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