scottk/OpenCellular
1
0
Fork 0
mirror of https://github.com/Telecominfraproject/OpenCellular.git synced 2026-01-07 16:11:43 +00:00
Code Issues Packages Projects Releases Wiki Activity

g: Change rdd 0.4V ref to 0.3V.

Browse Source 
On some boards, it was seen that SuzyQable wasn't detected by the rdd
block.  The voltage around 0.4V is marginal with a Vbus around 4.75V.
This commit simply adjust the 0.4V comparator reference voltage to 0.3V
in order to make the detection work.

BUG=b:64847312
BRANCH=cr50
TEST=Find a soraka where SuzyQable didn't work.  Verify with this patch,
it does work.  Additionally, verify that servo_v4 continues works.

Change-Id: If54630ec469408031cd84ffb93ef5fea42bdee3b
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/633403
Commit-Ready: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
This commit is contained in:
Aseda Aboagye
2017-08-24 09:03:46 -07:00
committed by chrome-bot
parent 1029239bc1
commit abd7e7d582
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
chip/g/rdd.c
View File

@@ -204,6 +204,13 @@ void init_rdd_state(void)
/* Configure to detect accessory connected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, DETECT_DEBUG);
/*
* Set the 0.4V comparator reference to 0.3V instead. The voltage is
* marginal near 0.4V for example with VBUS at 4.75V and a SuzyQable See
* b/64847312.
*/
GWRITE_FIELD(RDD, REF_ADJ, LVL0P4V, 0x2);
/*
* Enable interrupt for detecting CC. This minimizes the time before
* we transition to cable-detected at boot, and will cause us to wake