linux-kernel - Re: [PATCH v3 1/5] clk: sunxi: Add apb0 gates for H3

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Date:	Fri, 5 Feb 2016 12:58:37 +0100
From:	Krzysztof Adamski <k@...ko.eu>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Jean-Francois Moine <moinejf@...e.fr>,
	inus Walleij <linus.walleij@...aro.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
	Jens Kuske <jenskuske@...il.com>,
	Fabian Frederick <fabf@...net.be>,
	Vishnu Patekar <vishnupatekar0510@...il.com>,
	linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v3 1/5] clk: sunxi: Add apb0 gates for H3

On Fri, Feb 05, 2016 at 12:11:52PM +0100, Maxime Ripard wrote:
>Hi,
>
>On Thu, Feb 04, 2016 at 03:47:52PM +0100, Jean-Francois Moine wrote:
>> On Thu,  4 Feb 2016 00:33:46 +0100
>> Krzysztof Adamski <k@...ko.eu> wrote:
>>
>> > This patch adds support for APB0 in H3. It seems to be compatible with
>> > earlier SOCs. apb0 gates controls R_ block peripherals (R_PIO, R_IR,
>> > etc).
>> >
>> > Signed-off-by: Krzysztof Adamski <k@...ko.eu>
>> > ---
>> >  Documentation/devicetree/bindings/clock/sunxi.txt | 1 +
>> >  drivers/clk/sunxi/clk-simple-gates.c              | 2 ++
>> >  2 files changed, 3 insertions(+)
>> >
>> > diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
>> > index e59f57b..751c8b9f0 100644
>> > --- a/Documentation/devicetree/bindings/clock/sunxi.txt
>> > +++ b/Documentation/devicetree/bindings/clock/sunxi.txt
>> > @@ -45,6 +45,7 @@ Required properties:
>> >  	"allwinner,sun6i-a31-apb0-gates-clk" - for the APB0 gates on A31
>> >  	"allwinner,sun7i-a20-apb0-gates-clk" - for the APB0 gates on A20
>> >  	"allwinner,sun8i-a23-apb0-gates-clk" - for the APB0 gates on A23
>> > +	"allwinner,sun8i-h3-apb0-gates-clk" - for the APB0 gates on H3
>> >  	"allwinner,sun9i-a80-apb0-gates-clk" - for the APB0 gates on A80
>> >  	"allwinner,sun4i-a10-apb1-clk" - for the APB1 clock
>> >  	"allwinner,sun9i-a80-apb1-clk" - for the APB1 bus clock on A80
>> > diff --git a/drivers/clk/sunxi/clk-simple-gates.c b/drivers/clk/sunxi/clk-simple-gates.c
>> > index f4da52b..6753c87 100644
>> > --- a/drivers/clk/sunxi/clk-simple-gates.c
>> > +++ b/drivers/clk/sunxi/clk-simple-gates.c
>> > @@ -130,6 +130,8 @@ CLK_OF_DECLARE(sun8i_a23_apb2, "allwinner,sun8i-a23-apb2-gates-clk",
>> >  	       sunxi_simple_gates_init);
>> >  CLK_OF_DECLARE(sun8i_a33_ahb1, "allwinner,sun8i-a33-ahb1-gates-clk",
>> >  	       sunxi_simple_gates_init);
>> > +CLK_OF_DECLARE(sun8i_h3_apb0, "allwinner,sun8i-h3-apb0-gates-clk",
>> > +	       sunxi_simple_gates_init);
>> >  CLK_OF_DECLARE(sun9i_a80_ahb0, "allwinner,sun9i-a80-ahb0-gates-clk",
>> >  	       sunxi_simple_gates_init);
>> >  CLK_OF_DECLARE(sun9i_a80_ahb1, "allwinner,sun9i-a80-ahb1-gates-clk",
>>
>> It seems that the other compatible strings are there for historical
>> reasons. Why do you need a new one with such a specific name?
>>
>> It would have been more sensible to add a generic compatible string as
>> "allwinner,apb-gates", letting the removal of the other strings for a
>> later patch...
>
>Yeah, it's a good idea, and it's probably time that we move to that.
>
>However, I'd like to keep per-soc and per-clocks compatibles in the
>DT, in case we need to protect a clock in the future. That doesn't
>prevent to have two compatibles thoughe, the specific and the generic.
>

So now I'm not sure what you mean. You suggest that I should keep using 
specific (sun8i_h3_apb0) or change to generic (apb-gates) in my patch?