linux-kernel - Re: [PATCH v2 6/7] ARM: dts: imx6dl-prtvt7: fix PWM cell count for the backlight node.

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Message-ID: <CAOMZO5C6RM2vEMFJB-+Nen1Et8wn39JJVM1UcOcar0aMebKykQ@mail.gmail.com>
Date:   Thu, 21 Jan 2021 11:17:42 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        David Jander <david@...tonic.nl>,
        Robin van der Gracht <robin@...tonic.nl>,
        DRI mailing list <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH v2 6/7] ARM: dts: imx6dl-prtvt7: fix PWM cell count for
 the backlight node.

Hi Oleksij,

On Thu, Jan 21, 2021 at 3:12 AM Oleksij Rempel <o.rempel@...gutronix.de> wrote:
>
> At some point PWM cell count was changed, but it didn't triggered any

It changed in this commit:

commit fa28d8212ede9c533ae87a737571a9d3b3eebb29
Author: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Date:   Fri Jul 10 07:19:37 2020 +0200

    ARM: dts: imx: default to #pwm-cells = <3> in the SoC dtsi files

    The imx-pwm driver supports 3 cells and this is the more flexible setting.
    So use it by default and overwrite it back to two for the files that
    reference the PWMs with just 2 cells to minimize changes.

    This allows to drop explicit setting to 3 cells for the boards that already
    depend on this. The boards that are now using 2 cells explicitly can be
    converted to 3 individually.

    Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
    Signed-off-by: Shawn Guo <shawnguo@...nel.org>