Droid 4 has a GPIO line that we can use with CONFIG_POWER_RESET_GPIO.
It is probably connected to the CPCAP PMIC, and seems to power down
the whole device taking power consumption to zero based on what
I measured.
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: Marcel Partap <mpartap@xxxxxxx>
Cc: Michael Scott <michael.scott@xxxxxxxxxx>
Cc: Sebastian Reichel <sre@xxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/boot/dts/omap4-droid4-xt894.dts | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm/boot/dts/omap4-droid4-xt894.dts b/arch/arm/boot/dts/omap4-droid4-xt894.dts
--- a/arch/arm/boot/dts/omap4-droid4-xt894.dts
+++ b/arch/arm/boot/dts/omap4-droid4-xt894.dts
@@ -27,6 +27,14 @@
reg = <0x80000000 0x3fd00000>; /* 1021 MB */
};
+ /* Poweroff GPIO probably connected to CPCAP */
+ gpio-poweroff {
+ compatible = "gpio-poweroff";
+ pinctrl-0 = <&poweroff_gpio>;
+ pinctrl-names = "default";
+ gpios = <&gpio2 18 GPIO_ACTIVE_LOW>; /* gpio50 */
+ };
+
/* This is probably coming straight from the battery.. */
wl12xx_vmmc: regulator-wl12xx {
compatible = "regulator-fixed";
@@ -226,6 +234,14 @@
};
&omap4_pmx_core {
+
+ /* gpmc_ncs0.gpio_50 */
+ poweroff_gpio: pinmux_poweroff_pins {
+ pinctrl-single,pins = <
+ OMAP4_IOPAD(0x074, PIN_OUTPUT_PULLUP | MUX_MODE3)
+ >;
+ };
+
usb_gpio_mux_sel1: pinmux_usb_gpio_mux_sel1_pins {
/* gpio_60 */
pinctrl-single,pins = <
--
2.11.1
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