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| author | Simon Glass <sjg@chromium.org> | 2014-02-26 15:59:27 -0700 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-03-04 12:15:30 -0500 |
| commit | f9aa6a1086f6b7da1814a2c95feefa91c9c4b593 (patch) | |
| tree | afc79b7da6aa52de764ed53bf6b4c3a63a03b0df /doc/driver-model/UDM-keyboard.txt | |
| parent | 95a260a98c010321cdc5f2acd1f4272b9c0a19dc (diff) | |
| download | u-boot-imx-f9aa6a1086f6b7da1814a2c95feefa91c9c4b593.zip u-boot-imx-f9aa6a1086f6b7da1814a2c95feefa91c9c4b593.tar.gz u-boot-imx-f9aa6a1086f6b7da1814a2c95feefa91c9c4b593.tar.bz2 | |
dm: Remove old driver model documentation
This documentation pertains to the planned implementation of driver model
in U-Boot for each subsystem, but it has not been superseded. It is
probably better to have this documentation in the source code for each
subsystem where possible, so that docbook will pick it up. Where this does
not make sense, new documentation can be placed in some suitable file in
doc/driver-model.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc/driver-model/UDM-keyboard.txt')
| -rw-r--r-- | doc/driver-model/UDM-keyboard.txt | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/doc/driver-model/UDM-keyboard.txt b/doc/driver-model/UDM-keyboard.txt deleted file mode 100644 index 5babfc5..0000000 --- a/doc/driver-model/UDM-keyboard.txt +++ /dev/null @@ -1,47 +0,0 @@ -The U-Boot Driver Model Project -=============================== -Keyboard input analysis -======================= -Marek Vasut <marek.vasut@gmail.com> -2012-02-20 - -I) Overview ------------ - -The keyboard drivers are most often registered with STDIO subsystem. There are -components of the keyboard drivers though, which operate in severe ad-hoc -manner, often being related to interrupt-driven keypress reception. This -components will require the most sanitization of all parts of keyboard input -subsystem. - -Otherwise, the keyboard is no different from other standard input but with the -necessity to decode scancodes. These are decoded using tables provided by -keyboard drivers. These tables are often driver specific. - -II) Approach ------------- - -The most problematic part is the interrupt driven keypress reception. For this, -the buffers that are currently shared throughout the whole U-Boot would need to -be converted into driver's private data. - -III) Analysis of in-tree drivers --------------------------------- - - board/mpl/common/kbd.c - ---------------------- - This driver is a classic STDIO driver, no problem with conversion is expected. - Only necessary change will be to move this driver to a proper location. - - board/rbc823/kbd.c - ------------------ - This driver is a classic STDIO driver, no problem with conversion is expected. - Only necessary change will be to move this driver to a proper location. - - drivers/input/keyboard.c - ------------------------ - This driver is special in many ways. Firstly because this is a universal stub - driver for converting scancodes from i8042 and the likes. Secondly because the - buffer is filled by various other ad-hoc implementations of keyboard input by - using this buffer as an extern. This will need to be fixed by allowing drivers - to pass certain routines to this driver via platform data. |