[PATCH 00/12] gpio: convert more GPIO chips to using new value setters

[PATCH 00/12] gpio: convert more GPIO chips to using new value setters

[Bartosz Golaszewski]

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. We're in the process of
converting all GPIO drivers to using the new API. This series converts
another round of GPIO controllers.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
Bartosz Golaszewski (12):
      gpio: dln2: use new line value setter callbacks
      gpio: eic-sprd: use new line value setter callbacks
      gpio: em: use new line value setter callbacks
      gpio: exar: use new line value setter callbacks
      gpio: allow building port-mapped GPIO drivers with COMPILE_TEST=y
      gpio: f7188: use new line value setter callbacks
      gpio: graniterapids: use new line value setter callbacks
      gpio: gw-pld: use new line value setter callbacks
      gpio: htc-egpio: enable building with COMPILE_TEST=y
      gpio: htc-egpio: use new line value setter callbacks
      gpio: ich: enable building with COMPILE_TEST=y
      gpio: ich: use new line value setter callbacks

 drivers/gpio/Kconfig              |  7 +++----
 drivers/gpio/gpio-dln2.c          |  7 ++++---
 drivers/gpio/gpio-eic-sprd.c      |  5 +++--
 drivers/gpio/gpio-em.c            |  6 ++++--
 drivers/gpio/gpio-exar.c          | 16 +++++++++-------
 drivers/gpio/gpio-f7188x.c        | 13 +++++++++----
 drivers/gpio/gpio-graniterapids.c |  6 +++---
 drivers/gpio/gpio-gw-pld.c        |  6 +++---
 drivers/gpio/gpio-htc-egpio.c     | 16 ++++++++--------
 drivers/gpio/gpio-ich.c           | 12 ++++++++----
 10 files changed, 54 insertions(+), 40 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250326-gpiochip-set-rv-gpio-part1-ffdf7af68a3b

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

[PATCH 01/12] gpio: dln2: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-dln2.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-dln2.c b/drivers/gpio/gpio-dln2.c
index 596da59d4b13..4bd3c47eaf93 100644
--- a/drivers/gpio/gpio-dln2.c
+++ b/drivers/gpio/gpio-dln2.c
@@ -220,11 +220,12 @@ static int dln2_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	return dln2_gpio_pin_get_out_val(dln2, offset);
 }
 
-static void dln2_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int dln2_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			 int value)
 {
 	struct dln2_gpio *dln2 = gpiochip_get_data(chip);
 
-	dln2_gpio_pin_set_out_val(dln2, offset, value);
+	return dln2_gpio_pin_set_out_val(dln2, offset, value);
 }
 
 static int dln2_gpio_set_direction(struct gpio_chip *chip, unsigned offset,
@@ -468,7 +469,7 @@ static int dln2_gpio_probe(struct platform_device *pdev)
 	dln2->gpio.base = -1;
 	dln2->gpio.ngpio = pins;
 	dln2->gpio.can_sleep = true;
-	dln2->gpio.set = dln2_gpio_set;
+	dln2->gpio.set_rv = dln2_gpio_set;
 	dln2->gpio.get = dln2_gpio_get;
 	dln2->gpio.request = dln2_gpio_request;
 	dln2->gpio.free = dln2_gpio_free;

-- 
2.45.2

[PATCH 02/12] gpio: eic-sprd: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-eic-sprd.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index d4bf8d187e16..f2973d0b7138 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -203,9 +203,10 @@ static int sprd_eic_direction_input(struct gpio_chip *chip, unsigned int offset)
 	return 0;
 }
 
-static void sprd_eic_set(struct gpio_chip *chip, unsigned int offset, int value)
+static int sprd_eic_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	/* EICs are always input, nothing need to do here. */
+	return 0;
 }
 
 static int sprd_eic_set_debounce(struct gpio_chip *chip, unsigned int offset,
@@ -662,7 +663,7 @@ static int sprd_eic_probe(struct platform_device *pdev)
 		sprd_eic->chip.request = sprd_eic_request;
 		sprd_eic->chip.free = sprd_eic_free;
 		sprd_eic->chip.set_config = sprd_eic_set_config;
-		sprd_eic->chip.set = sprd_eic_set;
+		sprd_eic->chip.set_rv = sprd_eic_set;
 		fallthrough;
 	case SPRD_EIC_ASYNC:
 	case SPRD_EIC_SYNC:

