[PATCH v2 0/6] platform-x86: lenovo-wmi: Add fixes and enhancement

[PATCH v2 0/6] platform-x86: lenovo-wmi: Add fixes and enhancement

[Derek J. Clark]

This series adds many much needed features and fixes to the lenovo-wmi
drivers.

Patch 1 adds a macro to make assigning attribute ID's for capdata
cleaner and easier.
Patch 2 addresses bugs where devices that don't support exposed
attributes would still create the attribute, and also attempts to
identify the correct capdata and set/get methods as some legacy
interfaces don't use the custom mode in the method or capdata ID.
Patch 3 adds the remaining CPU attributes that weren't previously
exposed.
Patch 4 adds the GPU attributes that weren't previously exposed.
Patch 5 consolidates name constants in preparation for patch 6.
Patch 6 adds battery charge-type limiting when supported only by WMI.

After applying Rong's series from
https://lore.kernel.org/platform-driver-x86/20260210191938.137234-1-i@rong.moe/
I found that there weren't any conflicts, so rather than combine
the series we can just review each separately.

Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
v2:
 - Fix gpu_mode misisng from attributes list.
 - Fix prototypes for power suppy patch.
 - Reorganize CPU and GPU attributes alphabetically.
 - Break out the patch consolidating the driver name cost.
 - Move some of the refactoring of attribute_id back to into patch 1
   where it belongs.
 - Fix some additional typos in function prototypes.
v1: https://lore.kernel.org/platform-driver-x86/20260213081243.794288-1-derekjohn.clark@gmail.com/

Derek J. Clark (6):
  platform/x86: lenovo-wmi-other: Add LWMI_ATTR_ID Macro
  platform/x86: lenovo-wmi-other: Limit adding attributes to supported
    devices
  platform/x86: lenovo-wmi-other: Add missing CPU tunable attributes
  platform/x86: lenovo-wmi-other: Add GPU tunable attributes
  platform-x86: lenovo-wmi-other: Consolidate name into single const
  platform/x86: lenovo-wmi-other: Add WMI battery charge limiting.

 .../wmi/devices/lenovo-wmi-other.rst          |  21 +
 drivers/platform/x86/lenovo/wmi-capdata.h     |  13 +-
 drivers/platform/x86/lenovo/wmi-gamezone.h    |   1 +
 drivers/platform/x86/lenovo/wmi-other.c       | 606 ++++++++++++++++--
 4 files changed, 592 insertions(+), 49 deletions(-)


base-commit: 5a5203a45b063a594e89a2aeaf9e4923893a5b4c
-- 
2.52.0

[PATCH v2 1/6] platform/x86: lenovo-wmi-other: Add LWMI_ATTR_ID Macro

[Derek J. Clark]

Adds LWMI_ATTR_ID macro. In the same vein as LWMI_ATTR_ID_FAN_RPM,
but as a generic, to de-duplicate attribute_id assignment biolerplate.

Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
 drivers/platform/x86/lenovo/wmi-capdata.h  |  6 ++++
 drivers/platform/x86/lenovo/wmi-gamezone.h |  1 +
 drivers/platform/x86/lenovo/wmi-other.c    | 36 ++++++----------------
 3 files changed, 17 insertions(+), 26 deletions(-)

diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h
index 8c1df3efcc553..27202e2dc8a59 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.h
+++ b/drivers/platform/x86/lenovo/wmi-capdata.h
@@ -17,6 +17,12 @@
 #define LWMI_ATTR_MODE_ID_MASK	GENMASK(15, 8)
 #define LWMI_ATTR_TYPE_ID_MASK	GENMASK(7, 0)
 
+#define LWMI_ATTR_ID(dev, feat, mode, type) \
+	(FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, dev) | \
+	 FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, feat) | \
+	 FIELD_PREP(LWMI_ATTR_MODE_ID_MASK, mode) | \
+	 FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, type))
+
 #define LWMI_DEVICE_ID_FAN	0x04
 
 struct component_match;
diff --git a/drivers/platform/x86/lenovo/wmi-gamezone.h b/drivers/platform/x86/lenovo/wmi-gamezone.h
index 6b163a5eeb959..ddb919cf6c36d 100644
--- a/drivers/platform/x86/lenovo/wmi-gamezone.h
+++ b/drivers/platform/x86/lenovo/wmi-gamezone.h
@@ -10,6 +10,7 @@ enum gamezone_events_type {
 };
 
 enum thermal_mode {
+	LWMI_GZ_THERMAL_MODE_NONE =	   0x00,
 	LWMI_GZ_THERMAL_MODE_QUIET =	   0x01,
 	LWMI_GZ_THERMAL_MODE_BALANCED =	   0x02,
 	LWMI_GZ_THERMAL_MODE_PERFORMANCE = 0x03,
diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index 6040f45aa2b0d..95886df39c8d2 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -71,10 +71,9 @@
 #define LWMI_FAN_NR 4
 #define LWMI_FAN_ID(x) ((x) + LWMI_FAN_ID_BASE)
 
-#define LWMI_ATTR_ID_FAN_RPM(x)						\
-	(FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, LWMI_DEVICE_ID_FAN) |	\
-	 FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, LWMI_FEATURE_ID_FAN_RPM) |	\
-	 FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, LWMI_FAN_ID(x)))
+#define LWMI_ATTR_ID_FAN_RPM(x)                                   \
+	LWMI_ATTR_ID(LWMI_DEVICE_ID_FAN, LWMI_FEATURE_ID_FAN_RPM, \
+		     LWMI_GZ_THERMAL_MODE_NONE, LWMI_FAN_ID(x))
 
 #define LWMI_FAN_DIV 100
 
@@ -716,12 +715,8 @@ static ssize_t attr_capdata01_show(struct kobject *kobj,
 	u32 attribute_id;
 	int value, ret;
 
-	attribute_id =
-		FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, tunable_attr->device_id) |
-		FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, tunable_attr->feature_id) |
-		FIELD_PREP(LWMI_ATTR_MODE_ID_MASK,
-			   LWMI_GZ_THERMAL_MODE_CUSTOM) |
-		FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, tunable_attr->type_id);
+	attribute_id = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
+				    LWMI_GZ_THERMAL_MODE_CUSTOM, tunable_attr->type_id);
 
 	ret = lwmi_cd01_get_data(priv->cd01_list, attribute_id, &capdata);
 	if (ret)
@@ -776,7 +771,6 @@ static ssize_t attr_current_value_store(struct kobject *kobj,
 	struct wmi_method_args_32 args;
 	struct capdata01 capdata;
 	enum thermal_mode mode;
-	u32 attribute_id;
 	u32 value;
 	int ret;
 
@@ -787,13 +781,10 @@ static ssize_t attr_current_value_store(struct kobject *kobj,
 	if (mode != LWMI_GZ_THERMAL_MODE_CUSTOM)
 		return -EBUSY;
 
-	attribute_id =
-		FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, tunable_attr->device_id) |
-		FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, tunable_attr->feature_id) |
-		FIELD_PREP(LWMI_ATTR_MODE_ID_MASK, mode) |
-		FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, tunable_attr->type_id);
+	args.arg0 = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
+				 mode, tunable_attr->type_id);
 
-	ret = lwmi_cd01_get_data(priv->cd01_list, attribute_id, &capdata);
+	ret = lwmi_cd01_get_data(priv->cd01_list, args.arg0, &capdata);
 	if (ret)
 		return ret;
 
@@ -804,7 +795,6 @@ static ssize_t attr_current_value_store(struct kobject *kobj,
 	if (value < capdata.min_value || value > capdata.max_value)
 		return -EINVAL;
 
-	args.arg0 = attribute_id;
 	args.arg1 = value;
 
 	ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
@@ -838,7 +828,6 @@ static ssize_t attr_current_value_show(struct kobject *kobj,
 	struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
 	struct wmi_method_args_32 args;
 	enum thermal_mode mode;
-	u32 attribute_id;
 	int retval;
 	int ret;
 
@@ -846,13 +835,8 @@ static ssize_t attr_current_value_show(struct kobject *kobj,
 	if (ret)
 		return ret;
 
-	attribute_id =
-		FIELD_PREP(LWMI_ATTR_DEV_ID_MASK, tunable_attr->device_id) |
-		FIELD_PREP(LWMI_ATTR_FEAT_ID_MASK, tunable_attr->feature_id) |
-		FIELD_PREP(LWMI_ATTR_MODE_ID_MASK, mode) |
-		FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, tunable_attr->type_id);
-
-	args.arg0 = attribute_id;
+	args.arg0 = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
+				 mode, tunable_attr->type_id);
 
 	ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
 				    (unsigned char *)&args, sizeof(args),

base-commit: 5a5203a45b063a594e89a2aeaf9e4923893a5b4c
-- 
2.52.0

[PATCH v2 2/6] platform/x86: lenovo-wmi-other: Limit adding attributes to supported devices

[Derek J. Clark]

Adds lwmi_is_attr_01_supported, and only creates the attribute subfolder
if the attribute is supported by the hardware. Due to some poorly
implemented BIOS, this is a multi-step sequence of events. This is
because:
- Some BIOS support getting the capability data from custom mode (0xff),
  while others only support it in no-mode (0x00).
- Similarly, some BIOS support get/set for the current value from custom
  mode (0xff), while others only support it in no-mode (0x00).
- Some BIOS report capability data for a method that is not fully
  implemented.
- Some BIOS have methods fully implemented, but no complimentary
  capability data.

