ACPI / property: Define a symbol for PRP0001

Use a #defined symbol ACPI_DT_NAMESPACE_HID instead of the PRP0001
string.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>

3 files changed, 21 insertions, 17 deletions

diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index ba4a61e964be..d93628c65661 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -191,6 +191,8 @@ bool acpi_osi_is_win8(void);
 /*--------------------------------------------------------------------------
                                 Device properties
   -------------------------------------------------------------------------- */
+#define ACPI_DT_NAMESPACE_HID   "PRP0001"
+
 void acpi_init_properties(struct acpi_device *adev);
 void acpi_free_properties(struct acpi_device *adev);
 
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 76075eea5f64..7836e2e980f4 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -110,11 +110,11 @@ void acpi_init_properties(struct acpi_device *adev)
         int i;
 
         /*
-         * Check if the special PRP0001 ACPI ID is present and in that case we
-         * fill in Device Tree compatible properties for this device.
+         * Check if ACPI_DT_NAMESPACE_HID is present and inthat case we fill in
+         * Device Tree compatible properties for this device.
          */
         list_for_each_entry(hwid, &adev->pnp.ids, list) {
-                if (!strcmp(hwid->id, "PRP0001")) {
+                if (!strcmp(hwid->id, ACPI_DT_NAMESPACE_HID)) {
                         acpi_of = true;
                         break;
                 }
@@ -170,7 +170,7 @@ void acpi_init_properties(struct acpi_device *adev)
  out:
         if (acpi_of && !adev->flags.of_compatible_ok)
                 acpi_handle_info(adev->handle,
-                                 "PRP0001 requires 'compatible' property\n");
+                         ACPI_DT_NAMESPACE_HID " requires 'compatible' property\n");
 }
 
 void acpi_free_properties(struct acpi_device *adev)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 03141aa4ea95..b19283b336c7 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -135,12 +135,13 @@ static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
         struct acpi_hardware_id *id;
 
         /*
-         * Since we skip PRP0001 from the modalias below, 0 should be returned
-         * if PRP0001 is the only ACPI/PNP ID in the device's list.
+         * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
+         * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
+         * device's list.
          */
         count = 0;
         list_for_each_entry(id, &acpi_dev->pnp.ids, list)
-                if (strcmp(id->id, "PRP0001"))
+                if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
                         count++;
 
         if (!count)
@@ -153,7 +154,7 @@ static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
         size -= len;
 
         list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
-                if (!strcmp(id->id, "PRP0001"))
+                if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
                         continue;
 
                 count = snprintf(&modalias[len], size, "%s:", id->id);
@@ -177,7 +178,8 @@ static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
  * @size: Size of the buffer.
  *
  * Expose DT compatible modalias as of:NnameTCcompatible.  This function should
- * only be called for devices having PRP0001 in their list of ACPI/PNP IDs.
+ * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
+ * ACPI/PNP IDs.
  */
 static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
                               int size)
@@ -980,9 +982,9 @@ static void acpi_device_remove_files(struct acpi_device *dev)
  * @adev: ACPI device object to match.
  * @of_match_table: List of device IDs to match against.
  *
- * If @dev has an ACPI companion which has the special PRP0001 device ID in its
- * list of identifiers and a _DSD object with the "compatible" property, use
- * that property to match against the given list of identifiers.
+ * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
+ * identifiers and a _DSD object with the "compatible" property, use that
+ * property to match against the given list of identifiers.
  */
 static bool acpi_of_match_device(struct acpi_device *adev,
                                  const struct of_device_id *of_match_table)
@@ -1038,14 +1040,14 @@ static const struct acpi_device_id *__acpi_match_device(
                                 return id;
 
                 /*
-                 * Next, check the special "PRP0001" ID and try to match the
+                 * Next, check ACPI_DT_NAMESPACE_HID and try to match the
                  * "compatible" property if found.
                  *
                  * The id returned by the below is not valid, but the only
                  * caller passing non-NULL of_ids here is only interested in
                  * whether or not the return value is NULL.
                  */
-                if (!strcmp("PRP0001", hwid->id)
+                if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)
                     && acpi_of_match_device(device, of_ids))
                         return id;
         }
@@ -2405,7 +2407,7 @@ static void acpi_default_enumeration(struct acpi_device *device)
 }
 
 static const struct acpi_device_id generic_device_ids[] = {
-        {"PRP0001", },
+        {ACPI_DT_NAMESPACE_HID, },
         {"", },
 };
 
@@ -2413,8 +2415,8 @@ static int acpi_generic_device_attach(struct acpi_device *adev,
                                       const struct acpi_device_id *not_used)
 {
         /*
-         * Since PRP0001 is the only ID handled here, the test below can be
-         * unconditional.
+         * Since ACPI_DT_NAMESPACE_HID is the only ID handled here, the test
+         * below can be unconditional.
          */
         if (adev->data.of_compatible)
                 acpi_default_enumeration(adev);