u8 port = cypress_get_port(chip, off);
+	u8 bit = cypress_get_pin_mask(chip, off);
+	int ret;
+
+	/* Select port */
+	ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+	if (ret < 0)
+		return ret;
+
+	return regmap_write_bits(chip->regmap, CY8C95X0_PWMSEL, bit, mode ? bit : 0);
+}
+
+static int cy8c95x0_pinmux_mode(struct cy8c95x0_pinctrl *chip,
+				unsigned int selector, unsigned int group)
+{
+	u8 port = cypress_get_port(chip, group);
+	u8 bit = cypress_get_pin_mask(chip, group);
+	int ret;
+
+	ret = cy8c95x0_set_mode(chip, group, selector);
+	if (ret < 0)
+		return ret;
+
+	if (selector == 0)
+		return 0;
+
+	/* Set direction to output & set output to 1 so that PWM can work */
+	ret = regmap_write_bits(chip->regmap, CY8C95X0_DIRECTION, bit, bit);
+	if (ret < 0)
+		return ret;
+
+	return regmap_write_bits(chip->regmap, CY8C95X0_OUTPUT_(port), bit, bit);
+}
+
+static int cy8c95x0_set_mux(struct pinctrl_dev *pctldev, unsigned int selector,
+			    unsigned int group)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+	int ret;
+
+	mutex_lock(&chip->i2c_lock);
+	ret = cy8c95x0_pinmux_mode(chip, selector, group);
+	mutex_unlock(&chip->i2c_lock);
+
+	return ret;
+}
+
+static int cy8c95x0_gpio_request_enable(struct pinctrl_dev *pctldev,
+					struct pinctrl_gpio_range *range,
+					unsigned int pin)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+	int ret;
+
+	mutex_lock(&chip->i2c_lock);
+	ret = cy8c95x0_set_mode(chip, pin, false);
+	mutex_unlock(&chip->i2c_lock);
+
+	return ret;
+}
+
+static int cy8c95x0_pinmux_direction(struct cy8c95x0_pinctrl *chip,
+				     unsigned int pin, bool input)
+{
+	u8 port = cypress_get_port(chip, pin);
+	u8 bit = cypress_get_pin_mask(chip, pin);
+	int ret;
+
+	/* Select port... */
+	ret = regmap_write(chip->regmap, CY8C95X0_PORTSEL, port);
+	if (ret)
+		return ret;
+
+	/* ...then direction */
+	ret = regmap_write_bits(chip->regmap, CY8C95X0_DIRECTION, bit, input ? bit : 0);
+	if (ret)
+		return ret;
+
+	/*
+	 * Disable driving the pin by forcing it to HighZ. Only setting
+	 * the direction register isn't sufficient in Push-Pull mode.
+	 */
+	if (input && test_bit(pin, chip->push_pull)) {
+		ret = regmap_write_bits(chip->regmap, CY8C95X0_DRV_HIZ, bit, bit);
+		if (ret)
+			return ret;
+
+		__clear_bit(pin, chip->push_pull);
+	}
+
+	return 0;
+}
+
+static int cy8c95x0_gpio_set_direction(struct pinctrl_dev *pctldev,
+				       struct pinctrl_gpio_range *range,
+				       unsigned int pin, bool input)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+	int ret;
+
+	mutex_lock(&chip->i2c_lock);
+	ret = cy8c95x0_pinmux_direction(chip, pin, input);
+	mutex_unlock(&chip->i2c_lock);
+
+	return ret;
+}
+
+static const struct pinmux_ops cy8c95x0_pmxops = {
+	.get_functions_count = cy8c95x0_get_functions_count,
+	.get_function_name = cy8c95x0_get_function_name,
+	.get_function_groups = cy8c95x0_get_function_groups,
+	.set_mux = cy8c95x0_set_mux,
+	.gpio_request_enable = cy8c95x0_gpio_request_enable,
+	.gpio_set_direction = cy8c95x0_gpio_set_direction,
+	.strict = true,
+};
+
+static int cy8c95x0_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+				unsigned long *config)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+
