From mboxrd@z Thu Jan  1 00:00:00 1970
From: christophe.roullier@st.com (Christophe ROULLIER)
Date: Wed, 23 May 2018 09:32:04 +0000
Subject: [PATCH V3 8/8] dt-bindings: stm32: add compatible for syscon
In-Reply-To: <20180522172238.GA26145@rob-hp-laptop>
References: <1526890046-10565-1-git-send-email-christophe.roullier@st.com>
 <1526890046-10565-9-git-send-email-christophe.roullier@st.com>
 <20180522172238.GA26145@rob-hp-laptop>
Message-ID: <4f6941a0-4b41-f2db-52b1-d45aa7287fa2@st.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 05/22/2018 07:22 PM, Rob Herring wrote:
> On Mon, May 21, 2018 at 10:07:26AM +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 | 5 +++++
>>   1 file changed, 5 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/stm32.txt b/Documentation/devicetree/bindings/arm/stm32.txt
>> index 6808ed9..e46ebad 100644
>> --- a/Documentation/devicetree/bindings/arm/stm32.txt
>> +++ b/Documentation/devicetree/bindings/arm/stm32.txt
>> @@ -8,3 +8,8 @@ using one of the following compatible strings:
>>     st,stm32f746
>>     st,stm32h743
>>     st,stm32mp157
>> +
>> +Required nodes:
>> +- syscon: the soc bus node must have a system controller node pointing to the
>> +  global control registers, with the compatible string
>> +  "st,stm32mp157-syscfg", "syscon";
> 
> Please don't mix soc/board bindings with other nodes. So perhaps
> stm32-syscon.txt.
> 
> Rob
> 

Hi Rob,

Is it ok for you with this tree file:

Documentation/devicetree/bindings/arm/stm32/stm32.txt
Documentation/devicetree/bindings/arm/stm32/stm32-syscon.txt
	With stm32-syscon.txt:

---------------------------------------------------
STMicroelectronics STM32 Platforms System Controller

Properties:
  - compatible : should contain two values. First value must be :
		- " st,stm32mp157-syscfg " - for stm32mp157 based SoCs,
		second value must be always "syscon".
  - reg : offset and length of the register set.

Example:
	syscfg: system-config at 50020000 {
		compatible = "st,stm32mp157-syscfg", "syscon";
		reg = <0x50020000 0x400>;
	};
---------------------------------------------------

Do we need to update also all MCU family (stm32f4, stm32h7, stm32f7) 
property to be coherent ?

Thanks for your feedback.

Christophe.