From mboxrd@z Thu Jan  1 00:00:00 1970
From: robh@kernel.org (Rob Herring)
Date: Tue, 1 May 2018 09:01:24 -0500
Subject: [PATCH  8/8] dt-bindings: stm32: add compatible for syscon
In-Reply-To: <1524582120-4451-9-git-send-email-christophe.roullier@st.com>
References: <1524582120-4451-1-git-send-email-christophe.roullier@st.com>
 <1524582120-4451-9-git-send-email-christophe.roullier@st.com>
Message-ID: <20180501140124.GA17771@rob-hp-laptop>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Tue, Apr 24, 2018 at 05:02:00PM +0200, Christophe Roullier wrote:
> This patch describes syscon DT bindings.
> 
> Signed-off-by: Christophe Roullier <christophe.roullier@st.com>
> ---
>  Documentation/devicetree/bindings/arm/stm32.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/stm32.txt b/Documentation/devicetree/bindings/arm/stm32.txt
> index 6808ed9..a871a78 100644
> --- a/Documentation/devicetree/bindings/arm/stm32.txt
> +++ b/Documentation/devicetree/bindings/arm/stm32.txt
> @@ -8,3 +8,10 @@ using one of the following compatible strings:
>    st,stm32f746
>    st,stm32h743
>    st,stm32mp157
> +
> +Required nodes:
> +
> +- syscon: some subnode of the STM32 SoC node must be a
> +  system controller node pointing to the control registers,
> +  with the compatible string set to one of these tuples:
> +  "st,stm32-syscfg", "syscon"

This should be a separate file.

I'd guess the syscfg registers differ from SoC to SoC, so you need more 
specific compatible strings.

Rob