[PATCH v4 0/3] int3472: Support GPIO con_id based on _HID

[PATCH v4 0/3] int3472: Support GPIO con_id based on _HID

[Sakari Ailus]

Hi folks,

One patch turned into a set, the second patch being the original one.

since v3:

- Add a patch (first one) to switch to unsigned long type for polarity
  field and renames it as gpio_flags.

- Use a polarity_low boolean field for indicating the GPIO polarity. This
  is turned to gpio_flags in int3472_get_con_id_and_polarity().

- Put the new polarity_low bool field next to the u8's for better struct
  packing.

- Add a patch (last one) to rename "func" as "con_id" which is used
  throughout the GPIO framework.

Sakari Ailus (3):
  platform/x86: int3472: Use correct type for "polarity", call it
    gpio_flags
  platform/x86: int3472: Call "reset" GPIO "enable" for INT347E
  platform/x86: int3472: Call "func" "con_id" instead

 drivers/platform/x86/intel/int3472/discrete.c | 98 +++++++++++++------
 1 file changed, 68 insertions(+), 30 deletions(-)

-- 
2.39.5

[PATCH v4 1/3] platform/x86: int3472: Use correct type for "polarity", call it gpio_flags

[Sakari Ailus]

Struct gpiod_lookup flags field's type is unsigned long. Thus use unsigned
long for values to be assigned to that field. Similarly, also call the
field gpio_flags which it really is.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/platform/x86/intel/int3472/discrete.c | 39 ++++++++++---------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
index d881b2cfcdfc..3f7624714869 100644
--- a/drivers/platform/x86/intel/int3472/discrete.c
+++ b/drivers/platform/x86/intel/int3472/discrete.c
@@ -55,7 +55,7 @@ static void skl_int3472_log_sensor_module_name(struct int3472_discrete_device *i
 
 static int skl_int3472_fill_gpiod_lookup(struct gpiod_lookup *table_entry,
 					 struct acpi_resource_gpio *agpio,
-					 const char *func, u32 polarity)
+					 const char *func, unsigned long gpio_flags)
 {
 	char *path = agpio->resource_source.string_ptr;
 	struct acpi_device *adev;
@@ -70,14 +70,14 @@ static int skl_int3472_fill_gpiod_lookup(struct gpiod_lookup *table_entry,
 	if (!adev)
 		return -ENODEV;
 
-	*table_entry = GPIO_LOOKUP(acpi_dev_name(adev), agpio->pin_table[0], func, polarity);
+	*table_entry = GPIO_LOOKUP(acpi_dev_name(adev), agpio->pin_table[0], func, gpio_flags);
 
 	return 0;
 }
 
 static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int3472,
 					  struct acpi_resource_gpio *agpio,
-					  const char *func, u32 polarity)
+					  const char *func, unsigned long gpio_flags)
 {
 	int ret;
 
@@ -87,7 +87,7 @@ static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int347
 	}
 
 	ret = skl_int3472_fill_gpiod_lookup(&int3472->gpios.table[int3472->n_sensor_gpios],
-					    agpio, func, polarity);
+					    agpio, func, gpio_flags);
 	if (ret)
 		return ret;
 
@@ -100,7 +100,7 @@ static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int347
 static struct gpio_desc *
 skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
 				       struct acpi_resource_gpio *agpio,
-				       const char *func, u32 polarity)
+				       const char *func, unsigned long gpio_flags)
 {
 	struct gpio_desc *desc;
 	int ret;
@@ -111,7 +111,7 @@ skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
 		return ERR_PTR(-ENOMEM);
 
 	lookup->dev_id = dev_name(int3472->dev);
-	ret = skl_int3472_fill_gpiod_lookup(&lookup->table[0], agpio, func, polarity);
+	ret = skl_int3472_fill_gpiod_lookup(&lookup->table[0], agpio, func, gpio_flags);
 	if (ret)
 		return ERR_PTR(ret);
 
@@ -122,32 +122,33 @@ skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
 	return desc;
 }
 
