linux-kernel - Re: [PATCH v5 2/3] clk: meson: add DT documentation for emmc clock controller

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Message-ID: <153997224756.53599.3138050846693192599@swboyd.mtv.corp.google.com>
Date:   Fri, 19 Oct 2018 11:04:07 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Jianxin Pan <jianxin.pan@...ogic.com>,
        Neil Armstrong <narmstrong@...libre.com>
Cc:     Yixun Lan <yixun.lan@...ogic.com>,
        Kevin Hilman <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Liang Yang <liang.yang@...ogic.com>,
        Jian Hu <jian.hu@...ogic.com>,
        Qiufang Dai <qiufang.dai@...ogic.com>,
        Hanjie Lin <hanjie.lin@...ogic.com>,
        Victor Wan <victor.wan@...ogic.com>, linux-clk@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/3] clk: meson: add DT documentation for emmc clock controller

Quoting Jianxin Pan (2018-10-19 08:50:08)
> On 2018/10/19 1:08, Stephen Boyd wrote:
> > Quoting Jianxin Pan (2018-10-17 22:07:24)
> >> diff --git a/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
> >> new file mode 100644
> >> index 0000000..9e6d343
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt
> >> @@ -0,0 +1,31 @@
> >> +* Amlogic MMC Sub Clock Controller Driver
> >> +
> >> +The Amlogic MMC clock controller generates and supplies clock to support
> >> +MMC and NAND controller
> >> +
> >> +Required Properties:
> >> +
> >> +- compatible: should be:
> >> +               "amlogic,gx-mmc-clkc"
> >> +               "amlogic,axg-mmc-clkc"
> >> +
> >> +- #clock-cells: should be 1.
> >> +- clocks: phandles to clocks corresponding to the clock-names property
> >> +- clock-names: list of parent clock names
> >> +       - "clkin0", "clkin1"
> >> +
> >> +Parent node should have the following properties :
> > 
> > The example only has one node. Can you add two nodes?
> OK. This clock is used by nand and emmc. I will add a new example for emmc too.
> Thank you for your review.

Maybe I misunderstand. I thought the clk controller was two nodes, but
it isn't? This wording is trying to explain what a consumer should look
like?