Am 08.05.2010 um 08:57 schrieb Daniel Glöckner:
On Sat, May 08, 2010 at 08:18:34AM +0200, Dr. H. Nikolaus Schaller
wrote:
It looks as if there is some additional PIC chip (called MCU) for
power management which needs an indvidual driver... But there is
both code for I2C accessing a PIC and simply through a GPIO 65. So I
suspect there are two hardware variants and things are controlled by
CONFIG_MINIPC_PIC16X54.
I thought they were using only the LPC915 through I2C to power off
(and read the battery) and the gpio code was just a remnant of one
of Ingenic's reference designs.
Yes, this appears to be consistent with my thoughts. The GPIO code in
the celinux sources is disabled (which indicates an older design). My
experimental machine *may* be one of those with GPIO (I got it as a
sample unit and have never opened it :).
Has anyone done an analysis of the PIC/LPC915/MCU thing?
If not, I think it should not be too difficult to port/adapt the /proc
driver to Linux 2.6 - assuming that it is already doing the right
things...
BR,
Nikolaus
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