linux-kernel - [PATCH 3/4] ARM: dts: omap: omap4-epson-embt2ws: add unknown gpio outputs

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Message-Id: <20240930213008.159647-4-andreas@kemnade.info>
Date: Mon, 30 Sep 2024 23:30:07 +0200
From: Andreas Kemnade <andreas@...nade.info>
To: Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-kernel@...r.kernel.org,
	Rob Herring <robh@...nel.org>,
	khilman@...libre.com,
	devicetree@...r.kernel.org,
	tony@...mide.com,
	rogerq@...nel.org,
	aaro.koskinen@....fi,
	linux-omap@...r.kernel.org
Cc: Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH 3/4] ARM: dts: omap: omap4-epson-embt2ws: add unknown gpio outputs

Set them to the state seen in a running system, initialized
by vendor u-boot or kernel. Add line names where they are defined in the
vendor kernel.
gpio15 resets something in the display, otherwise meaning of the
gpios is not known.

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 .../boot/dts/ti/omap/omap4-epson-embt2ws.dts  | 84 +++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
index cc1b6080bf95..c8205ae89840 100644
--- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
+++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
@@ -115,6 +115,65 @@ wl12xx_vmmc: wl12xx-vmmc {
 	};
 };
 
+&gpio1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&gpio1_hog_pins &gpio1wk_hog_pins>;
+
+	lb-reset-hog {
+		gpio-hog;
+		gpios = <9 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "lb_reset";
+	};
+
+	power-en-hog {
+		gpio-hog;
+		gpios = <10 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "power_en";
+	};
+
+	panel-power-en-hog {
+		gpio-hog;
+		gpios = <14 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "panel_power_en";
+	};
+
+	blc-r-hog {
+		gpio-hog;
+		gpios = <17 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "blc_r";
+	};
+
+	blc-l-hog {
+		gpio-hog;
+		gpios = <16 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "blc_l";
+	};
+
+	high-hog {
+		gpio-hog;
+		gpios = <15 GPIO_ACTIVE_HIGH /* maybe dsi to dpi chip reset? */
+			 21 GPIO_ACTIVE_HIGH
+			 26 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "unknown-high";
+	};
+
+	low-hog {
+		gpio-hog;
+		gpios = <18 GPIO_ACTIVE_HIGH
+			 19 GPIO_ACTIVE_HIGH
+			 20 GPIO_ACTIVE_HIGH
+			 22 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "unknown-low";
+	};
+};
+
 &i2c1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c1_pins>;
@@ -406,6 +465,22 @@ OMAP4_IOPAD(0x56, PIN_INPUT_PULLUP | MUX_MODE3) /* gpio35 */
 		>;
 	};
 
+	gpio1_hog_pins: pinmux-gpio1-hog-pins {
+		pinctrl-single,pins = <
+			OMAP4_IOPAD(0x1b4, PIN_OUTPUT | MUX_MODE3) /* gpio14 */
+			OMAP4_IOPAD(0x1b8, PIN_OUTPUT | MUX_MODE3) /* gpio16 */
+			OMAP4_IOPAD(0x1ba, PIN_OUTPUT | MUX_MODE3) /* gpio17 */
+
+			OMAP4_IOPAD(0x1b6, PIN_OUTPUT | MUX_MODE3) /* gpio15 */
+			OMAP4_IOPAD(0x1bc, PIN_OUTPUT | MUX_MODE3) /* gpio18 */
+			OMAP4_IOPAD(0x1be, PIN_OUTPUT | MUX_MODE3) /* gpio19 */
+			OMAP4_IOPAD(0x1c0, PIN_OUTPUT | MUX_MODE3) /* gpio20 */
+			OMAP4_IOPAD(0x1c2, PIN_OUTPUT | MUX_MODE3) /* gpio21 */
+			OMAP4_IOPAD(0x1c4, PIN_OUTPUT | MUX_MODE3) /* gpio22 */
+			OMAP4_IOPAD(0x1cc, PIN_OUTPUT | MUX_MODE3) /* gpio26 */
+		>;
+	};
+
 	i2c1_pins: pinmux-i2c1-pins {
 		pinctrl-single,pins = <
 			   OMAP4_IOPAD(0x122, PIN_INPUT_PULLUP | MUX_MODE0)	/* i2c1_scl */
@@ -527,6 +602,15 @@ OMAP4_IOPAD(0x1c8, PIN_OUTPUT | MUX_MODE3)  /* gpio_24 / WLAN_EN */
 	};
 };
 
+&omap4_pmx_wkup {
+	gpio1wk_hog_pins: pinmux-gpio1wk-hog-pins {
+		pinctrl-single,pins = <
+			OMAP4_IOPAD(0x68, PIN_INPUT_PULLDOWN | MUX_MODE3) /* gpio9 */
+			OMAP4_IOPAD(0x6a, PIN_INPUT | MUX_MODE3) /* gpio10 */
+		>;
+	};
+};
+
 &uart2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart2_pins &bt_pins>;
-- 
2.39.5