battery: add default battery_get_avg_xxx()

To add new SB_AVERAGE_CURRENT property to virtual battery,
it needs to use battery_get_avg_current() to get average current
values. This patch adds default functions returning error for
platforms without battery_avg_xxx() implementations.

BRANCH=none
BUG=b:170921599
TEST=read properties from sbs sysfs knobs
     (current_avg capacity_error_margin
      constant_charge_current_max constant_charge_voltage_max)

Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
Change-Id: I2dcad27e0c5148de9cacb003c343be4c75609c42
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2748195
Reviewed-by: Ting Shen <phoenixshen@chromium.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/common/battery.c b/common/battery.c
index c61a650047..eefb662eef 100644
--- a/common/battery.c
+++ b/common/battery.c
@@ -656,6 +656,16 @@ __attribute__((weak)) int get_battery_manufacturer_name(char *dest, int size)
 	return EC_SUCCESS;
 }
 
+__overridable int battery_get_avg_voltage(void)
+{
+	return -EC_ERROR_UNIMPLEMENTED;
+}
+
+__overridable int battery_get_avg_current(void)
+{
+	return -EC_ERROR_UNIMPLEMENTED;
+}
+
 int battery_manufacturer_name(char *dest, int size)
 {
 	return get_battery_manufacturer_name(dest, size);