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platform/x86: thinkpad_acpi: support inhibit-charge 

This adds support for the inhibit-charge charge_behaviour through the
embedded controller of ThinkPads.

Co-developed-by: Thomas Koch <linrunner@gmx.net>
Signed-off-by: Thomas Koch <linrunner@gmx.net>
Co-developed-by: Nicolò Piazzalunga <nicolopiazzalunga@gmail.com>
Signed-off-by: Nicolò Piazzalunga <nicolopiazzalunga@gmail.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20211123232704.25394-5-linux@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Thomas Weißschuh 2021-11-24 00:27:04 +01:00 committed by Hans de Goede
parent b55d416d48
commit 400cffd5f4
1 changed files with 62 additions and 2 deletions
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64
drivers/platform/x86/thinkpad_acpi.c
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@ -9216,6 +9216,8 @@ static struct ibm_struct mute_led_driver_data = {
#define SET_STOP "BCSS"
#define GET_DISCHARGE "BDSG"
#define SET_DISCHARGE "BDSS"
#define GET_INHIBIT "BICG"
#define SET_INHIBIT "BICS"
enum {
BAT_ANY = 0,
@ -9233,6 +9235,7 @@ enum {
THRESHOLD_START,
THRESHOLD_STOP,
FORCE_DISCHARGE,
INHIBIT_CHARGE,
};
struct tpacpi_battery_data {
@ -9304,6 +9307,12 @@ static int tpacpi_battery_get(int what, int battery, int *ret)
/* The force discharge status is in bit 0 */
*ret = *ret & 0x01;
return 0;
case INHIBIT_CHARGE:
if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery))
return -ENODEV;
/* The inhibit charge status is in bit 0 */
*ret = *ret & 0x01;
return 0;
default:
pr_crit("wrong parameter: %d", what);
return -EINVAL;
@ -9342,6 +9351,22 @@ static int tpacpi_battery_set(int what, int battery, int value)
return -ENODEV;
}
return 0;
case INHIBIT_CHARGE:
/* When setting inhibit charge, we set a default value of
* always breaking on AC detach and the effective time is set to
* be permanent.
* The battery ID is in bits 4-5, 2 bits,
* the effective time is in bits 8-23, 2 bytes.
* A time of FFFF indicates forever.
*/
param = value;
param |= battery << 4;
param |= 0xFFFF << 8;
if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) {
pr_err("failed to set inhibit charge on %d", battery);
return -ENODEV;
}
return 0;
default:
pr_crit("wrong parameter: %d", what);
return -EINVAL;
@ -9389,6 +9414,8 @@ static int tpacpi_battery_probe(int battery)
* 4) Check for support
* 5) Get the current force discharge status
* 6) Check for support
* 7) Get the current inhibit charge status
* 8) Check for support
*/
if (acpi_has_method(hkey_handle, GET_START)) {
if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
@ -9435,6 +9462,16 @@ static int tpacpi_battery_probe(int battery)
battery_info.batteries[battery].charge_behaviours |=
BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
}
if (acpi_has_method(hkey_handle, GET_INHIBIT)) {
if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) {
pr_err("Error probing battery inhibit charge; %d\n", battery);
return -ENODEV;
}
/* Support is marked in bit 5 */
if (ret & BIT(5))
battery_info.batteries[battery].charge_behaviours |=
BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE);
}
battery_info.batteries[battery].charge_behaviours |=
BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
@ -9593,10 +9630,22 @@ static ssize_t charge_behaviour_show(struct device *dev,
if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
return -ENODEV;
if (ret)
if (ret) {
active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
goto out;
}
}
if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) {
if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret))
return -ENODEV;
if (ret) {
active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
goto out;
}
}
out:
return power_supply_charge_behaviour_show(dev, available, active, buf);
}
@ -9633,11 +9682,22 @@ static ssize_t charge_behaviour_store(struct device *dev,
case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0));
if (ret < 0)
return ret;
break;
case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1);
if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0);
ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1));
if (ret < 0)
return ret;
break;
case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE:
if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1));
if (ret < 0)
return ret;
break;