pinctrl / gpio: Introduce .set_config() callback for GPIO chips

Currently we already have two pin configuration related callbacks
available for GPIO chips .set_single_ended() and .set_debounce(). In
future we expect to have even more, which does not scale well if we need
to add yet another callback to the GPIO chip structure for each possible
configuration parameter.

Better solution is to reuse what we already have available in the
generic pinconf.

To support this, we introduce a new .set_config() callback for GPIO
chips. The callback takes a single packed pin configuration value as
parameter. This can then be extended easily beyond what is currently
supported by just adding new types to the generic pinconf enum.

If the GPIO driver is backed up by a pinctrl driver the GPIO driver can
just assign gpiochip_generic_config() (introduced in this patch) to
.set_config and that will take care configuration requests are directed
to the pinctrl driver.

We then convert the existing drivers over .set_config() and finally
remove the .set_single_ended() and .set_debounce() callbacks.

Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

18 files changed, 211 insertions, 114 deletions

diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c
index 3d1cf018e8e7..41d0ac142580 100644
--- a/drivers/gpio/gpio-bcm-kona.c
+++ b/drivers/gpio/gpio-bcm-kona.c
@@ -308,6 +308,18 @@ static int bcm_kona_gpio_set_debounce(struct gpio_chip *chip, unsigned gpio,
 	return 0;
 }
 
+static int bcm_kona_gpio_set_config(struct gpio_chip *chip, unsigned gpio,
+				    unsigned long config)
+{
+	u32 debounce;
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	debounce = pinconf_to_config_argument(config);
+	return bcm_kona_gpio_set_debounce(chip, gpio, debounce);
+}
+
 static const struct gpio_chip template_chip = {
 	.label = "bcm-kona-gpio",
 	.owner = THIS_MODULE,
@@ -318,7 +330,7 @@ static const struct gpio_chip template_chip = {
 	.get = bcm_kona_gpio_get,
 	.direction_output = bcm_kona_gpio_direction_output,
 	.set = bcm_kona_gpio_set,
-	.set_debounce = bcm_kona_gpio_set_debounce,
+	.set_config = bcm_kona_gpio_set_config,
 	.to_irq = bcm_kona_gpio_to_irq,
 	.base = 0,
 };
diff --git a/drivers/gpio/gpio-dln2.c b/drivers/gpio/gpio-dln2.c
index 5d38b08d1ee2..aecb847166f5 100644
--- a/drivers/gpio/gpio-dln2.c
+++ b/drivers/gpio/gpio-dln2.c
@@ -272,12 +272,16 @@ static int dln2_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
 	return dln2_gpio_set_direction(chip, offset, DLN2_GPIO_DIRECTION_OUT);
 }
 
-static int dln2_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
-				  unsigned debounce)
+static int dln2_gpio_set_config(struct gpio_chip *chip, unsigned offset,
+				unsigned long config)
 {
 	struct dln2_gpio *dln2 = gpiochip_get_data(chip);
-	__le32 duration = cpu_to_le32(debounce);
+	__le32 duration;
 
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	duration = cpu_to_le32(pinconf_to_config_argument(config));
 	return dln2_transfer_tx(dln2->pdev, DLN2_GPIO_SET_DEBOUNCE,
 				&duration, sizeof(duration));
 }
@@ -474,7 +478,7 @@ static int dln2_gpio_probe(struct platform_device *pdev)
 	dln2->gpio.get_direction = dln2_gpio_get_direction;
 	dln2->gpio.direction_input = dln2_gpio_direction_input;
 	dln2->gpio.direction_output = dln2_gpio_direction_output;
-	dln2->gpio.set_debounce = dln2_gpio_set_debounce;
+	dln2->gpio.set_config = dln2_gpio_set_config;
 
 	platform_set_drvdata(pdev, dln2);
 
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 6193f62c0df4..9c15ee4ef4e9 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -279,6 +279,18 @@ static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
 	return 0;
 }
 
+static int dwapb_gpio_set_config(struct gpio_chip *gc, unsigned offset,
+				 unsigned long config)
+{
+	u32 debounce;
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	debounce = pinconf_to_config_argument(config);
+	return dwapb_gpio_set_debounce(gc, offset, debounce);
+}
+
 static irqreturn_t dwapb_irq_handler_mfd(int irq, void *dev_id)
 {
 	u32 worked;
@@ -426,7 +438,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
 
