hwmon: (applesmc) Handle new temperature format
The recent Macbooks have temperature registers of a new type.
This patch adds the logic to handle them.
Signed-off-by: Henrik Rydberg <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index 03c24b7..1d7f8af 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -734,13 +734,19 @@
entry = applesmc_get_entry_by_index(index);
if (IS_ERR(entry))
return PTR_ERR(entry);
+ if (entry->len > 2)
+ return -EINVAL;
- ret = applesmc_read_entry(entry, buffer, 2);
+ ret = applesmc_read_entry(entry, buffer, entry->len);
if (ret)
return ret;
- temp = buffer[0]*1000;
- temp += (buffer[1] >> 6) * 250;
+ if (entry->len == 2) {
+ temp = buffer[0] * 1000;
+ temp += (buffer[1] >> 6) * 250;
+ } else {
+ temp = buffer[0] * 4000;
+ }
return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
}
