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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>
This commit is contained in:
Marek Vasut 2018-12-12 02:40:01 +01:00 committed by Linus Walleij
parent ec82d1eba3
commit 87813cf30a
1 changed files with 5 additions and 17 deletions
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22
drivers/gpio/gpio-pca953x.c
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@ -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)