linux-kernel - Re: [PATCH] dt-bindings: serial: stm32: add examples

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Message-ID: <60c2caa0-4b69-4460-63b4-6debf1065c42@foss.st.com>
Date:   Wed, 10 Mar 2021 08:41:43 +0000
From:   Valentin CARON - foss <valentin.caron@...s.st.com>
To:     Rob Herring <robh@...nel.org>
CC:     Alexandre TORGUE - foss <alexandre.torgue@...s.st.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Erwan LE-RAY - foss <erwan.leray@...s.st.com>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: serial: stm32: add examples


On 3/5/21 7:53 PM, Rob Herring wrote:
> On Tue, Feb 09, 2021 at 10:59:48AM +0100, Valentin Caron wrote:
>> From: Valentin Caron <valentin.caron@...com>
>>
>> Add examples to show more use cases :
>>   - uart2 with hardware flow control
>>   - uart4 without flow control
> Why do I need these? I can go read your dts files if I need more
> examples.
Hi,

These examples were present in the dt-binding before the convertion to 
json :

https://patchwork.kernel.org/project/linux-arm-kernel/patch/20200122095558.22553-3-benjamin.gaignard@st.com/

Would you like a v2 with this precision ?
However this is not an essential patch, we can just drop it.
>
>> Signed-off-by: Valentin Caron <valentin.caron@...s.st.com>
>> ---
>>   .../bindings/serial/st,stm32-uart.yaml        | 20 +++++++++++++++++++
>>   1 file changed, 20 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
>> index 06d5f251ec88..3a4aab5d1862 100644
>> --- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
>> +++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
>> @@ -82,6 +82,26 @@ additionalProperties: false
>>   examples:
>>     - |
>>       #include <dt-bindings/clock/stm32mp1-clks.h>
>> +
>> +    usart4: serial@...04c00 {
>> +      compatible = "st,stm32-uart";
>> +      reg = <0x40004c00 0x400>;
>> +      interrupts = <52>;
>> +      clocks = <&clk_pclk1>;
>> +      pinctrl-names = "default";
>> +      pinctrl-0 = <&pinctrl_usart4>;
>> +    };
>> +
>> +    usart2: serial@...04400 {
>> +      compatible = "st,stm32-uart";
>> +      reg = <0x40004400 0x400>;
>> +      interrupts = <38>;
>> +      clocks = <&clk_pclk1>;
>> +      st,hw-flow-ctrl;
>> +      pinctrl-names = "default";
>> +      pinctrl-0 = <&pinctrl_usart2 &pinctrl_usart2_rtscts>;
>> +    };
>> +
>>       usart1: serial@...11000 {
>>         compatible = "st,stm32-uart";
>>         reg = <0x40011000 0x400>;
>> -- 
>> 2.17.1
>>