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

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Message-ID: <20160204205602.GC12071@box2.japko.eu>
Date:	Thu, 4 Feb 2016 21:56:02 +0100
From:	Krzysztof Adamski <k@...ko.eu>
To:	Jean-Francois Moine <moinejf@...e.fr>
Cc:	inus Walleij <linus.walleij@...aro.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	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 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...

Seems like a good idea but is it possible to remove those binding in 
separate patch? I mean, wouldn't that, in theory, break ABI? Are such 
patches accepted?