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authorLinus Walleij <linus.walleij@linaro.org>2016-09-19 10:08:56 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-09-19 10:08:56 +0200
commit14063d71e5e6775c676755612fc81deb029685c4 (patch)
tree9b31f7c8e1076dd775c05a94ceb3b66718bbd4c1 /drivers/gpio/gpio-tc3589x.c
parentgpio: f7188x: use gpiochip_get_data instead of container_of (diff)
downloadlinux-14063d71e5e6775c676755612fc81deb029685c4.tar.xz
linux-14063d71e5e6775c676755612fc81deb029685c4.zip
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>
Diffstat (limited to 'drivers/gpio/gpio-tc3589x.c')
-rw-r--r--drivers/gpio/gpio-tc3589x.c29
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index 5baa45768ec5..537a4335ddec 100644
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -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,
};