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charger: bd99955: Set pre-charge current in addition to fast charge

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Pre-charge vs fast-charge mode depends on battery voltage relative to
VSYS. Rather than checking battery voltage (which may change), set
pre-charge and fast-charge currents whenever charger_set_current() is
called.

BUG=chrome-os-partner:55416
BRANCH=None
TEST=Manual on kevin. Verify system continues to boot with no battery.
Attach depleted battery, run "battery" and verify charger current is
~200 mA.

Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: I68c06108c6d85ceede396294bedd1a017ddddd52
Reviewed-on: https://chromium-review.googlesource.com/361993
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2016-07-20 14:30:24 -07:00
committed by chrome-bot
parent 7f2e7f7212
commit 27aac6efb6
2 changed files with 13 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
driver/charger/bd99955.c
View File

@@ -592,6 +592,8 @@ int charger_get_current(int *current)
int charger_set_current(int current)
{
int rv;
/* Charge current step 64 mA */
current &= ~0x3F;
@@ -601,8 +603,14 @@ int charger_set_current(int current)
else if (current < bd99955_charger_info.current_min)
current = bd99955_charger_info.current_min;
return ch_raw_write16(BD99955_CMD_CHG_CURRENT, current,
BD99955_BAT_CHG_COMMAND);
rv = ch_raw_write16(BD99955_CMD_CHG_CURRENT, current,
BD99955_BAT_CHG_COMMAND);
if (rv)
return rv;
return ch_raw_write16(BD99955_CMD_IPRECH_SET,
MIN(current, BD99955_IPRECH_MAX),
BD99955_EXTENDED_COMMAND);
}
int charger_get_voltage(int *voltage)

3
driver/charger/bd99955.h
View File

@@ -108,7 +108,10 @@ enum bd99955_charge_port {
#define BD99955_CMD_VSYSVAL_THH_SET 0x12
#define BD99955_CMD_VSYSVAL_THL_SET 0x13
#define BD99955_CMD_ITRICH_SET 0x14
#define BD99955_CMD_IPRECH_SET 0x15
#define BD99955_IPRECH_MAX 1024
#define BD99955_CMD_ICHG_SET 0x16
#define BD99955_CMD_ITERM_SET 0x17
#define BD99955_CMD_VPRECHG_TH_SET 0x18