[PATCH v3 0/7] i2c: img-scb: fixes to support i2c on pistachio

[Sifan Naeem <sifan.naeem-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>]

The following patches are required to fix the existing driver to
support i2c on pistachio.

Tested on Pistachio bub using an Adafruit I2C Non-Volatile FRAM Breakout
(256Kbit / 32KByte) eeprom.

Used i2c buildroot tools to test the eeprom and the other i2c blocks.
Also used dd commands to copy data to and then to dump data from the
eeprom. i2ctransfer was used to test repeated starts and verified
using a scope.

Odeally these fixes should go in to Stable kernel (v3.19+).

Changes from v2:
	5/7: Remove start bit detected not required, use line_status instead of i2c->line_status
	7/7: use %u instead if %d for unsigned

Sifan Naeem (7):
  i2c: img-scb: enable fencing for all versions of the ip
  i2c: img-scb: do dummy writes before fifo access
  i2c: img-scb: use DIV_ROUND_UP to round divisor values
  i2c: img-scb: fix LOW and HIGH period values for the SCL clock
  i2c: img-scb: use line_status instead of i2c->line_status
  i2c: img-scb: Clear line and interrupt status before starting a
    transfer
  i2c: img-scb: verify support for requested bit rate

 drivers/i2c/busses/i2c-img-scb.c |   73 ++++++++++++++++++++++----------------
 1 file changed, 43 insertions(+), 30 deletions(-)

-- 
1.7.9.5