linux-stable.git/drivers/w1, branch v3.14

drivers/w1/masters/w1-gpio.c: add strong pullup emulation

2014-01-24T00:37:04+00:00

Strong pullup is emulated by driving pin logic high after write command
when using tri-state push-pull GPIO.

Signed-off-by: Evgeny Boger 
Cc: Greg KH 
Acked-by: David Fries 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

w1: mxc_w1: Check the clk_prepare_enable() return value

2013-12-09T06:41:48+00:00

Signed-off-by: Alexander Shiyan 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Greg Kroah-Hartman

w1: mxc_w1: Add warning for base frequency calculation

2013-12-09T06:41:48+00:00

Base frequency should be as close as possible to 1 MHz. This patch
adds warnings when clock is unreliable, according to i.MX datasheet.

Signed-off-by: Alexander Shiyan 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Greg Kroah-Hartman

w1: mxc_w1: Remove unused field "clkdiv" from private structure

2013-12-09T06:41:48+00:00

Private field "clkdiv" is not used outside "probe", so there are
no reason to keep it in driver.

Signed-off-by: Alexander Shiyan 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Greg Kroah-Hartman

drivers/w1/masters/w1-gpio.c: use dev_get_platdata()

2013-11-15T00:32:21+00:00

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.  This is a cosmetic change to make
the code simpler and enhance the readability.

Signed-off-by: Jingoo Han 
Acked-by: Evgeniy Polyakov 
Cc: Greg KH 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers: w1: make w1_slave::flags long to avoid memory corruption

2013-11-13T03:09:35+00:00

On architectures where long is more then 32 bits, modifying a 32-bit field
with set_bit (and other atomic bit operations) may cause bytes following
the field to by modified.

Because the endianness of the bits within a field is the native endianness
of the CPU[1], on big-endian machines, bit number zero is in the last byte
of the field.

Therefore, `set_bit(0, ptr)' on a 64-bit big-endian machine is roughly
equivalent to `((char *)ptr)[7] |= 1', and since w1 driver uses a 32-bit
field for holding the flags, this causes bytes beyond the field to be
modified.

[1] From Documentation/atomic_ops.txt:

    Native atomic bit operations are defined to operate on objects
    aligned to the size of an "unsigned long" C data type, and are
    least of that size.  The endianness of the bits within each
    "unsigned long" are the native endianness of the cpu.

Signed-off-by: Michal Nazarewicz 
Cc: Evgeniy Polyakov 
Cc: Greg KH 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/w1/masters/ds1wm.cuse dev_get_platdata()

2013-11-13T03:09:35+00:00

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.  This is a cosmetic change to make
the code simpler and enhance the readability.

Signed-off-by: Jingoo Han 
Acked-by: Evgeniy Polyakov 
Cc: Greg KH 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

w1-gpio: Use devm_* functions

2013-10-29T23:58:18+00:00

Signed-off-by: Markus Pargmann 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Greg Kroah-Hartman

w1-gpio: Detect of_gpio_error for first gpio

2013-10-29T23:58:18+00:00

The first DT gpio is necessary for this driver, but errors returned for
of_get_gpio are ignored.

This patch adds a return value check for the first of_get_gpio.

Signed-off-by: Markus Pargmann 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Greg Kroah-Hartman

Merge 3.12-rc6 into char-misc-next

2013-10-19T20:02:47+00:00

We want the fixes in here as well.

Signed-off-by: Greg Kroah-Hartman