 	/* Only port A support debounce */
 	if (pp->idx == 0)
-		port->gc.set_debounce = dwapb_gpio_set_debounce;
+		port->gc.set_config = dwapb_gpio_set_config;
 
 	if (pp->irq)
 		dwapb_configure_irqs(gpio, port, pp);
diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index d054219e18b9..45d384039e9b 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -291,15 +291,20 @@ static struct ep93xx_gpio_bank ep93xx_gpio_banks[] = {
 	EP93XX_GPIO_BANK("H", 0x40, 0x44, 56, false),
 };
 
-static int ep93xx_gpio_set_debounce(struct gpio_chip *chip,
-				    unsigned offset, unsigned debounce)
+static int ep93xx_gpio_set_config(struct gpio_chip *chip, unsigned offset,
+				  unsigned long config)
 {
 	int gpio = chip->base + offset;
 	int irq = gpio_to_irq(gpio);
+	u32 debounce;
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
 
 	if (irq < 0)
 		return -EINVAL;
 
+	debounce = pinconf_to_config_argument(config);
 	ep93xx_gpio_int_debounce(irq, debounce ? true : false);
 
 	return 0;
@@ -335,7 +340,7 @@ static int ep93xx_gpio_add_bank(struct gpio_chip *gc, struct device *dev,
 	gc->base = bank->base;
 
 	if (bank->has_debounce) {
-		gc->set_debounce = ep93xx_gpio_set_debounce;
+		gc->set_config = ep93xx_gpio_set_config;
 		gc->to_irq = ep93xx_gpio_to_irq;
 	}
 
diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
index e8accde62aa7..56bd76c33767 100644
--- a/drivers/gpio/gpio-f7188x.c
+++ b/drivers/gpio/gpio-f7188x.c
@@ -131,9 +131,8 @@ static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
 				     unsigned offset, int value);
 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
-static int f7188x_gpio_set_single_ended(struct gpio_chip *gc,
-					unsigned offset,
-					enum single_ended_mode mode);
+static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
+				  unsigned long config);
 
 #define F7188X_GPIO_BANK(_base, _ngpio, _regbase)			\
 	{								\
@@ -145,7 +144,7 @@ static int f7188x_gpio_set_single_ended(struct gpio_chip *gc,
 			.get              = f7188x_gpio_get,		\
 			.direction_output = f7188x_gpio_direction_out,	\
 			.set              = f7188x_gpio_set,		\
-			.set_single_ended = f7188x_gpio_set_single_ended, \
+			.set_config	  = f7188x_gpio_set_config,	\
 			.base             = _base,			\
 			.ngpio            = _ngpio,			\
 			.can_sleep        = true,			\
@@ -326,17 +325,17 @@ static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 	superio_exit(sio->addr);
 }
 
-static int f7188x_gpio_set_single_ended(struct gpio_chip *chip,
-					unsigned offset,
-					enum single_ended_mode mode)
+static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
+				  unsigned long config)
 {
 	int err;
+	enum pin_config_param param = pinconf_to_config_param(config);
 	struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
 	struct f7188x_sio *sio = bank->data->sio;
 	u8 data;
 
-	if (mode != LINE_MODE_OPEN_DRAIN &&
-	    mode != LINE_MODE_PUSH_PULL)
+	if (param != PIN_CONFIG_DRIVE_OPEN_DRAIN &&
+	    param != PIN_CONFIG_DRIVE_PUSH_PULL)
 		return -ENOTSUPP;
 
 	err = superio_enter(sio->addr);
@@ -345,7 +344,7 @@ static int f7188x_gpio_set_single_ended(struct gpio_chip *chip,
 	superio_select(sio->addr, SIO_LD_GPIO);
 
 	data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
-	if (mode == LINE_MODE_OPEN_DRAIN)
+	if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
 		data &= ~BIT(offset);
 	else
 		data |= BIT(offset);
diff --git a/drivers/gpio/gpio-lp873x.c b/drivers/gpio/gpio-lp873x.c
index 218c706359aa..df0ad2cef0d2 100644
--- a/drivers/gpio/gpio-lp873x.c
+++ b/drivers/gpio/gpio-lp873x.c
@@ -100,21 +100,21 @@ static int lp873x_gpio_request(struct gpio_chip *gc, unsigned int offset)
 	return 0;
 }
 
-static int lp873x_gpio_set_single_ended(struct gpio_chip *gc,
-					unsigned int offset,
-					enum single_ended_mode mode)
+static int lp873x_gpio_set_config(struct gpio_chip *gc, unsigned offset,
+				  unsigned long config)
 {
 	struct lp873x_gpio *gpio = gpiochip_get_data(gc);
 
