[PATCH v3 4/6] platform/x86: lenovo-wmi-capdata: Add support for Capability Data 00

[Rong Zhang <i@rong.moe>]

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@rong.moe>
Reviewed-by: Derek J. Clark <derekjohn.clark@gmail.com>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
Changes in v2:
- Reword documentation (thanks Derek J. Clark)
---
 .../wmi/devices/lenovo-wmi-other.rst          | 15 ++++++++++---
 drivers/platform/x86/lenovo/wmi-capdata.c     | 21 +++++++++++++++++++
 drivers/platform/x86/lenovo/wmi-capdata.h     |  8 +++++++
 3 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/Documentation/wmi/devices/lenovo-wmi-other.rst b/Documentation/wmi/devices/lenovo-wmi-other.rst
index d7928b8dfb4b..fcad595d49af 100644
--- a/Documentation/wmi/devices/lenovo-wmi-other.rst
+++ b/Documentation/wmi/devices/lenovo-wmi-other.rst
@@ -31,13 +31,22 @@ 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_CAPABILITY_DATA_00 interface provides various information that
+does not rely on the gamezone thermal mode.
+
 LENOVO_CAPABILITY_DATA_01
 -------------------------
 
 WMI GUID ``7A8F5407-CB67-4D6E-B547-39B3BE018154``
 
-The LENOVO_CAPABILITY_DATA_01 interface provides information on various
-power limits of integrated CPU and GPU components.
+The LENOVO_CAPABILITY_DATA_01 interface provides various information that
+relies on the gamezone thermal mode, including power limits of integrated
+CPU and GPU components.
 
 Each attribute has the following properties:
  - current_value
@@ -48,7 +57,7 @@ Each attribute has the following properties:
  - scalar_increment
  - type
 
-The following attributes are implemented:
+The following firmware-attributes are implemented:
  - ppt_pl1_spl: Platform Profile Tracking Sustained Power Limit
  - ppt_pl2_sppt: Platform Profile Tracking Slow Package Power Tracking
  - ppt_pl3_fppt: Platform Profile Tracking Fast Package Power Tracking
diff --git a/drivers/platform/x86/lenovo/wmi-capdata.c b/drivers/platform/x86/lenovo/wmi-capdata.c
index 1f7fc09b7c3f..e8ec30701d88 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
@@ -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 1e5fce7836cb..a6f0cb006e74 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