From: Martin Kepplinger <martin.kepplinger@xxxxxxx>
Unfortunately the codec can't be switched off on it's own. It would ground
the whole bus it's connected to (because of it's built-in diodes to VDD on
i2c pins), making all the other devices on the same bus inaccessible:
[ 0.237154] lm3692x 2-0036: Cannot read/clear faults: -11
[ 0.242628] lm3692x 2-0036: Fail writing initialization values
[ 0.286462] [drm:drm_bridge_attach] *ERROR* failed to attach bridge /soc@0/bus@30800000/mipi-dsi@30a00000 to encoder None-34: -517
Work around this hardware limitation by keeping audio-1v8 enabled.
Signed-off-by: Martin Kepplinger <martin.kepplinger@xxxxxxx>
---
arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
index 38732579d13e9..ab47bdc35cebd 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
@@ -91,6 +91,7 @@ reg_aud_1v8: regulator-audio-1v8 {
regulator-max-microvolt = <1800000>;
gpio = <&gpio1 4 GPIO_ACTIVE_HIGH>;
enable-active-high;
+ regulator-always-on;
};
reg_mic_2v4: regulator-mic-2v4 {
--
2.30.2