-	switch (mode) {
-	case LINE_MODE_OPEN_DRAIN:
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		return regmap_update_bits(gpio->lp873->regmap,
 					  LP873X_REG_GPO_CTRL,
 					  BIT(offset * BITS_PER_GPO +
 					  LP873X_GPO_CTRL_OD),
 					  BIT(offset * BITS_PER_GPO +
 					  LP873X_GPO_CTRL_OD));
-	case LINE_MODE_PUSH_PULL:
+
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
 		return regmap_update_bits(gpio->lp873->regmap,
 					  LP873X_REG_GPO_CTRL,
 					  BIT(offset * BITS_PER_GPO +
@@ -133,7 +133,7 @@ static const struct gpio_chip template_chip = {
 	.direction_output	= lp873x_gpio_direction_output,
 	.get			= lp873x_gpio_get,
 	.set			= lp873x_gpio_set,
-	.set_single_ended	= lp873x_gpio_set_single_ended,
+	.set_config		= lp873x_gpio_set_config,
 	.base			= -1,
 	.ngpio			= 2,
 	.can_sleep		= true,
diff --git a/drivers/gpio/gpio-max77620.c b/drivers/gpio/gpio-max77620.c
index ec8de4190db9..743459d9477d 100644
--- a/drivers/gpio/gpio-max77620.c
+++ b/drivers/gpio/gpio-max77620.c
@@ -152,11 +152,10 @@ static int max77620_gpio_dir_output(struct gpio_chip *gc, unsigned int offset,
 	return ret;
 }
 
-static int max77620_gpio_set_debounce(struct gpio_chip *gc,
+static int max77620_gpio_set_debounce(struct max77620_gpio *mgpio,
 				      unsigned int offset,
 				      unsigned int debounce)
 {
-	struct max77620_gpio *mgpio = gpiochip_get_data(gc);
 	u8 val;
 	int ret;
 
@@ -202,21 +201,23 @@ static void max77620_gpio_set(struct gpio_chip *gc, unsigned int offset,
 		dev_err(mgpio->dev, "CNFG_GPIO_OUT update failed: %d\n", ret);
 }
 
-static int max77620_gpio_set_single_ended(struct gpio_chip *gc,
-					  unsigned int offset,
-					  enum single_ended_mode mode)
+static int max77620_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
+				    unsigned long config)
 {
 	struct max77620_gpio *mgpio = gpiochip_get_data(gc);
 
-	switch (mode) {
-	case LINE_MODE_OPEN_DRAIN:
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		return regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),
 					  MAX77620_CNFG_GPIO_DRV_MASK,
 					  MAX77620_CNFG_GPIO_DRV_OPENDRAIN);
-	case LINE_MODE_PUSH_PULL:
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
 		return regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),
 					  MAX77620_CNFG_GPIO_DRV_MASK,
 					  MAX77620_CNFG_GPIO_DRV_PUSHPULL);
+	case PIN_CONFIG_INPUT_DEBOUNCE:
+		return max77620_gpio_set_debounce(mgpio, offset,
+			pinconf_to_config_argument(config));
 	default:
 		break;
 	}
@@ -257,9 +258,8 @@ static int max77620_gpio_probe(struct platform_device *pdev)
 	mgpio->gpio_chip.direction_input = max77620_gpio_dir_input;
 	mgpio->gpio_chip.get = max77620_gpio_get;
 	mgpio->gpio_chip.direction_output = max77620_gpio_dir_output;
-	mgpio->gpio_chip.set_debounce = max77620_gpio_set_debounce;
 	mgpio->gpio_chip.set = max77620_gpio_set;
-	mgpio->gpio_chip.set_single_ended = max77620_gpio_set_single_ended;
+	mgpio->gpio_chip.set_config = max77620_gpio_set_config;
 	mgpio->gpio_chip.to_irq = max77620_gpio_to_irq;
 	mgpio->gpio_chip.ngpio = MAX77620_GPIO_NR;
 	mgpio->gpio_chip.can_sleep = 1;
diff --git a/drivers/gpio/gpio-menz127.c b/drivers/gpio/gpio-menz127.c
index a1210e330571..e1037582e34d 100644
--- a/drivers/gpio/gpio-menz127.c
+++ b/drivers/gpio/gpio-menz127.c
@@ -89,22 +89,18 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
 
 static int men_z127_set_single_ended(struct gpio_chip *gc,
 				     unsigned offset,
-				     enum single_ended_mode mode)
+				     enum pin_config_param param)
 {
 	struct men_z127_gpio *priv = gpiochip_get_data(gc);
 	u32 od_en;
 
