Enable clock before START, disable it after STOP.
Signed-off-by: NRichard Zhao <linuxzsc@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

check cpu_is_mx1() when disable delay.
Signed-off-by: NRichard Zhao <linuxzsc@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

The controller can't do anything else before it actually generates START/STOP.
So we check busy bit to make sure START/STOP is successfully finished.

If we don't check busy bit, START/STOP may fail on some fast CPUs.
Signed-off-by: NRichard Zhao <linuxzsc@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

As I2C is used by PMICs also, make the busses available early via
subsys_initcall().
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

'disable_delay' was static which is wrong as it is calculated using the per-device
bus speed. This patch turns 'disable_delay' into a per-device variable.
Reported-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NDarius Augulis <augulis.darius@gmail.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Signed-off-by: NDarius Augulis <augulis.darius@gmail.com>
[ben-linux@fluff.org: fix minor patch fault in remove]
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Implementation of I2C Adapter/Algorithm Driver for I2C Bus integrated
in Freescale's i.MX/MXC processors.
Signed-off-by: NDarius Augulis <augulis.darius@gmail.com>
Tested-by: NSascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>