+	return cy8c95x0_gpio_get_pincfg(chip, pin, config);
+}
+
+static int cy8c95x0_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+				unsigned long *configs, unsigned int num_configs)
+{
+	struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
+	int ret = 0;
+	int i;
+
+	for (i = 0; i < num_configs; i++) {
+		ret = cy8c95x0_gpio_set_pincfg(chip, pin, configs[i]);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+static const struct pinconf_ops cy8c95x0_pinconf_ops = {
+	.pin_config_get = cy8c95x0_pinconf_get,
+	.pin_config_set = cy8c95x0_pinconf_set,
+	.is_generic = true,
+};
+
+static int cy8c95x0_irq_setup(struct cy8c95x0_pinctrl *chip, int irq)
+{
+	struct gpio_irq_chip *girq = &chip->gpio_chip.irq;
+	DECLARE_BITMAP(pending_irqs, MAX_LINE);
+	int ret;
+
+	mutex_init(&chip->irq_lock);
+
+	bitmap_zero(pending_irqs, MAX_LINE);
+
+	/* Read IRQ status register to clear all pending interrupts */
+	ret = cy8c95x0_irq_pending(chip, pending_irqs);
+	if (ret) {
+		dev_err(chip->dev, "failed to clear irq status register\n");
+		return ret;
+	}
+
+	/* Mask all interrupts */
+	bitmap_fill(chip->irq_mask, MAX_LINE);
+
+	gpio_irq_chip_set_chip(girq, &cy8c95x0_irqchip);
+
+	/* This will let us handle the parent IRQ in the driver */
+	girq->parent_handler = NULL;
+	girq->num_parents = 0;
+	girq->parents = NULL;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_simple_irq;
+	girq->threaded = true;
+
+	ret = devm_request_threaded_irq(chip->dev, irq,
+					NULL, cy8c95x0_irq_handler,
+					IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_HIGH,
+					dev_name(chip->dev), chip);
+	if (ret) {
+		dev_err(chip->dev, "failed to request irq %d\n", irq);
+		return ret;
+	}
+	dev_info(chip->dev, "Registered threaded IRQ\n");
+
+	return 0;
+}
+
+static int cy8c95x0_setup_pinctrl(struct cy8c95x0_pinctrl *chip)
+{
+	struct pinctrl_desc *pd = &chip->pinctrl_desc;
+
+	pd->pctlops = &cy8c95x0_pinctrl_ops;
+	pd->confops = &cy8c95x0_pinconf_ops;
+	pd->pmxops = &cy8c95x0_pmxops;
+	pd->name = dev_name(chip->dev);
+	pd->pins = cy8c9560_pins;
+	pd->npins = chip->tpin;
+	pd->owner = THIS_MODULE;
+
+	chip->pctldev = devm_pinctrl_register(chip->dev, pd, chip);
+	if (IS_ERR(chip->pctldev))
+		return dev_err_probe(chip->dev, PTR_ERR(chip->pctldev),
+			"can't register controller\n");
+
+	return 0;
+}
+
+static int cy8c95x0_detect(struct i2c_client *client,
+			   struct i2c_board_info *info)
+{
+	struct i2c_adapter *adapter = client->adapter;
+	int ret;
+	const char *name;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -ENODEV;
+
+	ret = i2c_smbus_read_byte_data(client, CY8C95X0_DEVID);
+	if (ret < 0)
+		return ret;
+	switch (ret & GENMASK(7, 4)) {
+	case 0x20:
+		name = cy8c95x0_id[0].name;
+		break;
+	case 0x40:
+		name = cy8c95x0_id[1].name;
+		break;
+	case 0x60:
+		name = cy8c95x0_id[2].name;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	dev_info(&client->dev, "Found a %s chip at 0x%02x.\n", name, client->addr);
+	strscpy(info->type, name, I2C_NAME_SIZE);
+
+	return 0;
+}
+
+static int cy8c95x0_probe(struct i2c_client *client)
+{
+	struct cy8c95x0_pinctrl *chip;
+	struct regulator *reg;
+	int ret;
+
+	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->dev = &client->dev;
+
+	/* Set the device type */
