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gpio: tc3589x: add .get_direction() and small cleanup 

This adds a .get_direction() callback to the TC3589x and
renames the function for setting single-ended mode to be
more to the point.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Linus Walleij 2016-09-19 10:08:56 +02:00
parent 35a26144a1
commit 14063d71e5
1 changed files with 23 additions and 6 deletions
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29
drivers/gpio/gpio-tc3589x.c
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@ -84,9 +84,25 @@ static int tc3589x_gpio_direction_input(struct gpio_chip *chip,
return tc3589x_set_bits(tc3589x, reg, BIT(pos), 0);
}
static int tc3589x_gpio_single_ended(struct gpio_chip *chip,
unsigned offset,
enum single_ended_mode mode)
static int tc3589x_gpio_get_direction(struct gpio_chip *chip,
unsigned offset)
{
struct tc3589x_gpio *tc3589x_gpio = gpiochip_get_data(chip);
struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
u8 reg = TC3589x_GPIODIR0 + offset / 8;
unsigned pos = offset % 8;
int ret;
ret = tc3589x_reg_read(tc3589x, reg);
if (ret < 0)
return ret;
return !!(ret & BIT(pos));
}
static int tc3589x_gpio_set_single_ended(struct gpio_chip *chip,
unsigned offset,
enum single_ended_mode mode)
{
struct tc3589x_gpio *tc3589x_gpio = gpiochip_get_data(chip);
struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
@ -127,11 +143,12 @@ static int tc3589x_gpio_single_ended(struct gpio_chip *chip,
static const struct gpio_chip template_chip = {
.label = "tc3589x",
.owner = THIS_MODULE,
.direction_input = tc3589x_gpio_direction_input,
.get = tc3589x_gpio_get,
.direction_output = tc3589x_gpio_direction_output,
.set = tc3589x_gpio_set,
.set_single_ended = tc3589x_gpio_single_ended,
.direction_output = tc3589x_gpio_direction_output,
.direction_input = tc3589x_gpio_direction_input,
.get_direction = tc3589x_gpio_get_direction,
.set_single_ended = tc3589x_gpio_set_single_ended,
.can_sleep = true,
};