litmus-rt.git/drivers/i2c, branch wip-budget

Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging

2009-11-30T22:50:44+00:00

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  at24: Use timeout also for read
  i2c: Fix userspace_device list corruption
  MAINTAINERS: Add missing i2c files
  i2c/tsl2550: Fix lux value in extended mode

i2c: Fix userspace_device list corruption

2009-11-26T08:22:33+00:00

Fix userspace_device list corruption. The corruption was caused by
clients not being removed when adapters with such clients were
themselves removed. Something like the following would trigger it
(assuming i2c-stub gets adapter number 3):

# modprobe i2c-stub chip_addr=0x50
# echo 24c08 0x50 > /sys/bus/i2c/devices/i2c-3/new_device 
# rmmod i2c-stub
# modprobe i2c-stub chip_addr=0x50
# echo 24c08 0x50 > /sys/bus/i2c/devices/i2c-3/new_device 

For the records, the stack trace in the kernel logs look like this:

kernel: WARNING: at lib/list_debug.c:30 __list_add+0x8b/0x90()
kernel: Hardware name: (...)
kernel: list_add corruption. prev->next should be next (c137fc84), but was (null). (prev=f57111b8).
kernel: Modules linked in: (...)
kernel: Pid: 4669, comm: bash Not tainted 2.6.32-rc8 #259
kernel: Call Trace:
kernel:  [] ? __list_add+0x8b/0x90
kernel:  [] ? __list_add+0x8b/0x90
kernel:  [] warn_slowpath_common+0x6c/0xc0
kernel:  [] ? __list_add+0x8b/0x90
kernel:  [] warn_slowpath_fmt+0x26/0x30
kernel:  [] __list_add+0x8b/0x90
kernel:  [] i2c_sysfs_new_device+0x1c5/0x250
kernel:  [] ? might_fault+0x2e/0x80
kernel:  [] ? i2c_sysfs_new_device+0x0/0x250
kernel:  [] dev_attr_store+0x25/0x30
kernel:  [] sysfs_write_file+0x9c/0xf0
kernel:  [] vfs_write+0x9c/0x160
kernel:  [] ? sysfs_write_file+0x0/0xf0
kernel:  [] sys_write+0x3d/0x70
kernel:  [] sysenter_do_call+0x12/0x36

Signed-off-by: Jean Delvare

i2c/tsl2550: Fix lux value in extended mode

2009-11-26T08:22:32+00:00

According to the TAOS Application Note 'Controlling a Backlight with
the TSL2550 Ambient Light Sensor' (page 14), the actual lux value in
extended mode should be obtained multiplying the calculated lux value
by 5.

Signed-off-by: Michele Jr De Candia 
Signed-off-by: Jean Delvare

ARM: PNX4008: i2c-pnx: use the same dev_id for request_irq and free_irq

2009-11-21T19:01:05+00:00

This allows i2c-pnx to free its interrupt handler when the module
is removed or if an error occurs; using the same dev_id for both
request_irq and free_irq is desirable.

Signed-off-by: Russell King 
Acked-by: Ben Dooks

i2c: i2c-pnx: Added missing mach/i2c.h and linux/io.h header file includes

2009-11-20T00:25:42+00:00

Added missing mach/i2c.h and linux/io.h header file includes

Signed-off-by: Kevin Wells 
Signed-off-by: Ben Dooks

i2c: i2c-pnx: Limit minimum jiffie timeout to 2

2009-11-20T00:25:41+00:00

Limit minimum jiffie timeout to 2 to prevent early timeout on systems
with low tick rates

Signed-off-by: Kevin Wells 
Signed-off-by: Ben Dooks

i2c-piix4: Modify code name SB900 to Hudson-2

2009-11-07T12:10:46+00:00

Change SB900 to its formal code name Hudson-2.

Signed-off-by: Crane Cai 
Signed-off-by: Jean Delvare

i2c-mpc: Do not generate STOP after read.

2009-11-02T23:28:47+00:00

The driver always ends a read with a STOP condition which
breaks subsequent I2C reads/writes in the same transaction as
these expect to do a repeated START(ReSTART).

This will also help I2C multimaster as the bus will not be released
after the first read, but when the whole transaction ends.

Signed-off-by: Joakim Tjernlund 
Signed-off-by: Ben Dooks

i2c: imx: disable clock when it's possible to save power.

2009-11-02T23:28:47+00:00

Enable clock before START, disable it after STOP.

Signed-off-by: Richard Zhao 
Signed-off-by: Ben Dooks

i2c: imx: only imx1 needs disable delay

2009-11-02T23:28:47+00:00

check cpu_is_mx1() when disable delay.

Signed-off-by: Richard Zhao 
Signed-off-by: Ben Dooks