Hi Wolfram, On Thu, Nov 02, 2017 at 01:47:26PM +0100, Wolfram Sang wrote: > When clearing the ICE bit, all registers fall back to their defaut value. That > allows for some simplifications in the code. > > Tested on a Renesas Lager board (R-Car H2) doing a bunch of consecutive > commands. No spurious interrupts have been observed and the signals look > exactly the same when visualized with sigrok. > > According to the docs, the ICE bit behaviour is the same since the beginning of > this driver (sh7722) for the migo-r board. > > jacopo: can you please test this series while you work on migo-r anyhow? Thank > you a ton for that! I have applied your series on top of my developments on Migo-R ------------------------------------------------------------ 57d007c i2c: sh_mobile: shorten exit of xfer routine 67dfa18 i2c: sh_mobile: use direct writes when accessing ICE bit f44a2df i2c: sh_mobile: manually "inline" two short functions 5d656b6 i2c: sh_mobile: remove redundant deinitialization 9d2b8cc i2c: sh_mobile: remove redundant initialization cac9723 arch: sh: migor: Use new CEU camera driver ... ------------------------------------------------------------ And I can successfully probe the camera sensor ------------------------------------------------------------ i2c i2c-0: master_xfer[0] W, addr=0x21, len=1 i2c i2c-0: master_xfer[1] R, addr=0x21, len=1 i2c i2c-0: master_xfer[0] W, addr=0x21, len=1 i2c i2c-0: master_xfer[1] R, addr=0x21, len=1 i2c i2c-0: master_xfer[0] W, addr=0x21, len=1 i2c i2c-0: master_xfer[1] R, addr=0x21, len=1 i2c i2c-0: master_xfer[0] W, addr=0x21, len=1 i2c i2c-0: master_xfer[1] R, addr=0x21, len=1 ov772x 0-0021: ov7725 Product ID 77:21 Manufacturer ID 7f:a2 ------------------------------------------------------------ As well as set format on it without noticeable errors ------------------------------------------------------------ i2c i2c-0: master_xfer[0] W, addr=0x21, len=1 i2c i2c-0: master_xfer[1] R, addr=0x21, len=1 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=1 i2c i2c-0: master_xfer[1] R, addr=0x21, len=1 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 i2c i2c-0: master_xfer[0] W, addr=0x21, len=2 ------------------------------------------------------------ I cannot try capture, as I currently have issues with mmap on SH4 :( If you want me to run some specific tests, let me know. Otherwise you can add my Tested-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx> Cheers! j > > Looking forward to other comments, as well... > > > Wolfram Sang (5): > i2c: sh_mobile: remove redundant initialization > i2c: sh_mobile: remove redundant deinitialization > i2c: sh_mobile: manually "inline" two short functions > i2c: sh_mobile: use direct writes when accessing ICE bit > i2c: sh_mobile: shorten exit of xfer routine > > drivers/i2c/busses/i2c-sh_mobile.c | 50 +++++++++----------------------------- > 1 file changed, 12 insertions(+), 38 deletions(-) > > -- > 2.11.0 >