To ensure we only expose fully implemented methods with corresponding
capability data, we check each outcome before reporting that an
attribute can be supported.

Checking for lwmi_is_attr_01_supported during remove is not done to
ensure that we don't attempt to call cd01 or send WMI events if one of
the interfaces being removed was the cause of the driver unloading.

While adding members to tunable_attr_01, remove unused capdata pointer
and limit size of all ID's to the appropriate size.

Reported-by: Kurt Borja <kuurtb@gmail.com>
Closes: https://lore.kernel.org/platform-driver-x86/DG60P3SHXR8H.3NSEHMZ6J7XRC@gmail.com/
Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
 drivers/platform/x86/lenovo/wmi-other.c | 117 +++++++++++++++++++++---
 1 file changed, 102 insertions(+), 15 deletions(-)

diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index 95886df39c8d2..f3f12303e3798 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -545,11 +545,12 @@ static void lwmi_om_fan_info_collect_cd_fan(struct device *dev, struct cd_list *
 /* ======== fw_attributes (component: lenovo-wmi-capdata 01) ======== */
 
 struct tunable_attr_01 {
-	struct capdata01 *capdata;
 	struct device *dev;
-	u32 feature_id;
-	u32 device_id;
-	u32 type_id;
+	u8 feature_id;
+	u8 device_id;
+	u8 type_id;
+	u8 cd_mode_id; /* mode arg for searching capdata */
+	u8 cv_mode_id; /* mode arg for set/get current_value */
 };
 
 static struct tunable_attr_01 ppt_pl1_spl = {
@@ -716,7 +717,7 @@ static ssize_t attr_capdata01_show(struct kobject *kobj,
 	int value, ret;
 
 	attribute_id = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
-				    LWMI_GZ_THERMAL_MODE_CUSTOM, tunable_attr->type_id);
+				    tunable_attr->cd_mode_id, tunable_attr->type_id);
 
 	ret = lwmi_cd01_get_data(priv->cd01_list, attribute_id, &capdata);
 	if (ret)
@@ -782,7 +783,7 @@ static ssize_t attr_current_value_store(struct kobject *kobj,
 		return -EBUSY;
 
 	args.arg0 = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
-				 mode, tunable_attr->type_id);
+				 tunable_attr->cd_mode_id, tunable_attr->type_id);
 
 	ret = lwmi_cd01_get_data(priv->cd01_list, args.arg0, &capdata);
 	if (ret)
@@ -795,6 +796,8 @@ static ssize_t attr_current_value_store(struct kobject *kobj,
 	if (value < capdata.min_value || value > capdata.max_value)
 		return -EINVAL;
 
+	args.arg0 = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
+				 tunable_attr->cv_mode_id, tunable_attr->type_id);
 	args.arg1 = value;
 
 	ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
@@ -828,13 +831,16 @@ static ssize_t attr_current_value_show(struct kobject *kobj,
 	struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
 	struct wmi_method_args_32 args;
 	enum thermal_mode mode;
-	int retval;
-	int ret;
+	int retval, ret;
 
 	ret = lwmi_om_notifier_call(&mode);
 	if (ret)
 		return ret;
 
+	/* If "no-mode" is the supported mode, ensure we never send current mode */
+	if (tunable_attr->cv_mode_id == LWMI_GZ_THERMAL_MODE_NONE)
+		mode = tunable_attr->cv_mode_id;
+
 	args.arg0 = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
 				 mode, tunable_attr->type_id);
 
@@ -847,6 +853,85 @@ static ssize_t attr_current_value_show(struct kobject *kobj,
 	return sysfs_emit(buf, "%d\n", retval);
 }
 
+/**
+ * lwmi_attr_01_is_supported() - Determine if the given attribute is supported.
+ * @tunable_attr: The attribute to verify.
+ *
+ * First check if the attribute has a corresponding capdata01 table in the cd01
+ * module under the "custom" mode (0xff). If that is not present then check if
+ * there is a corresponding "no-mode" (0x00) entry. If either of those passes,
+ * check capdata->supported for values > 0. If capdata is available, attempt to
+ * determine the set/get mode for the current value property using a similar
+ * pattern. If the value returned by either custom or no-mode is 0, or we get
+ * an error, we assume that mode is not supported. If any of the above checks
+ * fail then the attribute is not fully supported.
+ *
+ * The probed cd_mode_id/cv_mode_id are stored on the tunable_attr for later
+ * reference.
+ *
+ * Return: Support level, or an error code.
+ */
+static int lwmi_attr_01_is_supported(struct tunable_attr_01 *tunable_attr)
+{
+	struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
+	u8 mode = LWMI_GZ_THERMAL_MODE_CUSTOM;
+	struct wmi_method_args_32 args;
+	struct capdata01 capdata;
+	int retval, ret;
+
+	/* Determine tunable_attr->cd_mode_id */
+no_mode_fallback_1:
+	args.arg0 = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
+				 mode, tunable_attr->type_id);
+
+	ret = lwmi_cd01_get_data(priv->cd01_list, args.arg0, &capdata);
+	if (ret && mode) {
+		dev_dbg(tunable_attr->dev, "Attribute id %x not supported\n", args.arg0);
+		mode = LWMI_GZ_THERMAL_MODE_NONE;
+		goto no_mode_fallback_1;
+	}
+	if (ret)
+		goto not_supported;
+	if (!capdata.supported) {
+		ret = -EOPNOTSUPP;
+		goto not_supported;
+	}
+
+	tunable_attr->cd_mode_id = mode;
+
+	/* Determine tunable_attr->cv_mode_id */
+	mode = LWMI_GZ_THERMAL_MODE_CUSTOM;
+no_mode_fallback_2:
+	args.arg0 = LWMI_ATTR_ID(tunable_attr->device_id, tunable_attr->feature_id,
+				 mode, tunable_attr->type_id);
+
+	ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
+				    (unsigned char *)&args, sizeof(args),
+				    &retval);
+	if ((ret && mode) || (!retval && mode)) {
+		dev_dbg(tunable_attr->dev, "Attribute id %x not supported\n", args.arg0);
+		mode = LWMI_GZ_THERMAL_MODE_NONE;
+		goto no_mode_fallback_2;
+	}
+	if (ret)
+		goto not_supported;
+	if (retval == 0) {
+		ret = -EOPNOTSUPP;
+		goto not_supported;
+	}
+
+	tunable_attr->cv_mode_id = mode;
+	dev_dbg(tunable_attr->dev, "cd_mode_id: %02x%02x%02x%02x, cv_mode_id: %#08x attribute support level: %x\n",
+		tunable_attr->device_id, tunable_attr->feature_id, tunable_attr->cd_mode_id,
+		tunable_attr->type_id, args.arg0, capdata.supported);
+
+	return capdata.supported;
+
+not_supported:
+	dev_dbg(tunable_attr->dev, "Attribute id %x not supported\n", args.arg0);
+	return ret;
+}
+
 /* Lenovo WMI Other Mode Attribute macros */
 #define __LWMI_ATTR_RO(_func, _name)                                  \
 	{                                                             \
@@ -970,19 +1055,21 @@ static int lwmi_om_fw_attr_add(struct lwmi_om_priv *priv)
 	}
 
 	for (i = 0; i < ARRAY_SIZE(cd01_attr_groups) - 1; i++) {
-		err = sysfs_create_group(&priv->fw_attr_kset->kobj,
-					 cd01_attr_groups[i].attr_group);
-		if (err)
-			goto err_remove_groups;
-
 		cd01_attr_groups[i].tunable_attr->dev = &priv->wdev->dev;
+		if (lwmi_attr_01_is_supported(cd01_attr_groups[i].tunable_attr) > 0) {
+			err = sysfs_create_group(&priv->fw_attr_kset->kobj,
+						 cd01_attr_groups[i].attr_group);
+			if (err)
+				goto err_remove_groups;
+		}
 	}
 	return 0;
 
 err_remove_groups:
 	while (i--)
-		sysfs_remove_group(&priv->fw_attr_kset->kobj,
-				   cd01_attr_groups[i].attr_group);
+		if (lwmi_attr_01_is_supported(cd01_attr_groups[i].tunable_attr) > 0)
+			sysfs_remove_group(&priv->fw_attr_kset->kobj,
+					   cd01_attr_groups[i].attr_group);
 
 	kset_unregister(priv->fw_attr_kset);
 
-- 
2.52.0

[PATCH v2 3/6] platform/x86: lenovo-wmi-other: Add missing CPU tunable attributes

[Derek J. Clark]

Use an enum for all device Id's and CPU attribute feature ID's,
add missing CPU attributes.

Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
 .../wmi/devices/lenovo-wmi-other.rst          |  10 ++
 drivers/platform/x86/lenovo/wmi-capdata.h     |   5 +-
 drivers/platform/x86/lenovo/wmi-other.c       | 108 +++++++++++++++++-
 3 files changed, 117 insertions(+), 6 deletions(-)

diff --git a/Documentation/wmi/devices/lenovo-wmi-other.rst b/Documentation/wmi/devices/lenovo-wmi-other.rst
index 01d4711567380..f4763ed66cc6d 100644
--- a/Documentation/wmi/devices/lenovo-wmi-other.rst
+++ b/Documentation/wmi/devices/lenovo-wmi-other.rst
@@ -68,9 +68,19 @@ Each attribute has the following properties:
  - type
 
 The following firmware-attributes are implemented:
+ - cpu_oc_stat: CPU Overlocking Status
+ - cpu_temp: CPU Thermal Load Limit
+ - ppt_cpu_cl: CPU Cross Loading Power Limit
+ - ppt_pl1_apu_spl: Platform Profile Tracking APU Sustained Power Limit
  - ppt_pl1_spl: Platform Profile Tracking Sustained Power Limit
+ - ppt_pl1_spl_cl: Platform Profile Tracking Cross Loading Sustained Power Limit
+ - ppt_pl1_tau: Exceed Duration for Platform Profile Tracking Sustained Power Limit
  - ppt_pl2_sppt: Platform Profile Tracking Slow Package Power Tracking
+ - ppt_pl2_sppt_cl: Platform Profile Tracking Cross Loading Slow Package Tracking
  - ppt_pl3_fppt: Platform Profile Tracking Fast Package Power Tracking
+ - ppt_pl3_fppt_cl: Platform Profile Tracking Cross Loading Fast Package Power Tracking
+ - ppt_pl4_ipl: Platform Profile Trakcing Instantaneous Power Limit
+ - ppt_pl4_ipl_cl: Platform Profile Tracking Cross Loading Instantaneous Power Limit
 
 LENOVO_FAN_TEST_DATA
 -------------------------
diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h
index 27202e2dc8a59..aa48f43cbb43b 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.h
+++ b/drivers/platform/x86/lenovo/wmi-capdata.h
@@ -23,7 +23,10 @@
 	 FIELD_PREP(LWMI_ATTR_MODE_ID_MASK, mode) | \
 	 FIELD_PREP(LWMI_ATTR_TYPE_ID_MASK, type))
 
-#define LWMI_DEVICE_ID_FAN	0x04
+enum lwmi_device_id {
+	LWMI_DEVICE_ID_CPU = 0x01,
+	LWMI_DEVICE_ID_FAN = 0x04,
+};
 
 struct component_match;
 struct device;
diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index f3f12303e3798..2986993cbb6a7 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -54,15 +54,22 @@
 
 #define LENOVO_OTHER_MODE_GUID "DC2A8805-3A8C-41BA-A6F7-092E0089CD3B"
 
-#define LWMI_DEVICE_ID_CPU 0x01
-
-#define LWMI_FEATURE_ID_CPU_SPPT 0x01
-#define LWMI_FEATURE_ID_CPU_SPL 0x02
-#define LWMI_FEATURE_ID_CPU_FPPT 0x03
+enum lwmi_feature_id_cpu {
+	LWMI_FEATURE_ID_CPU_SPPT = 0x01,
+	LWMI_FEATURE_ID_CPU_SPL = 0x02,
+	LWMI_FEATURE_ID_CPU_FPPT = 0x03,
+	LWMI_FEATURE_ID_CPU_TEMP = 0x04,
+	LWMI_FEATURE_ID_CPU_APU = 0x05,
+	LWMI_FEATURE_ID_CPU_CL = 0x06,
+	LWMI_FEATURE_ID_CPU_TAU = 0x07,
+	LWMI_FEATURE_ID_CPU_OC = 0x08,
+	LWMI_FEATURE_ID_CPU_IPL = 0x09,
+};
 
 #define LWMI_FEATURE_ID_FAN_RPM 0x03
 
 #define LWMI_TYPE_ID_NONE 0x00
+#define LWMI_TYPE_ID_CROSSLOAD 0x01
 
 #define LWMI_FEATURE_VALUE_GET 17
 #define LWMI_FEATURE_VALUE_SET 18
@@ -559,18 +566,78 @@ static struct tunable_attr_01 ppt_pl1_spl = {
 	.type_id = LWMI_TYPE_ID_NONE,
 };
 
+static struct tunable_attr_01 ppt_pl1_spl_cl = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_SPL,
+	.type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
 static struct tunable_attr_01 ppt_pl2_sppt = {
 	.device_id = LWMI_DEVICE_ID_CPU,
 	.feature_id = LWMI_FEATURE_ID_CPU_SPPT,
 	.type_id = LWMI_TYPE_ID_NONE,
 };
 
+static struct tunable_attr_01 ppt_pl2_sppt_cl = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_SPPT,
+	.type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
 static struct tunable_attr_01 ppt_pl3_fppt = {
 	.device_id = LWMI_DEVICE_ID_CPU,
 	.feature_id = LWMI_FEATURE_ID_CPU_FPPT,
 	.type_id = LWMI_TYPE_ID_NONE,
 };
 
+static struct tunable_attr_01 ppt_pl3_fppt_cl = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_FPPT,
+	.type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
+static struct tunable_attr_01 cpu_temp = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_TEMP,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl1_apu_spl = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_APU,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_cpu_cl = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_CL,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl1_tau = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_TAU,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 cpu_oc_stat = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_OC,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl4_ipl = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_IPL,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 ppt_pl4_ipl_cl = {
+	.device_id = LWMI_DEVICE_ID_CPU,
+	.feature_id = LWMI_FEATURE_ID_CPU_IPL,
+	.type_id = LWMI_TYPE_ID_CROSSLOAD,
+};
+
 struct capdata01_attr_group {
 	const struct attribute_group *attr_group;
 	struct tunable_attr_01 *tunable_attr;
@@ -1009,17 +1076,48 @@ static int lwmi_attr_01_is_supported(struct tunable_attr_01 *tunable_attr)
 		.name = _fsname, .attrs = _attrname##_attrs               \
 	}
 
+LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_oc_stat, "cpu_oc_stat",
+			      "Set the CPU overclocking status");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_temp, "cpu_temp",
+			      "Set the CPU thermal load limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_cpu_cl, "ppt_cpu_cl",
+			      "Set the CPU cross loading power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_apu_spl, "ppt_pl1_apu_spl",
+			      "Set the APU sustained power limit");
 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl, "ppt_pl1_spl",
 			      "Set the CPU sustained power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl_cl, "ppt_pl1_spl_cl",
+			      "Set the CPU cross loading sustained power limit");
 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt, "ppt_pl2_sppt",
 			      "Set the CPU slow package power tracking limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt_cl, "ppt_pl2_sppt_cl",
+			      "Set the CPU cross loading slow package power tracking limit");
 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt, "ppt_pl3_fppt",
 			      "Set the CPU fast package power tracking limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt_cl, "ppt_pl3_fppt_cl",
+			      "Set the CPU cross loading fast package power tracking limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_tau, "ppt_pl1_tau",
+			      "Set the CPU sustained power limit exceed duration");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl, "ppt_pl4_ipl",
+			      "Set the CPU instantaneous power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl_cl, "ppt_pl4_ipl_cl",
+			      "Set the CPU cross loading instantaneous power limit");
+
 
 static struct capdata01_attr_group cd01_attr_groups[] = {
+	{ &cpu_oc_stat_attr_group, &cpu_oc_stat },
+	{ &cpu_temp_attr_group, &cpu_temp },
+	{ &ppt_cpu_cl_attr_group, &ppt_cpu_cl },
+	{ &ppt_pl1_apu_spl_attr_group, &ppt_pl1_apu_spl },
 	{ &ppt_pl1_spl_attr_group, &ppt_pl1_spl },
+	{ &ppt_pl1_spl_cl_attr_group, &ppt_pl1_spl_cl },
+	{ &ppt_pl1_tau_attr_group, &ppt_pl1_tau },
 	{ &ppt_pl2_sppt_attr_group, &ppt_pl2_sppt },
+	{ &ppt_pl2_sppt_cl_attr_group, &ppt_pl2_sppt_cl },
 	{ &ppt_pl3_fppt_attr_group, &ppt_pl3_fppt },
+	{ &ppt_pl3_fppt_cl_attr_group, &ppt_pl3_fppt_cl },
+	{ &ppt_pl4_ipl_attr_group, &ppt_pl4_ipl },
+	{ &ppt_pl4_ipl_cl_attr_group, &ppt_pl4_ipl_cl },
 	{},
 };
 
