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authorAxel Lin <axel.lin@ingics.com>2016-02-29 14:08:19 +0100
committerLinus Walleij <linus.walleij@linaro.org>2016-03-09 03:17:55 +0100
commit3fab91ea284a3b795327dda915a3c150a49e4be2 (patch)
treeb14a447bd32e444aa848d364defcff8ec5bdf730 /drivers/gpio
parentgpio: timberdale: Switch to devm_ioremap_resource() (diff)
downloadlinux-3fab91ea284a3b795327dda915a3c150a49e4be2.tar.xz
linux-3fab91ea284a3b795327dda915a3c150a49e4be2.zip
gpio: lp3943: Drop pin_used and lp3943_gpio_request/lp3943_gpio_free
The implementation of lp3943_gpio_request/lp3943_gpio_free test pin_used for tracing the pin usage. However, gpiolib already checks FLAG_REQUESTED flag for the same purpose. So remove the redundant implementation. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-lp3943.c22
1 files changed, 0 insertions, 22 deletions
diff --git a/drivers/gpio/gpio-lp3943.c b/drivers/gpio/gpio-lp3943.c
index 6dc6725403ec..fdec94b0cfb0 100644
--- a/drivers/gpio/gpio-lp3943.c
+++ b/drivers/gpio/gpio-lp3943.c
@@ -45,26 +45,6 @@ struct lp3943_gpio {
u16 input_mask; /* 1 = GPIO is input direction, 0 = output */
};
-static int lp3943_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
- struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
- struct lp3943 *lp3943 = lp3943_gpio->lp3943;
-
- /* Return an error if the pin is already assigned */
- if (test_and_set_bit(offset, &lp3943->pin_used))
- return -EBUSY;
-
- return 0;
-}
-
-static void lp3943_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
- struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
- struct lp3943 *lp3943 = lp3943_gpio->lp3943;
-
- clear_bit(offset, &lp3943->pin_used);
-}
-
static int lp3943_gpio_set_mode(struct lp3943_gpio *lp3943_gpio, u8 offset,
u8 val)
{
@@ -177,8 +157,6 @@ static int lp3943_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
static const struct gpio_chip lp3943_gpio_chip = {
.label = "lp3943",
.owner = THIS_MODULE,
- .request = lp3943_gpio_request,
- .free = lp3943_gpio_free,
.direction_input = lp3943_gpio_direction_input,
.get = lp3943_gpio_get,
.direction_output = lp3943_gpio_direction_output,