From 143b65d677a59764e438d457bf2510b3fa5b90f8 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 16 Feb 2016 15:41:42 +0100 Subject: 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 Cc: Nicolas Saenz Julienne Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'drivers/gpio/gpiolib.c') 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 -- cgit v1.2.3-59-g8ed1b