-- 
2.52.0

[PATCH v2 4/6] platform/x86: lenovo-wmi-other: Add GPU tunable attributes

[Derek J. Clark]

Use an enum for all GPU attribute feature ID's and add GPU attributes.

Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
 .../wmi/devices/lenovo-wmi-other.rst          |  11 ++
 drivers/platform/x86/lenovo/wmi-capdata.h     |   1 +
 drivers/platform/x86/lenovo/wmi-other.c       | 115 ++++++++++++++++++
 3 files changed, 127 insertions(+)

diff --git a/Documentation/wmi/devices/lenovo-wmi-other.rst b/Documentation/wmi/devices/lenovo-wmi-other.rst
index f4763ed66cc6d..f7564b23bb7f0 100644
--- a/Documentation/wmi/devices/lenovo-wmi-other.rst
+++ b/Documentation/wmi/devices/lenovo-wmi-other.rst
@@ -70,6 +70,17 @@ Each attribute has the following properties:
 The following firmware-attributes are implemented:
  - cpu_oc_stat: CPU Overlocking Status
  - cpu_temp: CPU Thermal Load Limit
+ - dgpu_boost_clk: Dedicated GPU Boost Clock
+ - dgpu_enable: Dedicated GPU Enabled Status
+ - gpu_didvid: GPU Device Identifier and Vendor Identifier
+ - gpu_mode: GPU Mode by Power Limit
+ - gpu_nv_ac_offset: Nvidia GPU AC Total Processing Power Baseline Offset
+ - gpu_nv_bpl: Nvidia GPU Base Power Limit
+ - gpu_nv_cpu_boost: Nvidia GPU to CPU Dynamic Boost Limit
+ - gpu_nv_ctgp: Nvidia GPU Configurable Total Graphics Power
+ - gpu_nv_ppab: Nvidia GPU Power Performance Aware Boost Limit
+ - gpu_oc_stat: GPU Overclocking Status
+ - gpu_temp: GPU Thermal Load Limit
  - ppt_cpu_cl: CPU Cross Loading Power Limit
  - ppt_pl1_apu_spl: Platform Profile Tracking APU Sustained Power Limit
  - ppt_pl1_spl: Platform Profile Tracking Sustained Power Limit
diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h
index aa48f43cbb43b..b7f9ee7b301a5 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.h
+++ b/drivers/platform/x86/lenovo/wmi-capdata.h
@@ -25,6 +25,7 @@
 
 enum lwmi_device_id {
 	LWMI_DEVICE_ID_CPU = 0x01,
+	LWMI_DEVICE_ID_GPU = 0x02,
 	LWMI_DEVICE_ID_FAN = 0x04,
 };
 
diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index 2986993cbb6a7..876834af838e0 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -66,6 +66,20 @@ enum lwmi_feature_id_cpu {
 	LWMI_FEATURE_ID_CPU_IPL = 0x09,
 };
 
+enum lwmi_feature_id_gpu {
+	LWMI_FEATURE_ID_GPU_NV_PPAB = 0x01,
+	LWMI_FEATURE_ID_GPU_NV_CTGP = 0x02,
+	LWMI_FEATURE_ID_GPU_TEMP = 0x03,
+	LWMI_FEATURE_ID_GPU_AC_OFFSET = 0x04,
+	LWMI_FEATURE_ID_GPU_OC = 0x05,
+	LWMI_FEATURE_ID_DGPU_BOOST_CLK = 0x06,
+	LWMI_FEATURE_ID_DGPU_EN = 0x07,
+	LWMI_FEATURE_ID_GPU_MODE = 0x08,
+	LWMI_FEATURE_ID_DGPU_DIDVID = 0x09,
+	LWMI_FEATURE_ID_GPU_NV_BPL = 0x0a,
+	LWMI_FEATURE_ID_GPU_NV_CPU_BOOST = 0x0b,
+};
+
 #define LWMI_FEATURE_ID_FAN_RPM 0x03
 
 #define LWMI_TYPE_ID_NONE 0x00
@@ -638,6 +652,72 @@ static struct tunable_attr_01 ppt_pl4_ipl_cl = {
 	.type_id = LWMI_TYPE_ID_CROSSLOAD,
 };
 
+static struct tunable_attr_01 gpu_nv_ppab = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_NV_PPAB,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_ctgp = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_NV_CTGP,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_temp = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_TEMP,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_ac_offset = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_AC_OFFSET,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_oc_stat = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_OC,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 dgpu_boost_clk = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_DGPU_BOOST_CLK,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 dgpu_enable = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_DGPU_EN,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_mode = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_MODE,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 dgpu_didvid = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_DGPU_DIDVID,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_bpl = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_NV_BPL,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_cpu_boost = {
+	.device_id = LWMI_DEVICE_ID_GPU,
+	.feature_id = LWMI_FEATURE_ID_GPU_NV_CPU_BOOST,
+	.type_id = LWMI_TYPE_ID_NONE,
+};
+
 struct capdata01_attr_group {
 	const struct attribute_group *attr_group;
 	struct tunable_attr_01 *tunable_attr;
@@ -1076,6 +1156,7 @@ static int lwmi_attr_01_is_supported(struct tunable_attr_01 *tunable_attr)
 		.name = _fsname, .attrs = _attrname##_attrs               \
 	}
 
+/* CPU tunable attributes */
 LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_oc_stat, "cpu_oc_stat",
 			      "Set the CPU overclocking status");
 LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_temp, "cpu_temp",
@@ -1103,10 +1184,44 @@ LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl, "ppt_pl4_ipl",
 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl_cl, "ppt_pl4_ipl_cl",
 			      "Set the CPU cross loading instantaneous power limit");
 
+/* GPU tunable attributes */
+LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_boost_clk, "gpu_boost_clk",
+			      "Set the dedicated GPU boost clock");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_didvid, "gpu_didvid",
+			      "Get the GPU device identifier and vendor identifier");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_enable, "dgpu_enable",
+			      "Set the dedicated Nvidia GPU enabled status");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_mode, "gpu_mode",
+			      "Set the GPU mode by power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ac_offset, "gpu_nv_ac_offset",
+			      "Set the Nvidia GPU AC total processing power baseline offset");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_bpl, "gpu_nv_bpl",
+			      "Set the Nvidia GPU base power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_cpu_boost, "gpu_nv_cpu_boost",
+			      "Set the Nvidia GPU to CPU dynamic boost limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ctgp, "gpu_nv_ctgp",
+			      "Set the GPU configurable total graphics power");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ppab, "gpu_nv_ppab",
+			      "Set the Nvidia GPU power performance aware boost limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_oc_stat, "gpu_oc_stat",
+			      "Set the GPU overclocking status");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_temp, "gpu_temp",
+			      "Set the GPU thermal load limit");
 
 static struct capdata01_attr_group cd01_attr_groups[] = {
 	{ &cpu_oc_stat_attr_group, &cpu_oc_stat },
 	{ &cpu_temp_attr_group, &cpu_temp },
+	{ &dgpu_boost_clk_attr_group, &dgpu_boost_clk },
+	{ &dgpu_didvid_attr_group, &dgpu_didvid },
+	{ &dgpu_enable_attr_group, &dgpu_enable },
+	{ &gpu_mode_attr_group, &gpu_mode },
+	{ &gpu_nv_ac_offset_attr_group, &gpu_nv_ac_offset },
+	{ &gpu_nv_bpl_attr_group, &gpu_nv_bpl },
+	{ &gpu_nv_cpu_boost_attr_group, &gpu_nv_cpu_boost },
+	{ &gpu_nv_ctgp_attr_group, &gpu_nv_ctgp },
+	{ &gpu_nv_ppab_attr_group, &gpu_nv_ppab },
+	{ &gpu_oc_stat_attr_group, &gpu_oc_stat },
+	{ &gpu_temp_attr_group, &gpu_temp },
 	{ &ppt_cpu_cl_attr_group, &ppt_cpu_cl },
 	{ &ppt_pl1_apu_spl_attr_group, &ppt_pl1_apu_spl },
 	{ &ppt_pl1_spl_attr_group, &ppt_pl1_spl },
-- 
2.52.0

[PATCH v2 5/6] platform-x86: lenovo-wmi-other: Consolidate name into single const

[Derek J. Clark]

In the next patch a power supply extension is added which requires
a name attribute. Instead of creating a third const macro with the
same information, replace LWMI_OM_FW_ATTR_BASE_PATH and
LWMI_OM_HWMON_NAME with LWMI_OM_NAME and use that everywhere.

Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
 drivers/platform/x86/lenovo/wmi-other.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index 876834af838e0..8e52f692f8605 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -92,14 +92,13 @@ enum lwmi_feature_id_gpu {
 #define LWMI_FAN_NR 4
 #define LWMI_FAN_ID(x) ((x) + LWMI_FAN_ID_BASE)
 
+#define LWMI_FAN_DIV 100
+
 #define LWMI_ATTR_ID_FAN_RPM(x)                                   \
 	LWMI_ATTR_ID(LWMI_DEVICE_ID_FAN, LWMI_FEATURE_ID_FAN_RPM, \
 		     LWMI_GZ_THERMAL_MODE_NONE, LWMI_FAN_ID(x))
 
-#define LWMI_FAN_DIV 100
-
-#define LWMI_OM_FW_ATTR_BASE_PATH "lenovo-wmi-other"
-#define LWMI_OM_HWMON_NAME "lenovo_wmi_other"
+#define LWMI_OM_NAME "lenovo-wmi-other"
 
 static BLOCKING_NOTIFIER_HEAD(om_chain_head);
 static DEFINE_IDA(lwmi_om_ida);
@@ -454,7 +453,7 @@ static void lwmi_om_hwmon_add(struct lwmi_om_priv *priv)
 	}
 
 	priv->hwmon_dev = hwmon_device_register_with_info(&priv->wdev->dev,
-							  LWMI_OM_HWMON_NAME, priv,
+							  LWMI_OM_NAME, priv,
 							  &lwmi_om_hwmon_chip_info,
 							  NULL);
 	if (IS_ERR(priv->hwmon_dev)) {
@@ -1253,8 +1252,7 @@ static int lwmi_om_fw_attr_add(struct lwmi_om_priv *priv)
 
 	priv->fw_attr_dev = device_create(&firmware_attributes_class, NULL,
 					  MKDEV(0, 0), NULL, "%s-%u",
-					  LWMI_OM_FW_ATTR_BASE_PATH,
-					  priv->ida_id);
+					  LWMI_OM_NAME, priv->ida_id);
 	if (IS_ERR(priv->fw_attr_dev)) {
 		err = PTR_ERR(priv->fw_attr_dev);
 		goto err_free_ida;
-- 
2.52.0

[PATCH v2 6/6] platform/x86: lenovo-wmi-other: Add WMI battery charge limiting.

[Derek J. Clark]

Add charge-type power supply extension for devices that support WMI based
charge enable/disable. Lenovo Legion devices that implement function ID
and capdata 00 ID 0x03010001 are able to enable or disable charging
through the lenovo-wmi-other interface. The ideapad_laptop driver
conflicts with this if it can also provide the attribute, so we have to
get the acpi_handle and check for the same ACPI methods that enable the
feature in that driver. The ACPI method is more reliable from my testing
when both are present, so there is no need to modify the ideapad_laptop
driver instead.

Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
 drivers/platform/x86/lenovo/wmi-capdata.h |   1 +
 drivers/platform/x86/lenovo/wmi-other.c   | 229 ++++++++++++++++++++++
 2 files changed, 230 insertions(+)

diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h
index b7f9ee7b301a5..00471551e7d60 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.h
+++ b/drivers/platform/x86/lenovo/wmi-capdata.h
@@ -26,6 +26,7 @@
 enum lwmi_device_id {
 	LWMI_DEVICE_ID_CPU = 0x01,
 	LWMI_DEVICE_ID_GPU = 0x02,
+	LWMI_DEVICE_ID_PSU = 0x03,
 	LWMI_DEVICE_ID_FAN = 0x04,
 };
 
diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index 8e52f692f8605..7b6074062a09d 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -26,6 +26,7 @@
  *   - binding to Capability Data 00 and Fan
  */
 
+#include <acpi/battery.h>
 #include <linux/acpi.h>
 #include <linux/bitfield.h>
 #include <linux/cleanup.h>
@@ -42,6 +43,7 @@
 #include <linux/module.h>
 #include <linux/notifier.h>
 #include <linux/platform_profile.h>
+#include <linux/power_supply.h>
 #include <linux/types.h>
 #include <linux/wmi.h>
 
@@ -80,10 +82,17 @@ enum lwmi_feature_id_gpu {
 	LWMI_FEATURE_ID_GPU_NV_CPU_BOOST = 0x0b,
 };
 
+enum lwmi_feature_id_psu {
+	LWMI_FEATURE_ID_PSU_INSTANT_MODE = 0x01,
+	LWMI_FEATURE_ID_PSU_CHARGE_MODE = 0x02,
+};
+
 #define LWMI_FEATURE_ID_FAN_RPM 0x03
 
 #define LWMI_TYPE_ID_NONE 0x00
 #define LWMI_TYPE_ID_CROSSLOAD 0x01
+#define LWMI_TYPE_ID_PSU_AC 0x01
+#define LWMI_TYPE_ID_PSU_PD 0x02
 
 #define LWMI_FEATURE_VALUE_GET 17
 #define LWMI_FEATURE_VALUE_SET 18
@@ -94,10 +103,17 @@ enum lwmi_feature_id_gpu {
 
 #define LWMI_FAN_DIV 100
 
+#define LWMI_CHARGE_MODE_ENABLED	0x00
+#define LWMI_CHARGE_MODE_DISABLED	0x01
+
 #define LWMI_ATTR_ID_FAN_RPM(x)                                   \
 	LWMI_ATTR_ID(LWMI_DEVICE_ID_FAN, LWMI_FEATURE_ID_FAN_RPM, \
 		     LWMI_GZ_THERMAL_MODE_NONE, LWMI_FAN_ID(x))
 
+#define LWMI_ATTR_ID_PSU(feat, type)		\
+	LWMI_ATTR_ID(LWMI_DEVICE_ID_PSU, feat,		\
+		     LWMI_GZ_THERMAL_MODE_NONE, type)
+
 #define LWMI_OM_NAME "lenovo-wmi-other"
 
 static BLOCKING_NOTIFIER_HEAD(om_chain_head);
@@ -138,6 +154,8 @@ struct lwmi_om_priv {
 		bool capdata00_collected : 1;
 		bool capdata_fan_collected : 1;
 	} fan_flags;
+
+	struct acpi_battery_hook battery_hook;
 };
 
 /*
@@ -562,6 +580,216 @@ static void lwmi_om_fan_info_collect_cd_fan(struct device *dev, struct cd_list *
 	lwmi_om_hwmon_add(priv);
 }
 
