From 77d043cac66965d48381cfec8f227799202a0a30 Mon Sep 17 00:00:00 2001 From: Marek Vasut <marex@denx.de> Date: Sat, 13 Nov 2021 03:29:44 +0100 Subject: [PATCH] ARM: dts: stm32: Auto-detect DHSOM with uSD level translator The uSD level translator on DHSOM and Avenger96 are optional, however it is possible to auto-detect it. This is done by setting SD CMD line high, and then testing whether signal level on CK line matches the signal level on CKIN line. If so, the uSD level translator is present, otherwise it is not populated. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Patrice Chotard <patrice.chotard@foss.st.com> Cc: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com> --- arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi | 4 ++++ arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi index 71b0486f02..5b2b09bcfb 100644 --- a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi +++ b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi @@ -216,6 +216,10 @@ &sdmmc1 { u-boot,dm-spl; + st,use-ckin; + st,cmd-gpios = <&gpiod 2 0>; + st,ck-gpios = <&gpioc 12 0>; + st,ckin-gpios = <&gpioe 4 0>; }; &sdmmc1_b4_pins_a { diff --git a/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi index 4b1dbf0838..c96eba99c5 100644 --- a/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi +++ b/arch/arm/dts/stm32mp15xx-dhcor-avenger96-u-boot.dtsi @@ -32,6 +32,10 @@ &sdmmc1 { u-boot,dm-spl; + st,use-ckin; + st,cmd-gpios = <&gpiod 2 0>; + st,ck-gpios = <&gpioc 12 0>; + st,ckin-gpios = <&gpioe 4 0>; }; &sdmmc1_b4_pins_a { -- 2.39.5