From 77a775b7ccaf86b0bb67ceaaf3b6d2720e12b506 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 10 Aug 2015 11:51:46 +0200 Subject: gpio/ABI: document what is already the case MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 926b663ce8215ba448960e1ff6e58b67a2c3b99b "gpiolib: allow GPIOs to be named" added the ability to name GPIO lines by an array of names stored in the GPIO chip. This was in 2009 and has been an ABI since. Let's document it properly. Cc: Daniel Silverstone Cc: Markus Pargmann Cc: Johan Hovold Cc: Uwe Kleine-König Signed-off-by: Linus Walleij --- Documentation/ABI/testing/sysfs-gpio | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-gpio b/Documentation/ABI/testing/sysfs-gpio index 80f4c94c7bef..55ffa2df1c10 100644 --- a/Documentation/ABI/testing/sysfs-gpio +++ b/Documentation/ABI/testing/sysfs-gpio @@ -16,7 +16,8 @@ Description: /sys/class/gpio /export ... asks the kernel to export a GPIO to userspace /unexport ... to return a GPIO to the kernel - /gpioN ... for each exported GPIO #N + /gpioN ... for each exported GPIO #N OR + / ... for a properly named GPIO line /value ... always readable, writes fail for input GPIOs /direction ... r/w as: in, out (default low); write: high, low /edge ... r/w as: none, falling, rising, both -- cgit v1.2.1