+/* ======== Power Supply Extension (component: lenovo-wmi-capdata 00) ======== */
+
+/**
+ * lwmi_psy_ext_get_prop() - Get a power_supply_ext property
+ * @ps: The battery that was extended
+ * @ext: The extension
+ * @ext_data: Pointer the lwmi_om_priv drvdata
+ * @prop: The property to read
+ * @val: The value to return
+ *
+ * Writes the given value to the power_supply_ext property
+ *
+ * Return: 0 on success, or an error
+ */
+static int lwmi_psy_ext_get_prop(struct power_supply *ps,
+				 const struct power_supply_ext *ext,
+				 void *ext_data,
+				 enum power_supply_property prop,
+				 union power_supply_propval *val)
+{
+	struct lwmi_om_priv *priv = ext_data;
+	struct wmi_method_args_32 args;
+	u32 retval;
+	int ret;
+
+	args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_INSTANT_MODE, LWMI_TYPE_ID_PSU_AC);
+
+	ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
+				    (unsigned char *)&args, sizeof(args),
+				    &retval);
+	if (ret)
+		return ret;
+
+	dev_dbg(&priv->wdev->dev, "Got return value %x for property %x\n", retval, prop);
+
+	if (retval == LWMI_CHARGE_MODE_DISABLED)
+		val->intval = POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
+	else
+		val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
+
+	return 0;
+}
+
+/**
+ * lwmi_psy_ext_set_prop() - Set a power_supply_ext property
+ * @ps: The battery that was extended
+ * @ext: The extension
+ * @ext_data: Pointer the lwmi_om_priv drvdata
+ * @prop: The property to write
+ * @val: The value to write
+ *
+ * Writes the given value to the power_supply_ext property
+ *
+ * Return: 0 on success, or an error
+ */
+static int lwmi_psy_ext_set_prop(struct power_supply *ps,
+				 const struct power_supply_ext *ext,
+				 void *ext_data,
+				 enum power_supply_property prop,
+				 const union power_supply_propval *val)
+{
+	struct lwmi_om_priv *priv = ext_data;
+	struct wmi_method_args_32 args;
+
+	args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_INSTANT_MODE, LWMI_TYPE_ID_PSU_AC);
+	if (val->intval == POWER_SUPPLY_CHARGE_TYPE_LONGLIFE)
+		args.arg1 = LWMI_CHARGE_MODE_DISABLED;
+	else
+		args.arg1 = LWMI_CHARGE_MODE_ENABLED;
+
+	dev_dbg(&priv->wdev->dev, "Attempting to set %#08x for property %x to %x\n",
+		args.arg0, prop, args.arg1);
+
+	return lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
+				     (unsigned char *)&args, sizeof(args), NULL);
+}
+
+/**
+ * lwmi_psy_prop_is_writeable() - Determine if the property is supported
+ * @ps: The battery that was extended
+ * @ext: The extension
+ * @ext_data: Pointer the lwmi_om_priv drvdata
+ * @prop: The property to check
+ *
+ * Checks capdata 00 to determine if the property is supported.
+ *
+ * Return: Support level, or false
+ */
+static int lwmi_psy_prop_is_writeable(struct power_supply *ps,
+				      const struct power_supply_ext *ext,
+				      void *ext_data,
+				      enum power_supply_property prop)
+{
+	struct lwmi_om_priv *priv = ext_data;
+	struct capdata00 capdata;
+	u32 attribute_id = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_INSTANT_MODE, LWMI_TYPE_ID_PSU_AC);
+	int ret;
+
+	ret = lwmi_cd00_get_data(priv->cd00_list, attribute_id, &capdata);
+	if (ret)
+		return false;
+
+	dev_dbg(&priv->wdev->dev, "Battery charge mode (%#08x) support level: %x\n",
+		attribute_id, capdata.supported);
+
+	return capdata.supported;
+}
+
+static const enum power_supply_property lwmi_psy_ext_props[] = {
+	POWER_SUPPLY_PROP_CHARGE_TYPES,
+};
+
+static const struct power_supply_ext lwmi_psy_ext = {
+	.name			= LWMI_OM_NAME,
+	.properties		= lwmi_psy_ext_props,
+	.num_properties		= ARRAY_SIZE(lwmi_psy_ext_props),
+	.charge_types		= (BIT(POWER_SUPPLY_CHARGE_TYPE_STANDARD) |
+				   BIT(POWER_SUPPLY_CHARGE_TYPE_LONGLIFE)),
+	.get_property		= lwmi_psy_ext_get_prop,
+	.set_property		= lwmi_psy_ext_set_prop,
+	.property_is_writeable	= lwmi_psy_prop_is_writeable,
+};
+
+/**
+ * lwmi_add_battery() - Connect the power_supply_ext
+ * @battery: The battery to extend
+ * @hook: The driver hook used to extend the battery
+ *
+ * Return: 0 on success, or an error.
+ */
+static int lwmi_add_battery(struct power_supply *battery, struct acpi_battery_hook *hook)
+{
+	struct lwmi_om_priv *priv = container_of(hook, struct lwmi_om_priv, battery_hook);
+
+	return power_supply_register_extension(battery, &lwmi_psy_ext, &priv->wdev->dev, priv);
+}
+
+/**
+ * lwmi_remove_battery() - Disconnect the power_supply_ext
+ * @battery: The battery that was extended
+ * @hook: The driver hook used to extend the battery
+ *
+ * Return: 0 on success, or an error.
+ */
+static int lwmi_remove_battery(struct power_supply *battery, struct acpi_battery_hook *hook)
+{
+	power_supply_unregister_extension(battery, &lwmi_psy_ext);
+	return 0;
+}
+
+/**
+ * lwmi_acpi_match() - Attempts to return the ideapad acpi handle
+ * @handle: The ACPI handle that manages battery charging
+ * @lvl: Unused
+ * @context: Void pointer to the acpi_handle object to return
+ * @retval: Unused
+ *
+ * Checks if the ideapad_laptop driver is going to manage charge_type first,
+ * then if not, hooks the battery to our WMI methods.
+ *
+ * Return: AE_CTRL_TERMINATE if found, AE_OK if not found.
+ */
+static acpi_status lwmi_acpi_match(acpi_handle handle, u32 lvl,
+				   void *context, void **retval)
+{
+	if (!handle)
+		return AE_OK;
+
+	acpi_handle *ahand = context;
+	*ahand = handle;
+
+	return AE_CTRL_TERMINATE;
+}
+
+/**
+ * lwmi_om_ps_ext_init() - Hooks power supply extension to device battery
+ * @priv: Driver private data
+ *
+ * Checks if the ideapad_laptop driver is going to manage charge_type first,
+ * then if not, hooks the battery to our WMI methods.
+ */
+static void lwmi_om_ps_ext_init(struct lwmi_om_priv *priv)
+{
+	static const char * const ideapad_hid = "VPC2004";
+	acpi_handle handle = NULL;
+	int ret;
+
+	/* Deconflict ideapad_laptop driver */
+	ret = acpi_get_devices(ideapad_hid, lwmi_acpi_match, &handle, NULL);
+	if (ret)
+		return;
+
+	if (!handle)
+		return;
+
+	if (acpi_has_method(handle, "GBMD") && acpi_has_method(handle, "SBMC")) {
+		dev_dbg(&priv->wdev->dev, "ideapad_laptop driver manages battery for device.\n");
+		return;
+	}
+
+	/* Add battery hooks */
+	priv->battery_hook.add_battery	= lwmi_add_battery,
+	priv->battery_hook.remove_battery	= lwmi_remove_battery,
+	priv->battery_hook.name		= "Lenovo WMI Other Battery Extension",
+
+	ret = devm_battery_hook_register(&priv->wdev->dev, &priv->battery_hook);
+	if (ret)
+		dev_err(&priv->wdev->dev, "Error during battery hook: %i\n", ret);
+}
+
 /* ======== fw_attributes (component: lenovo-wmi-capdata 01) ======== */
 
 struct tunable_attr_01 {
@@ -1344,6 +1572,7 @@ static int lwmi_om_master_bind(struct device *dev)
 		return -ENODEV;
 
 	lwmi_om_fan_info_collect_cd00(priv);
+	lwmi_om_ps_ext_init(priv);
 
 	return lwmi_om_fw_attr_add(priv);
 }
-- 
2.52.0

Re: [PATCH v2 5/6] platform-x86: lenovo-wmi-other: Consolidate name into single const

[Kurt Borja]

On Sun Feb 15, 2026 at 1:12 AM -05, Derek J. Clark wrote:
> In the next patch a power supply extension is added which requires
> a name attribute. Instead of creating a third const macro with the
> same information, replace LWMI_OM_FW_ATTR_BASE_PATH and
> LWMI_OM_HWMON_NAME with LWMI_OM_NAME and use that everywhere.
>
> Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
> ---
>  drivers/platform/x86/lenovo/wmi-other.c | 12 +++++-------
>  1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
> index 876834af838e0..8e52f692f8605 100644
> --- a/drivers/platform/x86/lenovo/wmi-other.c
> +++ b/drivers/platform/x86/lenovo/wmi-other.c
> @@ -92,14 +92,13 @@ enum lwmi_feature_id_gpu {
>  #define LWMI_FAN_NR 4
>  #define LWMI_FAN_ID(x) ((x) + LWMI_FAN_ID_BASE)
>  
> +#define LWMI_FAN_DIV 100
> +
>  #define LWMI_ATTR_ID_FAN_RPM(x)                                   \
>  	LWMI_ATTR_ID(LWMI_DEVICE_ID_FAN, LWMI_FEATURE_ID_FAN_RPM, \
>  		     LWMI_GZ_THERMAL_MODE_NONE, LWMI_FAN_ID(x))
>  
> -#define LWMI_FAN_DIV 100
> -
> -#define LWMI_OM_FW_ATTR_BASE_PATH "lenovo-wmi-other"
> -#define LWMI_OM_HWMON_NAME "lenovo_wmi_other"
> +#define LWMI_OM_NAME "lenovo-wmi-other"

Hi Derek,

This name doesn't work for HWMON because the core forbids dashes '-'
(see [1]).

