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gpio: pca953x: Deduplicate the bank_shift

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The bank_shift = fls(...) code was duplicated in the driver 5 times,
pull it into separate function.

Signed-off-by: Marek Vasut <[email protected]>
Cc: Bartosz Golaszewski <[email protected]>
Reviewed-by: Kieran Bingham <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
This commit is contained in:
Marek Vasut 2018-12-12 02:39:49 +01:00 • committed by Linus Walleij
commit 873d1e8e6f
1 changed files with 11 additions and 7 deletions
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18
drivers/gpio/gpio-pca953x.c
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@ -159,11 +159,16 @@ struct pca953x_chip {
int (*read_regs)(struct pca953x_chip *, int, u8 *);
};
static int pca953x_bank_shift(struct pca953x_chip *chip)
{
return fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
}
static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val,
int off)
{
int ret;
int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
int bank_shift = pca953x_bank_shift(chip);
int offset = off / BANK_SZ;
ret = i2c_smbus_read_byte_data(chip->client,
@ -182,7 +187,7 @@ static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val,
int off)
{
int ret;
int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
int bank_shift = pca953x_bank_shift(chip);
int offset = off / BANK_SZ;
ret = i2c_smbus_write_byte_data(chip->client,
@ -221,7 +226,7 @@ static int pca957x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
static int pca953x_write_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
{
int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
int bank_shift = pca953x_bank_shift(chip);
int addr = (reg & PCAL_GPIO_MASK) << bank_shift;
int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1;
@ -265,7 +270,7 @@ static int pca953x_read_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
static int pca953x_read_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
{
int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
int bank_shift = pca953x_bank_shift(chip);
int addr = (reg & PCAL_GPIO_MASK) << bank_shift;
int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1;
@ -402,13 +407,12 @@ static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
unsigned long *mask, unsigned long *bits)
{
struct pca953x_chip *chip = gpiochip_get_data(gc);
int bank_shift = pca953x_bank_shift(chip);
unsigned int bank_mask, bank_val;
int bank_shift, bank;
int bank;
u8 reg_val[MAX_BANK];
int ret;
bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
mutex_lock(&chip->i2c_lock);
memcpy(reg_val, chip->reg_output, NBANK(chip));
for (bank = 0; bank < NBANK(chip); bank++) {