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charge_manager: Pass uncapped / max current to current limit callback

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charge_manager may request a charge current limit less than the
capability of the supply in certain cases (eg. during PD voltage
transition, to make an effort to comply with reduced load spec).
Depending on the battery / system state, setting a reduced charge
current limit may result in brownout.

Pass the uncapped / max negotiated current to board_set_charge_limit()
so that boards may use it instead of the requested limit in such
circumstances.

BUG=chrome-os-partner:56139
BRANCH=gru
TEST=Manual on kevin with subsequent commit, boot system with zinger +
low-charge battery, verify devices powers up to OS without brownout.

Change-Id: I2b8e0d44edcf57ffe4ee0fdec1a1ed35c6becbbd
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/383732
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2016-09-09 10:11:18 -07:00
committed by chrome-bot
parent d8166a8d65
commit 94f2bc0740
19 changed files with 28 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
include/charge_manager.h
View File

@@ -110,7 +110,14 @@ int charge_manager_get_source_pdo(const uint32_t **src_pdo);
*/
int board_set_active_charge_port(int charge_port);
/* Set the charge current limit. */
void board_set_charge_limit(int port, int supplier, int charge_ma);
/*
* Set the charge current limit.
*
* @param port PD port.
* @param supplier Identified CHARGE_SUPPLIER_*.
* @param charge_ma Desired charge current limit, <= max_ma.
* @param max_ma Maximum charge current limit, >= charge_ma.
*/
void board_set_charge_limit(int port, int supplier, int charge_ma, int max_ma);
#endif /* __CROS_EC_CHARGE_MANAGER_H */

3
include/charge_ramp.h
View File

@@ -89,9 +89,6 @@ void chg_ramp_charge_supplier_change(int port, int supplier, int current,
#else
static inline void chg_ramp_charge_supplier_change(
int port, int supplier, timestamp_t registration_time) { }
/* Point directly to board function to set charge limit */
#define chg_ramp_set_min_current board_set_charge_limit
#endif
#endif /* __CROS_EC_CHARGE_RAMP_H */