-	if (mode != LINE_MODE_OPEN_DRAIN &&
-	    mode != LINE_MODE_PUSH_PULL)
-		return -ENOTSUPP;
-
 	spin_lock(&gc->bgpio_lock);
 	od_en = readl(priv->reg_base + MEN_Z127_ODER);
 
-	if (mode == LINE_MODE_OPEN_DRAIN)
+	if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
 		od_en |= BIT(offset);
 	else
-		/* Implicitly LINE_MODE_PUSH_PULL */
+		/* Implicitly PIN_CONFIG_DRIVE_PUSH_PULL */
 		od_en &= ~BIT(offset);
 
 	writel(od_en, priv->reg_base + MEN_Z127_ODER);
@@ -113,6 +109,27 @@ static int men_z127_set_single_ended(struct gpio_chip *gc,
 	return 0;
 }
 
+static int men_z127_set_config(struct gpio_chip *gc, unsigned offset,
+			       unsigned long config)
+{
+	enum pin_config_param param = pinconf_to_config_param(config);
+
+	switch (param) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		return men_z127_set_single_ended(gc, offset, param);
+
+	case PIN_CONFIG_INPUT_DEBOUNCE:
+		return men_z127_debounce(gc, offset,
+			pinconf_to_config_argument(config));
+
+	default:
+		break;
+	}
+
+	return -ENOTSUPP;
+}
+
 static int men_z127_probe(struct mcb_device *mdev,
 			  const struct mcb_device_id *id)
 {
@@ -149,8 +166,7 @@ static int men_z127_probe(struct mcb_device *mdev,
 	if (ret)
 		goto err_unmap;
 
-	men_z127_gpio->gc.set_debounce = men_z127_debounce;
-	men_z127_gpio->gc.set_single_ended = men_z127_set_single_ended;
+	men_z127_gpio->gc.set_config = men_z127_set_config;
 
 	ret = gpiochip_add_data(&men_z127_gpio->gc, men_z127_gpio);
 	if (ret) {
diff --git a/drivers/gpio/gpio-merrifield.c b/drivers/gpio/gpio-merrifield.c
index 69e0f4ace465..f40088d268c1 100644
--- a/drivers/gpio/gpio-merrifield.c
+++ b/drivers/gpio/gpio-merrifield.c
@@ -190,6 +190,18 @@ static int mrfld_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
 	return 0;
 }
 
+static int mrfld_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+				 unsigned long config)
+{
+	u32 debounce;
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	debounce = pinconf_to_config_argument(config);
+	return mrfld_gpio_set_debounce(chip, offset, debounce);
+}
+
 static void mrfld_irq_ack(struct irq_data *d)
 {
 	struct mrfld_gpio *priv = irq_data_get_irq_chip_data(d);
@@ -414,7 +426,7 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 	priv->chip.get = mrfld_gpio_get;
 	priv->chip.set = mrfld_gpio_set;
 	priv->chip.get_direction = mrfld_gpio_get_direction;
-	priv->chip.set_debounce = mrfld_gpio_set_debounce;
+	priv->chip.set_config = mrfld_gpio_set_config;
 	priv->chip.base = gpio_base;
 	priv->chip.ngpio = MRFLD_NGPIO;
 	priv->chip.can_sleep = false;
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index b98ede78c9d8..efc85a279d54 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -974,6 +974,18 @@ static int omap_gpio_debounce(struct gpio_chip *chip, unsigned offset,
 	return 0;
 }
 
+static int omap_gpio_set_config(struct gpio_chip *chip, unsigned offset,
+				unsigned long config)
+{
+	u32 debounce;
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	debounce = pinconf_to_config_argument(config);
+	return omap_gpio_debounce(chip, offset, debounce);
+}
+
 static void omap_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 {
 	struct gpio_bank *bank;
@@ -1045,7 +1057,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
 	bank->chip.direction_input = omap_gpio_input;
 	bank->chip.get = omap_gpio_get;
 	bank->chip.direction_output = omap_gpio_output;
-	bank->chip.set_debounce = omap_gpio_debounce;
+	bank->chip.set_config = omap_gpio_set_config;
 	bank->chip.set = omap_gpio_set;
 	if (bank->is_mpuio) {
 		bank->chip.label = "mpuio";
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index be97101c2c9a..433b45ef332e 100644
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -100,9 +100,8 @@ static int tc3589x_gpio_get_direction(struct gpio_chip *chip,
 	return !(ret & BIT(pos));
 }
 
