From 201efb2bb0f7c4ae5f08f51b6f6b7cdfdba5b4f4 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 5 Jul 2021 16:32:49 -0600 Subject: cros_ec: Allow reading the battery-charge state 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 --- drivers/misc/cros_ec.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/misc/cros_ec.c') diff --git a/drivers/misc/cros_ec.c b/drivers/misc/cros_ec.c index 7904d5cc72..0818ef8ad6 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", -- cgit v1.2.3