gpio: pca953x: use value returning setters

struct gpio_chip now has additional variants of the set(_multiple)
driver callbacks that return an integer to indicate success or failure.
Convert the driver to using them.

Reviewed-by: Linus Walleij <[e-mail]>
Acked-by: Uwe Kleine-König <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bartosz Golaszewski <[e-mail]>

drivers/gpio/gpio-pca953x.c

···
 	return !!(reg_val & bit);
 }
 
-static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
+static int pca953x_gpio_set_value(struct gpio_chip *gc, unsigned int off,
+				  int val)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
 	u8 outreg = chip->recalc_addr(chip, chip->regs->output, off);
···
 
 	guard(mutex)(&chip->i2c_lock);
 
-	regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
+	return regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
 }
 
 static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
···
 	return 0;
 }
 
-static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
-				      unsigned long *mask, unsigned long *bits)
+static int pca953x_gpio_set_multiple(struct gpio_chip *gc,
+				     unsigned long *mask, unsigned long *bits)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
 	DECLARE_BITMAP(reg_val, MAX_LINE);
···
 
 	ret = pca953x_read_regs(chip, chip->regs->output, reg_val);
 	if (ret)
-		return;
+		return ret;
 
 	bitmap_replace(reg_val, reg_val, bits, mask, gc->ngpio);
 
-	pca953x_write_regs(chip, chip->regs->output, reg_val);
+	return pca953x_write_regs(chip, chip->regs->output, reg_val);
 }
 
 static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
···
 	gc->direction_input  = pca953x_gpio_direction_input;
 	gc->direction_output = pca953x_gpio_direction_output;
 	gc->get = pca953x_gpio_get_value;
-	gc->set = pca953x_gpio_set_value;
+	gc->set_rv = pca953x_gpio_set_value;
 	gc->get_direction = pca953x_gpio_get_direction;
 	gc->get_multiple = pca953x_gpio_get_multiple;
-	gc->set_multiple = pca953x_gpio_set_multiple;
+	gc->set_multiple_rv = pca953x_gpio_set_multiple;
 	gc->set_config = pca953x_gpio_set_config;
 	gc->can_sleep = true;