-static int tc3589x_gpio_set_single_ended(struct gpio_chip *chip,
-					 unsigned int offset,
-					 enum single_ended_mode mode)
+static int tc3589x_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+				   unsigned long config)
 {
 	struct tc3589x_gpio *tc3589x_gpio = gpiochip_get_data(chip);
 	struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
@@ -116,22 +115,22 @@ static int tc3589x_gpio_set_single_ended(struct gpio_chip *chip,
 	unsigned int pos = offset % 8;
 	int ret;
 
-	switch(mode) {
-	case LINE_MODE_OPEN_DRAIN:
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		/* Set open drain mode */
 		ret = tc3589x_set_bits(tc3589x, odmreg, BIT(pos), 0);
 		if (ret)
 			return ret;
 		/* Enable open drain/source mode */
 		return tc3589x_set_bits(tc3589x, odereg, BIT(pos), BIT(pos));
-	case LINE_MODE_OPEN_SOURCE:
+	case PIN_CONFIG_DRIVE_OPEN_SOURCE:
 		/* Set open source mode */
 		ret = tc3589x_set_bits(tc3589x, odmreg, BIT(pos), BIT(pos));
 		if (ret)
 			return ret;
 		/* Enable open drain/source mode */
 		return tc3589x_set_bits(tc3589x, odereg, BIT(pos), BIT(pos));
-	case LINE_MODE_PUSH_PULL:
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
 		/* Disable open drain/source mode */
 		return tc3589x_set_bits(tc3589x, odereg, BIT(pos), 0);
 	default:
@@ -148,7 +147,7 @@ static const struct gpio_chip template_chip = {
 	.direction_output	= tc3589x_gpio_direction_output,
 	.direction_input	= tc3589x_gpio_direction_input,
 	.get_direction		= tc3589x_gpio_get_direction,
-	.set_single_ended	= tc3589x_gpio_set_single_ended,
+	.set_config		= tc3589x_gpio_set_config,
 	.can_sleep		= true,
 };
 
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
index 661b0e34e067..88529d3c06c9 100644
--- a/drivers/gpio/gpio-tegra.c
+++ b/drivers/gpio/gpio-tegra.c
@@ -238,6 +238,18 @@ static int tegra_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
 	return 0;
 }
 
+static int tegra_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+				 unsigned long config)
+{
+	u32 debounce;
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	debounce = pinconf_to_config_argument(config);
+	return tegra_gpio_set_debounce(chip, offset, debounce);
+}
+
 static int tegra_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 {
 	struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
@@ -615,7 +627,7 @@ static int tegra_gpio_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, tgi);
 
 	if (config->debounce_supported)
-		tgi->gc.set_debounce = tegra_gpio_set_debounce;
+		tgi->gc.set_config = tegra_gpio_set_config;
 
 	tgi->bank_info = devm_kzalloc(&pdev->dev, tgi->bank_count *
 				      sizeof(*tgi->bank_info), GFP_KERNEL);
diff --git a/drivers/gpio/gpio-tps65218.c b/drivers/gpio/gpio-tps65218.c
index 46e6dcc089cb..a379bba57d31 100644
--- a/drivers/gpio/gpio-tps65218.c
+++ b/drivers/gpio/gpio-tps65218.c
@@ -139,28 +139,28 @@ static int tps65218_gpio_request(struct gpio_chip *gc, unsigned offset)
 	return 0;
 }
 
-static int tps65218_gpio_set_single_ended(struct gpio_chip *gc,
-					  unsigned offset,
-					  enum single_ended_mode mode)
+static int tps65218_gpio_set_config(struct gpio_chip *gc, unsigned offset,
+				    unsigned long config)
 {
 	struct tps65218_gpio *tps65218_gpio = gpiochip_get_data(gc);
 	struct tps65218 *tps65218 = tps65218_gpio->tps65218;
+	enum pin_config_param param = pinconf_to_config_param(config);
 
