linux-kernel - Re: [PATCH v4] ARM: kirkwood: retain MAC address for DT ethernet

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Date:	Tue, 8 Oct 2013 13:03:08 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Andrew Lunn <andrew@...n.ch>,
	Russell King <linux@....linux.org.uk>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linux-kernel@...r.kernel.org,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Grant Likely <grant.likely@...aro.org>,
	Mike Turquette <mturquette@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4] ARM: kirkwood: retain MAC address for DT ethernet

On Mon, Oct 07, 2013 at 10:25:11PM +0200, Sebastian Hesselbarth wrote:
> Ethernet IP on Kirkwood SoCs loose their MAC address register content
> if clock gated. To allow modular ethernet driver setups and gated clocks
> also on non-DT capable bootloaders, we fixup port device nodes with no
> valid MAC address property. This patch copies MAC address register
> contents set up by bootloaders early, notably before ethernet clocks
> are gated. While at it, also reorder call sequence in _dt_init.
> 
> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
> Reviewed-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
> Reviewed-by: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
> Tested-by: Andrew Lunn <andrew@...n.ch>
> ---
> Just to make sure they don't get lost this time:
> Added Jason's and Ezequiel's Reviewed-by to honor their constant reviews,
> and Andrew's last Tested-by because I know he will be testing again.
> 
> Changelog:
> v3->v4:
> - drop clk_is_enabled (and dependency) due to possible abuse of the
>   new function; enable/disable clk instead, remove gated clock warning
>   (Suggested by Andrew Lunn, Uwe Kleine-Koenig, Mike Turquette)
> - reduce FW_BUG to FW_INFO (Suggested by Andrew Lunn)
> - proper cleanup of iomap, clk, nodes
> v2->v3:
> - make use of new public clk_is_enabled (adds dependency)
> - add warning about gated clock && missing MAC property
>   (Suggested by Jason Gunthorpe)
> v1->v2:
> - check for gated clock before accessing eth registers
>   (Suggested by Andrew Lunn)
> 
> Cc: Jason Cooper <jason@...edaemon.net>
> Cc: Andrew Lunn <andrew@...n.ch>
> Cc: Russell King <linux@....linux.org.uk>
> Cc: Grant Likely <grant.likely@...aro.org>
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Cc: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
> Cc: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
> Cc: Mike Turquette <mturquette@...aro.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> ---
>  arch/arm/mach-kirkwood/board-dt.c |   86 +++++++++++++++++++++++++++++++++++--
>  1 file changed, 83 insertions(+), 3 deletions(-)

Applied to mvebu/soc with Mike's Reviewed-by:

thx,

Jason.
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