Hi,

On Tue, Sep 11, 2012 at 03:48:34PM +0530, Shubhrajyoti wrote:

On Tuesday 11 September 2012 03:11 PM, Shubhrajyoti D wrote:

quoted

Changes since v1:
       - removed tabification on patch 6/17
       - removed dev_err() which was introduced on patch 09/17
Changes since v2:
        - do not set full fifo depth in the RDR interrupt.
        - some changelog updates.
        - rebase to the Wolfram's tree.
Changes since v3:
        - Remove a redundant read of status register
        - Read the dev->buf_len variable instead of the register
        as the information of the remaining bytes is there.
Changes since v4:
        - Ack the arbitration lost.
        - Rebase to the i2c-embedded/for-next branch.
Changes since v5:
        - Rebase to latest mainline
        - Added some more cleanup patches so as have a consolidated series.
Changes since v6:
        - Fix comments on setting the pdev to NULL.
        - Trivial changelog update

Previous discussions can be found here 
http://www.spinics.net/lists/linux-i2c/msg09482.html

Also this gives better performance
With the patches:

 Performance counter stats for '/build/i2c/bin/i2cdump -y -f 1 0x48
b':        
                                                                               

         78.796376 task-clock                #    0.453 CPUs
utilized          
               516 context-switches          #    0.007
M/sec                  
                 0 CPU-migrations            #    0.000
K/sec                  
               114 page-faults               #    0.001 M/sec  

      0.174011183 seconds time elapsed  

Without the patches
 Performance counter stats for '/build/i2c/bin/i2cdump -y -f 1 0x48
b':        
                                                                               

        123.504640 task-clock                #    0.049 CPUs
utilized          
               337 context-switches          #    0.003
M/sec                  
                 0 CPU-migrations            #    0.000
K/sec                  
               144 page-faults               #    0.001
M/sec                  
                              
                                                                               

       2.534424040 seconds time elapsed 

The auto suspend is probably the one  :-)

Awesome, I didn't go as far as checking performance counters :-)

-- 
balbi
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 836 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20120911/796b2d06/attachment-0001.sig>