Re: [PATCH v2] cs5535-mfgpt: Add another reset method

[Stephen Rothwell]

Hi Richard,

On Tue,  2 Apr 2013 08:46:37 +0200 Richard Weinberger <richard@xxxxxx> wrote:
>
> The CS5535/CS5536 MFGPT has no support to reset the device.
> The current method uses an undocumented bit but does not work on all
> devices. At least on my ALIX board it completely freezes the board.
> 
> This new method tries to soft reset all timers by unconfiguring them.
> But this does not clear the RO setup register and therefore it has to
> be ignored while probing.
> 
> Resetting the timers is not only needed on broken BIOSes also when
> kexec is used. Otherwise the new kernel will find preconfigured timers
> and odd things will happen.
> 
> Signed-off-by: Richard Weinberger <richard@xxxxxx>
> ---
>  drivers/misc/cs5535-mfgpt.c | 41 +++++++++++++++++++++++++++++++++++++----
>  1 file changed, 37 insertions(+), 4 deletions(-)

Greg will probably want an incremental fix patch as he does not rewrite
his trees.

-- 
Cheers,
Stephen Rothwell                    sfr@xxxxxxxxxxxxxxxx

Attachment: pgp00000.pgp
Description: PGP signature