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To:     Jerome Brunet <jbrunet@baylibre.com>,
        Jianxin Pan <jianxin.pan@amlogic.com>,
        Neil Armstrong <narmstrong@baylibre.com>
From:   Stephen Boyd <sboyd@kernel.org>
In-Reply-To: <b401f5bc-32e7-1693-0839-87ffa3dd5767@amlogic.com>
Cc:     Yixun Lan <yixun.lan@amlogic.com>,
        Kevin Hilman <khilman@baylibre.com>,
        Carlo Caione <carlo@caione.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Rob Herring <robh@kernel.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Boris Brezillon <boris.brezillon@bootlin.com>,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        Liang Yang <liang.yang@amlogic.com>,
        Jian Hu <jian.hu@amlogic.com>,
        Qiufang Dai <qiufang.dai@amlogic.com>,
        Hanjie Lin <hanjie.lin@amlogic.com>,
        Victor Wan <victor.wan@amlogic.com>, linux-clk@vger.kernel.org,
        linux-amlogic@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
References: <1542284312-55418-1-git-send-email-jianxin.pan@amlogic.com>
 <1542284312-55418-3-git-send-email-jianxin.pan@amlogic.com>
 <154387713374.88331.16436869339024592009@swboyd.mtv.corp.google.com>
 <b401f5bc-32e7-1693-0839-87ffa3dd5767@amlogic.com>
Message-ID: <154395151564.88331.17622786431747155066@swboyd.mtv.corp.google.com>
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Subject: Re: [PATCH v7 2/4] clk: meson: add DT documentation for emmc clock controller
Date:   Tue, 04 Dec 2018 11:25:15 -0800
Sender: linux-kernel-owner@vger.kernel.org
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Quoting Jianxin Pan (2018-12-03 18:39:34)
> Hi Stephen,
> =

> On 2018/12/4 6:45, Stephen Boyd wrote:
> > Quoting Jianxin Pan (2018-11-15 04:18:30)
> >> diff --git a/include/dt-bindings/clock/amlogic,mmc-clkc.h b/include/dt=
-bindings/clock/amlogic,mmc-clkc.h
> >> new file mode 100644
> >> index 0000000..162b949
> >> --- /dev/null
> >> +++ b/include/dt-bindings/clock/amlogic,mmc-clkc.h
> >> @@ -0,0 +1,17 @@
> >> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
> >> +/*
> >> + * Meson MMC sub clock tree IDs
> >> + *
> >> + * Copyright (c) 2018 Amlogic, Inc. All rights reserved.
> >> + * Author: Yixun Lan <yixun.lan@amlogic.com>
> >> + */
> >> +
> >> +#ifndef __MMC_CLKC_H
> >> +#define __MMC_CLKC_H
> >> +
> >> +#define CLKID_MMC_DIV                          1
> > =

> > Why does the define numbering start with 1 instead of 0?
> >
> The Clock ID 0 is used by  CLKID_MMC_MUX.
> CLKID_MMC_MUX is an internal clock which defined in drivers/clk/meson/mmc=
-clkc.c, and it's the parent of CLKID_MMC_DIV.

Ok, thanks.