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gpio: pca953x: Factor out common code from device_pca95xx_init() 

The PCA957x and PCA953x init functions are almost the same, except for
the different register mapping and one extra write to BKEN register in
case of PCA957x. Factor out the common code.

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 02:39:55 +01:00 committed by Linus Walleij
parent 90adb09799
commit 7a04aaa32c
1 changed files with 12 additions and 23 deletions
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35
drivers/gpio/gpio-pca953x.c
View File

@ -119,18 +119,21 @@ struct pca953x_reg_config {
int direction;
int output;
int input;
int invert;
};
static const struct pca953x_reg_config pca953x_regs = {
.direction = PCA953X_DIRECTION,
.output = PCA953X_OUTPUT,
.input = PCA953X_INPUT,
.invert = PCA953X_INVERT,
};
static const struct pca953x_reg_config pca957x_regs = {
.direction = PCA957X_CFG,
.output = PCA957X_OUT,
.input = PCA957X_IN,
.invert = PCA957X_INVRT,
};
struct pca953x_chip {
@ -679,13 +682,11 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
}
#endif
static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
static int device_pca95xx_init(struct pca953x_chip *chip, u32 invert)
{
int ret;
u8 val[MAX_BANK];
chip->regs = &pca953x_regs;
ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
if (ret)
goto out;
@ -701,7 +702,7 @@ static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
else
memset(val, 0, NBANK(chip));
ret = pca953x_write_regs(chip, PCA953X_INVERT, val);
ret = pca953x_write_regs(chip, chip->regs->invert, val);
out:
return ret;
}
@ -711,22 +712,7 @@ static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
int ret;
u8 val[MAX_BANK];
chip->regs = &pca957x_regs;
ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
if (ret)
goto out;
ret = pca953x_read_regs(chip, chip->regs->direction,
chip->reg_direction);
if (ret)
goto out;
/* set platform specific polarity inversion */
if (invert)
memset(val, 0xFF, NBANK(chip));
else
memset(val, 0, NBANK(chip));
ret = pca953x_write_regs(chip, PCA957X_INVRT, val);
ret = device_pca95xx_init(chip, invert);
if (ret)
goto out;
@ -842,10 +828,13 @@ static int pca953x_probe(struct i2c_client *client,
*/
pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
ret = device_pca953x_init(chip, invert);
else
if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
chip->regs = &pca953x_regs;
ret = device_pca95xx_init(chip, invert);
} else {
chip->regs = &pca957x_regs;
ret = device_pca957x_init(chip, invert);
}
if (ret)
goto err_exit;