From: "Thomas Weißschuh" <linux@weissschuh.net>
To: linux-pm@vger.kernel.org, Sebastian Reichel <sre@kernel.org>,
ibm-acpi-devel@lists.sourceforge.net,
platform-driver-x86@vger.kernel.org,
Mark Gross <markgross@kernel.org>,
Hans de Goede <hdegoede@redhat.com>,
Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: "Thomas Weißschuh" <linux@weissschuh.net>,
linux-kernel@vger.kernel.org, linrunner@gmx.net,
bberg@redhat.com, hadess@hadess.net, markpearson@lenovo.com,
nicolopiazzalunga@gmail.com, njoshi1@lenovo.com,
smclt30p@gmail.com
Subject: [PATCH v2 4/4] platform/x86: thinkpad_acpi: support inhibit-charge
Date: Wed, 24 Nov 2021 00:27:04 +0100 [thread overview]
Message-ID: <20211123232704.25394-5-linux@weissschuh.net> (raw)
In-Reply-To: <20211123232704.25394-1-linux@weissschuh.net>
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>
---
This patch is based on https://lore.kernel.org/platform-driver-x86/d2808930-5840-6ffb-3a59-d235cdb1fe16@gmail.com/
---
drivers/platform/x86/thinkpad_acpi.c | 64 +++++++++++++++++++++++++++-
1 file changed, 62 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index e3567cc686fa..7f2f46c71482 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9321,6 +9321,8 @@ 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,
@@ -9338,6 +9340,7 @@ enum {
THRESHOLD_START,
THRESHOLD_STOP,
FORCE_DISCHARGE,
+ INHIBIT_CHARGE,
};
struct tpacpi_battery_data {
@@ -9409,6 +9412,12 @@ 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;
@@ -9447,6 +9456,22 @@ 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;
@@ -9494,6 +9519,8 @@ 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)) {
@@ -9540,6 +9567,16 @@ 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);
@@ -9698,10 +9735,22 @@ 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);
}
@@ -9738,11 +9787,22 @@ 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;
--
2.34.0
next prev parent reply other threads:[~2021-11-23 23:27 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 23:27 [PATCH 0/4] power: supply: add charge_behaviour property (force-discharge, inhibit-charge) Thomas Weißschuh
2021-11-23 23:27 ` [PATCH v2 1/4] power: supply: add charge_behaviour attributes Thomas Weißschuh
2021-11-23 23:27 ` [PATCH v2 2/4] power: supply: add helpers for charge_behaviour sysfs Thomas Weißschuh
2021-11-23 23:27 ` [PATCH v2 3/4] platform/x86: thinkpad_acpi: support force-discharge Thomas Weißschuh
2021-11-23 23:27 ` Thomas Weißschuh [this message]
2021-11-25 18:04 ` [ibm-acpi-devel] [PATCH 0/4] power: supply: add charge_behaviour property (force-discharge, inhibit-charge) Kevin Locke
2021-12-03 21:33 ` Sebastian Reichel
2021-12-04 13:56 ` Hans de Goede
2021-12-16 15:41 ` Hans de Goede
2021-12-21 16:06 ` Hans de Goede
2021-12-04 16:04 ` Thomas Koch
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