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

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Message-ID: <CAL9mu0KJ0j6Rxf7YjKxVWKz_d+B6vrwqqxJM-fmzG=NonLeDYQ@mail.gmail.com>
Date:   Thu, 14 May 2020 15:07:32 +0800
From:   dillon min <dillon.minfei@...il.com>
To:     Alexandre Torgue <alexandre.torgue@...com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Mark Brown <broonie@...nel.org>, p.zabel@...gutronix.de,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        Hua Dillon <dillonhua@...il.com>
Subject: Re: [PATCH v2 2/3] ARM: dts: stm32: enable l3gd20 on stm32429-disco board

Hi Alexandre,

Alexandre Torgue <alexandre.torgue@...com> 于2020年5月14日周四 下午10:10写道：
>
> 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.

Sure, how about this patch sequence:
1 add spi5 dma to soc (stm32f429.dtsi)
2 add pin map for spi5 (stm32f4-pinctrl.dtsi)
3 add spi5 controller with gyro (stm32f429-disco.dts)
4 add spi modification to support gyro (spi-stm32.c)

5 add ltdc pin map for stm32f429-disco board (stm32f4-pinctrl.dtsi)
6 add ilitek-ili9341 dts bindings for disco (stm32f429-disco.dts,
depends on above step 3)
7 add yaml document about ilitek-ili9341 (ilitek,ili9341.yaml)
8 add clk changes to support ltdc driver (clk-stm32f4.c)

so, i will combine gyro and display two patches to one patchset next
time. right ?

thanks.
>
>
> > +     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";
> > +     };
> > +};
> >