In case disconnecting physical connection,
need to initialize i2c device for retry access.
This patch adds initialize process in case bus-idle fails and Lost arbitration.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Currently, in case occurring abnormal event,
internal flag variable(=pch_event_flag) is not reset.
This patch fixes the issue.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

add stop sequence in case wait-event timeout in write processing.
(read processing already had it)
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Error processing for NACK or wait-event must be precessed separately.
So divide wait-event error processing into NACK-receiving and timeout.
Add arbitration lost processing.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Reported-by: NJeffrey (Sheng-Hui) Chu <jeffchu@broadcom.com>
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Type of wait_event_timeout is long not s32.
This patch replaces s32 with long.
Additionally, delete negative processing(ret < 0).
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Currently, when checking whether bus is idle or not,
if timeout occurs,
this function always returns success(zero).
This patch fixes the issue.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

issue-1
In case combined transfer mode fails halfway, the processing must be stopped halfway.
However currently, the processing is continued.
This patch breaks the processing.

issue-2
Currently, pch_i2c_xfer returns read/write size at that time.
However pch_i2c_xfer must return the number of messages to be read/written.
This patch modifies correctly.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Currently, Combined R/W transfer mode is not supported.
This patch enables Combined R/W transfer mode.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Support new device OKI SEMICONDUCTOR ML7223 IOH(Input/Output Hub).
The ML7223 IOH is for MP(Media Phone) use.
The ML7223 is companion chip for Intel Atom E6xx series.
The ML7223 is completely compatible for Intel EG20T PCH.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Fixes (with v2.6.38-rc3/parisc/parisc-allmodconfig):
  src/drivers/i2c/busses/i2c-eg20t.c:720: error: implicit declaration of function 'kzalloc'
  src/drivers/i2c/busses/i2c-eg20t.c:790: error: implicit declaration of function 'kfree'
Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Cc: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Support new device OKI SEMICONDUCTOR ML7213 IOH.
The ML7213 which is for IVI(In-Vehicle Infotainment) is a companion
chip for the Atom E6xx series and compatible with the Intel EG20T
PCH.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

I2C driver for Intel EG20T PCH
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Reviewed-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NQi Wang <qi.wang@intel.com>
[ben-linux@fluff.org: reworded commit message]
Signed-off-by: NBen Dooks <ben-linux@fluff.org>