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| author | Nicolas Boichat <drinkcat@chromium.org> | 2018-01-26 14:51:10 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-02-09 07:55:33 -0800 |
| commit | abdb022a2be9cac6a108b69253ccba1dd7e09ba3 (patch) | |
| tree | 1a5875279ab48a4187be57b2b3651b4500aa89e8 /include/battery.h | |
| parent | 730491df202e5b14e489a5ab31a78e47fcd47af3 (diff) | |
| download | chrome-ec-abdb022a2be9cac6a108b69253ccba1dd7e09ba3.tar.gz | |
battery: Allow 2 batteries to be fetched via ACPI
We share the same shared memory fields for both batteries. When
the host wants to switch battery to read out:
- The host sets EC_ACPI_MEM_BATTERY_INDEX to the required index
- EC then swaps the data is the shared memory fields, then update
EC_MEMMAP_BATT_INDEX
- Host waits for EC_MEMMAP_BATT_INDEX to have the required value,
then fetches the data
BRANCH=none
BUG=b:65697620
TEST=Boot lux, both /sys/class/power_supply/BAT0 and BAT1 are
present, data is valid.
TEST=Unplug base, BAT1 goes away, replug, BAT1 comes back.
Change-Id: Icce12f9eef2f6f8cde9bae0a968a65e1703d0369
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/888382
Reviewed-by: Gwendal Grignou <gwendal@google.com>
Diffstat (limited to 'include/battery.h')
| -rw-r--r-- | include/battery.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/include/battery.h b/include/battery.h index b783432ded..a97745b794 100644 --- a/include/battery.h +++ b/include/battery.h @@ -13,8 +13,9 @@ /* Battery index, only used with CONFIG_BATTERY_V2. */ enum battery_index { - BATT_IDX_MAIN, - BATT_IDX_BASE, + BATT_IDX_INVALID = -1, + BATT_IDX_MAIN = 0, + BATT_IDX_BASE = 1, }; #ifdef CONFIG_BATTERY_V2 @@ -377,6 +378,19 @@ void print_battery_debug(void); */ enum battery_disconnect_state battery_get_disconnect_state(void); +#ifdef CONFIG_BATTERY_V2 +/** + * Refresh battery information in host memory mapped region, if index is + * currently presented. + */ +void battery_memmap_refresh(enum battery_index index); + +/** + * Set which index to present in host memory mapped region. + */ +void battery_memmap_set_index(enum battery_index index); +#endif /* CONFIG_BATTERY_V2 */ + #ifdef CONFIG_CMD_I2C_STRESS_TEST_BATTERY extern struct i2c_stress_test_dev battery_i2c_stress_test_dev; #endif |