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gpiolib: Extract gpiod_not_found() helper

Browse source 
Several places in the code are using same idiom, i.e.
	IS_ERR(desc) && PTR_ERR(desc) == -ENOENT
which meaning is GPIO description is not found.

For better readability extract gpiod_not_found() helper and use it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Andy Shevchenko 2020-10-21 17:25:28 +03:00 committed by Bartosz Golaszewski
parent 3650b228f8
commit 7b58696d9a
4 changed files with 16 additions and 18 deletions
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8
drivers/gpio/gpiolib-devres.c
View file

@ -246,10 +246,8 @@ struct gpio_desc *__must_check devm_gpiod_get_index_optional(struct device *dev,
struct gpio_desc *desc;
desc = devm_gpiod_get_index(dev, con_id, index, flags);
if (IS_ERR(desc)) {
if (PTR_ERR(desc) == -ENOENT)
return NULL;
}
if (gpiod_not_found(desc))
return NULL;
return desc;
}
@ -308,7 +306,7 @@ devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
struct gpio_descs *descs;
descs = devm_gpiod_get_array(dev, con_id, flags);
if (PTR_ERR(descs) == -ENOENT)
if (gpiod_not_found(descs))
return NULL;
return descs;

12
drivers/gpio/gpiolib-of.c
View file

@ -509,31 +509,31 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
desc = of_get_named_gpiod_flags(dev->of_node, prop_name, idx,
&of_flags);
if (!IS_ERR(desc) || PTR_ERR(desc) != -ENOENT)
if (!gpiod_not_found(desc))
break;
}
if (PTR_ERR(desc) == -ENOENT) {
if (gpiod_not_found(desc)) {
/* Special handling for SPI GPIOs if used */
desc = of_find_spi_gpio(dev, con_id, &of_flags);
}
if (PTR_ERR(desc) == -ENOENT) {
if (gpiod_not_found(desc)) {
/* This quirk looks up flags and all */
desc = of_find_spi_cs_gpio(dev, con_id, idx, flags);
if (!IS_ERR(desc))
return desc;
}
if (PTR_ERR(desc) == -ENOENT) {
if (gpiod_not_found(desc)) {
/* Special handling for regulator GPIOs if used */
desc = of_find_regulator_gpio(dev, con_id, &of_flags);
}
if (PTR_ERR(desc) == -ENOENT)
if (gpiod_not_found(desc))
desc = of_find_arizona_gpio(dev, con_id, &of_flags);
if (PTR_ERR(desc) == -ENOENT)
if (gpiod_not_found(desc))
desc = of_find_usb_gpio(dev, con_id, &of_flags);
if (IS_ERR(desc))

12
drivers/gpio/gpiolib.c
View file

@ -3767,7 +3767,7 @@ struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode,
desc = fwnode_get_named_gpiod(fwnode, prop_name, index, flags,
label);
if (!IS_ERR(desc) || (PTR_ERR(desc) != -ENOENT))
if (!gpiod_not_found(desc))
break;
}
@ -3943,7 +3943,7 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
* Either we are not using DT or ACPI, or their lookup did not return
* a result. In that case, use platform lookup as a fallback.
*/
if (!desc || desc == ERR_PTR(-ENOENT)) {
if (!desc || gpiod_not_found(desc)) {
dev_dbg(dev, "using lookup tables for GPIO lookup\n");
desc = gpiod_find(dev, con_id, idx, &lookupflags);
}
@ -4078,10 +4078,8 @@ struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
struct gpio_desc *desc;
desc = gpiod_get_index(dev, con_id, index, flags);
if (IS_ERR(desc)) {
if (PTR_ERR(desc) == -ENOENT)
return NULL;
}
if (gpiod_not_found(desc))
return NULL;
return desc;
}
@ -4283,7 +4281,7 @@ struct gpio_descs *__must_check gpiod_get_array_optional(struct device *dev,
struct gpio_descs *descs;
descs = gpiod_get_array(dev, con_id, flags);
if (PTR_ERR(descs) == -ENOENT)
if (gpiod_not_found(descs))
return NULL;
return descs;

2
drivers/gpio/gpiolib.h
View file

@ -130,6 +130,8 @@ struct gpio_desc {
#endif
};
#define gpiod_not_found(desc) (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT)
int gpiod_request(struct gpio_desc *desc, const char *label);
void gpiod_free(struct gpio_desc *desc);
int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,