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Message-ID: <20251019210450.88830-4-i@rong.moe>
Date: Mon, 20 Oct 2025 05:04:46 +0800
From: Rong Zhang <i@...g.moe>
To: Mark Pearson <mpearson-lenovo@...ebb.ca>,
"Derek J. Clark" <derekjohn.clark@...il.com>,
Armin Wolf <W_Armin@....de>,
Hans de Goede <hansg@...nel.org>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Rong Zhang <i@...g.moe>,
Guenter Roeck <linux@...ck-us.net>,
platform-driver-x86@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-hwmon@...r.kernel.org
Subject: [PATCH 3/6] platform/x86: lenovo-wmi-capdata: Add support for Capability Data 00
Add support for LENOVO_CAPABILITY_DATA_00 WMI data block that comes on
"Other Mode" enabled hardware. Provides an interface for querying if a
given attribute is supported by the hardware, as well as its default
value.
Signed-off-by: Rong Zhang <i@...g.moe>
---
.../wmi/devices/lenovo-wmi-other.rst | 8 +++++++
drivers/platform/x86/lenovo/wmi-capdata.c | 23 ++++++++++++++++++-
drivers/platform/x86/lenovo/wmi-capdata.h | 8 +++++++
3 files changed, 38 insertions(+), 1 deletion(-)
diff --git a/Documentation/wmi/devices/lenovo-wmi-other.rst b/Documentation/wmi/devices/lenovo-wmi-other.rst
index d7928b8dfb4b5..adbd7943c6756 100644
--- a/Documentation/wmi/devices/lenovo-wmi-other.rst
+++ b/Documentation/wmi/devices/lenovo-wmi-other.rst
@@ -31,6 +31,14 @@ under the following path:
/sys/class/firmware-attributes/lenovo-wmi-other/attributes/<attribute>/
+LENOVO_CAPABILITY_DATA_00
+-------------------------
+
+WMI GUID ``362A3AFE-3D96-4665-8530-96DAD5BB300E``
+
+The LENOVO-CAPABILITD_DATA_00 interface provides information on whether the
+device supports querying or setting fan speed.
+
LENOVO_CAPABILITY_DATA_01
-------------------------
diff --git a/drivers/platform/x86/lenovo/wmi-capdata.c b/drivers/platform/x86/lenovo/wmi-capdata.c
index 14175fe19247e..6927de409b09d 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.c
+++ b/drivers/platform/x86/lenovo/wmi-capdata.c
@@ -5,6 +5,9 @@
* Lenovo Capability Data provides information on tunable attributes used by
* the "Other Mode" WMI interface.
*
+ * Capability Data 00 includes if the attribute is supported by the hardware,
+ * and the default_value. All attributes are independent of thermal modes.