-- 
2.45.2

[PATCH 03/12] gpio: em: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-em.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index 6c862c572322..857c28895131 100644
--- a/drivers/gpio/gpio-em.c
+++ b/drivers/gpio/gpio-em.c
@@ -204,13 +204,15 @@ static void __em_gio_set(struct gpio_chip *chip, unsigned int reg,
 		     (BIT(shift + 16)) | (value << shift));
 }
 
-static void em_gio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int em_gio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	/* output is split into two registers */
 	if (offset < 16)
 		__em_gio_set(chip, GIO_OL, offset, value);
 	else
 		__em_gio_set(chip, GIO_OH, offset - 16, value);
+
+	return 0;
 }
 
 static int em_gio_direction_output(struct gpio_chip *chip, unsigned offset,
@@ -304,7 +306,7 @@ static int em_gio_probe(struct platform_device *pdev)
 	gpio_chip->direction_input = em_gio_direction_input;
 	gpio_chip->get = em_gio_get;
 	gpio_chip->direction_output = em_gio_direction_output;
-	gpio_chip->set = em_gio_set;
+	gpio_chip->set_rv = em_gio_set;
 	gpio_chip->to_irq = em_gio_to_irq;
 	gpio_chip->request = pinctrl_gpio_request;
 	gpio_chip->free = em_gio_free;

-- 
2.45.2

[PATCH 04/12] gpio: exar: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-exar.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
index d5909a4f0433..beb98286d13e 100644
--- a/drivers/gpio/gpio-exar.c
+++ b/drivers/gpio/gpio-exar.c
@@ -93,8 +93,8 @@ static int exar_get_value(struct gpio_chip *chip, unsigned int offset)
 	return !!(regmap_test_bits(exar_gpio->regmap, addr, BIT(bit)));
 }
 
-static void exar_set_value(struct gpio_chip *chip, unsigned int offset,
-			   int value)
+static int exar_set_value(struct gpio_chip *chip, unsigned int offset,
+			  int value)
 {
 	struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip);
 	unsigned int addr = exar_offset_to_lvl_addr(exar_gpio, offset);
@@ -105,7 +105,7 @@ static void exar_set_value(struct gpio_chip *chip, unsigned int offset,
 	 * regmap_write_bits() forces value to be written when an external
 	 * pull up/down might otherwise indicate value was already set.
 	 */
-	regmap_write_bits(exar_gpio->regmap, addr, BIT(bit), bit_value);
+	return regmap_write_bits(exar_gpio->regmap, addr, BIT(bit), bit_value);
 }
 
 static int exar_direction_output(struct gpio_chip *chip, unsigned int offset,
@@ -114,11 +114,13 @@ static int exar_direction_output(struct gpio_chip *chip, unsigned int offset,
 	struct exar_gpio_chip *exar_gpio = gpiochip_get_data(chip);
 	unsigned int addr = exar_offset_to_sel_addr(exar_gpio, offset);
 	unsigned int bit = exar_offset_to_bit(exar_gpio, offset);
+	int ret;
 
-	exar_set_value(chip, offset, value);
-	regmap_clear_bits(exar_gpio->regmap, addr, BIT(bit));
+	ret = exar_set_value(chip, offset, value);
+	if (ret)
+		return ret;
 
-	return 0;
+	return regmap_clear_bits(exar_gpio->regmap, addr, BIT(bit));
 }
 
 static int exar_direction_input(struct gpio_chip *chip, unsigned int offset)
@@ -209,7 +211,7 @@ static int gpio_exar_probe(struct platform_device *pdev)
 	exar_gpio->gpio_chip.direction_input = exar_direction_input;
 	exar_gpio->gpio_chip.get_direction = exar_get_direction;
 	exar_gpio->gpio_chip.get = exar_get_value;
-	exar_gpio->gpio_chip.set = exar_set_value;
+	exar_gpio->gpio_chip.set_rv = exar_set_value;
 	exar_gpio->gpio_chip.base = -1;
 	exar_gpio->gpio_chip.ngpio = ngpios;
 	exar_gpio->index = index;

