scottk/OpenCellular
1
0
Fork 0
mirror of https://github.com/Telecominfraproject/OpenCellular.git synced 2025-12-30 02:20:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

bd9995x: more delay time between chg_en and vsys_set

Browse Source 
The nvdc voltage has a kind of deep, so that rarely observed
NVDC down at this point because of back-boosting.
Our sequence to enable charger bit and setting vsysreg
is correct but rohm introduce charger may need some more time
to be stable when between chg_en and vsys_set to start charge

BUG=chrome-os-partner:60380
BRANCH=gru
TEST=Manual on kevin, trigger battery disconnect, re-attach AC, verify
system boots cleanly. and see voltage probing on c54@60380

Change-Id: Ic05091379322ffaac16fe827a47345c76c85f3e5
Signed-off-by: Wonjoon Lee <woojoo.lee@samsung.com>
Reviewed-on: https://chromium-review.googlesource.com/434252
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>
This commit is contained in:
Wonjoon Lee
2017-01-27 17:00:03 -08:00
committed by chrome-bot
parent 79a1e2072d
commit ef976e6387
1 changed files with 23 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
driver/charger/bd9995x.c
View File

@@ -541,19 +541,31 @@ int charger_get_status(int *status)
int charger_set_mode(int mode)
{
int rv;
int rv, inhibit_chg;
static int inhibit_chg_prev = -1;
if (mode & CHARGE_FLAG_INHIBIT_CHARGE) {
rv = bd9995x_set_vsysreg(BD9995X_DISCHARGE_VSYSREG);
msleep(50);
rv |= bd9995x_charger_enable(0);
} else {
rv = bd9995x_charger_enable(1);
msleep(1);
rv |= bd9995x_set_vsysreg(BD9995X_CHARGE_VSYSREG);
inhibit_chg = mode & CHARGE_FLAG_INHIBIT_CHARGE;
if (inhibit_chg != inhibit_chg_prev) {
if (inhibit_chg) {
rv = bd9995x_set_vsysreg(BD9995X_DISCHARGE_VSYSREG);
msleep(50);
rv |= bd9995x_charger_enable(0);
} else {
rv = bd9995x_charger_enable(1);
/*
* BGATE capacitor max : 0.1uF + 20%
* Charge MOSFET threshold max : 2.8V
* BGATE charge pump current min : 3uA
* T = C * V / I so, Tmax = 112ms
*/
msleep(115);
rv |= bd9995x_set_vsysreg(BD9995X_CHARGE_VSYSREG);
}
inhibit_chg_prev = inhibit_chg;
if (rv)
return rv;
}
if (rv)
return rv;
if (mode & CHARGE_FLAG_POR_RESET) {
rv = bd9995x_por_reset();