diff options
Diffstat (limited to 'Documentation/blackfin')
| -rw-r--r-- | Documentation/blackfin/00-INDEX | 6 | ||||
| -rw-r--r-- | Documentation/blackfin/bfin-gpio-notes.txt | 4 | ||||
| -rw-r--r-- | Documentation/blackfin/bfin-spi-notes.txt | 2 |
3 files changed, 8 insertions, 4 deletions
diff --git a/Documentation/blackfin/00-INDEX b/Documentation/blackfin/00-INDEX index 2df0365f2df..c54fcdd4ae9 100644 --- a/Documentation/blackfin/00-INDEX +++ b/Documentation/blackfin/00-INDEX @@ -1,8 +1,10 @@ 00-INDEX - This file - +Makefile + - Makefile for gptimers example file. bfin-gpio-notes.txt - Notes in developing/using bfin-gpio driver. - bfin-spi-notes.txt - Notes for using bfin spi bus driver. +gptimers-example.c + - gptimers example diff --git a/Documentation/blackfin/bfin-gpio-notes.txt b/Documentation/blackfin/bfin-gpio-notes.txt index f731c1e5647..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: * @@ -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 diff --git a/Documentation/blackfin/bfin-spi-notes.txt b/Documentation/blackfin/bfin-spi-notes.txt index 556fa877f2e..eae6eaf2a09 100644 --- a/Documentation/blackfin/bfin-spi-notes.txt +++ b/Documentation/blackfin/bfin-spi-notes.txt @@ -9,6 +9,8 @@ the entire SPI transfer. - And not just bits_per_word duration. In most cases you can utilize SPI MODE_3 instead of MODE_0 to work-around this behavior. If your SPI slave device in question requires SPI MODE_0 or MODE_2 timing, you can utilize the GPIO controlled SPI Slave Select option instead. +In this case, you should use GPIO based CS for all of your slaves and not just +the ones using mode 0 or 2 in order to guarantee correct CS toggling behavior. You can even use the same pin whose peripheral role is a SSEL, but use it as a GPIO instead. |