-- 
2.45.2

[PATCH 05/12] gpio: allow building port-mapped GPIO drivers with COMPILE_TEST=y

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Extend the build coverage by allowing the port-mapped drivers to be
build with COMPILE_TEST enabled.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index f2c39bbff83a..5bbc7f724a09 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -889,7 +889,7 @@ config GPIO_IDT3243X
 endmenu
 
 menu "Port-mapped I/O GPIO drivers"
-	depends on X86 && HAS_IOPORT # I/O space access
+	depends on (X86 && HAS_IOPORT) || COMPILE_TEST # I/O space access
 
 config GPIO_VX855
 	tristate "VIA VX855/VX875 GPIO"

-- 
2.45.2

[PATCH 06/12] gpio: f7188: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-f7188x.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
index 3875fd940ccb..dfcd3634f279 100644
--- a/drivers/gpio/gpio-f7188x.c
+++ b/drivers/gpio/gpio-f7188x.c
@@ -159,7 +159,8 @@ static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
 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(struct gpio_chip *chip, unsigned int offset,
+			   int value);
 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
 				  unsigned long config);
 
@@ -172,7 +173,7 @@ static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
 			.direction_input  = f7188x_gpio_direction_in,	\
 			.get              = f7188x_gpio_get,		\
 			.direction_output = f7188x_gpio_direction_out,	\
-			.set              = f7188x_gpio_set,		\
+			.set_rv           = f7188x_gpio_set,		\
 			.set_config	  = f7188x_gpio_set_config,	\
 			.base             = -1,				\
 			.ngpio            = _ngpio,			\
@@ -391,7 +392,8 @@ static int f7188x_gpio_direction_out(struct gpio_chip *chip,
 	return 0;
 }
 
-static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int f7188x_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			   int value)
 {
 	int err;
 	struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
@@ -400,7 +402,8 @@ static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 
 	err = superio_enter(sio->addr);
 	if (err)
-		return;
+		return err;
+
 	superio_select(sio->addr, sio->device);
 
 	data_out = superio_inb(sio->addr, f7188x_gpio_data_out(bank->regbase));
@@ -411,6 +414,8 @@ static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 	superio_outb(sio->addr, f7188x_gpio_data_out(bank->regbase), data_out);
 
 	superio_exit(sio->addr);
+
+	return 0;
 }
 
 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,

-- 
2.45.2

[PATCH 07/12] gpio: graniterapids: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-graniterapids.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-graniterapids.c b/drivers/gpio/gpio-graniterapids.c
index ad6a045fd3d2..f25283e5239d 100644
--- a/drivers/gpio/gpio-graniterapids.c
+++ b/drivers/gpio/gpio-graniterapids.c
@@ -116,7 +116,7 @@ static int gnr_gpio_get(struct gpio_chip *gc, unsigned int gpio)
 	return !!(dw & GNR_CFG_DW_RXSTATE);
 }
 
-static void gnr_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value)
+static int gnr_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value)
 {
 	u32 clear = 0;
 	u32 set = 0;
@@ -126,7 +126,7 @@ static void gnr_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value)
 	else
 		clear = GNR_CFG_DW_TXSTATE;
 
-	gnr_gpio_configure_line(gc, gpio, clear, set);
+	return gnr_gpio_configure_line(gc, gpio, clear, set);
 }
 
 static int gnr_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio)
@@ -159,7 +159,7 @@ static const struct gpio_chip gnr_gpio_chip = {
 	.owner		  = THIS_MODULE,
 	.request	  = gnr_gpio_request,
 	.get		  = gnr_gpio_get,
-	.set		  = gnr_gpio_set,
+	.set_rv		  = gnr_gpio_set,
 	.get_direction    = gnr_gpio_get_direction,
 	.direction_input  = gnr_gpio_direction_input,
 	.direction_output = gnr_gpio_direction_output,

-- 
2.45.2

[PATCH 08/12] gpio: gw-pld: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-gw-pld.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-gw-pld.c b/drivers/gpio/gpio-gw-pld.c
index 7e29a2d8de1a..a40ba99a3aea 100644
--- a/drivers/gpio/gpio-gw-pld.c
+++ b/drivers/gpio/gpio-gw-pld.c
@@ -62,9 +62,9 @@ static int gw_pld_output8(struct gpio_chip *gc, unsigned offset, int value)
 	return i2c_smbus_write_byte(gw->client, gw->out);
 }
 