-static void int3472_get_func_and_polarity(u8 type, const char **func, u32 *polarity)
+static void int3472_get_func_and_polarity(u8 type, const char **func,
+					  unsigned long *gpio_flags)
 {
 	switch (type) {
 	case INT3472_GPIO_TYPE_RESET:
 		*func = "reset";
-		*polarity = GPIO_ACTIVE_LOW;
+		*gpio_flags = GPIO_ACTIVE_LOW;
 		break;
 	case INT3472_GPIO_TYPE_POWERDOWN:
 		*func = "powerdown";
-		*polarity = GPIO_ACTIVE_LOW;
+		*gpio_flags = GPIO_ACTIVE_LOW;
 		break;
 	case INT3472_GPIO_TYPE_CLK_ENABLE:
 		*func = "clk-enable";
-		*polarity = GPIO_ACTIVE_HIGH;
+		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	case INT3472_GPIO_TYPE_PRIVACY_LED:
 		*func = "privacy-led";
-		*polarity = GPIO_ACTIVE_HIGH;
+		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	case INT3472_GPIO_TYPE_POWER_ENABLE:
 		*func = "power-enable";
-		*polarity = GPIO_ACTIVE_HIGH;
+		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	default:
 		*func = "unknown";
-		*polarity = GPIO_ACTIVE_HIGH;
+		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	}
 }
@@ -194,7 +195,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 	struct gpio_desc *gpio;
 	const char *err_msg;
 	const char *func;
-	u32 polarity;
+	unsigned long gpio_flags;
 	int ret;
 
 	if (!acpi_gpio_get_io_resource(ares, &agpio))
@@ -217,7 +218,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 
 	type = FIELD_GET(INT3472_GPIO_DSM_TYPE, obj->integer.value);
 
-	int3472_get_func_and_polarity(type, &func, &polarity);
+	int3472_get_func_and_polarity(type, &func, &gpio_flags);
 
 	pin = FIELD_GET(INT3472_GPIO_DSM_PIN, obj->integer.value);
 	if (pin != agpio->pin_table[0])
@@ -227,16 +228,16 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 
 	active_value = FIELD_GET(INT3472_GPIO_DSM_SENSOR_ON_VAL, obj->integer.value);
 	if (!active_value)
-		polarity ^= GPIO_ACTIVE_LOW;
+		gpio_flags ^= GPIO_ACTIVE_LOW;
 
 	dev_dbg(int3472->dev, "%s %s pin %d active-%s\n", func,
 		agpio->resource_source.string_ptr, agpio->pin_table[0],
-		str_high_low(polarity == GPIO_ACTIVE_HIGH));
+		str_high_low(gpio_flags == GPIO_ACTIVE_HIGH));
 
 	switch (type) {
 	case INT3472_GPIO_TYPE_RESET:
 	case INT3472_GPIO_TYPE_POWERDOWN:
-		ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, func, polarity);
+		ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, func, gpio_flags);
 		if (ret)
 			err_msg = "Failed to map GPIO pin to sensor\n";
 
@@ -244,7 +245,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 	case INT3472_GPIO_TYPE_CLK_ENABLE:
 	case INT3472_GPIO_TYPE_PRIVACY_LED:
 	case INT3472_GPIO_TYPE_POWER_ENABLE:
-		gpio = skl_int3472_gpiod_get_from_temp_lookup(int3472, agpio, func, polarity);
+		gpio = skl_int3472_gpiod_get_from_temp_lookup(int3472, agpio, func, gpio_flags);
 		if (IS_ERR(gpio)) {
 			ret = PTR_ERR(gpio);
 			err_msg = "Failed to get GPIO\n";
-- 
2.39.5

[PATCH v4 2/3] platform/x86: int3472: Call "reset" GPIO "enable" for INT347E

[Sakari Ailus]

The DT bindings for ov7251 specify "enable" GPIO (xshutdown in
documentation) but the int3472 indiscriminately provides this as a "reset"
GPIO to sensor drivers. Take this into account by assigning it as "enable"
with active high polarity for INT347E devices, i.e. ov7251. "reset" with
active low polarity remains the default GPIO name for other devices.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/platform/x86/intel/int3472/discrete.c | 45 +++++++++++++++++--
 1 file changed, 41 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
index 3f7624714869..3f3f50ce431c 100644
--- a/drivers/platform/x86/intel/int3472/discrete.c
+++ b/drivers/platform/x86/intel/int3472/discrete.c
@@ -2,6 +2,7 @@
 /* Author: Dan Scally <djrscally@gmail.com> */
 
