linux-kernel - Re: [PATCH v5 2/2] leds: mt6360: Add LED driver for MT6360

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Message-ID: <CAE+NS379bgtRotqzioR+Ya3mE1kZrKfe9qV=W2p=hH7Omrn8Hw@mail.gmail.com>
Date:   Tue, 27 Oct 2020 17:28:51 +0800
From:   Gene Chen <gene.chen.richtek@...il.com>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>
Cc:     Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Dan Murphy <dmurphy@...com>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Gene Chen <gene_chen@...htek.com>, Wilma.Wu@...iatek.com,
        shufan_lee@...htek.com, cy_huang@...htek.com,
        benjamin.chao@...iatek.com
Subject: Re: [PATCH v5 2/2] leds: mt6360: Add LED driver for MT6360

Jacek Anaszewski <jacek.anaszewski@...il.com> 於 2020年10月21日 週三 上午5:47寫道：
>
> On 10/20/20 8:44 AM, Gene Chen wrote:
> > Jacek Anaszewski <jacek.anaszewski@...il.com> 於 2020年10月9日 週五 上午5:51寫道：
> >>
> >> Hi Gene,
> >>
> >> On 10/7/20 3:42 AM, Gene Chen wrote:
> >>> From: Gene Chen <gene_chen@...htek.com>
> >>>
> >>> Add MT6360 LED driver include 2-channel Flash LED with torch/strobe mode,
> >>> 3-channel RGB LED support Register/Flash/Breath Mode, and 1-channel for
> >>> moonlight LED.
> >>>
> >>> Signed-off-by: Gene Chen <gene_chen@...htek.com>
> >>> ---
> >>>    drivers/leds/Kconfig       |  12 +
> >>>    drivers/leds/Makefile      |   1 +
> >>>    drivers/leds/leds-mt6360.c | 783 +++++++++++++++++++++++++++++++++++++++++++++
> >>>    3 files changed, 796 insertions(+)
> >>>    create mode 100644 drivers/leds/leds-mt6360.c
> >>>
> >>> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> >>> index 1c181df..c7192dd 100644
> >>> --- a/drivers/leds/Kconfig
> >>> +++ b/drivers/leds/Kconfig
> >>> @@ -271,6 +271,18 @@ config LEDS_MT6323
> >>>          This option enables support for on-chip LED drivers found on
> >>>          Mediatek MT6323 PMIC.
> >>>
> >>> +config LEDS_MT6360
> >>> +     tristate "LED Support for Mediatek MT6360 PMIC"
> >>> +     depends on LEDS_CLASS_FLASH && OF
> >>> +     depends on LEDS_CLASS_MULTICOLOR
> >>
> >> Since CONFIG_LED_CLASS_MULTICOLOR can be turned off you need to have
> >> below instead:
> >>
> >> depends on LEDS_CLASS_MULTICOLOR || !!LEDS_CLASS_MULTICOLOR
> >>
> >> Unless you want to prevent enabling the driver without RGB LED,
> >> but that does not seem to be reasonable at first glance.
> >>
> >
> > May I change to "select LEDS_CLASS_MULTICOLOR"?
> > I suppose RGB always use multicolor mode.
>
> You will also have moonlight LED that will not need multicolor
> framework. Is it somehow troublesome to keep "depends on"?
>

If only use ML LED and FLED,  DTSI will only define ML LED and FLED.
Therefore, the drivers probe will not register rgb multicolor device.
I will remove "depends", use "select" instead.

> --
> Best regards,
> Jacek Anaszewski