diff options
| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2020-10-21 12:28:55 +0200 |
|---|---|---|
| committer | Alexandre Torgue <alexandre.torgue@foss.st.com> | 2020-11-26 14:42:41 +0100 |
| commit | 82765d149583730c943a5d23d0bad3e647364dc1 (patch) | |
| tree | 8e0e3de36f8232a470e370cf71a347dccd4f0760 /Documentation/devicetree/bindings/arm/stm32 | |
| parent | 4c903a946404dd96c45947c619c42d03020f9097 (diff) | |
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 <a.fatoum@pengutronix.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/stm32')
| -rw-r--r-- | Documentation/devicetree/bindings/arm/stm32/st,stm32-syscon.yaml | 4 |
1 files changed, 4 insertions, 0 deletions
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 |