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authorEdward Hill <ecgh@chromium.org>2019-01-08 11:21:12 -0700
committerchrome-bot <chrome-bot@chromium.org>2019-01-29 04:21:13 -0800
commitca7eba386a9e837cc0ec20a198a26a06066466e4 (patch)
tree0d21dfe9e6aaaebf4948813b4bfd4ae9762ede88
parent4106af71698211452933bf2bcc7726c49be6709f (diff)
downloadchrome-ec-ca7eba386a9e837cc0ec20a198a26a06066466e4.tar.gz
liara: Reduce input voltage to 5V when battery full
To reduce power consumption, reduce USB-C PD input voltage to 5V when the battery is full and the system is off (S5/G3). BUG=b:121383620 BRANCH=grunt TEST=battery 90%: chgsup shows 15V or 20V, when battery full: chgsup shows 5V, power on AP: chgsup shows 15V or 20V Change-Id: I377bc02ca5ec352619b05ef619c7a9e184f547cb Signed-off-by: Edward Hill <ecgh@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/1401018 Reviewed-by: Jett Rink <jettrink@chromium.org>
-rw-r--r--board/liara/battery.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/board/liara/battery.c b/board/liara/battery.c
index f3066949e6..b88b446473 100644
--- a/board/liara/battery.c
+++ b/board/liara/battery.c
@@ -6,8 +6,11 @@
*/
#include "battery_fuel_gauge.h"
+#include "charge_state.h"
+#include "chipset.h"
#include "common.h"
-#include "util.h"
+#include "hooks.h"
+#include "usb_pd.h"
/*
* Battery info for all Liara battery types. Note that the fields
@@ -162,3 +165,27 @@ const struct board_batt_params board_battery_info[] = {
BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_PANASONIC;
+
+/* Lower our input voltage to 5V in S5/G3 when battery is full. */
+static void reduce_input_voltage_when_full(void)
+{
+ int max_pd_voltage_mv;
+ int port;
+
+ if (charge_get_percent() == 100 &&
+ chipset_in_or_transitioning_to_state(CHIPSET_STATE_ANY_OFF))
+ max_pd_voltage_mv = 5000;
+ else
+ max_pd_voltage_mv = PD_MAX_VOLTAGE_MV;
+
+ if (pd_get_max_voltage() != max_pd_voltage_mv) {
+ for (port = 0; port < CONFIG_USB_PD_PORT_COUNT; port++)
+ pd_set_external_voltage_limit(port, max_pd_voltage_mv);
+ }
+}
+DECLARE_HOOK(HOOK_BATTERY_SOC_CHANGE, reduce_input_voltage_when_full,
+ HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_STARTUP, reduce_input_voltage_when_full,
+ HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, reduce_input_voltage_when_full,
+ HOOK_PRIO_DEFAULT);