diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2016-02-16 15:41:42 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-02-16 15:41:42 +0100 |
| commit | 143b65d677a59764e438d457bf2510b3fa5b90f8 (patch) | |
| tree | 586c063e5cf8960fe39b481436a26f961f7fb44f /drivers/gpio/gpiolib.c | |
| parent | gpio: davinci: Fix possible NULL pointer deference (diff) | |
| download | linux-143b65d677a59764e438d457bf2510b3fa5b90f8.tar.xz linux-143b65d677a59764e438d457bf2510b3fa5b90f8.zip | |
gpio: create an API to detect open drain/source on lines
My left hand merges code to privatize the descriptor handling
while my right hand merges drivers that poke around and
disrespect with the same gpiolib internals.
So let's expose the proper APIs for drivers to ask the gpiolib
core if a line is marked as open drain or open source and
get some order around things so this driver compiles again.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Nicolas Saenz Julienne <nicolassaenzj@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpiolib.c')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index aa4a60e19339..d8511cd68e7b 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1901,6 +1901,24 @@ bool gpiochip_line_is_irq(struct gpio_chip *chip, unsigned int offset) } EXPORT_SYMBOL_GPL(gpiochip_line_is_irq); +bool gpiochip_line_is_open_drain(struct gpio_chip *chip, unsigned int offset) +{ + if (offset >= chip->ngpio) + return false; + + return test_bit(FLAG_OPEN_DRAIN, &chip->gpiodev->descs[offset].flags); +} +EXPORT_SYMBOL_GPL(gpiochip_line_is_open_drain); + +bool gpiochip_line_is_open_source(struct gpio_chip *chip, unsigned int offset) +{ + if (offset >= chip->ngpio) + return false; + + return test_bit(FLAG_OPEN_SOURCE, &chip->gpiodev->descs[offset].flags); +} +EXPORT_SYMBOL_GPL(gpiochip_line_is_open_source); + /** * gpiod_get_raw_value_cansleep() - return a gpio's raw value * @desc: gpio whose value will be returned |