 #include <linux/acpi.h>
+#include <linux/array_size.h>
 #include <linux/bitfield.h>
 #include <linux/device.h>
 #include <linux/gpio/consumer.h>
@@ -122,10 +123,46 @@ skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
 	return desc;
 }
 
-static void int3472_get_func_and_polarity(u8 type, const char **func,
-					  unsigned long *gpio_flags)
+/**
+ * struct int3472_gpio_map - Map GPIOs to whatever is expected by the
+ * sensor driver (as in DT bindings)
+ * @hid: The ACPI HID of the device without the instance number e.g. INT347E
+ * @type_from: The GPIO type from ACPI ?SDT
+ * @type_to: The assigned GPIO type, typically same as @type_from
+ * @func: The function, e.g. "enable"
+ * @polarity_low: GPIO_ACTIVE_LOW true if the @polarity_low is true,
+ * GPIO_ACTIVE_HIGH otherwise
+ */
+struct int3472_gpio_map {
+	const char *hid;
+	u8 type_from;
+	u8 type_to;
+	bool polarity_low;
+	const char *func;
+};
+
+static const struct int3472_gpio_map int3472_gpio_map[] = {
+	{ "INT347E", INT3472_GPIO_TYPE_RESET, INT3472_GPIO_TYPE_RESET, false, "enable" },
+};
+
+static void int3472_get_func_and_polarity(struct acpi_device *adev, u8 *type,
+					  const char **func, unsigned long *gpio_flags)
 {
-	switch (type) {
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(int3472_gpio_map); i++) {
+		if (*type != int3472_gpio_map[i].type_from ||
+		    !acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
+			continue;
+
+		*type = int3472_gpio_map[i].type_to;
+		*gpio_flags = int3472_gpio_map[i].polarity_low ?
+			GPIO_ACTIVE_LOW : GPIO_ACTIVE_HIGH;
+		*func = int3472_gpio_map[i].func;
+		return;
+	}
+
+	switch (*type) {
 	case INT3472_GPIO_TYPE_RESET:
 		*func = "reset";
 		*gpio_flags = GPIO_ACTIVE_LOW;
@@ -218,7 +255,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 
 	type = FIELD_GET(INT3472_GPIO_DSM_TYPE, obj->integer.value);
 
-	int3472_get_func_and_polarity(type, &func, &gpio_flags);
+	int3472_get_func_and_polarity(int3472->sensor, &type, &func, &gpio_flags);
 
 	pin = FIELD_GET(INT3472_GPIO_DSM_PIN, obj->integer.value);
 	if (pin != agpio->pin_table[0])
-- 
2.39.5

[PATCH v4 3/3] platform/x86: int3472: Call "func" "con_id" instead

[Sakari Ailus]

"con_id" is an established variable name for the GPIO naming for drivers.
Use it instead of "func" in the int3472 driver, too.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/platform/x86/intel/int3472/discrete.c | 48 +++++++++----------
 1 file changed, 24 insertions(+), 24 deletions(-)

diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
index 3f3f50ce431c..4b0c72595c2b 100644
--- a/drivers/platform/x86/intel/int3472/discrete.c
+++ b/drivers/platform/x86/intel/int3472/discrete.c
@@ -56,7 +56,7 @@ static void skl_int3472_log_sensor_module_name(struct int3472_discrete_device *i
 
 static int skl_int3472_fill_gpiod_lookup(struct gpiod_lookup *table_entry,
 					 struct acpi_resource_gpio *agpio,
-					 const char *func, unsigned long gpio_flags)
+					 const char *con_id, unsigned long gpio_flags)
 {
 	char *path = agpio->resource_source.string_ptr;
 	struct acpi_device *adev;
@@ -71,14 +71,14 @@ static int skl_int3472_fill_gpiod_lookup(struct gpiod_lookup *table_entry,
 	if (!adev)
 		return -ENODEV;
 
-	*table_entry = GPIO_LOOKUP(acpi_dev_name(adev), agpio->pin_table[0], func, gpio_flags);
+	*table_entry = GPIO_LOOKUP(acpi_dev_name(adev), agpio->pin_table[0], con_id, gpio_flags);
 
 	return 0;
 }
 
 static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int3472,
 					  struct acpi_resource_gpio *agpio,
-					  const char *func, unsigned long gpio_flags)
+					  const char *con_id, unsigned long gpio_flags)
 {
 	int ret;
 
