linux-kernel - Re: [PATCH v10 08/12] pwm: mediatek: Add MT7629 compatible string

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Date:   Mon, 30 Sep 2019 11:36:29 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Sam Shih <sam.shih@...iatek.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        John Crispin <john@...ozen.org>, linux-pwm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v10 08/12] pwm: mediatek: Add MT7629 compatible string

On Mon, Sep 30, 2019 at 04:51:08PM +0800, Sam Shih wrote:
> Hi,
> 
> On Fri, 2019-09-27 at 13:28 +0200, Thierry Reding wrote:
> > On Wed, Sep 25, 2019 at 10:32:33PM +0800, Sam Shih wrote:
> > > This adds pwm support for MT7629, and separate mt7629 compatible string
> > > from mt7622
> > > 
> > > Signed-off-by: Sam Shih <sam.shih@...iatek.com>
> > > ---
> > >  drivers/pwm/pwm-mediatek.c | 6 ++++++
> > >  1 file changed, 6 insertions(+)
> > 
> > I picked this patch up and made some minor adjustments to make it build
> > without the num_pwms patches. With that I don't think there's anything
> > left from this series that you need.
> 
> Yes, I think the driver should work once dtsi updated.
> ("[v10,12/12] arm: dts: mediatek: add mt7629 pwm support")
> 
> But, due to we use comaptible string separately for every SoC now,
> The comaptible string in dt-bindings should be "mediatek,mt7629-pwm".
> I think we should use "[v10,11/12] dt-bindings: pwm: update bindings 
> for MT7629" to replace commit 1c00ad6ebf36aa3b0fa598a48b8ae59782be4121,
> Or maybe we need a little modification like this ?
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt ...
> - - "mediatek,mt7629-pwm", "mediatek,mt7622-pwm": found on mt7629 SoC.
> + - "mediatek,mt7629-pwm": found on mt7629 SoC.

Good catch, I must've taken this from the wrong version of the patch.

How about the attached patch?

Thanks,
Thierry
--- >8 ---
From 641b0ee176b139f9edd137ba636ca0cb9c63289a Mon Sep 17 00:00:00 2001
From: Thierry Reding <thierry.reding@...il.com>
Date: Mon, 30 Sep 2019 11:33:31 +0200
Subject: [PATCH] dt-bindings: pwm: mediatek: Remove gratuitous compatible
 string for MT7629

The MT7629 is, in fact, not compatible with the MT7622 because the
former has a single PWM channel while the former has 6. Remove the
gratuitous compatible string for MT7629.

Reported-by: Sam Shih <sam.shih@...iatek.com>
Signed-off-by: Thierry Reding <thierry.reding@...il.com>
---
 Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
index c8501530173c..053e9b5880f1 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
@@ -6,7 +6,7 @@ Required properties:
    - "mediatek,mt7622-pwm": found on mt7622 SoC.
    - "mediatek,mt7623-pwm": found on mt7623 SoC.
    - "mediatek,mt7628-pwm": found on mt7628 SoC.
-   - "mediatek,mt7629-pwm", "mediatek,mt7622-pwm": found on mt7629 SoC.
+   - "mediatek,mt7629-pwm": found on mt7629 SoC.
    - "mediatek,mt8516-pwm": found on mt8516 SoC.
  - reg: physical base address and length of the controller's registers.
  - #pwm-cells: must be 2. See pwm.txt in this directory for a description of
-- 
2.23.0


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