linux-kernel - Re: [PATCH v2 2/3] ARM: dts: stm32: enable l3gd20 on stm32429-disco board

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Message-ID: <da9fbb80-571d-1217-4028-e413a0c7db84@st.com>
Date:   Thu, 14 May 2020 16:09:48 +0200
From:   Alexandre Torgue <alexandre.torgue@...com>
To:     <dillon.minfei@...il.com>, <robh+dt@...nel.org>,
        <mcoquelin.stm32@...il.com>, <broonie@...nel.org>,
        <p.zabel@...gutronix.de>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>, <dillonhua@...il.com>
Subject: Re: [PATCH v2 2/3] ARM: dts: stm32: enable l3gd20 on stm32429-disco
 board

Hi Dillon

On 5/12/20 9:36 AM, dillon.minfei@...il.com wrote:
> From: dillon min <dillon.minfei@...il.com>
> 
> L3gd20, st mems motion sensor, 3-axis digital output gyroscope,
> connect to stm32f429 via spi5
> 
> Signed-off-by: dillon min <dillon.minfei@...il.com>
> ---
> 
> Hi Alexandre,
> 
> V2:
>      1, insert blank line at stm32f420-disco.dts line 143
>      2, add more description about l3gd20 in commit message
> 
> V1:
>      enable l3gd20 dts binding on stm32f429-disco
> 
> thanks.
> 
> dillon,
> 
>   arch/arm/boot/dts/stm32f429-disco.dts | 25 +++++++++++++++++++++++++
>   1 file changed, 25 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/stm32f429-disco.dts b/arch/arm/boot/dts/stm32f429-disco.dts
> index 30c0f67..1bfb903 100644
> --- a/arch/arm/boot/dts/stm32f429-disco.dts
> +++ b/arch/arm/boot/dts/stm32f429-disco.dts
> @@ -49,6 +49,8 @@
>   #include "stm32f429.dtsi"
>   #include "stm32f429-pinctrl.dtsi"
>   #include <dt-bindings/input/input.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/gpio/gpio.h>
>   
>   / {
>   	model = "STMicroelectronics STM32F429i-DISCO board";
> @@ -127,3 +129,26 @@
>   	pinctrl-names = "default";
>   	status = "okay";
>   };
> +
> +&spi5 {
> +	status = "okay";
> +	pinctrl-0 = <&spi5_pins>;
> +	pinctrl-names = "default";
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	cs-gpios = <&gpioc 1 GPIO_ACTIVE_LOW>;
> +	dmas = <&dma2 3 2 0x400 0x0>,
> +	       <&dma2 4 2 0x400 0x0>;
> +	dma-names = "rx", "tx";
> +

You added this spi5 node in this patch but also in the display series. I 
will have issue to merge. Even if I could fix it easily, as you are 
going to resend, the good practice could be to have several patches in 
one series: one patch for spi5 controller, another for gyro and another 
for display.

And also same remark than Linus did in display series move DMA to soc 
dtsi file please.


> +	l3gd20: l3gd20@0 {
> +		compatible = "st,l3gd20-gyro";
> +		spi-max-frequency = <10000000>;
> +		st,drdy-int-pin = <2>;
> +		interrupt-parent = <&gpioa>;
> +		interrupts = <1 IRQ_TYPE_EDGE_RISING>,
> +				<2 IRQ_TYPE_EDGE_RISING>;
> +		reg = <0>;
> +		status = "okay";
> +	};
> +};
>