-static void gw_pld_set8(struct gpio_chip *gc, unsigned offset, int value)
+static int gw_pld_set8(struct gpio_chip *gc, unsigned int offset, int value)
 {
-	gw_pld_output8(gc, offset, value);
+	return gw_pld_output8(gc, offset, value);
 }
 
 static int gw_pld_probe(struct i2c_client *client)
@@ -86,7 +86,7 @@ static int gw_pld_probe(struct i2c_client *client)
 	gw->chip.direction_input = gw_pld_input8;
 	gw->chip.get = gw_pld_get8;
 	gw->chip.direction_output = gw_pld_output8;
-	gw->chip.set = gw_pld_set8;
+	gw->chip.set_rv = gw_pld_set8;
 	gw->client = client;
 
 	/*

-- 
2.45.2

[PATCH 09/12] gpio: htc-egpio: enable building with COMPILE_TEST=y

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Extend the build coverage by allowing to build the module with
COMPILE_TEST enabled.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 5bbc7f724a09..decd150810b7 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1365,7 +1365,7 @@ config GPIO_DLN2
 
 config HTC_EGPIO
 	bool "HTC EGPIO support"
-	depends on ARM
+	depends on ARM || COMPILE_TEST
 	help
 	  This driver supports the CPLD egpio chip present on
 	  several HTC phones.  It provides basic support for input

-- 
2.45.2

[PATCH 10/12] gpio: htc-egpio: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-htc-egpio.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-htc-egpio.c b/drivers/gpio/gpio-htc-egpio.c
index a40bd56673fe..b1844a676c7c 100644
--- a/drivers/gpio/gpio-htc-egpio.c
+++ b/drivers/gpio/gpio-htc-egpio.c
@@ -170,7 +170,7 @@ static int egpio_direction_input(struct gpio_chip *chip, unsigned offset)
  * Output pins
  */
 
-static void egpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int egpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	unsigned long     flag;
 	struct egpio_chip *egpio;
@@ -198,6 +198,8 @@ static void egpio_set(struct gpio_chip *chip, unsigned offset, int value)
 		egpio->cached_values &= ~(1 << offset);
 	egpio_writew((egpio->cached_values >> shift) & ei->reg_mask, ei, reg);
 	spin_unlock_irqrestore(&ei->lock, flag);
+
+	return 0;
 }
 
 static int egpio_direction_output(struct gpio_chip *chip,
@@ -206,12 +208,10 @@ static int egpio_direction_output(struct gpio_chip *chip,
 	struct egpio_chip *egpio;
 
 	egpio = gpiochip_get_data(chip);
-	if (test_bit(offset, &egpio->is_out)) {
-		egpio_set(chip, offset, value);
-		return 0;
-	} else {
-		return -EINVAL;
-	}
+	if (test_bit(offset, &egpio->is_out))
+		return egpio_set(chip, offset, value);
+
+	return -EINVAL;
 }
 
 static int egpio_get_direction(struct gpio_chip *chip, unsigned offset)
@@ -324,7 +324,7 @@ static int __init egpio_probe(struct platform_device *pdev)
 		chip->parent          = &pdev->dev;
 		chip->owner           = THIS_MODULE;
 		chip->get             = egpio_get;
-		chip->set             = egpio_set;
+		chip->set_rv          = egpio_set;
 		chip->direction_input = egpio_direction_input;
 		chip->direction_output = egpio_direction_output;
 		chip->get_direction   = egpio_get_direction;

-- 
2.45.2

[PATCH 11/12] gpio: ich: enable building with COMPILE_TEST=y

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Extend the build coverage by allowing to build the module with
COMPILE_TEST enabled.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/Kconfig | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index decd150810b7..c13b95813c6c 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -368,8 +368,7 @@ config GPIO_HLWD
 
 config GPIO_ICH
 	tristate "Intel ICH GPIO"
-	depends on X86
-	depends on LPC_ICH
+	depends on (X86 && LPC_ICH) || COMPILE_TEST
 	help
 	  Say yes here to support the GPIO functionality of a number of Intel
 	  ICH-based chipsets.  Currently supported devices: ICH6, ICH7, ICH8

