linux-kernel - [PATCH V2 1/2] gpiolib: of: Add polarity quirk for s5m8767

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Message-Id: <20250327004945.563765-1-peng.fan@oss.nxp.com>
Date: Thu, 27 Mar 2025 08:49:44 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: linus.walleij@...aro.org,
	brgl@...ev.pl,
	krzk@...nel.org,
	lgirdwood@...il.com,
	broonie@...nel.org,
	andriy.shevchenko@...el.com
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	Peng Fan <peng.fan@....com>
Subject: [PATCH V2 1/2] gpiolib: of: Add polarity quirk for s5m8767

From: Peng Fan <peng.fan@....com>

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 <peng.fan@....com>
---

V2:
 New patch

 drivers/gpio/gpiolib-of.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index eb667f8f1ead..83559dd24f32 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/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"
-- 
2.37.1