+	chip->driver_data = (unsigned long)device_get_match_data(&client->dev);
+	if (!chip->driver_data)
+		chip->driver_data = i2c_match_id(cy8c95x0_id, client)->driver_data;
+	if (!chip->driver_data)
+		return -ENODEV;
+
+	i2c_set_clientdata(client, chip);
+
+	chip->tpin = chip->driver_data & CY8C95X0_GPIO_MASK;
+	chip->nport = DIV_ROUND_UP(CY8C95X0_PIN_TO_OFFSET(chip->tpin), BANK_SZ);
+
+	switch (chip->tpin) {
+	case 20:
+		strscpy(chip->name, cy8c95x0_id[0].name, I2C_NAME_SIZE);
+		break;
+	case 40:
+		strscpy(chip->name, cy8c95x0_id[1].name, I2C_NAME_SIZE);
+		break;
+	case 60:
+		strscpy(chip->name, cy8c95x0_id[2].name, I2C_NAME_SIZE);
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	reg = devm_regulator_get(&client->dev, "vdd");
+	if (IS_ERR(reg)) {
+		if (PTR_ERR(reg) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+	} else {
+		ret = regulator_enable(reg);
+		if (ret) {
+			dev_err(&client->dev, "failed to enable regulator vdd: %d\n", ret);
+			return ret;
+		}
+		chip->regulator = reg;
+	}
+
+	/* bring the chip out of reset if reset pin is provided */
+	chip->gpio_reset = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(chip->gpio_reset)) {
+		ret = dev_err_probe(chip->dev, PTR_ERR(chip->gpio_reset),
+				    "Failed to get GPIO 'reset'\n");
+		goto err_exit;
+	} else if (chip->gpio_reset) {
+		usleep_range(1000, 2000);
+		gpiod_set_value_cansleep(chip->gpio_reset, 0);
+		usleep_range(250000, 300000);
+
+		gpiod_set_consumer_name(chip->gpio_reset, "CY8C95X0 RESET");
+	}
+
+	chip->regmap = devm_regmap_init_i2c(client, &cy8c95x0_i2c_regmap);
+	if (IS_ERR(chip->regmap)) {
+		ret = PTR_ERR(chip->regmap);
+		goto err_exit;
+	}
+
+	bitmap_zero(chip->push_pull, MAX_LINE);
+	bitmap_zero(chip->shiftmask, MAX_LINE);
+	bitmap_set(chip->shiftmask, 0, 20);
+	mutex_init(&chip->i2c_lock);
+
+	if (dmi_first_match(cy8c95x0_dmi_acpi_irq_info)) {
+		ret = cy8c95x0_acpi_get_irq(&client->dev);
+		if (ret > 0)
+			client->irq = ret;
+	}
+
+	if (client->irq) {
+		ret = cy8c95x0_irq_setup(chip, client->irq);
+		if (ret)
+			goto err_exit;
+	}
+
+	ret = cy8c95x0_setup_pinctrl(chip);
+	if (ret)
+		goto err_exit;
+
+	ret = cy8c95x0_setup_gpiochip(chip);
+	if (ret)
+		goto err_exit;
+
+	return 0;
+
+err_exit:
+	if (!IS_ERR_OR_NULL(chip->regulator))
+		regulator_disable(chip->regulator);
+	return ret;
+}
+
+static void cy8c95x0_remove(struct i2c_client *client)
+{
+	struct cy8c95x0_pinctrl *chip = i2c_get_clientdata(client);
+
+	if (!IS_ERR_OR_NULL(chip->regulator))
+		regulator_disable(chip->regulator);
+}
+
+static const struct acpi_device_id cy8c95x0_acpi_ids[] = {
+	{ "INT3490", 40, },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, cy8c95x0_acpi_ids);
+
+static struct i2c_driver cy8c95x0_driver = {
+	.driver = {
+		.name	= "cy8c95x0-pinctrl",
+		.of_match_table = cy8c95x0_dt_ids,
+		.acpi_match_table = cy8c95x0_acpi_ids,
+	},
+	.probe		= cy8c95x0_probe,
+	.remove		= cy8c95x0_remove,
+	.id_table	= cy8c95x0_id,
+	.detect		= cy8c95x0_detect,
+};
+module_i2c_driver(cy8c95x0_driver);
+
+MODULE_AUTHOR("Patrick Rudolph <patrick.rudolph@9elements.com>");
+MODULE_AUTHOR("Naresh Solanki <naresh.solanki@9elements.com>");
+MODULE_DESCRIPTION("Pinctrl driver for CY8C95X0");
+MODULE_LICENSE("GPL");