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gpio: OF: separation of concerns

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The generic GPIO library directly implement code for of_find_gpio()
which is only used with CONFIG_OF and causes compilation problems
on archs that do not even have stubs for OF functions, especially
on UM that does not implement any IO remap functions.

Move the function to gpiolib-of.c, implement a static inline stub
in gpiolib.h returning PTR_ERR(-ENOENT) if CONFIG_OF_GPIO is not
set and be done with it.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij
2016-10-03 10:09:40 +02:00
parent 3085a4a459
commit ea713bc450
3 changed files with 55 additions and 39 deletions
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16
drivers/gpio/gpiolib.h
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@@ -20,6 +20,7 @@
enum of_gpio_flags;
enum gpiod_flags;
enum gpio_lookup_flags;
struct acpi_device;
/**
@@ -86,6 +87,21 @@ struct acpi_gpio_info {
/* gpio suffixes used for ACPI and device tree lookup */
static const char * const gpio_suffixes[] = { "gpios", "gpio" };
#ifdef CONFIG_OF_GPIO
struct gpio_desc *of_find_gpio(struct device *dev,
const char *con_id,
unsigned int idx,
enum gpio_lookup_flags *flags);
#else
static inline struct gpio_desc *of_find_gpio(struct device *dev,
const char *con_id,
unsigned int idx,
enum gpio_lookup_flags *flags)
{
return ERR_PTR(-ENOENT);
}
#endif /* CONFIG_OF_GPIO */
#ifdef CONFIG_ACPI
void acpi_gpiochip_add(struct gpio_chip *chip);
void acpi_gpiochip_remove(struct gpio_chip *chip);