On 9/16/20 4:22 PM, Ahmad Fatoum wrote:
> 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.
>
> We don't have a driver for the peripheral, but handling it as syscon
> allows using it with existing drivers that work with them, in particular
> a syscon-reboot-mode child node can be defined in board.dts (or fixed up
> by the bootloader) to exchange reboot mode information with the bootloader.
>
Looking at the title, I see now that there is nothing stm32mp specific in it.
I will rename the patch to
"ARM: dts: stm32: declare syscon node for TAMP peripheral in stm32mp151.dtsi"
when I send out v2.
> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
> arch/arm/boot/dts/stm32mp151.dtsi | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
> index bfe29023fbd5..fa4eb96c95af 100644
> --- a/arch/arm/boot/dts/stm32mp151.dtsi
> +++ b/arch/arm/boot/dts/stm32mp151.dtsi
> @@ -1144,6 +1144,11 @@ syscfg: syscon@50020000 {
> clocks = <&rcc SYSCFG>;
> };
>
> + tamp: tamp@5c00a000 {
> + compatible = "simple-bus", "syscon", "simple-mfd";
> + reg = <0x5c00a000 0x400>;
> + };
> +
> lptimer2: timer@50021000 {
> #address-cells = <1>;
> #size-cells = <0>;
>
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