+ *
* Capability Data 01 includes if the attribute is supported by the hardware,
* and the default_value, max_value, min_value, and step increment. Each
* attribute has multiple pages, one for each of the thermal modes managed by
@@ -14,7 +17,7 @@
* - Initial implementation (formerly named lenovo-wmi-capdata01)
*
* Copyright (C) 2025 Rong Zhang <i@...g.moe>
- * - Unified implementation
+ * - Unified implementation for Capability Data 00 and 01
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -36,12 +39,14 @@
#include "wmi-capdata.h"
+#define LENOVO_CAPABILITY_DATA_00_GUID "362A3AFE-3D96-4665-8530-96DAD5BB300E"
#define LENOVO_CAPABILITY_DATA_01_GUID "7A8F5407-CB67-4D6E-B547-39B3BE018154"
#define ACPI_AC_CLASS "ac_adapter"
#define ACPI_AC_NOTIFY_STATUS 0x80
enum lwmi_cd_type {
+ LENOVO_CAPABILITY_DATA_00,
LENOVO_CAPABILITY_DATA_01,
};
@@ -57,6 +62,7 @@ static const struct lwmi_cd_info {
const char *name;
enum lwmi_cd_type type;
} lwmi_cd_table[] = {
+ LWMI_CD_TABLE_ITEM(LENOVO_CAPABILITY_DATA_00),
LWMI_CD_TABLE_ITEM(LENOVO_CAPABILITY_DATA_01),
};
@@ -72,6 +78,7 @@ struct cd_list {
u8 count;
union {
+ DECLARE_FLEX_ARRAY(struct capdata00, cd00);
DECLARE_FLEX_ARRAY(struct capdata01, cd01);
};
};
@@ -95,6 +102,9 @@ static int lwmi_cd_component_bind(struct device *cd_dev,
struct lwmi_cd_binder *binder = data;
switch (priv->list->type) {
+ case LENOVO_CAPABILITY_DATA_00:
+ binder->cd00_list = priv->list;
+ break;
case LENOVO_CAPABILITY_DATA_01:
binder->cd01_list = priv->list;
break;
@@ -136,6 +146,9 @@ static const struct component_ops lwmi_cd_component_ops = {
return -EINVAL; \
}
+DEF_LWMI_CDXX_GET_DATA(cd00, LENOVO_CAPABILITY_DATA_00, struct capdata00);
+EXPORT_SYMBOL_NS_GPL(lwmi_cd00_get_data, "LENOVO_WMI_CD");
+
DEF_LWMI_CDXX_GET_DATA(cd01, LENOVO_CAPABILITY_DATA_01, struct capdata01);
EXPORT_SYMBOL_NS_GPL(lwmi_cd01_get_data, "LENOVO_WMI_CD");
@@ -154,6 +167,10 @@ static int lwmi_cd_cache(struct lwmi_cd_priv *priv)
void *p;
switch (priv->list->type) {
+ case LENOVO_CAPABILITY_DATA_00:
+ p = &priv->list->cd00[0];
+ size = sizeof(priv->list->cd00[0]);
+ break;
case LENOVO_CAPABILITY_DATA_01:
p = &priv->list->cd01[0];
size = sizeof(priv->list->cd01[0]);
@@ -199,6 +216,9 @@ static int lwmi_cd_alloc(struct lwmi_cd_priv *priv, enum lwmi_cd_type type)
count = wmidev_instance_count(priv->wdev);
switch (type) {
+ case LENOVO_CAPABILITY_DATA_00:
+ list_size = struct_size(list, cd00, count);
+ break;
case LENOVO_CAPABILITY_DATA_01:
list_size = struct_size(list, cd01, count);
break;
@@ -346,6 +366,7 @@ static void lwmi_cd_remove(struct wmi_device *wdev)
.context = &lwmi_cd_table[_type]
static const struct wmi_device_id lwmi_cd_id_table[] = {
+ { LWMI_CD_WDEV_ID(LENOVO_CAPABILITY_DATA_00) },
{ LWMI_CD_WDEV_ID(LENOVO_CAPABILITY_DATA_01) },
{}
};
diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h
index 1e5fce7836cbf..a6f0cb006e745 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.h
+++ b/drivers/platform/x86/lenovo/wmi-capdata.h
@@ -11,6 +11,12 @@ struct component_match;
struct device;
struct cd_list;
+struct capdata00 {
+ u32 id;
+ u32 supported;
+ u32 default_value;
+};
+
struct capdata01 {
u32 id;
u32 supported;
@@ -21,9 +27,11 @@ struct capdata01 {
};
struct lwmi_cd_binder {
+ struct cd_list *cd00_list;
struct cd_list *cd01_list;
};
+int lwmi_cd00_get_data(struct cd_list *list, u32 attribute_id, struct capdata00 *output);
int lwmi_cd01_get_data(struct cd_list *list, u32 attribute_id, struct capdata01 *output);
void lwmi_cd_match_add_all(struct device *master, struct component_match **matchptr);
--
2.51.0
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