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authorMarek Vasut <marek.vasut@gmail.com>2018-12-12 04:39:54 +0300
committerLinus Walleij <linus.walleij@linaro.org>2018-12-14 17:19:00 +0300
commit90adb0979947ab9ee2bd5fffa28c6812a47cd7f2 (patch)
treee866106889ff79a9aae58677de4fc3fcf3b85a32 /drivers/gpio/gpio-pca953x.c
parent49e713738f9ebfe659d16bff3ff1fb0a054aa9f7 (diff)
downloadlinux-90adb0979947ab9ee2bd5fffa28c6812a47cd7f2.tar.xz
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/gpio-pca953x.c')
-rw-r--r--drivers/gpio/gpio-pca953x.c54
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