hwmon: applesmc: fix light sensor readings on newer MacBooks

[linux-2.6-omap-h63xx.git] / drivers / hwmon / applesmc.c

diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index 086c2a5cef0bcdfeae7de4cf4fba665b6745134d..e301862365889e1e2750d1514807a45d6489644b 100644 (file)
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -131,6 +131,10 @@ static const char* temperature_sensors_sets[][36] = {
 /* Set 14: iMac 6,1 */
        { "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TG0P", "TH0P",
          "TO0P", "Tp0P", NULL },
+/* Set 15: MacBook Air 2,1 */
+       { "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TN0D", "TTF0",
+         "TV0P", "TVFP", "TW0P", "Th0P", "Tp0P", "Tp1P", "TpFP", "Ts0P",
+         "Ts0S", NULL },
 };
 
 /* List of keys used to read/write fan speeds */
@@ -586,6 +590,11 @@ static ssize_t applesmc_light_show(struct device *dev,
        }
 
        ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
+       /* newer macbooks report a single 10-bit bigendian value */
+       if (data_length == 10) {
+               left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
+               goto out;
+       }
        left = buffer[2];
        if (ret)
                goto out;
@@ -1301,11 +1310,17 @@ static __initdata struct dmi_match_data applesmc_dmi_data[] = {
        { .accelerometer = 0, .light = 0, .temperature_set = 13 },
 /* iMac 6: light sensor only, temperature set 14 */
        { .accelerometer = 0, .light = 0, .temperature_set = 14 },
+/* MacBook Air 2,1: accelerometer, backlight and temperature set 15 */
+       { .accelerometer = 1, .light = 1, .temperature_set = 15 },
 };
 
 /* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
  * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
 static __initdata struct dmi_system_id applesmc_whitelist[] = {
+       { applesmc_dmi_match, "Apple MacBook Air 2", {
+         DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
+         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir2") },
+               &applesmc_dmi_data[15]},
        { applesmc_dmi_match, "Apple MacBook Air", {
          DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
          DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") },