@@ -88,7 +88,7 @@ static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int347
 	}
 
 	ret = skl_int3472_fill_gpiod_lookup(&int3472->gpios.table[int3472->n_sensor_gpios],
-					    agpio, func, gpio_flags);
+					    agpio, con_id, gpio_flags);
 	if (ret)
 		return ret;
 
@@ -101,7 +101,7 @@ static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int347
 static struct gpio_desc *
 skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
 				       struct acpi_resource_gpio *agpio,
-				       const char *func, unsigned long gpio_flags)
+				       const char *con_id, unsigned long gpio_flags)
 {
 	struct gpio_desc *desc;
 	int ret;
@@ -112,12 +112,12 @@ skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
 		return ERR_PTR(-ENOMEM);
 
 	lookup->dev_id = dev_name(int3472->dev);
-	ret = skl_int3472_fill_gpiod_lookup(&lookup->table[0], agpio, func, gpio_flags);
+	ret = skl_int3472_fill_gpiod_lookup(&lookup->table[0], agpio, con_id, gpio_flags);
 	if (ret)
 		return ERR_PTR(ret);
 
 	gpiod_add_lookup_table(lookup);
-	desc = devm_gpiod_get(int3472->dev, func, GPIOD_OUT_LOW);
+	desc = devm_gpiod_get(int3472->dev, con_id, GPIOD_OUT_LOW);
 	gpiod_remove_lookup_table(lookup);
 
 	return desc;
@@ -129,7 +129,7 @@ skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
  * @hid: The ACPI HID of the device without the instance number e.g. INT347E
  * @type_from: The GPIO type from ACPI ?SDT
  * @type_to: The assigned GPIO type, typically same as @type_from
- * @func: The function, e.g. "enable"
+ * @con_id: The name of the GPIO for the device
  * @polarity_low: GPIO_ACTIVE_LOW true if the @polarity_low is true,
  * GPIO_ACTIVE_HIGH otherwise
  */
@@ -138,15 +138,15 @@ struct int3472_gpio_map {
 	u8 type_from;
 	u8 type_to;
 	bool polarity_low;
-	const char *func;
+	const char *con_id;
 };
 
 static const struct int3472_gpio_map int3472_gpio_map[] = {
 	{ "INT347E", INT3472_GPIO_TYPE_RESET, INT3472_GPIO_TYPE_RESET, false, "enable" },
 };
 
-static void int3472_get_func_and_polarity(struct acpi_device *adev, u8 *type,
-					  const char **func, unsigned long *gpio_flags)
+static void int3472_get_con_id_and_polarity(struct acpi_device *adev, u8 *type,
+					    const char **con_id, unsigned long *gpio_flags)
 {
 	unsigned int i;
 
@@ -158,33 +158,33 @@ static void int3472_get_func_and_polarity(struct acpi_device *adev, u8 *type,
 		*type = int3472_gpio_map[i].type_to;
 		*gpio_flags = int3472_gpio_map[i].polarity_low ?
 			GPIO_ACTIVE_LOW : GPIO_ACTIVE_HIGH;
-		*func = int3472_gpio_map[i].func;
+		*con_id = int3472_gpio_map[i].con_id;
 		return;
 	}
 
 	switch (*type) {
 	case INT3472_GPIO_TYPE_RESET:
-		*func = "reset";
+		*con_id = "reset";
 		*gpio_flags = GPIO_ACTIVE_LOW;
 		break;
 	case INT3472_GPIO_TYPE_POWERDOWN:
-		*func = "powerdown";
+		*con_id = "powerdown";
 		*gpio_flags = GPIO_ACTIVE_LOW;
 		break;
 	case INT3472_GPIO_TYPE_CLK_ENABLE:
-		*func = "clk-enable";
+		*con_id = "clk-enable";
 		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	case INT3472_GPIO_TYPE_PRIVACY_LED:
-		*func = "privacy-led";
+		*con_id = "privacy-led";
 		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	case INT3472_GPIO_TYPE_POWER_ENABLE:
-		*func = "power-enable";
+		*con_id = "power-enable";
 		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	default:
-		*func = "unknown";
+		*con_id = "unknown";
 		*gpio_flags = GPIO_ACTIVE_HIGH;
 		break;
 	}
@@ -231,7 +231,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 	union acpi_object *obj;
 	struct gpio_desc *gpio;
 	const char *err_msg;
-	const char *func;
+	const char *con_id;
 	unsigned long gpio_flags;
 	int ret;
 
