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From: Chen-Yu Tsai <wenst@chromium.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: "zhiyong.tao" <zhiyong.tao@mediatek.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Sean Wang <sean.wang@kernel.org>,
	srv_heupstream <srv_heupstream@mediatek.com>,
	hui.liu@mediatek.com, Eddie Huang <eddie.huang@mediatek.com>,
	Light Hsieh <light.hsieh@mediatek.com>,
	Biao Huang <biao.huang@mediatek.com>,
	Hongzhou Yang <hongzhou.yang@mediatek.com>,
	Sean Wang <sean.wang@mediatek.com>,
	Seiya Wang <seiya.wang@mediatek.com>,
	Devicetree List <devicetree@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
	<linux-arm-kernel@lists.infradead.org>,
	"moderated list:ARM/Mediatek SoC support" 
	<linux-mediatek@lists.infradead.org>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>
Subject: Re: [PATCH v10 1/2] dt-bindings: pinctrl: mt8195: add rsel define
Date: Mon, 16 Aug 2021 14:10:21 +0800	[thread overview]
Message-ID: <CAGXv+5HohMwU8jow5QXO5MK1tO+u=5YsfhArBWCP4Dgm1Q8igg@mail.gmail.com> (raw)
In-Reply-To: <CACRpkdZ4k9Km3vBtdN6AnBM89c4355GtPMzCQ0_YHaTb4V5cKA@mail.gmail.com>

On Thu, Aug 5, 2021 at 7:02 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> On Thu, Jul 29, 2021 at 11:43 AM Chen-Yu Tsai <wenst@chromium.org> wrote:
> > On Thu, Jul 29, 2021 at 4:23 PM zhiyong.tao <zhiyong.tao@mediatek.com> wrote:
>
> > > The rsel actual bias resistance of each setting is different in
> > > different IC. we think that the define "MTK_PULL_SET_RSEL_000" is more
> > > common for all different IC.
> >
> > I see. I personally prefer having things clearly described. I can
> > understand this might be an extra burden to support different chips
> > with different parameters, though this should be fairly straightforward
> > with lookup tables tied to the compatible strings.
> >
> > Let's see if Rob and Linus have anything to add.
>
> Not much. We have "soft pushed" for this to be described as generic
> as possible, using SI units (ohms). But we also allow vendor-specific
> numbers in this attribute. Especially when reverse engineering SoCs
> that the contributor don't really have specs on (example M1 Mac).
>
> The intent with the SI units is especially for people like you folks working
> with Chromium to be able to use different SoCs and not feel lost
> to a forest of different ways of doing things and associated
> mistakes because vendors have hopelessly idiomatic pin configs.

I'll take that as "use SI units whenever possible and reasonable".

Thanks.

ChenYu

  reply	other threads:[~2021-08-16  6:10 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-10  8:17 [PATCH v10 0/2] Mediatek pinctrl patch on mt8195 Zhiyong Tao
2021-07-10  8:17 ` [PATCH v10 1/2] dt-bindings: pinctrl: mt8195: add rsel define Zhiyong Tao
2021-07-13  7:17   ` Chen-Yu Tsai
2021-07-22  7:54     ` zhiyong tao
2021-07-26  8:02       ` Chen-Yu Tsai
     [not found]         ` <07388dac4e25e0f260725e8f80ba099d5aa80949.camel@mediatek.com>
2021-07-29  9:43           ` Chen-Yu Tsai
2021-08-04 23:01             ` Linus Walleij
2021-08-16  6:10               ` Chen-Yu Tsai [this message]
     [not found]                 ` <4fd12d5c53f6492e5fa3ba94a78b9a149f5b6ed9.camel@mediatek.com>
2021-08-16 15:37                   ` Chen-Yu Tsai
2021-08-16 23:00                     ` Linus Walleij
     [not found]                       ` <a7c8ab68ac3513865698cde27e665bdd554f459e.camel@mediatek.com>
2021-08-17  5:44                         ` Chen-Yu Tsai
     [not found]                           ` <d40f6d5fd26aedb13e7a393202e5794b1893ecf8.camel@mediatek.com>
2021-08-17 20:09                             ` Linus Walleij
2021-08-18  6:25                               ` Chen-Yu Tsai
2021-07-10  8:17 ` [PATCH v10 2/2] pinctrl: mediatek: add rsel setting on MT8195 Zhiyong Tao

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