[PATCH v2 3/4] ARM: dts: omap: omap4-epson-embt2ws: add unknown gpio outputs
From: Andreas Kemnade <andreas@kemnade.info>
Date: 2024-10-10 12:30:06
Also in:
linux-omap, lkml
Subsystem:
omap device tree support, the rest · Maintainers:
Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
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> --- .../boot/dts/ti/omap/omap4-epson-embt2ws.dts | 92 +++++++++++++++++++ 1 file changed, 92 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 7684868a2eed..983a21d95db3 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 +115,73 @@ 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"; + }; + + /* + * 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 @@ 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 +610,15 @@ 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