Hello,

Koskinen Aaro (Nokia-D/Helsinki) wrote:
> I'm afraid this patch needs more work. The optimized restoration of
> chconf can cause occasionally errors with off mode if multiple chip
> selects are in use. In practice it is needed to restore all CHxCONF
> registers, not just the one by a specific chip select.
> 
> ext Kevin Hilman wrote:
>> From: Hemanth V <hemanthv@ti.com>
>>
>> This patch adds context save/restore feature to McSPI driver.
>> This includes fixes by Aaro Koskinen
>>
>> Signed-off-by: Hemanth V <hemanthv@ti.com>
>> Reviewed-by: Aaro Koskinen <Aaro.Koskinen@nokia.com>
>> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
>> ---
>>  drivers/spi/omap2_mcspi.c |  134 +++++++++++++++++++++++++++++++++-----------
>>  1 files changed, 100 insertions(+), 34 deletions(-)

Here's a patch on top of PM branch that restores all the registers. This 
is basically the same what Jouni originally suggested 
(http://marc.info/?l=linux-omap&m=123366825525879&w=2).

A.