These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / gpio / gpio-legacy.txt

diff --git a/kernel/Documentation/gpio/gpio-legacy.txt b/kernel/Documentation/gpio/gpio-legacy.txt
index 6f83fa9..79ab564 100644 (file)
--- a/kernel/Documentation/gpio/gpio-legacy.txt
+++ b/kernel/Documentation/gpio/gpio-legacy.txt
@@ -751,9 +751,6 @@ requested using gpio_request():
        int gpio_export_link(struct device *dev, const char *name,
                unsigned gpio)
 
-       /* change the polarity of a GPIO node in sysfs */
-       int gpio_sysfs_set_active_low(unsigned gpio, int value);
-
 After a kernel driver requests a GPIO, it may only be made available in
 the sysfs interface by gpio_export().  The driver can control whether the
 signal direction may change.  This helps drivers prevent userspace code
@@ -767,9 +764,3 @@ After the GPIO has been exported, gpio_export_link() allows creating
 symlinks from elsewhere in sysfs to the GPIO sysfs node.  Drivers can
 use this to provide the interface under their own device in sysfs with
 a descriptive name.
-
-Drivers can use gpio_sysfs_set_active_low() to hide GPIO line polarity
-differences between boards from user space.  This only affects the
-sysfs interface.  Polarity change can be done both before and after
-gpio_export(), and previously enabled poll(2) support for either
-rising or falling edge will be reconfigured to follow this setting.