netdev - Re: [PATCH v11 4/5] powerpc: Add flexcan device support for p1010rdb.

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Date:	Wed, 10 Aug 2011 12:01:51 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Robin Holt <holt@....com>
Cc:	Wolfgang Grandegger <wg@...ndegger.com>,
	U Bhaskar-B22300 <B22300@...escale.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	socketcan-core@...ts.berlios.de, netdev@...r.kernel.org,
	PPC list <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v11 4/5] powerpc: Add flexcan device support for p1010rdb.


On Aug 10, 2011, at 11:27 AM, Robin Holt wrote:

> I added a simple clock source for the p1010rdb so the flexcan driver
> could determine a clock frequency.  The p1010 flexcan device only has
> an oscillator of system bus frequency divided by 2.
> 
> 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/platforms/85xx/Kconfig    |    2 +
> arch/powerpc/platforms/85xx/Makefile   |    2 +
> arch/powerpc/platforms/85xx/clock.c    |   52 ++++++++++++++++++++++++++++++++
> arch/powerpc/platforms/85xx/p1010rdb.c |    8 +++++
> 4 files changed, 64 insertions(+), 0 deletions(-)
> create mode 100644 arch/powerpc/platforms/85xx/clock.c

I dont understand how mpc85xx_clk_functions() ends up being associated with the frequency the flexcan is running at.

This either seems to global or I'm missing something.

I still think the clk / freq info should be in the device tree and handled in the driver and NOT arch/powerpc platform code.

- k--
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