Documentation/amdgpu: Add FRU attribute details

Add documentation for the newly added manufacturer and fru_id attributes
in sysfs.
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Documentation/gpu/amdgpu/driver-misc.rst

@@ -26,6 +26,18 @@ serial_number
 .. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
    :doc: serial_number
 
+fru_id
+-------------
+
+.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
+   :doc: fru_id
+
+manufacturer
+-------------
+
+.. kernel-doc:: drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
+   :doc: manufacturer
+
 unique_id
 ---------
 

drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c

@@ -321,6 +321,16 @@ static ssize_t amdgpu_fru_serial_number_show(struct device *dev,
 
 static DEVICE_ATTR(serial_number, 0444, amdgpu_fru_serial_number_show, NULL);
 
+/**
+ * DOC: fru_id
+ *
+ * The amdgpu driver provides a sysfs API for reporting FRU File Id
+ * for the device.
+ * The file fru_id is used for this and returns the File Id value
+ * as returned from the FRU.
+ * NOTE: This is only available for certain server cards
+ */
+
 static ssize_t amdgpu_fru_id_show(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
@@ -332,6 +342,15 @@ static ssize_t amdgpu_fru_id_show(struct device *dev,
 
 static DEVICE_ATTR(fru_id, 0444, amdgpu_fru_id_show, NULL);
 
+/**
+ * DOC: manufacturer
+ *
+ * The amdgpu driver provides a sysfs API for reporting manufacturer name from
+ * FRU information.
+ * The file manufacturer returns the value as returned from the FRU.
+ * NOTE: This is only available for certain server cards
+ */
+
 static ssize_t amdgpu_fru_manufacturer_name_show(struct device *dev,
 						 struct device_attribute *attr,
 						 char *buf)