PLD processing readibility tweaks

Use symbols rather than direct numeric values, as suggested by Samuel.

Change-Id: I82ad7714946d4b46e9b396b3b04edccfe415e954
Signed-off-by: Patrick Porlan <patrick.porlan@intel.com>

diff --git a/enumeration.c b/enumeration.c
index 236e74d..b5464f7 100644 (file)
--- a/enumeration.c
+++ b/enumeration.c
@@ -44,6 +44,10 @@ struct sensor_catalog_entry_t sensor_catalog[] = {
 
 #define CATALOG_SIZE   ARRAY_SIZE(sensor_catalog)
 
+/* ACPI PLD (physical location of device) definitions, as used with sensors */
+
+#define PANEL_FRONT    4
+#define PANEL_BACK     5
 
 /* We equate sensor handles to indices in these tables */
 
@@ -72,7 +76,7 @@ static void setup_properties_from_pld(int s, int panel, int rotation,
        if (num_channels < 3)
                return;
 
-       if (panel == 5) {
+       if (panel == PANEL_BACK) {
                /* Chip placed on the back panel ; negate x and z */
                x = -x;
                z = -z;
@@ -110,7 +114,7 @@ static void setup_properties_from_pld(int s, int panel, int rotation,
 
 static int is_valid_pld (int panel, int rotation)
 {
-       if (panel != 4 && panel != 5) { /* 4 = front ; 5 = back */
+       if (panel != PANEL_FRONT && panel != PANEL_BACK) {
                ALOGW("Unhandled PLD panel spec: %d\n", panel);
                return 0;
        }