gpiolib: of: Add polarity quirk for s5m8767

This is prepare patch for switching s5m8767 regulator driver to
use GPIO descriptor. DTS for exynos5250 spring incorrectly specifies
"active low" polarity for the DVS and DS line. But per datasheet,
they are actually active high. So add polarity quirk for it.

Signed-off-by: Peng Fan <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: MrVan

drivers/gpio/gpiolib-of.c

@@ -222,6 +222,15 @@ static void of_gpio_try_fixup_polarity(const struct device_node *np,
 		 */
 		{ "lantiq,pci-xway",	"gpio-reset",	false },
 #endif
+#if IS_ENABLED(CONFIG_REGULATOR_S5M8767)
+		/*
+		 * According to S5M8767, the DVS and DS pin are
+		 * active-high signals. However, exynos5250-spring.dts use
+		 * active-low setting.
+		 */
+		{ "samsung,s5m8767-pmic", "s5m8767,pmic-buck-dvs-gpios", true },
+		{ "samsung,s5m8767-pmic", "s5m8767,pmic-buck-ds-gpios", true },
+#endif
 #if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2005)
 		/*
 		 * DTS for Nokia N900 incorrectly specified "active high"