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Subject[PATCH v1 03/12] arm64: dts: librem5-devkit: allow modem to wake the system from suspend
Date
From: "Angus Ainslie (Purism)" <angus@akkea.ca>

Connect the WoWWAN signal to a gpio key to wake up the system from suspend.

Signed-off-by: Angus Ainslie (Purism) <angus@akkea.ca>
---
.../dts/freescale/imx8mq-librem5-devkit.dts | 27 +++++++++++++++----
1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
index 8162576e8f3d..ac6ba227e1da 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
@@ -33,7 +33,7 @@
gpio-keys {
compatible = "gpio-keys";
pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_gpio_keys>;
+ pinctrl-0 = <&pinctrl_gpio_keys>, <&pinctrl_wwan_in>;

btn1 {
label = "VOL_UP";
@@ -55,6 +55,15 @@
wakeup-source;
linux,code = <KEY_HP>;
};
+
+ wwan_wake {
+ label = "WWAN_WAKE";
+ gpios = <&gpio3 8 GPIO_ACTIVE_LOW>;
+ interrupt-parent = <&gpio3>;
+ interrupts = <8 GPIO_ACTIVE_LOW>;
+ wakeup-source;
+ linux,code = <KEY_PHONE>;
+ };
};

leds {
@@ -767,11 +776,19 @@
>;
};

- pinctrl_wwan: wwangrp {
+ pinctrl_wwan_in: wwaningrp {
+ fsl,pins = <
+ /* nWoWWAN */
+ MX8MQ_IOMUXC_NAND_DATA02_GPIO3_IO8 0x80
+ >;
+ };
+
+ pinctrl_wwan_out: wwanoutgrp {
fsl,pins = <
- MX8MQ_IOMUXC_NAND_CE3_B_GPIO3_IO4 0x09 /* nWWAN_DISABLE */
- MX8MQ_IOMUXC_NAND_DATA02_GPIO3_IO8 0x80 /* nWoWWAN */
- MX8MQ_IOMUXC_NAND_DATA03_GPIO3_IO9 0x19 /* WWAN_RESET */
+ /* nWWAN_DISABLE */
+ MX8MQ_IOMUXC_NAND_CE3_B_GPIO3_IO4 0x09
+ /* WWAN_RESET */
+ MX8MQ_IOMUXC_NAND_DATA03_GPIO3_IO9 0x19
>;
};
};
--
2.20.1
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