diff options
| author | Marek Vasut <marek.vasut@gmail.com> | 2018-12-12 02:39:54 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-12-14 15:19:00 +0100 |
| commit | 90adb0979947ab9ee2bd5fffa28c6812a47cd7f2 (patch) | |
| tree | e866106889ff79a9aae58677de4fc3fcf3b85a32 /drivers/gpio | |
| parent | 49e713738f9ebfe659d16bff3ff1fb0a054aa9f7 (diff) | |
| download | linux-90adb0979947ab9ee2bd5fffa28c6812a47cd7f2.tar.bz2 | |
gpio: pca953x: Unify pca953x_{read,write}_regs_{8,mul}()
At this point, the pca953x_{read,write}_regs_mul() can read single bank
PCA953x GPIO chips as well. Merge the _8 and _mul functions together to
simplify the code a bit.
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')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 54 |
1 files changed, 8 insertions, 46 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 551fa69661b2..09fd8cde9ca9 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -154,9 +154,6 @@ struct pca953x_chip { struct regulator *regulator; const struct pca953x_reg_config *regs; - - int (*write_regs)(struct pca953x_chip *, int, u8 *); - int (*read_regs)(struct pca953x_chip *, int, u8 *); }; static int pca953x_bank_shift(struct pca953x_chip *chip) @@ -201,17 +198,13 @@ static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val, return 0; } -static int pca953x_write_regs_8(struct pca953x_chip *chip, int reg, u8 *val) -{ - return i2c_smbus_write_byte_data(chip->client, reg, *val); -} - -static int pca953x_write_regs_mul(struct pca953x_chip *chip, int reg, u8 *val) +static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val) { int bank_shift = pca953x_bank_shift(chip); int addr = (reg & PCAL_GPIO_MASK) << bank_shift; int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1; u8 regaddr = pinctrl | addr; + int ret; /* Chips with 24 and more GPIOs always support Auto Increment */ if (NBANK(chip) > 2) @@ -221,15 +214,8 @@ static int pca953x_write_regs_mul(struct pca953x_chip *chip, int reg, u8 *val) if (PCA_CHIP_TYPE(chip->driver_data) == PCA957X_TYPE) regaddr |= REG_ADDR_AI; - return i2c_smbus_write_i2c_block_data(chip->client, regaddr, - NBANK(chip), val); -} - -static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val) -{ - int ret = 0; - - ret = chip->write_regs(chip, reg, val); + ret = i2c_smbus_write_i2c_block_data(chip->client, regaddr, + NBANK(chip), val); if (ret < 0) { dev_err(&chip->client->dev, "failed writing register\n"); return ret; @@ -238,36 +224,20 @@ static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val) return 0; } -static int pca953x_read_regs_8(struct pca953x_chip *chip, int reg, u8 *val) -{ - int ret; - - ret = i2c_smbus_read_byte_data(chip->client, reg); - *val = ret; - - return ret; -} - -static int pca953x_read_regs_mul(struct pca953x_chip *chip, int reg, u8 *val) +static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val) { int bank_shift = pca953x_bank_shift(chip); int addr = (reg & PCAL_GPIO_MASK) << bank_shift; int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1; u8 regaddr = pinctrl | addr; + int ret; /* Chips with 24 and more GPIOs always support Auto Increment */ if (NBANK(chip) > 2) regaddr |= REG_ADDR_AI; - return i2c_smbus_read_i2c_block_data(chip->client, regaddr, - NBANK(chip), val); -} - -static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val) -{ - int ret; - - ret = chip->read_regs(chip, reg, val); + ret = i2c_smbus_read_i2c_block_data(chip->client, regaddr, + NBANK(chip), val); if (ret < 0) { dev_err(&chip->client->dev, "failed reading register\n"); return ret; @@ -872,14 +842,6 @@ static int pca953x_probe(struct i2c_client *client, */ pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK); - if (chip->gpio_chip.ngpio <= 8) { - chip->write_regs = pca953x_write_regs_8; - chip->read_regs = pca953x_read_regs_8; - } else { - chip->write_regs = pca953x_write_regs_mul; - chip->read_regs = pca953x_read_regs_mul; - } - if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) ret = device_pca953x_init(chip, invert); else |