linux.git/drivers/i2c, branch v3.12-rc2

Remove GENERIC_HARDIRQ config option

2013-09-13T13:09:52+00:00

After the last architecture switched to generic hard irqs the config
options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code
for !CONFIG_GENERIC_HARDIRQS can be removed.

Signed-off-by: Martin Schwidefsky

i2c: davinci: Fix bad dev_get_platdata() conversion

2013-09-10T21:23:20+00:00

commit 6d4028c644e (i2c: use dev_get_platdata()) did a bad conversion
of this one case:

  drivers/i2c/busses/i2c-davinci.c: In function 'davinci_i2c_probe':
  drivers/i2c/busses/i2c-davinci.c:665:2: warning: passing argument 1 of
	'dev_get_platdata' from incompatible pointer type [enabled by default]

Reviewed-by: Jingoo Han 
Acked-by: Wolfram Sang 
Signed-off-by: Olof Johansson

i2c: rcar: add rcar-H2 support

2013-09-04T10:49:16+00:00

This patch modify I2C driver of rcar-H1 to usable on both rcar-H1 and rcar-H2.

Signed-off-by: Nguyen Viet Dung 
Signed-off-by: Wolfram Sang

i2c: sirf: retry 3 times as sometimes we get random noack and timeout

2013-08-28T09:46:03+00:00

let i2c core retry 3 times as sometimes we get random noack and timeout
even when we access an existing i2c client.

Signed-off-by: Zhiwu Song 
Signed-off-by: Barry Song 
Signed-off-by: Wolfram Sang

i2c: sirf: support reverse direction of address

2013-08-28T09:45:59+00:00

if users set I2C_M_REV_DIR_ADDR, revert the direction of address.

Signed-off-by: Zhiwu Song 
Signed-off-by: Rongjun Ying 
Signed-off-by: Barry Song 
Signed-off-by: Wolfram Sang

i2c: sirf: fix the typo for setting bitrate to less than 100k

2013-08-28T09:44:32+00:00

there is a typo before, it makes the final bitrate wrong, this patch fixes
it.

Signed-off-by: Zhiwu Song 
Signed-off-by: Barry Song 
Signed-off-by: Wolfram Sang

i2c: sirf: we need to wait I2C_RESET status in resume

2013-08-28T09:44:03+00:00

this fixes the issue that we lost to wait the i2c reset finished.

Signed-off-by: Zhiwu Song 
Signed-off-by: Barry Song 
Signed-off-by: Wolfram Sang

i2c: sirf: reset i2c controller early after we get a noack

2013-08-28T09:43:34+00:00

Due to hardware ANOMALY, we need to reset I2C earlier after
we get NOACK while accessing non-existing clients, otherwise
we will get errors even we access existing clients later

Signed-off-by: Zhiwu Song 
Signed-off-by: Barry Song 
Signed-off-by: Wolfram Sang

i2c: designware: get SDA hold time, HCNT and LCNT configuration from ACPI

2013-08-28T09:11:17+00:00

Some Intel LPSS I2C devices make the SDA hold time and *CNT parameters
available via SSCN (standard mode) and FMCN (fast mode) ACPI methods.

Implement support for this so that we check whether an ACPI method exists
and if it does, fill in the SDA hold time and *CNT values to the device
private structure for core to use.

Signed-off-by: Mika Westerberg 
Signed-off-by: Wolfram Sang

i2c: designware: make HCNT/LCNT values configurable

2013-08-28T09:11:10+00:00

The DesignWare I2C controller has high count (HCNT) and low count (LCNT)
registers for each of the I2C speed modes (standard and fast). These
registers are programmed based on the input clock speed in the driver.

The current code calculates these values based on the input clock speed and
tries hard to meet the I2C bus timing requirements. This could result
non-optimal values with regarding to the bus speed. For example on Intel
BayTrail we get bus speed of 315.41kHz which is ~20% slower than we would
expect (400kHz) in fast mode (even though the timing requirements are met).

This patch makes it possible for the platform code to pass more optimal
HCNT/LCNT values to the core driver if they are known beforehand. If these
are not set we use the calculated and more conservative values.

Signed-off-by: Mika Westerberg 
Acked-by: Shinya Kuribayashi 
Signed-off-by: Wolfram Sang