diff options
| author | Frank Wang <frank.wang@rock-chips.com> | 2023-06-16 15:52:41 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-19 15:34:35 +0200 |
| commit | 8be558dcffe69b078b34b1fa93b82acaf4ce4957 (patch) | |
| tree | 891249ba5badd604dc7e95ff1dbe67bb2076b37c /drivers/usb/typec/tcpm/tcpm.c | |
| parent | 1e35f074399dece73d5df11847d4a0d7a6f49434 (diff) | |
usb: typec: tcpm: add get max power support
Traverse fixed pdos to calculate the maximum power that the charger
can provide, and it can be get by POWER_SUPPLY_PROP_INPUT_POWER_LIMIT
property.
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230616075241.27690-2-frank.wang@rock-chips.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/typec/tcpm/tcpm.c')
| -rw-r--r-- | drivers/usb/typec/tcpm/tcpm.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 9f6aaa3e70ca..829d75ebab42 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -6340,6 +6340,27 @@ static int tcpm_psy_get_current_now(struct tcpm_port *port, return 0; } +static int tcpm_psy_get_input_power_limit(struct tcpm_port *port, + union power_supply_propval *val) +{ + unsigned int src_mv, src_ma, max_src_uw = 0; + unsigned int i, tmp; + + for (i = 0; i < port->nr_source_caps; i++) { + u32 pdo = port->source_caps[i]; + + if (pdo_type(pdo) == PDO_TYPE_FIXED) { + src_mv = pdo_fixed_voltage(pdo); + src_ma = pdo_max_current(pdo); + tmp = src_mv * src_ma; + max_src_uw = tmp > max_src_uw ? tmp : max_src_uw; + } + } + + val->intval = max_src_uw; + return 0; +} + static int tcpm_psy_get_prop(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) @@ -6369,6 +6390,9 @@ static int tcpm_psy_get_prop(struct power_supply *psy, case POWER_SUPPLY_PROP_CURRENT_NOW: ret = tcpm_psy_get_current_now(port, val); break; + case POWER_SUPPLY_PROP_INPUT_POWER_LIMIT: + tcpm_psy_get_input_power_limit(port, val); + break; default: ret = -EINVAL; break; |