diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 22 |
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, ®_val, off); + ret = regmap_read(chip->regmap, inreg, ®_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) |