>  
>  static BLOCKING_NOTIFIER_HEAD(om_chain_head);
>  static DEFINE_IDA(lwmi_om_ida);
> @@ -454,7 +453,7 @@ static void lwmi_om_hwmon_add(struct lwmi_om_priv *priv)
>  	}
>  
>  	priv->hwmon_dev = hwmon_device_register_with_info(&priv->wdev->dev,
> -							  LWMI_OM_HWMON_NAME, priv,
> +							  LWMI_OM_NAME, priv,
>  							  &lwmi_om_hwmon_chip_info,
>  							  NULL);
>  	if (IS_ERR(priv->hwmon_dev)) {
> @@ -1253,8 +1252,7 @@ static int lwmi_om_fw_attr_add(struct lwmi_om_priv *priv)
>  
>  	priv->fw_attr_dev = device_create(&firmware_attributes_class, NULL,
>  					  MKDEV(0, 0), NULL, "%s-%u",
> -					  LWMI_OM_FW_ATTR_BASE_PATH,
> -					  priv->ida_id);
> +					  LWMI_OM_NAME, priv->ida_id);
>  	if (IS_ERR(priv->fw_attr_dev)) {
>  		err = PTR_ERR(priv->fw_attr_dev);
>  		goto err_free_ida;

[1] https://elixir.bootlin.com/linux/v6.19-rc5/source/drivers/hwmon/hwmon.c#L910

-- 
Thanks,
 ~ Kurt

Re: [PATCH v2 5/6] platform-x86: lenovo-wmi-other: Consolidate name into single const

[Derek J. Clark]

On February 14, 2026 10:56:24 PM PST, Kurt Borja <kuurtb@gmail.com> wrote:
>On Sun Feb 15, 2026 at 1:12 AM -05, Derek J. Clark wrote:
>> In the next patch a power supply extension is added which requires
>> a name attribute. Instead of creating a third const macro with the
>> same information, replace LWMI_OM_FW_ATTR_BASE_PATH and
>> LWMI_OM_HWMON_NAME with LWMI_OM_NAME and use that everywhere.
>>
>> Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
>> ---
>>  drivers/platform/x86/lenovo/wmi-other.c | 12 +++++-------
>>  1 file changed, 5 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
>> index 876834af838e0..8e52f692f8605 100644
>> --- a/drivers/platform/x86/lenovo/wmi-other.c
>> +++ b/drivers/platform/x86/lenovo/wmi-other.c
>> @@ -92,14 +92,13 @@ enum lwmi_feature_id_gpu {
>>  #define LWMI_FAN_NR 4
>>  #define LWMI_FAN_ID(x) ((x) + LWMI_FAN_ID_BASE)
>>  
>> +#define LWMI_FAN_DIV 100
>> +
>>  #define LWMI_ATTR_ID_FAN_RPM(x)                                   \
>>  	LWMI_ATTR_ID(LWMI_DEVICE_ID_FAN, LWMI_FEATURE_ID_FAN_RPM, \
>>  		     LWMI_GZ_THERMAL_MODE_NONE, LWMI_FAN_ID(x))
>>  
>> -#define LWMI_FAN_DIV 100
>> -
>> -#define LWMI_OM_FW_ATTR_BASE_PATH "lenovo-wmi-other"
>> -#define LWMI_OM_HWMON_NAME "lenovo_wmi_other"
>> +#define LWMI_OM_NAME "lenovo-wmi-other"
>
>Hi Derek,
>
>This name doesn't work for HWMON because the core forbids dashes '-'
>(see [1]).
>

Ah, well shoot. I'll restore that in v3. Attention to detail...

Thanks,
Derek

>>  
>>  static BLOCKING_NOTIFIER_HEAD(om_chain_head);
>>  static DEFINE_IDA(lwmi_om_ida);
>> @@ -454,7 +453,7 @@ static void lwmi_om_hwmon_add(struct lwmi_om_priv *priv)
>>  	}
>>  
>>  	priv->hwmon_dev = hwmon_device_register_with_info(&priv->wdev->dev,
>> -							  LWMI_OM_HWMON_NAME, priv,
>> +							  LWMI_OM_NAME, priv,
>>  							  &lwmi_om_hwmon_chip_info,
>>  							  NULL);
>>  	if (IS_ERR(priv->hwmon_dev)) {
>> @@ -1253,8 +1252,7 @@ static int lwmi_om_fw_attr_add(struct lwmi_om_priv *priv)
>>  
>>  	priv->fw_attr_dev = device_create(&firmware_attributes_class, NULL,
>>  					  MKDEV(0, 0), NULL, "%s-%u",
>> -					  LWMI_OM_FW_ATTR_BASE_PATH,
>> -					  priv->ida_id);
>> +					  LWMI_OM_NAME, priv->ida_id);
>>  	if (IS_ERR(priv->fw_attr_dev)) {
>>  		err = PTR_ERR(priv->fw_attr_dev);
>>  		goto err_free_ida;
>
>[1] https://elixir.bootlin.com/linux/v6.19-rc5/source/drivers/hwmon/hwmon.c#L910
>

Re: [PATCH v2 6/6] platform/x86: lenovo-wmi-other: Add WMI battery charge limiting.

[kernel test robot]

Hi Derek,

kernel test robot noticed the following build errors:

[auto build test ERROR on 5a5203a45b063a594e89a2aeaf9e4923893a5b4c]

url:    https://github.com/intel-lab-lkp/linux/commits/Derek-J-Clark/platform-x86-lenovo-wmi-other-Add-LWMI_ATTR_ID-Macro/20260215-141750
base:   5a5203a45b063a594e89a2aeaf9e4923893a5b4c
patch link:    https://lore.kernel.org/r/20260215061339.2842486-7-derekjohn.clark%40gmail.com
patch subject: [PATCH v2 6/6] platform/x86: lenovo-wmi-other: Add WMI battery charge limiting.
config: x86_64-buildonly-randconfig-006-20260215 (https://download.01.org/0day-ci/archive/20260215/202602152344.7wTkiRM4-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260215/202602152344.7wTkiRM4-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602152344.7wTkiRM4-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: vmlinux.o: in function `lwmi_om_master_bind':
>> wmi-other.c:(.text+0x4fbcbab): undefined reference to `devm_battery_hook_register'

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v2 6/6] platform/x86: lenovo-wmi-other: Add WMI battery charge limiting.

[kernel test robot]

Hi Derek,

kernel test robot noticed the following build errors:

[auto build test ERROR on 5a5203a45b063a594e89a2aeaf9e4923893a5b4c]

url:    https://github.com/intel-lab-lkp/linux/commits/Derek-J-Clark/platform-x86-lenovo-wmi-other-Add-LWMI_ATTR_ID-Macro/20260215-141750
base:   5a5203a45b063a594e89a2aeaf9e4923893a5b4c
patch link:    https://lore.kernel.org/r/20260215061339.2842486-7-derekjohn.clark%40gmail.com
patch subject: [PATCH v2 6/6] platform/x86: lenovo-wmi-other: Add WMI battery charge limiting.
config: i386-randconfig-003-20260215 (https://download.01.org/0day-ci/archive/20260216/202602160335.x6UNh7ba-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260216/202602160335.x6UNh7ba-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602160335.x6UNh7ba-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: devm_battery_hook_register
   >>> referenced by wmi-other.c:788 (drivers/platform/x86/lenovo/wmi-other.c:788)
   >>>               vmlinux.o:(lwmi_om_master_bind)

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v2 0/6] platform-x86: lenovo-wmi: Add fixes and enhancement

[Mark Pearson]

