From 82765d149583730c943a5d23d0bad3e647364dc1 Mon Sep 17 00:00:00 2001 From: Ahmad Fatoum Date: Wed, 21 Oct 2020 12:28:55 +0200 Subject: [PATCH] dt-bindings: arm: stm32: add simple-mfd compatible for tamp node The stm32mp1 TAMP (Tamper and backup registers) does tamper detection and features 32 backup registers that, being in the RTC domain, may survive even with Vdd switched off. This makes it suitable for use to communicate a reboot mode from OS to bootloader via the syscon-reboot-mode binding. Add a "simple-mfd" to support probing such a child node. The actual reboot mode node could then be defined in a board.dts or fixed up by the bootloader. Signed-off-by: Ahmad Fatoum Reviewed-by: Rob Herring Signed-off-by: Alexandre Torgue --- .../devicetree/bindings/arm/stm32/st,stm32-syscon.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml b/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml index 6f1cd0103c74..4684017a42e4 100644 --- a/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml +++ b/Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml @@ -20,6 +20,10 @@ properties: - st,stm32-syscfg - st,stm32-power-config - const: syscon + - items: + - const: st,stm32-tamp + - const: syscon + - const: simple-mfd reg: maxItems: 1 -- 2.50.1