i2c-s3c2410: Drop unused define

Use standard of_match_ptr() to avoid defining variable unused
in non device tree builds.

Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-pxa: Drop leftover comment

Commit 488bf314b ("i2c: Allow i2c_add_numbered_adapter() to assign a
bus id") reworked i2c-pxa driver leaving obsolete comment.

This commit simply drops it.

Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: Dynamically assign adapter id if it wasn't explictly specified

Commit 488bf314b ("i2c: Allow i2c_add_numbered_adapter() to assign a
bus id") reworked i2c_add_numbered_adapter() to call i2c_add_adapter()
if requested bus was -1.

This allows to simplify driver's initialization procedure by using
just one function for static and dynamic adapter id registration.

This patch updates few more drivers (missed out in original patch)
to use this functionality.

Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: designware: Add support for 16bit register access

The STM SPEAr platform can only access the i2c controller register
via 16bit read/write functions. This patch adds support to
automatically detect this 16bit access mode.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-pnx.c: Use resources in platforms

As a precondition for device tree conversion, the platforms using i2c-pnx.c are
converted to using mem and irq resources instead of platform data.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-pnx.c: Remove duplicated i2c.h

The platforms using i2c-pnx.c both defined a duplicated i2c.h (used nowhere
else). This patch removes those and integrates the contents into the driver
itself.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: sh_mobile: add device tree support

This patch enables DT support for the IIC driver
used on SH-based SoCs such as sh7722 and sh7724
among others as well as SH-Mobile SoCs such as
sh7367, sh7377, sh7372, sh73a0 and r8a7740.

Tested with out-of-tree DT support code on the
sh7372 Mackerel board.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-mpc: avoid I2C abnormal after resuming from deep sleep

When entering deep sleep, the value in the registers I2CFDR and
I2CDFSRR are lost. This causes I2C access to fail after resuming.

Add suspend/resume routines to save/restore the registers
I2CFDR and I2CDFSRR.

Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-eg20t: Call init() when wait-event timeout occurs

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-eg20t: add helper function for xfer check

Currently, there are the same code for xfer complete check processing.
So, I add helper function pch_i2c_wait_for_check_xfer.

Reported-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c-eg20t: Merge two functions

By previous patch, pch_i2c_wait_for_xfer_complete can be merged
to pch_i2c_wait_for_check_xfer.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: eg20t: use NULL instead of 0

sparse rightfully says:
drivers/i2c/busses/i2c-eg20t.c:990:59: warning: Using plain integer as NULL pointer

Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>
i2c: eg20t: pass on return value in i2c_xfer

smatch says:
drivers/i2c/busses/i2c-eg20t.c:702 pch_i2c_xfer() info: why not propagate 'ret' from mutex_lock_interruptible() instead of -512?

which is especially true since for -ENORESTARTSYS it is said in
linux/errno.h "signal_pending() MUST be set" which is not done here. So
just pass on the return value we got.

Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>
i2c: eg20t: remove unused function

cppcheck rightfully says:
drivers/i2c/busses/i2c-eg20t.c:266: style: The function 'ktime_lt' is never used

Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>
i2c: eg20t: don't use strcpy but strlcpy

Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
Cc: Tomoya MORINAGA <tomoya.rohm@gmail.com>
i2c: imx: don't use strcpy but strlcpy

Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
i2c: pnx: add device tree support

This patch adds device tree support to the pnx-i2c driver by using platform
resources for memory region and irq and removing dependency on mach includes.

The following platforms are affected:

* PNX
* LPC31xx (WIP)
* LPC32xx

The patch is based on a patch by Jon Smirl, working on lpc31xx integration

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: ixp2000: remove driver

The platform is removed, so there are no users of this driver.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: designware: add PM support

This patch adds in support for standby/S2R/hybernate for i2c-designware driver.

Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
i2c: designware: Add clk_{un}prepare() support

clk_{un}prepare is mandatory for platforms using common clock framework. Since
this driver is used by SPEAr platform, which supports common clock framework,
add clk_{un}prepare() support for designware i2c.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>