linux-kernel - Re: [PATCH V5 Base on RC7 3/3] Add reset controller for hi6220 SoC platform.

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Date:	Thu, 29 Oct 2015 16:34:39 +0800
From:	chenfeng <puck.chen@...ilicon.com>
To:	Philipp Zabel <p.zabel@...gutronix.de>
CC:	<linux-kernel@...r.kernel.org>, <robh+dt@...nel.org>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>
Subject: Re: [PATCH V5 Base on RC7 3/3] Add reset controller for hi6220 SoC
 platform.

Thanks.

On 2015/10/28 19:42, Philipp Zabel wrote:
> Am Dienstag, den 27.10.2015, 17:51 +0800 schrieb Chen Feng:
>> reset: add driver for hi6220 reset controller
>>
>> Signed-off-by: Chen Feng <puck.chen@...ilicon.com>
>> ---
>>  arch/arm64/boot/dts/hisilicon/hi6220.dtsi | 7 +++++++
>>  1 file changed, 7 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
>> index 3f03380..3f055e2 100644
>> --- a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
>> +++ b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
>> @@ -167,5 +167,12 @@
>>  			clocks = <&ao_ctrl 36>, <&ao_ctrl 36>;
>>  			clock-names = "uartclk", "apb_pclk";
>>  		};
>> +
>> +		reset_ctrl: reset_ctrl@...30000 {
>> +			compatible = "hisilicon,hi6220-reset-ctl";
>> +			reg = <0x0 0xf7030000 0x0 0x1000>;
>> +			#reset-cells = <1>;
>> +		};
>> +
> 
> While applying I just noticed that the device tree already contains a
> node claiming the same address space:
> 
> 	sys_ctrl: sys_ctrl@...30000 {
> 		compatible = "hisilicon,hi6220-sysctrl", "syscon";
> 		reg = <0x0 0xf7030000 0x0 0x2000>;
> 		#clock-cells = <1>;
> 	};
> 
> It is documented in
> Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt and
> Documentation/devicetree/bindings/clock/hi6220-clock.txt.
> 
> Could you clarify whether the reset controls are just part of the
> sys_ctrl block? If so, I think you should add #reset-cells = <1> to the
> sys_ctrl node instead.
> 

Yes, It's a part of the sys_ctrl block, I will do as your advice.
> regards
> Philipp
> 
> 
> .
> 

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