On Sun, Feb 15, 2026, at 1:12 AM, Derek J. Clark wrote:
> This series adds many much needed features and fixes to the lenovo-wmi
> drivers.
>
> Patch 1 adds a macro to make assigning attribute ID's for capdata
> cleaner and easier.
> Patch 2 addresses bugs where devices that don't support exposed
> attributes would still create the attribute, and also attempts to
> identify the correct capdata and set/get methods as some legacy
> interfaces don't use the custom mode in the method or capdata ID.
> Patch 3 adds the remaining CPU attributes that weren't previously
> exposed.
> Patch 4 adds the GPU attributes that weren't previously exposed.
> Patch 5 consolidates name constants in preparation for patch 6.
> Patch 6 adds battery charge-type limiting when supported only by WMI.
>
> After applying Rong's series from
> https://lore.kernel.org/platform-driver-x86/20260210191938.137234-1-i@rong.moe/
> I found that there weren't any conflicts, so rather than combine
> the series we can just review each separately.
>
> Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
> ---
> v2:
>  - Fix gpu_mode misisng from attributes list.
>  - Fix prototypes for power suppy patch.
>  - Reorganize CPU and GPU attributes alphabetically.
>  - Break out the patch consolidating the driver name cost.
>  - Move some of the refactoring of attribute_id back to into patch 1
>    where it belongs.
>  - Fix some additional typos in function prototypes.
> v1: 
> https://lore.kernel.org/platform-driver-x86/20260213081243.794288-1-derekjohn.clark@gmail.com/
>
> Derek J. Clark (6):
>   platform/x86: lenovo-wmi-other: Add LWMI_ATTR_ID Macro
>   platform/x86: lenovo-wmi-other: Limit adding attributes to supported
>     devices
>   platform/x86: lenovo-wmi-other: Add missing CPU tunable attributes
>   platform/x86: lenovo-wmi-other: Add GPU tunable attributes
>   platform-x86: lenovo-wmi-other: Consolidate name into single const
>   platform/x86: lenovo-wmi-other: Add WMI battery charge limiting.
>
>  .../wmi/devices/lenovo-wmi-other.rst          |  21 +
>  drivers/platform/x86/lenovo/wmi-capdata.h     |  13 +-
>  drivers/platform/x86/lenovo/wmi-gamezone.h    |   1 +
>  drivers/platform/x86/lenovo/wmi-other.c       | 606 ++++++++++++++++--
>  4 files changed, 592 insertions(+), 49 deletions(-)
>
>
> base-commit: 5a5203a45b063a594e89a2aeaf9e4923893a5b4c
> -- 
> 2.52.0

For the series - looked good to me (I didn't know the hwmon limitation Kurt highlighted)
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Mark

Re: [PATCH v2 2/6] platform/x86: lenovo-wmi-other: Limit adding attributes to supported devices

[Mark Pearson]

On Sun, Feb 15, 2026, at 1:12 AM, Derek J. Clark wrote:
> Adds lwmi_is_attr_01_supported, and only creates the attribute subfolder
> if the attribute is supported by the hardware. Due to some poorly
> implemented BIOS, this is a multi-step sequence of events. This is
> because:
> - Some BIOS support getting the capability data from custom mode (0xff),
>   while others only support it in no-mode (0x00).
> - Similarly, some BIOS support get/set for the current value from custom
>   mode (0xff), while others only support it in no-mode (0x00).
> - Some BIOS report capability data for a method that is not fully
>   implemented.
> - Some BIOS have methods fully implemented, but no complimentary
>   capability data.
>
> To ensure we only expose fully implemented methods with corresponding
> capability data, we check each outcome before reporting that an
> attribute can be supported.
>

The Legion's aren't in the Linux program (with an asterisk for the Legion Go/Go2) - but if there's anywhere it's tracked or highlighted which platforms differ/have issues let me know. Not sure how widespread the issues is?

I can try and let the Legion team know that there are platforms which (likely) aren't following the internal specs. It might be possible to improve things for future platforms?

Mark

Re: [PATCH v2 2/6] platform/x86: lenovo-wmi-other: Limit adding attributes to supported devices

[Derek J. Clark]

On February 17, 2026 3:54:09 PM PST, Mark Pearson <mpearson-lenovo@squebb.ca> wrote:
>On Sun, Feb 15, 2026, at 1:12 AM, Derek J. Clark wrote:
>> Adds lwmi_is_attr_01_supported, and only creates the attribute subfolder
>> if the attribute is supported by the hardware. Due to some poorly
>> implemented BIOS, this is a multi-step sequence of events. This is
>> because:
>> - Some BIOS support getting the capability data from custom mode (0xff),
>>   while others only support it in no-mode (0x00).
>> - Similarly, some BIOS support get/set for the current value from custom
>>   mode (0xff), while others only support it in no-mode (0x00).
>> - Some BIOS report capability data for a method that is not fully
>>   implemented.
>> - Some BIOS have methods fully implemented, but no complimentary
>>   capability data.
>>
>> To ensure we only expose fully implemented methods with corresponding
>> capability data, we check each outcome before reporting that an
>> attribute can be supported.
>>
>
>The Legion's aren't in the Linux program (with an asterisk for the Legion Go/Go2) - but if there's anywhere it's tracked or highlighted which platforms differ/have issues let me know. Not sure how widespread the issues is?
>
>I can try and let the Legion team know that there are platforms which (likely) aren't following the internal specs. It might be possible to improve things for future platforms?
>
>Mark

It's a mixture of different generations and models with different issues, I'm not really tracking it anywhere. Part of the issue is the spec has added/updated methods over time and the deprecated ones are still being used by hardware out in the world. I think this pattern is fairly good for most things. TBS I've recently found (from testers) that some things just need dedicated methods instead of the generic macros (CPU/GPU OC status for example) so I'll drop any of those in the series for now and add them back later. All in all IDK if there is much value in tracking these issues outside bug reports, as fixing them would likely require BIOS updates for hardware that is 2-4 generations old at this point and I highly doubt Lenovo intends to do something like that.

It's a fairly complicated and evolving spec, so my goal is to be at least 95% compatible. I don't think we'll be at 100% ever due to the wide array of different hardware that's available. I.e. the latest spec has ARM specific capdata as well so we may need to eventually move the driver to somewhere else, maybe platform/wmi? That's a discussion for later though as I have no experience with DT/ARM or a device that has it.

- Derek

Re: [PATCH v2 2/6] platform/x86: lenovo-wmi-other: Limit adding attributes to supported devices

[Mark Pearson]

On Tue, Feb 17, 2026, at 7:20 PM, Derek J. Clark wrote:
> On February 17, 2026 3:54:09 PM PST, Mark Pearson 
> <mpearson-lenovo@squebb.ca> wrote:
>>On Sun, Feb 15, 2026, at 1:12 AM, Derek J. Clark wrote:
>>> Adds lwmi_is_attr_01_supported, and only creates the attribute subfolder
>>> if the attribute is supported by the hardware. Due to some poorly
>>> implemented BIOS, this is a multi-step sequence of events. This is
>>> because:
>>> - Some BIOS support getting the capability data from custom mode (0xff),
>>>   while others only support it in no-mode (0x00).
>>> - Similarly, some BIOS support get/set for the current value from custom
>>>   mode (0xff), while others only support it in no-mode (0x00).
>>> - Some BIOS report capability data for a method that is not fully
>>>   implemented.
>>> - Some BIOS have methods fully implemented, but no complimentary
>>>   capability data.
>>>
>>> To ensure we only expose fully implemented methods with corresponding
>>> capability data, we check each outcome before reporting that an
>>> attribute can be supported.
>>>
>>
>>The Legion's aren't in the Linux program (with an asterisk for the Legion Go/Go2) - but if there's anywhere it's tracked or highlighted which platforms differ/have issues let me know. Not sure how widespread the issues is?
>>
>>I can try and let the Legion team know that there are platforms which (likely) aren't following the internal specs. It might be possible to improve things for future platforms?
>>
>>Mark
>
> It's a mixture of different generations and models with different 
> issues, I'm not really tracking it anywhere. Part of the issue is the 
> spec has added/updated methods over time and the deprecated ones are 
> still being used by hardware out in the world. I think this pattern is 
> fairly good for most things. TBS I've recently found (from testers) 
> that some things just need dedicated methods instead of the generic 
> macros (CPU/GPU OC status for example) so I'll drop any of those in the 
> series for now and add them back later. All in all IDK if there is much 
> value in tracking these issues outside bug reports, as fixing them 
> would likely require BIOS updates for hardware that is 2-4 generations 
> old at this point and I highly doubt Lenovo intends to do something 
> like that.
>
> It's a fairly complicated and evolving spec, so my goal is to be at 
> least 95% compatible. I don't think we'll be at 100% ever due to the 
> wide array of different hardware that's available. I.e. the latest spec 
> has ARM specific capdata as well so we may need to eventually move the 
> driver to somewhere else, maybe platform/wmi? That's a discussion for 
> later though as I have no experience with DT/ARM or a device that has 
> it.
>
Got it - thanks!
(and yeah - chances of getting changes done to older platforms is.....small)
Mark