[MIPS] TXx9: cleanup and fix some sparse warnings

[linux-2.6-omap-h63xx.git] / drivers / hwmon / lm75.c

diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index e5c35a355a571b023b04cefe6a6c57671e01875d..de698dc73020ccdf7edf88d8697fa1740c49c67b 100644 (file)
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -31,7 +31,7 @@
 
 
 /* Addresses to scan */
-static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
+static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
                                        0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
 
 /* Insmod parameters */
@@ -248,18 +248,18 @@ static int lm75_detach_client(struct i2c_client *client)
 
 /* All registers are word-sized, except for the configuration register.
    LM75 uses a high-byte first convention, which is exactly opposite to
-   the usual practice. */
+   the SMBus standard. */
 static int lm75_read_value(struct i2c_client *client, u8 reg)
 {
+       int value;
+
        if (reg == LM75_REG_CONF)
                return i2c_smbus_read_byte_data(client, reg);
-       else
-               return swab16(i2c_smbus_read_word_data(client, reg));
+
+       value = i2c_smbus_read_word_data(client, reg);
+       return (value < 0) ? value : swab16(value);
 }
 
-/* All registers are word-sized, except for the configuration register.
-   LM75 uses a high-byte first convention, which is exactly opposite to
-   the usual practice. */
 static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value)
 {
        if (reg == LM75_REG_CONF)
@@ -290,9 +290,16 @@ static struct lm75_data *lm75_update_device(struct device *dev)
                int i;
                dev_dbg(&client->dev, "Starting lm75 update\n");
 
-               for (i = 0; i < ARRAY_SIZE(data->temp); i++)
-                       data->temp[i] = lm75_read_value(client,
-                                                       LM75_REG_TEMP[i]);
+               for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
+                       int status;
+
+                       status = lm75_read_value(client, LM75_REG_TEMP[i]);
+                       if (status < 0)
+                               dev_dbg(&client->dev, "reg %d, err %d\n",
+                                               LM75_REG_TEMP[i], status);
+                       else
+                               data->temp[i] = status;
+               }
                data->last_updated = jiffies;
                data->valid = 1;
        }