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authorMarek Vasut <marek.vasut@gmail.com>2018-12-12 02:40:01 +0100
committerLinus Walleij <linus.walleij@linaro.org>2018-12-14 15:19:23 +0100
commit87813cf30a89012d77012347284ad7dd71c7b0b9 (patch)
tree441edb8f62dc06fcb1863e53439bb4b700eff959 /drivers/gpio/gpio-pca953x.c
parentgpio: pca953x: Zap ad-hoc reg_output cache (diff)
downloadlinux-87813cf30a89012d77012347284ad7dd71c7b0b9.tar.xz
linux-87813cf30a89012d77012347284ad7dd71c7b0b9.zip
gpio: pca953x: Zap single use of pca953x_read_single()
Drop pca953x_write_single() which is used in one place. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-pca953x.c')
-rw-r--r--drivers/gpio/gpio-pca953x.c22
1 files changed, 5 insertions, 17 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index ede20b3f2f20..48a16a3e8ce9 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -324,21 +324,6 @@ static u8 pca953x_recalc_addr(struct pca953x_chip *chip, int reg, int off,
return regaddr;
}
-static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val,
- int off)
-{
- u8 regaddr = pca953x_recalc_addr(chip, reg, off, false, false);
- int ret;
-
- ret = regmap_read(chip->regmap, regaddr, val);
- if (ret < 0) {
- dev_err(&chip->client->dev, "failed reading register\n");
- return ret;
- }
-
- return 0;
-}
-
static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
{
u8 regaddr = pca953x_recalc_addr(chip, reg, 0, true, true);
@@ -408,11 +393,14 @@ exit:
static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
+ u8 inreg = pca953x_recalc_addr(chip, chip->regs->input, off,
+ true, false);
+ u8 bit = BIT(off % BANK_SZ);
u32 reg_val;
int ret;
mutex_lock(&chip->i2c_lock);
- ret = pca953x_read_single(chip, chip->regs->input, &reg_val, off);
+ ret = regmap_read(chip->regmap, inreg, &reg_val);
mutex_unlock(&chip->i2c_lock);
if (ret < 0) {
/* NOTE: diagnostic already emitted; that's all we should
@@ -422,7 +410,7 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
return 0;
}
- return (reg_val & (1u << (off % BANK_SZ))) ? 1 : 0;
+ return !!(reg_val & bit);
}
static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)