-- 
2.45.2

[PATCH 12/12] gpio: ich: use new line value setter callbacks

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/gpio/gpio-ich.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index 0be9285efebc..67089b2423d8 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -175,12 +175,16 @@ static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned int nr)
 static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned int nr,
 					int val)
 {
+	int ret;
+
 	/* Disable blink hardware which is available for GPIOs from 0 to 31. */
 	if (nr < 32 && ichx_priv.desc->have_blink)
 		ichx_write_bit(GPO_BLINK, nr, 0, 0);
 
 	/* Set GPIO output value. */
-	ichx_write_bit(GPIO_LVL, nr, val, 0);
+	ret = ichx_write_bit(GPIO_LVL, nr, val, 0);
+	if (ret)
+		return ret;
 
 	/*
 	 * Try setting pin as an output and verify it worked since many pins
@@ -252,9 +256,9 @@ static int ich6_gpio_request(struct gpio_chip *chip, unsigned int nr)
 	return ichx_gpio_request(chip, nr);
 }
 
-static void ichx_gpio_set(struct gpio_chip *chip, unsigned int nr, int val)
+static int ichx_gpio_set(struct gpio_chip *chip, unsigned int nr, int val)
 {
-	ichx_write_bit(GPIO_LVL, nr, val, 0);
+	return ichx_write_bit(GPIO_LVL, nr, val, 0);
 }
 
 static void ichx_gpiolib_setup(struct gpio_chip *chip)
@@ -269,7 +273,7 @@ static void ichx_gpiolib_setup(struct gpio_chip *chip)
 	chip->get = ichx_priv.desc->get ?
 		ichx_priv.desc->get : ichx_gpio_get;
 
-	chip->set = ichx_gpio_set;
+	chip->set_rv = ichx_gpio_set;
 	chip->get_direction = ichx_gpio_get_direction;
 	chip->direction_input = ichx_gpio_direction_input;
 	chip->direction_output = ichx_gpio_direction_output;

-- 
2.45.2

Re: [PATCH 01/12] gpio: dln2: use new line value setter callbacks

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:13:10AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.

...

> -static void dln2_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
> +static int dln2_gpio_set(struct gpio_chip *chip, unsigned int offset,
> +			 int value)

It gets even shorter. If you are fan of 80 characters from last decade,
it still fits.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 04/12] gpio: exar: use new line value setter callbacks

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:13:13AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.

...

> -static void exar_set_value(struct gpio_chip *chip, unsigned int offset,
> -			   int value)
> +static int exar_set_value(struct gpio_chip *chip, unsigned int offset,
> +			  int value)

It can be located on one line (81 characters).

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 11/12] gpio: ich: enable building with COMPILE_TEST=y

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:13:20AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> Extend the build coverage by allowing to build the module with
> COMPILE_TEST enabled.

...

>  config GPIO_ICH
>  	tristate "Intel ICH GPIO"
> -	depends on X86
> -	depends on LPC_ICH
> +	depends on (X86 && LPC_ICH) || COMPILE_TEST

I don't see why LPC_ICH should be here.
We do all-or-none approach for compile test for (x86) MFD drivers,
no need to test it separately (it makes a little sense).

	depends on X86 || COMPILE_TEST
	depends on LPC_ICH

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 12/12] gpio: ich: use new line value setter callbacks

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:13:21AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.

I'll take it via my tree. Thanks!

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 05/12] gpio: allow building port-mapped GPIO drivers with COMPILE_TEST=y

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:13:14AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> Extend the build coverage by allowing the port-mapped drivers to be
> build with COMPILE_TEST enabled.

...

>  menu "Port-mapped I/O GPIO drivers"
> -	depends on X86 && HAS_IOPORT # I/O space access
> +	depends on (X86 && HAS_IOPORT) || COMPILE_TEST # I/O space access

Are you sure about this? Do we have IO accessor stubs? I don't remember that.

What about

	depends on HAS_IOPORT # I/O space access
	depends on X86 || COMPILE_TEST

instead?

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 06/12] gpio: f7188: use new line value setter callbacks

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:13:15AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.

...

> -static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
> +static int f7188x_gpio_set(struct gpio_chip *chip, unsigned int offset,
> +			   int value);

Same comment, I suggest you to correct editor configuration to make sure
80 is 80 and not seventy something.

...

> -static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
> +static int f7188x_gpio_set(struct gpio_chip *chip, unsigned int offset,
> +			   int value)

Ditto.

...

