diff mbox series

[V3,07/14] gpio: pca953x: Factor out common code from device_pca95xx_init()

Message ID 20181215142605.15397-8-marek.vasut+renesas@gmail.com (mailing list archive)
State Accepted
Delegated to: Geert Uytterhoeven
Headers show
Series gpio: pca953x: Code cleanup and regmap conversion | expand

Commit Message

Marek Vasut Dec. 15, 2018, 2:25 p.m. UTC 
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: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
V2: No change
V3: No change
---
 drivers/gpio/gpio-pca953x.c | 35 ++++++++++++-----------------------
 1 file changed, 12 insertions(+), 23 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 626cbe040985..d4b8946ea710 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -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;