@@ -255,26 +255,26 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 
 	type = FIELD_GET(INT3472_GPIO_DSM_TYPE, obj->integer.value);
 
-	int3472_get_func_and_polarity(int3472->sensor, &type, &func, &gpio_flags);
+	int3472_get_con_id_and_polarity(int3472->sensor, &type, &con_id, &gpio_flags);
 
 	pin = FIELD_GET(INT3472_GPIO_DSM_PIN, obj->integer.value);
 	if (pin != agpio->pin_table[0])
 		dev_warn(int3472->dev, "%s %s pin number mismatch _DSM %d resource %d\n",
-			 func, agpio->resource_source.string_ptr, pin,
+			 con_id, agpio->resource_source.string_ptr, pin,
 			 agpio->pin_table[0]);
 
 	active_value = FIELD_GET(INT3472_GPIO_DSM_SENSOR_ON_VAL, obj->integer.value);
 	if (!active_value)
 		gpio_flags ^= GPIO_ACTIVE_LOW;
 
-	dev_dbg(int3472->dev, "%s %s pin %d active-%s\n", func,
+	dev_dbg(int3472->dev, "%s %s pin %d active-%s\n", con_id,
 		agpio->resource_source.string_ptr, agpio->pin_table[0],
 		str_high_low(gpio_flags == GPIO_ACTIVE_HIGH));
 
 	switch (type) {
 	case INT3472_GPIO_TYPE_RESET:
 	case INT3472_GPIO_TYPE_POWERDOWN:
-		ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, func, gpio_flags);
+		ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, con_id, gpio_flags);
 		if (ret)
 			err_msg = "Failed to map GPIO pin to sensor\n";
 
@@ -282,7 +282,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
 	case INT3472_GPIO_TYPE_CLK_ENABLE:
 	case INT3472_GPIO_TYPE_PRIVACY_LED:
 	case INT3472_GPIO_TYPE_POWER_ENABLE:
-		gpio = skl_int3472_gpiod_get_from_temp_lookup(int3472, agpio, func, gpio_flags);
+		gpio = skl_int3472_gpiod_get_from_temp_lookup(int3472, agpio, con_id, gpio_flags);
 		if (IS_ERR(gpio)) {
 			ret = PTR_ERR(gpio);
 			err_msg = "Failed to get GPIO\n";
-- 
2.39.5

Re: [PATCH v4 0/3] int3472: Support GPIO con_id based on _HID

[Hans de Goede]

Hi,

On 31-Jan-25 8:37 AM, Sakari Ailus wrote:
> Hi folks,
> 
> One patch turned into a set, the second patch being the original one.
> 
> since v3:
> 
> - Add a patch (first one) to switch to unsigned long type for polarity
>   field and renames it as gpio_flags.
> 
> - Use a polarity_low boolean field for indicating the GPIO polarity. This
>   is turned to gpio_flags in int3472_get_con_id_and_polarity().
> 
> - Put the new polarity_low bool field next to the u8's for better struct
>   packing.
> 
> - Add a patch (last one) to rename "func" as "con_id" which is used
>   throughout the GPIO framework.

Thanks the whole series looks good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

for the series.

Regards,

Hans


p.s.

Did you see my remarks about rewriting the INT3472 code to have it
do all the power-sequencing itself in the "RFC: How to deal with the INT3472
handshake GPIO found on Intel IPU6 MTL?" thread ?

Re: [PATCH v4 2/3] platform/x86: int3472: Call "reset" GPIO "enable" for INT347E

[Andy Shevchenko]

On Fri, Jan 31, 2025 at 09:37:06AM +0200, Sakari Ailus wrote:
> The DT bindings for ov7251 specify "enable" GPIO (xshutdown in
> documentation) but the int3472 indiscriminately provides this as a "reset"
> GPIO to sensor drivers. Take this into account by assigning it as "enable"
> with active high polarity for INT347E devices, i.e. ov7251. "reset" with
> active low polarity remains the default GPIO name for other devices.

...

