linux-kernel - Re: [PATCH v2 3/5] ARM: dts: Add I2C1 support for STM32F429 SoC

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Date:	Fri, 3 Jun 2016 09:57:11 +0200
From:	"M'boumba Cedric Madianga" <cedric.madianga@...il.com>
To:	Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc:	Patrice Chotard <patrice.chotard@...com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Rob Herring <robh+dt@...nel.org>, linux@...linux.org.uk,
	linux-i2c@...r.kernel.org,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"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 v2 3/5] ARM: dts: Add I2C1 support for STM32F429 SoC

2016-06-02 18:07 GMT+02:00 Maxime Coquelin <mcoquelin.stm32@...il.com>:
> 2016-06-02 16:26 GMT+02:00 M'boumba Cedric Madianga <cedric.madianga@...il.com>:
>> Signed-off-by: Patrice Chotard <patrice.chotard@...com>
>> Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@...il.com>
>> ---
>>  arch/arm/boot/dts/stm32f429.dtsi | 24 ++++++++++++++++++++++++
>>  1 file changed, 24 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/stm32f429.dtsi b/arch/arm/boot/dts/stm32f429.dtsi
>> index 434d4b9..d5857eb 100644
>> --- a/arch/arm/boot/dts/stm32f429.dtsi
>> +++ b/arch/arm/boot/dts/stm32f429.dtsi
>> @@ -323,6 +323,18 @@
>>                                         slew-rate = <2>;
>>                                 };
>>                         };
>> +
>> +                       i2c1_sda_pin: i2c1_sda@0 {
>> +                               pins {
>> +                                       pinmux = <STM32F429_PB9_FUNC_I2C1_SDA>;
>> +                                       drive-open-drain;
>> +                               };
>> +                       };
>> +                       i2c1_scl_pin: i2c1_scl@0 {
>> +                               pins {
>> +                                       pinmux = <STM32F429_PB6_FUNC_I2C1_SCL>;
>> +                               };
>> +                       };
>>                 };
> Shouldn't be preferrable to group the two functions in a single one,
I agree. It is better.
>
>             usart1_pins_a: usart1@0 {
>                 pins1 {
>                     pinmux = <STM32F429_PA9_FUNC_USART1_TX>;
>                     bias-disable;
>                     drive-push-pull;
>                     slew-rate = <0>;
>                 };
>                 pins2 {
>                     pinmux = <STM32F429_PA10_FUNC_USART1_RX>;
>                     bias-disable;
>                 };
>             };
>
> Also, I would prefer the phandle to be suffixed with the port number,
> as multiple muxing options are available, for example "i2c1_pins_b".
Ok understood. I will fix that in the V3.
Thanks
>
> Thanks,
> Maxime