 	switch (offset) {
 	case 0:
 	case 2:
 		/* GPO1 is hardwired to be open drain */
-		if (mode == LINE_MODE_OPEN_DRAIN)
+		if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
 			return 0;
 		return -ENOTSUPP;
 	case 1:
 		/* GPO2 is push-pull by default, can be set as open drain. */
-		if (mode == LINE_MODE_OPEN_DRAIN)
+		if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
 			return tps65218_clear_bits(tps65218,
 						   TPS65218_REG_CONFIG1,
 						   TPS65218_CONFIG1_GPO2_BUF,
 						   TPS65218_PROTECT_L1);
-		if (mode == LINE_MODE_PUSH_PULL)
+		if (param == PIN_CONFIG_DRIVE_PUSH_PULL)
 			return tps65218_set_bits(tps65218,
 						 TPS65218_REG_CONFIG1,
 						 TPS65218_CONFIG1_GPO2_BUF,
@@ -181,7 +181,7 @@ static const struct gpio_chip template_chip = {
 	.direction_input	= tps65218_gpio_input,
 	.get			= tps65218_gpio_get,
 	.set			= tps65218_gpio_set,
-	.set_single_ended	= tps65218_gpio_set_single_ended,
+	.set_config		= tps65218_gpio_set_config,
 	.can_sleep		= true,
 	.ngpio			= 3,
 	.base			= -1,
diff --git a/drivers/gpio/gpio-vx855.c b/drivers/gpio/gpio-vx855.c
index 4e450121129b..98a6f1fcc561 100644
--- a/drivers/gpio/gpio-vx855.c
+++ b/drivers/gpio/gpio-vx855.c
@@ -186,23 +186,24 @@ static int vx855gpio_direction_output(struct gpio_chip *gpio,
 	return 0;
 }
 
-static int vx855gpio_set_single_ended(struct gpio_chip *gpio,
-				      unsigned int nr,
-				      enum single_ended_mode mode)
+static int vx855gpio_set_config(struct gpio_chip *gpio, unsigned int nr,
+				unsigned long config)
 {
+	enum pin_config_param param = pinconf_to_config_param(config);
+
 	/* The GPI cannot be single-ended */
 	if (nr < NR_VX855_GPI)
 		return -EINVAL;
 
 	/* The GPO's are push-pull */
 	if (nr < NR_VX855_GPInO) {
-		if (mode != LINE_MODE_PUSH_PULL)
+		if (param != PIN_CONFIG_DRIVE_PUSH_PULL)
 			return -ENOTSUPP;
 		return 0;
 	}
 
 	/* The GPIO's are open drain */
-	if (mode != LINE_MODE_OPEN_DRAIN)
+	if (param != PIN_CONFIG_DRIVE_OPEN_DRAIN)
 		return -ENOTSUPP;
 
 	return 0;
@@ -231,7 +232,7 @@ static void vx855gpio_gpio_setup(struct vx855_gpio *vg)
 	c->direction_output = vx855gpio_direction_output;
 	c->get = vx855gpio_get;
 	c->set = vx855gpio_set;
-	c->set_single_ended = vx855gpio_set_single_ended;
+	c->set_config = vx855gpio_set_config,
 	c->dbg_show = NULL;
 	c->base = 0;
 	c->ngpio = NR_VX855_GP;
diff --git a/drivers/gpio/gpio-wcove.c b/drivers/gpio/gpio-wcove.c
index 34baee5b1dd6..97613de5304e 100644
--- a/drivers/gpio/gpio-wcove.c
+++ b/drivers/gpio/gpio-wcove.c
@@ -202,17 +202,16 @@ static void wcove_gpio_set(struct gpio_chip *chip,
 		regmap_update_bits(wg->regmap, to_reg(gpio, CTRL_OUT), 1, 0);
 }
 
-static int wcove_gpio_set_single_ended(struct gpio_chip *chip,
-					unsigned int gpio,
-					enum single_ended_mode mode)
+static int wcove_gpio_set_config(struct gpio_chip *chip, unsigned int gpio,
+				 unsigned long config)
 {
 	struct wcove_gpio *wg = gpiochip_get_data(chip);
 
