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power: supply: sbs-battery: don't assume i2c errors as battery disconnect 

Current sbs-battery considers all smbus errors as disconnection events
when battery-detect pin isn't supplied, and restored to present state back
when any successful transaction is made.

This can lead to unwanted state changes between present and !present
when there's one i2c error and other following commands were successful.

This patch provides a unified way of checking presence by calling
sbs_get_battery_presence_and_health() when detect pin is not used.

Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Ikjoon Jang 2020-08-28 12:36:26 +08:00 committed by Sebastian Reichel
parent f385e2fcc5
commit 395a7251dc
1 changed files with 17 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/power/supply/sbs-battery.c
View File

@ -959,10 +959,17 @@ static int sbs_get_property(struct power_supply *psy,
return -EINVAL;
}
if (!chip->gpio_detect &&
chip->is_present != (ret >= 0)) {
sbs_update_presence(chip, (ret >= 0));
power_supply_changed(chip->power_supply);
if (!chip->gpio_detect && chip->is_present != (ret >= 0)) {
bool old_present = chip->is_present;
union power_supply_propval val;
ret = sbs_get_battery_presence_and_health(
client, POWER_SUPPLY_PROP_PRESENT, &val);
sbs_update_presence(chip, !ret && val.intval);
if (old_present != chip->is_present)
power_supply_changed(chip->power_supply);
}
done:
@ -1147,11 +1154,13 @@ skip_gpio:
* to the battery.
*/
if (!(force_load || chip->gpio_detect)) {
rc = sbs_read_word_data(client, sbs_data[REG_STATUS].addr);
union power_supply_propval val;
if (rc < 0) {
dev_err(&client->dev, "%s: Failed to get device status\n",
__func__);
rc = sbs_get_battery_presence_and_health(
client, POWER_SUPPLY_PROP_PRESENT, &val);
if (rc < 0 || !val.intval) {
dev_err(&client->dev, "Failed to get present status\n");
rc = -ENODEV;
goto exit_psupply;
}
}