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gpio: Add comments on #if/#else/#endif 

Improve readability a bit by commenting #if/#else/#endif statements
with the checked preprocessor symbols.

Signed-off-by: Enrico Weigelt <info@metux.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Enrico Weigelt 2019-06-17 18:45:05 +02:00 committed by Linus Walleij
parent a1000673d2
commit f310f2eff7
3 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
include/linux/gpio/driver.h
View File

@ -161,7 +161,7 @@ struct gpio_irq_chip {
*/ */
void (*irq_disable)(struct irq_data *data); void (*irq_disable)(struct irq_data *data);
}; };
#endif #endif /* CONFIG_GPIOLIB_IRQCHIP */
/** /**
* struct gpio_chip - abstract a GPIO controller * struct gpio_chip - abstract a GPIO controller
@ -301,7 +301,7 @@ struct gpio_chip {
spinlock_t bgpio_lock; spinlock_t bgpio_lock;
unsigned long bgpio_data; unsigned long bgpio_data;
unsigned long bgpio_dir; unsigned long bgpio_dir;
#endif #endif /* CONFIG_GPIO_GENERIC */
#ifdef CONFIG_GPIOLIB_IRQCHIP #ifdef CONFIG_GPIOLIB_IRQCHIP
/* /*
@ -316,7 +316,7 @@ struct gpio_chip {
* used to handle IRQs for most practical cases. * used to handle IRQs for most practical cases.
*/ */
struct gpio_irq_chip irq; struct gpio_irq_chip irq;
#endif #endif /* CONFIG_GPIOLIB_IRQCHIP */
/** /**
* @need_valid_mask: * @need_valid_mask:
@ -363,7 +363,7 @@ struct gpio_chip {
*/ */
int (*of_xlate)(struct gpio_chip *gc, int (*of_xlate)(struct gpio_chip *gc,
const struct of_phandle_args *gpiospec, u32 *flags); const struct of_phandle_args *gpiospec, u32 *flags);
#endif #endif /* CONFIG_OF_GPIO */
}; };
extern const char *gpiochip_is_requested(struct gpio_chip *chip, extern const char *gpiochip_is_requested(struct gpio_chip *chip,
@ -406,7 +406,7 @@ extern int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
}) })
#else #else
#define gpiochip_add_data(chip, data) gpiochip_add_data_with_key(chip, data, NULL, NULL) #define gpiochip_add_data(chip, data) gpiochip_add_data_with_key(chip, data, NULL, NULL)
#endif #endif /* CONFIG_LOCKDEP */
static inline int gpiochip_add(struct gpio_chip *chip) static inline int gpiochip_add(struct gpio_chip *chip)
{ {
@ -461,7 +461,7 @@ int bgpio_init(struct gpio_chip *gc, struct device *dev,
#define BGPIOF_READ_OUTPUT_REG_SET BIT(4) /* reg_set stores output value */ #define BGPIOF_READ_OUTPUT_REG_SET BIT(4) /* reg_set stores output value */
#define BGPIOF_NO_OUTPUT BIT(5) /* only input */ #define BGPIOF_NO_OUTPUT BIT(5) /* only input */
#endif #endif /* CONFIG_GPIO_GENERIC */
#ifdef CONFIG_GPIOLIB_IRQCHIP #ifdef CONFIG_GPIOLIB_IRQCHIP
@ -531,7 +531,7 @@ static inline int gpiochip_irqchip_add_nested(struct gpio_chip *gpiochip,
handler, type, true, handler, type, true,
&lock_key, &request_key); &lock_key, &request_key);
} }
#else #else /* ! CONFIG_LOCKDEP */
static inline int gpiochip_irqchip_add(struct gpio_chip *gpiochip, static inline int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
struct irq_chip *irqchip, struct irq_chip *irqchip,
unsigned int first_irq, unsigned int first_irq,
@ -582,7 +582,7 @@ int gpiochip_add_pingroup_range(struct gpio_chip *chip,
unsigned int gpio_offset, const char *pin_group); unsigned int gpio_offset, const char *pin_group);
void gpiochip_remove_pin_ranges(struct gpio_chip *chip); void gpiochip_remove_pin_ranges(struct gpio_chip *chip);
#else #else /* ! CONFIG_PINCTRL */
static inline int static inline int
gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name, gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,

2
include/linux/gpio/gpio-reg.h
View File

@ -11,4 +11,4 @@ struct gpio_chip *gpio_reg_init(struct device *dev, void __iomem *reg,
int gpio_reg_resume(struct gpio_chip *gc); int gpio_reg_resume(struct gpio_chip *gc);
#endif #endif /* GPIO_REG_H */

4
include/linux/gpio/machine.h
View File

@ -97,7 +97,7 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n); void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n);
void gpiod_remove_lookup_table(struct gpiod_lookup_table *table); void gpiod_remove_lookup_table(struct gpiod_lookup_table *table);
void gpiod_add_hogs(struct gpiod_hog *hogs); void gpiod_add_hogs(struct gpiod_hog *hogs);
#else #else /* ! CONFIG_GPIOLIB */
static inline static inline
void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {} void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {}
static inline static inline
@ -105,6 +105,6 @@ void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) {}
static inline static inline
void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {} void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {}
static inline void gpiod_add_hogs(struct gpiod_hog *hogs) {} static inline void gpiod_add_hogs(struct gpiod_hog *hogs) {}
#endif #endif /* CONFIG_GPIOLIB */
#endif /* __LINUX_GPIO_MACHINE_H */ #endif /* __LINUX_GPIO_MACHINE_H */