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@kemnade.info>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20241010122957.85164-4-andreas@kemnade.info
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

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 7684868a2eed762e2ce000ae3b4d22a44a27db90..983a21d95db316c87154dfd3f040c14e5933d912 100644 (file)
--- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
+++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
@@ -115,6 +115,73 @@
        };
 };
 
+&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";
+       };
+
+       /*
+        * Name taken from vendor kernel but no evidence of actual usage found
+        * nor what it really controls.
+        */
+       panel-power-en-hog {
+               gpio-hog;
+               gpios = <14 GPIO_ACTIVE_HIGH>;
+               output-low;
+               line-name = "panel_power_en";
+       };
+
+       /*
+        * These two are exported to sysfs in vendor kernel, usage unknown,
+        * backlight state seems unrelated to these.
+        */
+       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 +473,22 @@
                >;
        };
 
+       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 +610,15 @@
        };
 };
 
+&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>;