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Diffstat (limited to 'Documentation/fb/metronomefb.txt')
| -rw-r--r-- | Documentation/fb/metronomefb.txt | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/Documentation/fb/metronomefb.txt b/Documentation/fb/metronomefb.txt index b9a2e7b7e83..237ca412582 100644 --- a/Documentation/fb/metronomefb.txt +++ b/Documentation/fb/metronomefb.txt @@ -1,7 +1,7 @@ Metronomefb ----------- Maintained by Jaya Kumar <jayakumar.lkml.gmail.com> -Last revised: Nov 20, 2007 +Last revised: Mar 10, 2008 Metronomefb is a driver for the Metronome display controller. The controller is from E-Ink Corporation. It is intended to be used to drive the E-Ink @@ -11,20 +11,18 @@ display media here http://www.e-ink.com/products/matrix/metronome.html . Metronome is interfaced to the host CPU through the AMLCD interface. The host CPU generates the control information and the image in a framebuffer which is then delivered to the AMLCD interface by a host specific method. -Currently, that's implemented for the PXA's LCDC controller. The display and -error status are each pulled through individual GPIOs. +The display and error status are each pulled through individual GPIOs. -Metronomefb was written for the PXA255/gumstix/lyre combination and -therefore currently has board set specific code in it. If other boards based on -other architectures are available, then the host specific code can be separated -and abstracted out. +Metronomefb is platform independent and depends on a board specific driver +to do all physical IO work. Currently, an example is implemented for the +PXA board used in the AM-200 EPD devkit. This example is am200epd.c Metronomefb requires waveform information which is delivered via the AMLCD interface to the metronome controller. The waveform information is expected to be delivered from userspace via the firmware class interface. The waveform file can be compressed as long as your udev or hotplug script is aware of the need -to uncompress it before delivering it. metronomefb will ask for waveform.wbf -which would typically go into /lib/firmware/waveform.wbf depending on your +to uncompress it before delivering it. metronomefb will ask for metronome.wbf +which would typically go into /lib/firmware/metronome.wbf depending on your udev/hotplug setup. I have only tested with a single waveform file which was originally labeled 23P01201_60_WT0107_MTC. I do not know what it stands for. Caution should be exercised when manipulating the waveform as there may be |