diff options
Diffstat (limited to 'Documentation/blackfin/bfin-gpio-notes.txt')
| -rw-r--r-- | Documentation/blackfin/bfin-gpio-notes.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/blackfin/bfin-gpio-notes.txt b/Documentation/blackfin/bfin-gpio-notes.txt index 9898c7ded7d..d245f39c3d0 100644 --- a/Documentation/blackfin/bfin-gpio-notes.txt +++ b/Documentation/blackfin/bfin-gpio-notes.txt @@ -1,5 +1,5 @@ /* - * File: Documentation/blackfin/bfin-gpio-note.txt + * File: Documentation/blackfin/bfin-gpio-notes.txt * Based on: * Author: * @@ -43,7 +43,7 @@ void bfin_gpio_irq_free(unsigned gpio); The request functions will record the function state for a certain pin, - the free functions will clear it's function state. + the free functions will clear its function state. Once a pin is requested, it can't be requested again before it is freed by previous caller, otherwise kernel will dump stacks, and the request function fail. @@ -53,7 +53,7 @@ 3. But there are some exceptions - Kernel permit the identical GPIO be requested both as GPIO and GPIO - interrut. + interrupt. Some drivers, like gpio-keys, need this behavior. Kernel only print out warning messages like, bfin-gpio: GPIO 24 is already reserved by gpio-keys: BTN0, and you are |