diff options
| author | Shelley Chen <shchen@chromium.org> | 2017-09-29 14:15:11 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2017-10-20 22:49:31 +0000 |
| commit | ebd533065f0dd7f00d6452e5019f685b769d5b0e (patch) | |
| tree | 8f466db905b0748dc8aec71297f9269aa8d057c0 /src/ec | |
| parent | bd885c5bac425c589582a610bd2dc92dd3809e06 (diff) | |
chromeec: Add function to retrieve usb c charger info
Add google_chromeec_get_usb_pd_power_info(), which will
call the EC_CMD_USB_PD_POWER_INFO host command to retrieve
the current and voltage info of the usb c charger.
Returns power info in watts.
BUG=b:37473486
BRANCH=None
TEST=output debug info to make sure that correct power
is returned.
Change-Id: Ie14a0a6163e1c2699cb20b4422c8062164d92076
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://review.coreboot.org/21771
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/ec')
| -rw-r--r-- | src/ec/google/chromeec/ec.c | 29 | ||||
| -rw-r--r-- | src/ec/google/chromeec/ec.h | 9 |
2 files changed, 38 insertions, 0 deletions
diff --git a/src/ec/google/chromeec/ec.c b/src/ec/google/chromeec/ec.c index 537fe25283..7ab9d6bdab 100644 --- a/src/ec/google/chromeec/ec.c +++ b/src/ec/google/chromeec/ec.c @@ -609,6 +609,35 @@ int google_chromeec_set_usb_charge_mode(u8 port_id, enum usb_charge_mode mode) return google_chromeec_command(&cmd); } +/* Get charger power info in Watts. Also returns type of charger */ +int google_chromeec_get_usb_pd_power_info(enum usb_chg_type *type, + u32 *max_watts) +{ + struct ec_params_usb_pd_power_info req = { + .port = PD_POWER_CHARGING_PORT, + }; + struct ec_response_usb_pd_power_info rsp; + struct chromeec_command cmd = { + .cmd_code = EC_CMD_USB_PD_POWER_INFO, + .cmd_version = 0, + .cmd_data_in = &req, + .cmd_size_in = sizeof(req), + .cmd_data_out = &rsp, + .cmd_size_out = sizeof(rsp), + .cmd_dev_index = 0, + }; + struct usb_chg_measures m; + int rv = google_chromeec_command(&cmd); + if (rv != 0) + return rv; + /* values are given in milliAmps and milliVolts */ + *type = rsp.type; + m = rsp.meas; + *max_watts = (m.current_max * m.voltage_max) / 1000000; + + return 0; +} + int google_chromeec_set_usb_pd_role(u8 port, enum usb_pd_control_role role) { struct ec_params_usb_pd_control req = { diff --git a/src/ec/google/chromeec/ec.h b/src/ec/google/chromeec/ec.h index e4ad0ffb05..25a90d756d 100644 --- a/src/ec/google/chromeec/ec.h +++ b/src/ec/google/chromeec/ec.h @@ -81,6 +81,15 @@ enum usb_charge_mode { }; int google_chromeec_set_usb_charge_mode(u8 port_id, enum usb_charge_mode mode); int google_chromeec_set_usb_pd_role(u8 port, enum usb_pd_control_role role); +/* + * Retrieve the charger type and max wattage. + * + * @param type charger type + * @param max_watts charger max wattage + * @return non-zero for error, otherwise 0. + */ +int google_chromeec_get_usb_pd_power_info(enum usb_chg_type *type, + u32 *max_watts); /* internal structure to send a command to the EC and wait for response. */ struct chromeec_command { |