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@xxxxxxxxxxxx>
---
.../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