-	switch (mode) {
-	case LINE_MODE_OPEN_DRAIN:
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		return regmap_update_bits(wg->regmap, to_reg(gpio, CTRL_OUT),
 						CTLO_DRV_MASK, CTLO_DRV_OD);
-	case LINE_MODE_PUSH_PULL:
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
 		return regmap_update_bits(wg->regmap, to_reg(gpio, CTRL_OUT),
 						CTLO_DRV_MASK, CTLO_DRV_CMOS);
 	default:
@@ -411,7 +410,7 @@ static int wcove_gpio_probe(struct platform_device *pdev)
 	wg->chip.get_direction = wcove_gpio_get_direction;
 	wg->chip.get = wcove_gpio_get;
 	wg->chip.set = wcove_gpio_set;
-	wg->chip.set_single_ended = wcove_gpio_set_single_ended,
+	wg->chip.set_config = wcove_gpio_set_config,
 	wg->chip.base = -1;
 	wg->chip.ngpio = WCOVE_VGPIO_NUM;
 	wg->chip.can_sleep = true;
diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c
index 533707f943f4..00e3839b3f96 100644
--- a/drivers/gpio/gpio-wm831x.c
+++ b/drivers/gpio/gpio-wm831x.c
@@ -101,11 +101,9 @@ static int wm831x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 				  WM831X_IRQ_GPIO_1 + offset);
 }
 
-static int wm831x_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
+static int wm831x_gpio_set_debounce(struct wm831x *wm831x, unsigned offset,
 				    unsigned debounce)
 {
-	struct wm831x_gpio *wm831x_gpio = gpiochip_get_data(chip);
-	struct wm831x *wm831x = wm831x_gpio->wm831x;
 	int reg = WM831X_GPIO1_CONTROL + offset;
 	int ret, fn;
 
@@ -132,21 +130,23 @@ static int wm831x_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
 	return wm831x_set_bits(wm831x, reg, WM831X_GPN_FN_MASK, fn);
 }
 
-static int wm831x_set_single_ended(struct gpio_chip *chip,
-				   unsigned int offset,
-				   enum single_ended_mode mode)
+static int wm831x_set_config(struct gpio_chip *chip, unsigned int offset,
+			     unsigned long config)
 {
 	struct wm831x_gpio *wm831x_gpio = gpiochip_get_data(chip);
 	struct wm831x *wm831x = wm831x_gpio->wm831x;
 	int reg = WM831X_GPIO1_CONTROL + offset;
 
-	switch (mode) {
-	case LINE_MODE_OPEN_DRAIN:
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		return wm831x_set_bits(wm831x, reg,
 				       WM831X_GPN_OD_MASK, WM831X_GPN_OD);
-	case LINE_MODE_PUSH_PULL:
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
 		return wm831x_set_bits(wm831x, reg,
 				       WM831X_GPN_OD_MASK, 0);
+	case PIN_CONFIG_INPUT_DEBOUNCE:
+		return wm831x_gpio_set_debounce(wm831x, offset,
+			pinconf_to_config_argument(config));
 	default:
 		break;
 	}
@@ -255,8 +255,7 @@ static const struct gpio_chip template_chip = {
 	.direction_output	= wm831x_gpio_direction_out,
 	.set			= wm831x_gpio_set,
 	.to_irq			= wm831x_gpio_to_irq,
-	.set_debounce		= wm831x_gpio_set_debounce,
-	.set_single_ended	= wm831x_set_single_ended,
+	.set_config		= wm831x_set_config,
 	.dbg_show		= wm831x_gpio_dbg_show,
 	.can_sleep		= true,
 };
diff --git a/drivers/gpio/gpio-wm8994.c b/drivers/gpio/gpio-wm8994.c
index 68410fda6138..1e35756ac55b 100644
--- a/drivers/gpio/gpio-wm8994.c
+++ b/drivers/gpio/gpio-wm8994.c
@@ -103,19 +103,18 @@ static void wm8994_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 	wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, WM8994_GPN_LVL, value);
 }
 
-static int wm8994_gpio_set_single_ended(struct gpio_chip *chip,
-					unsigned int offset,
-					enum single_ended_mode mode)
+static int wm8994_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+				  unsigned long config)
 {
 	struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
 
-	switch (mode) {
-	case LINE_MODE_OPEN_DRAIN:
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 		return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
 				       WM8994_GPN_OP_CFG_MASK,
 				       WM8994_GPN_OP_CFG);
-	case LINE_MODE_PUSH_PULL:
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
 		return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
 				       WM8994_GPN_OP_CFG_MASK, 0);
 	default:
@@ -257,7 +256,7 @@ static const struct gpio_chip template_chip = {
 	.get			= wm8994_gpio_get,
 	.direction_output	= wm8994_gpio_direction_out,
 	.set			= wm8994_gpio_set,
-	.set_single_ended	= wm8994_gpio_set_single_ended,
+	.set_config		= wm8994_gpio_set_config,
 	.to_irq			= wm8994_gpio_to_irq,
 	.dbg_show		= wm8994_gpio_dbg_show,
 	.can_sleep		= true,
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index f4c26c7826cd..b1659860be1a 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1876,6 +1876,19 @@ void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset)
 }
 EXPORT_SYMBOL_GPL(gpiochip_generic_free);
 
