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bq2589x: Add CONFIG_CHARGER_TERM_CURRENT_LIMIT support.

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Create a config to allow customization of a board's charger
termination current and add support to bq2589x charger.

Note, BQ2589X_TERM_CURRENT_LIMIT_DEFAULT, currently set to 64 to make
CL benign to ryu board.  Future CL will change to 256 as thats the POR
value for that charger.

Signed-off-by: Todd Broch <tbroch@chromium.org>

BRANCH=smaug
BUG=chrome-os-partner:42848
TEST=manual, read charger IC register and see its termination current
set to 64mA

Change-Id: I79348ed62a077a6432c8d8db6ac90e1e4e92dbc7
Reviewed-on: https://chromium-review.googlesource.com/293095
Reviewed-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Todd Broch <tbroch@chromium.org>
Commit-Queue: Todd Broch <tbroch@chromium.org>
This commit is contained in:
Todd Broch
2015-08-12 20:51:46 -07:00
committed by ChromeOS Commit Bot
parent 09b065c84c
commit 82bc3c7028
3 changed files with 18 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
driver/charger/bq2589x.c
View File

@@ -29,6 +29,11 @@
#define CONFIG_CHARGER_BQ2589X_IR_COMP BQ2589X_IR_COMP_DEFAULT
#endif
/* Termination current limit setting */
#ifndef CONFIG_CHARGER_TERM_CURRENT_LIMIT
#define CONFIG_CHARGER_TERM_CURRENT_LIMIT BQ2589X_TERM_CURRENT_LIMIT_DEFAULT
#endif
/* Charger information */
static const struct charger_info bq2589x_charger_info = {
.name = "bq2589x",
@@ -304,7 +309,7 @@ static void bq2589x_init(void)
if (bq2589x_write(BQ2589X_REG_TIMER, val))
return;
if (bq2589x_set_terminate_current(64))
if (bq2589x_set_terminate_current(CONFIG_CHARGER_TERM_CURRENT_LIMIT))
return;
if (bq2589x_watchdog_reset())

2
driver/charger/bq2589x.h
View File

@@ -69,6 +69,8 @@
#define BQ2589X_IR_COMP_DEFAULT (BQ2589X_IR_TREG_120C | BQ2589X_IR_VCLAMP_0MV |\
BQ2589X_IR_BAT_COMP_0MOHM)
#define BQ2589X_TERM_CURRENT_LIMIT_DEFAULT 64
/* 5V VBUS Boost settings */
#define BQ2589X_BOOSTV_MV(mv) (((((mv) - 4550)/64) & 0xF) << 4)
#define BQ2589X_BOOSTV_DEFAULT BQ2589X_BOOSTV_MV(4998)

10
include/config.h
View File

@@ -300,6 +300,16 @@
*/
#undef CONFIG_CHARGER_CURRENT_LIMIT
/*
* Board specific charging current termination limit, in mA. If defined and
* charger supports setting termination current it should be set during charger
* init.
*
* TODO(tbroch): Only valid for bq2589x currently. Configure defaults for other
* charger ICs that support termination currents.
*/
#undef CONFIG_CHARGER_TERM_CURRENT_LIMIT
/*
* Board supports discharge mode. In this mode, the battery will discharge
* even if AC is present. Used for testing.