[PATCH 0/4] gpio: generic: add option to read output value from set register

[Vladimir Zapolskiy <vladimir_zapolskiy@xxxxxxxxxx>]

The changeset introduces BGPIOF_READ_OUTPUT_REG_SET flag to
bgpio_init() function, which is if provided allows to get
stored value of output GPIO line in "set" register instead
of default "data" register.

The same functionality is already implemented in moxart driver by
a private function, move it to gpio-generic.c since at least iMX
GPIO controllers require it as well.

Fixes a problem on iMX platforms:

  % echo out > /sys/class/gpio/gpio9/direction
  % cat /sys/class/gpio/gpio9/value
  0
  % echo 1 > /sys/class/gpio/gpio9/value
  % cat /sys/class/gpio/gpio9/value
  0

Vladimir Zapolskiy (4):
  Revert "gpio: generic: clamp retured value to [0,1]"
  gpio: gpio-generic: add flag to read out output value from reg_set
  gpio: moxart: get value of output gpio from generic driver
  gpio: mxc: read output value from GPIO_DR register

 drivers/gpio/gpio-generic.c     |   24 ++++++++++++++++++++----
 drivers/gpio/gpio-moxart.c      |   17 +++--------------
 drivers/gpio/gpio-mxc.c         |    3 ++-
 include/linux/basic_mmio_gpio.h |    1 +
 4 files changed, 26 insertions(+), 19 deletions(-)

-- 
1.7.10.4

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