> +static void int3472_get_func_and_polarity(struct acpi_device *adev, u8 *type,
> +					  const char **func, unsigned long *gpio_flags)
>  {
> -	switch (type) {
> +	unsigned int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(int3472_gpio_map); i++) {

> +		if (*type != int3472_gpio_map[i].type_from ||
> +		    !acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
> +			continue;

I think in a split form it is easier to read and maintain:

		if (!acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
			continue;

		if (*type != int3472_gpio_map[i].type_from)
			continue;

> +		*type = int3472_gpio_map[i].type_to;

> +		*gpio_flags = int3472_gpio_map[i].polarity_low ?
> +			GPIO_ACTIVE_LOW : GPIO_ACTIVE_HIGH;

Still can be one line (100 characters). But in this case I have no strong
preference. Up to Hans.

> +		*func = int3472_gpio_map[i].func;
> +		return;
> +	}

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v4 0/3] int3472: Support GPIO con_id based on _HID

[Andy Shevchenko]

On Fri, Jan 31, 2025 at 09:37:04AM +0200, Sakari Ailus wrote:
> Hi folks,
> 
> One patch turned into a set, the second patch being the original one.
> 
> since v3:
> 
> - Add a patch (first one) to switch to unsigned long type for polarity
>   field and renames it as gpio_flags.
> 
> - Use a polarity_low boolean field for indicating the GPIO polarity. This
>   is turned to gpio_flags in int3472_get_con_id_and_polarity().
> 
> - Put the new polarity_low bool field next to the u8's for better struct
>   packing.
> 
> - Add a patch (last one) to rename "func" as "con_id" which is used
>   throughout the GPIO framework.

With a comment addressed in patch 2,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v4 2/3] platform/x86: int3472: Call "reset" GPIO "enable" for INT347E

[Sakari Ailus]

Hi Andy,

On Fri, Jan 31, 2025 at 01:22:19PM +0200, Andy Shevchenko wrote:
> On Fri, Jan 31, 2025 at 09:37:06AM +0200, Sakari Ailus wrote:
> > The DT bindings for ov7251 specify "enable" GPIO (xshutdown in
> > documentation) but the int3472 indiscriminately provides this as a "reset"
> > GPIO to sensor drivers. Take this into account by assigning it as "enable"
> > with active high polarity for INT347E devices, i.e. ov7251. "reset" with
> > active low polarity remains the default GPIO name for other devices.
> 
> ...
> 
> > +static void int3472_get_func_and_polarity(struct acpi_device *adev, u8 *type,
> > +					  const char **func, unsigned long *gpio_flags)
> >  {
> > -	switch (type) {
> > +	unsigned int i;
> > +
> > +	for (i = 0; i < ARRAY_SIZE(int3472_gpio_map); i++) {
> 
> > +		if (*type != int3472_gpio_map[i].type_from ||
> > +		    !acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
> > +			continue;
> 
> I think in a split form it is easier to read and maintain:
> 
> 		if (!acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
> 			continue;
> 
> 		if (*type != int3472_gpio_map[i].type_from)
> 			continue;

Works for me, with the order reverted. I'll send v5.

> 
> > +		*type = int3472_gpio_map[i].type_to;
> 
> > +		*gpio_flags = int3472_gpio_map[i].polarity_low ?
> > +			GPIO_ACTIVE_LOW : GPIO_ACTIVE_HIGH;
> 
> Still can be one line (100 characters). But in this case I have no strong
> preference. Up to Hans.
> 
> > +		*func = int3472_gpio_map[i].func;
> > +		return;
> > +	}
> 

-- 
Regards,

Sakari Ailus

Re: [PATCH v4 2/3] platform/x86: int3472: Call "reset" GPIO "enable" for INT347E

[Andy Shevchenko]

On Fri, Jan 31, 2025 at 11:57:20AM +0000, Sakari Ailus wrote:
> On Fri, Jan 31, 2025 at 01:22:19PM +0200, Andy Shevchenko wrote:
> > On Fri, Jan 31, 2025 at 09:37:06AM +0200, Sakari Ailus wrote:

...

> > > +		if (*type != int3472_gpio_map[i].type_from ||
> > > +		    !acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
> > > +			continue;
> > 
> > I think in a split form it is easier to read and maintain:
> > 
> > 		if (!acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
> > 			continue;
> > 
> > 		if (*type != int3472_gpio_map[i].type_from)
> > 			continue;
> 
> Works for me, with the order reverted. I'll send v5.

Hmm... I don't think the provided order is understandable.
But let's continue discussion in v5 thread.

-- 
With Best Regards,
Andy Shevchenko