But personally I would leave that archaism in the last decade or even century.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 07/12] gpio: graniterapids: use new line value setter callbacks

[Andy Shevchenko]

On Mon, Apr 07, 2025 at 09:13:16AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.

I'll take this via my tree, thanks!

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 05/12] gpio: allow building port-mapped GPIO drivers with COMPILE_TEST=y

[Linus Walleij]

On Mon, Apr 7, 2025 at 9:13 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:

> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> Extend the build coverage by allowing the port-mapped drivers to be
> build with COMPILE_TEST enabled.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

That's really helpful!
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH 11/12] gpio: ich: enable building with COMPILE_TEST=y

[Linus Walleij]

On Mon, Apr 7, 2025 at 9:13 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:

> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> Extend the build coverage by allowing to build the module with
> COMPILE_TEST enabled.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH 09/12] gpio: htc-egpio: enable building with COMPILE_TEST=y

[Linus Walleij]

On Mon, Apr 7, 2025 at 9:25 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:

> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> Extend the build coverage by allowing to build the module with
> COMPILE_TEST enabled.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH 00/12] gpio: convert more GPIO chips to using new value setters

[Bartosz Golaszewski]

On Mon, 07 Apr 2025 09:13:09 +0200, Bartosz Golaszewski wrote:
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. We're in the process of
> converting all GPIO drivers to using the new API. This series converts
> another round of GPIO controllers.
> 
> 

Applied, thanks!

[01/12] gpio: dln2: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/afb4aed832f9000a5d15ecd28a7b2faa5789d28d
[02/12] gpio: eic-sprd: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/21d3c6531b113b1aaecd99ae90dddd55c20f372b
[03/12] gpio: em: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/097cf61ba5bd69328a69c4920f3454089fae0a43
[04/12] gpio: exar: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/bcdd5b37640cc577cd93d20f00519e70d7add8a6
[05/12] gpio: allow building port-mapped GPIO drivers with COMPILE_TEST=y
        https://git.kernel.org/brgl/linux/c/f031312c8e1903859a3a2a58ab5a3f97ba8b0ae9
[06/12] gpio: f7188: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/56193775d1ec9ab5ac23b05c821c26704debe040
[07/12] gpio: graniterapids: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/04eaa41eb8ebb7be4c78d1e57442a581d0bfdc22
[08/12] gpio: gw-pld: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/674817f336bdde5887191c61eaecf3f0a70cd405
[09/12] gpio: htc-egpio: enable building with COMPILE_TEST=y
        https://git.kernel.org/brgl/linux/c/6be51668eda37089d9a484bc8a41c1e9ecd6f577
[10/12] gpio: htc-egpio: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/4c71b46278c2b0cfc8e019e4fe3ec31ce258741e
[11/12] gpio: ich: enable building with COMPILE_TEST=y
        https://git.kernel.org/brgl/linux/c/10b16abc29e17c6ca86bcb8ceebf840e509b0ce5
[12/12] gpio: ich: use new line value setter callbacks
        https://git.kernel.org/brgl/linux/c/69e230a0a288a73ce2a8e9373bcb7b37239cafaa

Best regards,
-- 
Bartosz Golaszewski <brgl@bgdev.pl>

Re: [PATCH 00/12] gpio: convert more GPIO chips to using new value setters

[Andy Shevchenko]

On Wed, Apr 16, 2025 at 05:56:24PM +0200, Bartosz Golaszewski wrote:
> 
> On Mon, 07 Apr 2025 09:13:09 +0200, Bartosz Golaszewski wrote:
> > struct gpio_chip now has callbacks for setting line values that return
> > an integer, allowing to indicate failures. We're in the process of
> > converting all GPIO drivers to using the new API. This series converts
> > another round of GPIO controllers.

> [07/12] gpio: graniterapids: use new line value setter callbacks

> [12/12] gpio: ich: use new line value setter callbacks

I believe I have taken these two via my tree. Can it be like this?

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH 05/12] gpio: allow building port-mapped GPIO drivers with COMPILE_TEST=y

[Bartosz Golaszewski]

On Mon, Apr 7, 2025 at 9:13 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> Extend the build coverage by allowing the port-mapped drivers to be
> build with COMPILE_TEST enabled.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> ---

This caused numerous problems in next so I'm dropping it.

Bartosz