[ARM] MINI2440: Document the mini2440= kernel parameter
Michel Pollet [Wed, 20 May 2009 10:10:31 +0000 (11:10 +0100)]
Also explains why the touchscreen support is not present,
and were to find a working one...

Signed-off-by: Michel Pollet <buserror@gmail.com>
[ben-linux@fluff.org: Fix header description]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

Documentation/kernel-parameters.txt

index 5f66ba2..4b765b7 100644 (file)
@@ -1351,6 +1351,27 @@ and is between 256 and 4096 characters. It is defined in the file
        min_addr=nn[KMG]        [KNL,BOOT,ia64] All physical memory below this
                        physical address is ignored.
 
+       mini2440=       [ARM,HW,KNL]
+                       Format:[0..2][b][c][t]
+                       Default: "0tb"
+                       MINI2440 configuration specification:
+                       0 - The attached screen is the 3.5" TFT
+                       1 - The attached screen is the 7" TFT
+                       2 - The VGA Shield is attached (1024x768)
+                       Leaving out the screen size parameter will not load
+                       the TFT driver, and the framebuffer will be left
+                       unconfigured.
+                       b - Enable backlight. The TFT backlight pin will be
+                       linked to the kernel VESA blanking code and a GPIO
+                       LED. This parameter is not necessary when using the
+                       VGA shield.
+                       c - Enable the s3c camera interface.
+                       t - Reserved for enabling touchscreen support. The
+                       touchscreen support is not enabled in the mainstream
+                       kernel as of 2.6.30, a preliminary port can be found
+                       in the "bleeding edge" mini2440 support kernel at
+                       http://repo.or.cz/w/linux-2.6/mini2440.git
+
        mminit_loglevel=
                        [KNL] When CONFIG_DEBUG_MEMORY_INIT is set, this
                        parameter allows control of the logging verbosity for