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gpiolib: rename pin range arguments

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To be crystal clear on what the arguments mean in this
funtion dealing with both GPIO and PIN ranges with confusing
naming, we now have gpio_offset and pin_offset and we are
on the clear that these are offsets into the specific GPIO
and pin controller respectively. The GPIO chip itself will
of course keep track of the base offset into the global
GPIO number space.

Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2012-11-21 08:48:09 +01:00
parent 2e8b2eab94
commit 316511c013
3 changed files with 13 additions and 12 deletions
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19
drivers/gpio/gpiolib.c
View File

@ -1191,13 +1191,13 @@ EXPORT_SYMBOL_GPL(gpiochip_find);
* gpiochip_add_pin_range() - add a range for GPIO <-> pin mapping
* @chip: the gpiochip to add the range for
* @pinctrl_name: the dev_name() of the pin controller to map to
* @offset: the start offset in the current gpio_chip number space
* @pin_base: the start offset in the pin controller number space
* @gpio_offset: the start offset in the current gpio_chip number space
* @pin_offset: the start offset in the pin controller number space
* @npins: the number of pins from the offset of each pin space (GPIO and
* pin controller) to accumulate in this range
*/
int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
unsigned int offset, unsigned int pin_base,
unsigned int gpio_offset, unsigned int pin_offset,
unsigned int npins)
{
struct gpio_pin_range *pin_range;
@ -1210,11 +1210,11 @@ int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
}
/* Use local offset as range ID */
pin_range->range.id = offset;
pin_range->range.id = gpio_offset;
pin_range->range.gc = chip;
pin_range->range.name = chip->label;
pin_range->range.base = chip->base + offset;
pin_range->range.pin_base = pin_base;
pin_range->range.base = chip->base + gpio_offset;
pin_range->range.pin_base = pin_offset;
pin_range->range.npins = npins;
pin_range->pctldev = pinctrl_find_and_add_gpio_range(pinctl_name,
&pin_range->range);
@ -1224,9 +1224,10 @@ int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
kfree(pin_range);
return PTR_ERR(pin_range->pctldev);
}
pr_debug("%s: GPIO chip: created GPIO range %d->%d ==> PIN %d->%d\n",
chip->label, offset, offset + npins - 1,
pin_base, pin_base + npins - 1);
pr_debug("GPIO chip %s: created GPIO range %d->%d ==> %s PIN %d->%d\n",
chip->label, gpio_offset, gpio_offset + npins - 1,
pinctl_name,
pin_offset, pin_offset + npins - 1);
list_add_tail(&pin_range->node, &chip->pin_ranges);

4
include/asm-generic/gpio.h
View File

@ -283,7 +283,7 @@ struct gpio_pin_range {
};
int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
unsigned int offset, unsigned int pin_base,
unsigned int gpio_offset, unsigned int pin_offset,
unsigned int npins);
void gpiochip_remove_pin_ranges(struct gpio_chip *chip);
@ -291,7 +291,7 @@ void gpiochip_remove_pin_ranges(struct gpio_chip *chip);
static inline int
gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
unsigned int offset, unsigned int pin_base,
unsigned int gpio_offset, unsigned int pin_offset,
unsigned int npins)
{
return 0;

2
include/linux/gpio.h
View File

@ -233,7 +233,7 @@ static inline int irq_to_gpio(unsigned irq)
static inline int
gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
unsigned int offset, unsigned int pin_base,
unsigned int gpio_offset, unsigned int pin_offset,
unsigned int npins)
{
WARN_ON(1);