[openfirmware] [commit] r2658 - cpu/arm/olpc/1.75

[repository service]

Author: quozl
Date: Mon Oct 31 10:10:14 2011
New Revision: 2658
URL: http://tracker.coreboot.org/trac/openfirmware/changeset/2658

Log:
OLPC XO-1.75 C1 - accelerometer, use 100 kHz SCL rate now that SDA and SCL pullups are present, continue to use 25 kHz SCL rate for older devices.  #11367.

Modified:
   cpu/arm/olpc/1.75/accelerometer.fth

Modified: cpu/arm/olpc/1.75/accelerometer.fth
==============================================================================
--- cpu/arm/olpc/1.75/accelerometer.fth	Fri Oct 28 04:46:45 2011	(r2657)
+++ cpu/arm/olpc/1.75/accelerometer.fth	Mon Oct 31 10:10:14 2011	(r2658)
@@ -298,9 +298,10 @@
 ;
 
 : delay  ( -- )  d# 30 ms  ;
+d# 25,000 value bus-speed
 : open  ( -- flag )
    my-unit " set-address" $call-parent
-   d# 25,000 " set-bus-speed" $call-parent
+   bus-speed " set-bus-speed" $call-parent
    ['] accelerometer-on catch 0=   
 ;
 : close  ( -- )
@@ -389,10 +390,11 @@
 
 : probe  ( -- )
    h# 3a 6 " set-address" $call-parent
-   d# 25,000 " set-bus-speed" $call-parent
+   d# 25,000 " set-bus-speed" $call-parent \ XO-1.75 B1 lacks pullups SCL SDA
    ['] accelerometer-on catch  if
       \ The attempt to talk at the old address failed, so we assume the new chip
       \ Support for new LIS3DHTR chip
+      d# 100,000 to bus-speed
       d#  50 to min-x  d#  50 to min-y  d#  50 to min-z 
       d# 150 to max-x  d# 150 to max-y  d# 450 to max-z 
       h# 32 6 encode-phys " reg" property
@@ -401,6 +403,7 @@
       accelerometer-off
       \ Something responded to the old address, so we assume it's the old chip
       \ Support for old LIS33DE chip
+      d# 25,000 to bus-speed
       d#  20 to min-x  d#  20 to min-y  d#  20 to min-z 
       d# 400 to max-x  d# 400 to max-y  d# 400 to max-z 
       h# 3a 6 encode-phys " reg" property