linux-kernel - Re: [PATCH v2 06/16] arm64: dts: add Hi6220 spi configuration nodes

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Date:	Tue, 12 Apr 2016 17:40:49 +0800
From:	Guodong Xu <guodong.xu@...aro.org>
To:	Rob Herring <robh@...nel.org>
Cc:	Xu Wei <xuwei5@...ilicon.com>, Mark Rutland <mark.rutland@....com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...aro.org>,
	Arnd Bergmann <arnd.bergmann@...aro.org>,
	devicetree@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	XinWei Kong <kong.kongxinwei@...ilicon.com>,
	Zhong Kaihua <zhongkaihua@...wei.com>
Subject: Re: [PATCH v2 06/16] arm64: dts: add Hi6220 spi configuration nodes

On 4 April 2016 at 13:16, Rob Herring <robh@...nel.org> wrote:
> On Sat, Apr 02, 2016 at 05:29:33PM +0800, Guodong Xu wrote:
>> From: Zhong Kaihua <zhongkaihua@...wei.com>
>>
>> Add Hi6220 spi configuration nodes
>>
>> Signed-off-by: Zhong Kaihua <zhongkaihua@...wei.com>
>> Signed-off-by: Wei Xu <xuwei5@...ilicon.com>
>> ---
>>  arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts   |  1 +
>>  arch/arm64/boot/dts/hisilicon/hi6220.dtsi        | 15 +++++++++++++++
>>  arch/arm64/boot/dts/hisilicon/hikey-pinctrl.dtsi | 21 +++++++++++++++++++++
>>  3 files changed, 37 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
>> index 985a2ad..5c9ee31 100644
>> --- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
>> +++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
>> @@ -20,6 +20,7 @@
>>               serial1 = &uart1; /* BT UART */
>>               serial2 = &uart2; /* LS Expansion UART0 */
>>               serial3 = &uart3; /* LS Expansion UART1 */
>> +             spi0 = &spi_0;
>
> You shouldn't really need an alias for SPI.

Will remove it.

>
>>       };
>>
>>       chosen {
>> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
>> index e96cc3c..dcca83b 100644
>> --- a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
>> +++ b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
>> @@ -585,5 +585,20 @@
>>                       clock-names = "apb_pclk";
>>                       status = "ok";
>>               };
>> +
>> +             spi_0: spi@...06000 {
>> +                     compatible = "arm,pl022", "arm,primecell";
>> +                     reg = <0x0 0xf7106000 0x0 0x1000>;
>> +                     interrupts = <0 50 4>;
>> +                     bus-id = <0>;
>> +                     enable-dma = <0>;
>> +                     clocks = <&sys_ctrl HI6220_SPI_CLK>;
>> +                     clock-names = "apb_pclk";
>> +                     pinctrl-names = "default";
>> +                     pinctrl-0 = <&spi0_pmx_func &spi0_cfg_func>;
>> +                     num-cs = <1>;
>> +                     cs-gpios = <&gpio6 2 0>;
>> +                     status = "ok";
>
> You only need an ok to override a disabled status, so I think you can
> drop this. Or disable by default and let boards override it if that
> makes sense.

Thanks. I will modify this to "disabled", and enable it in board dts:
hi6220-hikey.dts

-Guodong

>
> Rob