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| author |   Himanshu Bhavani <himanshu.bhavani@siliconsignals.io> | 2025-05-05 11:28:27 +0530 |
|---|---|---|
| committer |   Shawn Guo <shawnguo@kernel.org> | 2025-05-09 22:48:35 +0800 |
| commit | c6888983134e2ccc2db8ffd2720b0d4826d952e4 (patch) | |
| tree | 02ed522b0b92502ef29af39f38b0604e872fd970 | |
| parent | arm64: dts: imx8mp: use 800MHz NoC OPP for nominal drive mode (diff) | |
| download | wireguard-linux-c6888983134e2ccc2db8ffd2720b0d4826d952e4.tar.xz wireguard-linux-c6888983134e2ccc2db8ffd2720b0d4826d952e4.zip | |
arm64: dts: imx8mp-var-som: Fix LDO5 shutdown causing SD card timeout
Fix SD card timeout issue caused by LDO5 regulator getting disabled
after boot.
The kernel log shows LDO5 being disabled, which leads to a timeout
on USDHC2:
[ 33.760561] LDO5: disabling
[ 81.119861] mmc1: Timeout waiting for hardware interrupt.
To prevent this, set regulator-boot-on and regulator-always-on for
LDO5. Also add the vqmmc regulator to properly support 1.8V/3.3V
signaling for USDHC2 using a GPIO-controlled regulator.
Fixes: 6c2a1f4f71258 ("arm64: dts: imx8mp-var-som-symphony: Add Variscite Symphony board and VAR-SOM-MX8MP SoM")
Signed-off-by: Himanshu Bhavani <himanshu.bhavani@siliconsignals.io>
Acked-by: Tarang Raval <tarang.raval@siliconsignals.io>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/boot/dts/freescale/imx8mp-var-som.dtsi | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-var-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-var-som.dtsi index b2ac2583a592..b59da91fdd04 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp-var-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mp-var-som.dtsi @@ -35,7 +35,6 @@ <0x1 0x00000000 0 0xc0000000>; }; - reg_usdhc2_vmmc: regulator-usdhc2-vmmc { compatible = "regulator-fixed"; regulator-name = "VSD_3V3"; @@ -46,6 +45,16 @@ startup-delay-us = <100>; off-on-delay-us = <12000>; }; + + reg_usdhc2_vqmmc: regulator-usdhc2-vqmmc { + compatible = "regulator-gpio"; + regulator-name = "VSD_VSEL"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <3300000>; + gpios = <&gpio2 12 GPIO_ACTIVE_HIGH>; + states = <3300000 0x0 1800000 0x1>; + vin-supply = <&ldo5>; + }; }; &A53_0 { @@ -205,6 +214,7 @@ pinctrl-2 = <&pinctrl_usdhc2_200mhz>, <&pinctrl_usdhc2_gpio>; cd-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>; vmmc-supply = <®_usdhc2_vmmc>; + vqmmc-supply = <®_usdhc2_vqmmc>; bus-width = <4>; status = "okay"; }; |