+/**
+ * gpiochip_generic_config() - apply configuration for a pin
+ * @chip: the gpiochip owning the GPIO
+ * @offset: the offset of the GPIO to apply the configuration
+ * @config: the configuration to be applied
+ */
+int gpiochip_generic_config(struct gpio_chip *chip, unsigned offset,
+			    unsigned long config)
+{
+	return pinctrl_gpio_set_config(chip->gpiodev->base + offset, config);
+}
+EXPORT_SYMBOL_GPL(gpiochip_generic_config);
+
 #ifdef CONFIG_PINCTRL
 
 /**
@@ -2264,6 +2277,14 @@ int gpiod_direction_input(struct gpio_desc *desc)
 }
 EXPORT_SYMBOL_GPL(gpiod_direction_input);
 
+static int gpio_set_drive_single_ended(struct gpio_chip *gc, unsigned offset,
+				       enum pin_config_param mode)
+{
+	unsigned long config = { PIN_CONF_PACKED(mode, 0) };
+
+	return gc->set_config ? gc->set_config(gc, offset, config) : -ENOTSUPP;
+}
+
 static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)
 {
 	struct gpio_chip *gc = desc->gdev->chip;
@@ -2280,32 +2301,25 @@ static int _gpiod_direction_output_raw(struct gpio_desc *desc, int value)
 
 	if (test_bit(FLAG_OPEN_DRAIN, &desc->flags)) {
 		/* First see if we can enable open drain in hardware */
-		if (gc->set_single_ended) {
-			ret = gc->set_single_ended(gc, gpio_chip_hwgpio(desc),
-						   LINE_MODE_OPEN_DRAIN);
-			if (!ret)
-				goto set_output_value;
-		}
+		ret = gpio_set_drive_single_ended(gc, gpio_chip_hwgpio(desc),
+						  PIN_CONFIG_DRIVE_OPEN_DRAIN);
+		if (!ret)
+			goto set_output_value;
 		/* Emulate open drain by not actively driving the line high */
 		if (val)
 			return gpiod_direction_input(desc);
 	}
 	else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags)) {
-		if (gc->set_single_ended) {
-			ret = gc->set_single_ended(gc, gpio_chip_hwgpio(desc),
-						   LINE_MODE_OPEN_SOURCE);
-			if (!ret)
-				goto set_output_value;
-		}
+		ret = gpio_set_drive_single_ended(gc, gpio_chip_hwgpio(desc),
+						  PIN_CONFIG_DRIVE_OPEN_SOURCE);
+		if (!ret)
+			goto set_output_value;
 		/* Emulate open source by not actively driving the line low */
 		if (!val)
 			return gpiod_direction_input(desc);
 	} else {
-		/* Make sure to disable open drain/source hardware, if any */
-		if (gc->set_single_ended)
-			gc->set_single_ended(gc,
-					     gpio_chip_hwgpio(desc),
-					     LINE_MODE_PUSH_PULL);
+		gpio_set_drive_single_ended(gc, gpio_chip_hwgpio(desc),
+					    PIN_CONFIG_DRIVE_PUSH_PULL);
 	}
 
 set_output_value:
@@ -2376,17 +2390,19 @@ EXPORT_SYMBOL_GPL(gpiod_direction_output);
 int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
 {
 	struct gpio_chip	*chip;
+	unsigned long		config;
 
 	VALIDATE_DESC(desc);
 	chip = desc->gdev->chip;
-	if (!chip->set || !chip->set_debounce) {
+	if (!chip->set || !chip->set_config) {
 		gpiod_dbg(desc,
-			  "%s: missing set() or set_debounce() operations\n",
+			  "%s: missing set() or set_config() operations\n",
 			  __func__);
 		return -ENOTSUPP;
 	}
 
-	return chip->set_debounce(chip, gpio_chip_hwgpio(desc), debounce);
+	config = pinconf_to_config_packed(PIN_CONFIG_INPUT_DEBOUNCE, debounce);
+	return chip->set_config(chip, gpio_chip_hwgpio(desc), config);
 }
 EXPORT_SYMBOL_GPL(gpiod_set_debounce);