Add a function to read this information from the EC. It is useful for determining whether the battery has enough charge to boot.
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/misc/cros_ec.c | 17 +++++++++++++++++ include/cros_ec.h | 8 ++++++++ 2 files changed, 25 insertions(+)
diff --git a/drivers/misc/cros_ec.c b/drivers/misc/cros_ec.c index 7904d5cc72d..0818ef8ad6e 100644 --- a/drivers/misc/cros_ec.c +++ b/drivers/misc/cros_ec.c @@ -1661,6 +1661,23 @@ int cros_ec_get_switches(struct udevice *dev) return ret; }
+int cros_ec_read_batt_charge(struct udevice *dev, uint *chargep) +{ + struct ec_params_charge_state req; + struct ec_response_charge_state resp; + int ret; + + req.cmd = CHARGE_STATE_CMD_GET_STATE; + ret = ec_command(dev, EC_CMD_CHARGE_STATE, 0, &req, sizeof(req), + &resp, sizeof(resp)); + if (ret) + return log_msg_ret("read", ret); + + *chargep = resp.get_state.batt_state_of_charge; + + return 0; +} + UCLASS_DRIVER(cros_ec) = { .id = UCLASS_CROS_EC, .name = "cros-ec", diff --git a/include/cros_ec.h b/include/cros_ec.h index 9396b4d2466..9dab6cdf9ba 100644 --- a/include/cros_ec.h +++ b/include/cros_ec.h @@ -652,4 +652,12 @@ int cros_ec_vstore_read(struct udevice *dev, int slot, uint8_t *data); int cros_ec_vstore_write(struct udevice *dev, int slot, const uint8_t *data, size_t size);
+/** + * cros_ec_read_batt_charge() - Read the battery-charge state + * + * @dev: CROS-EC device + * @chargep: Return battery-charge state as a percentage + */ +int cros_ec_read_batt_charge(struct udevice *dev, uint *chargep); + #endif