netdev - Re: [PATCH v11 6/6] powerpc: Add flexcan device support for p1010rdb.

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Date:	Thu, 11 Aug 2011 18:35:08 +0200
From:	Wolfgang Grandegger <wg@...ndegger.com>
To:	Robin Holt <holt@....com>
CC:	Kumar Gala <galak@...nel.crashing.org>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	U Bhaskar-B22300 <B22300@...escale.com>,
	Scott Wood <scottwood@...escale.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	netdev@...r.kernel.org, socketcan-core@...ts.berlios.de,
	PPC list <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v11 6/6] powerpc: Add flexcan device support for p1010rdb.

On 08/11/2011 06:07 PM, Robin Holt wrote:
> Allow the p1010 processor to select the flexcan network driver.
> 
> Signed-off-by: Robin Holt <holt@....com>
> Acked-by: Marc Kleine-Budde <mkl@...gutronix.de>,
> Acked-by: Wolfgang Grandegger <wg@...ndegger.com>,
> Cc: U Bhaskar-B22300 <B22300@...escale.com>
> Cc: socketcan-core@...ts.berlios.de,
> Cc: netdev@...r.kernel.org,
> Cc: PPC list <linuxppc-dev@...ts.ozlabs.org>
> Cc: Kumar Gala <galak@...nel.crashing.org>
> ---
>  arch/powerpc/boot/dts/p1010rdb.dts  |    8 ++++++++
>  arch/powerpc/platforms/85xx/Kconfig |    2 ++
>  2 files changed, 10 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/powerpc/boot/dts/p1010rdb.dts b/arch/powerpc/boot/dts/p1010rdb.dts
> index d6c669c..df89b60 100644
> --- a/arch/powerpc/boot/dts/p1010rdb.dts
> +++ b/arch/powerpc/boot/dts/p1010rdb.dts
> @@ -171,6 +171,14 @@
>  			};
>  		};
>  
> +		can@...00 {
> +			clock-frequency = <0x0bebc1fc>;
> +		};


	                clock-frequency = <200000000>; // filled in by boot-loader

Is better readable and makes clear that the value is filled in by the
boot loader. Usually we specify "<0>" in that case but it will *not*
work with your board because U-Boot fills into the property "clock_freq"
the CCB-frequency, which is twice as much. This needs to be fixed.

> +		can1: can@...00 {

What is the "can1:" good for?

> +			clock-frequency = <0x0bebc1fc>;

See above.

Wolfgang.




>  		usb@...00 {
>  			phy_type = "utmi";
>  		};
> diff --git a/arch/powerpc/platforms/85xx/Kconfig b/arch/powerpc/platforms/85xx/Kconfig
> index 498534c..c4304ae 100644
> --- a/arch/powerpc/platforms/85xx/Kconfig
> +++ b/arch/powerpc/platforms/85xx/Kconfig
> @@ -70,6 +70,8 @@ config MPC85xx_RDB
>  config P1010_RDB
>  	bool "Freescale P1010RDB"
>  	select DEFAULT_UIMAGE
> +	select HAVE_CAN_FLEXCAN if NET && CAN
> +	select PPC_CLOCK if CAN_FLEXCAN
>  	help
>  	  This option enables support for the MPC85xx RDB (P1010 RDB) board
>  

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