linux-kernel - Re: [PATCH v4 3/6] ARM: at91/dt: define sama5d3 clocks

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Date:	Mon, 09 Dec 2013 09:43:23 +0100
From:	boris brezillon <b.brezillon@...rkiz.com>
To:	Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org
CC:	Russell King <linux@....linux.org.uk>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Mike Turquette <mturquette@...aro.org>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/6] ARM: at91/dt: define sama5d3 clocks

Hello Arnd,

On 09/12/2013 03:09, Arnd Bergmann wrote:
> On Thursday 28 November 2013, Boris BREZILLON wrote:
>> @@ -92,6 +103,8 @@
>>   				dma-names = "tx", "rx";
>>   				pinctrl-names = "default";
>>   				pinctrl-0 = <&pinctrl_spi0>;
>> +				clocks = <&spi0_clk>;
>> +				clock-names = "spi_clk";
>>   				status = "disabled";
>>   			};
>>   
>> @@ -101,6 +114,8 @@
>>   				interrupts = <38 IRQ_TYPE_LEVEL_HIGH 4>;
>>   				pinctrl-names = "default";
>>   				pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>;
>> +				clocks = <&ssc0_clk>;
>> +				clock-names = "pclk";
>>   				status = "disabled";
>>   			};
>>   
> You are adding "clock-names" properties in a lot of cases. Are you sure you
> are using the strings that are documented in the respective device bindings
> for each name? In a lot of cases, drivers just want an anonymous clock
> and we don't name them.

I rechecked it, and almost all drivers call [devm_]clk_get with a 
specific clock
name, and as a result we must specify the "clock-names" property.
The only exceptions I found are the spi and PIT (Periodic Interval 
Timer) drivers,
and "clock-names" property is not defined in these nodes.


Best Regards,

Boris
>
> 	Arnd

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