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  1. 02 10月, 2015 10 次提交
  3. 25 9月, 2015 6 次提交
    • L
      gpio: keep the GPIO line names internal · f881bab0
      由 Linus Walleij 提交于 
      This refactors the changes to the GPIO line naming mechanism to
not have so widespread effects, instead we conclude the patch series
by having created a name attribute in the GPIO descriptor, that need
not be globally unique, and it will be initialized from the old
.names array in struct gpio_chip if it exists, then used in the legacy
sysfs code like the array was used previously.

The associated changes to name lines from the device tree are
controversial and need to stand alone from this. Resulting changes:

1. Remove the export and the header for the gpio_name_to_desc() as so
far the only use is inside gpiolib.c. Staticize gpio_name_to_desc()
and move it above the only function using it.

2. Only print a warning if there are two GPIO lines with the same name.
The reason is to preserve current behaviour: before the previous
changes to the naming mechanism this would not reject probing the
driver, instead the error would occur when trying to export the line
in sysfs, so restore this behaviour, but print a friendly warning
if names collide.

Cc: Johan Hovold <johan@kernel.org>
Cc: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      f881bab0
    • M
      gpiolib: Add gpio name information to /sys/kernel/debug/gpio · ced433e2
      由 Markus Pargmann 提交于 
      Add some information about gpio names to the debugfs gpio file. name and
label of a GPIO are then displayed next to each other. This way it is
easy to see what the real name of GPIO is and what the driver requested
it for.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
[Dropped unsolicited sysfs ABI patch hunk]
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      ced433e2
    • M
      gpio-sysfs: Use gpio descriptor name instead of gpiochip names array · ddd54040
      由 Markus Pargmann 提交于 
      The name is now stored in the gpio descriptor as well, for example to
allow to store names from DT. This patch changes the sysfs gpio files
to use the gpio descriptor name.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      ddd54040
    • M
      gpiolib: Use GPIO name from names array for gpio descriptor · 5f3ca732
      由 Markus Pargmann 提交于 
      This patch adds GPIO names to the GPIO descriptors when initializing the
gpiochip. It also introduces a check whether any of the new names will
conflict with an existing GPIO name.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      5f3ca732
    • M
      gpio: Introduce gpio descriptor 'name' · c0017ed7
      由 Markus Pargmann 提交于 
      The latest gpio hogging mechanism assigns each gpio a 'line-name' in the
devicetree. The 'name' field is different from the 'label' field.
'label' is only used for requested GPIOs to describe its current use by
driver or userspace.

The 'name' field describes the GPIO itself, not the use. This is most
likely identical to the label in the schematic on the GPIO line and
should help to find this particular GPIO.

This is equivalent to the gpiochip->names array. However names should be
stored in the GPIO descriptor. We will use gpiochip->names in the future
only as initializer for the GPIO descriptors for drivers that assign
GPIO names hardcoded. All other GPIO names will be parsed from DT and
directly assigned to the GPIO descriptor.

This patch adds a helper function to find gpio descriptors by name
instead of gpio number.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      c0017ed7
    • M
      gpiolib-of: Rename gpio_hog functions to be generic · fd7337fd
      由 Markus Pargmann 提交于 
      The gpio hogging functions are currently only used for gpio-hogging. But
these functions are widely generic ones which parse gpio device nodes in
the DT.
Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      fd7337fd
  5. 18 9月, 2015 12 次提交
  7. 17 9月, 2015 12 次提交