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path: root/drivers/hwmon/lm77.c
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Diffstat (limited to 'drivers/hwmon/lm77.c')
-rw-r--r--drivers/hwmon/lm77.c80
1 files changed, 39 insertions, 41 deletions
diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
index 866b401ab6e8..ac067fd19482 100644
--- a/drivers/hwmon/lm77.c
+++ b/drivers/hwmon/lm77.c
@@ -249,6 +249,7 @@ static int lm77_detect(struct i2c_client *new_client, int kind,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = new_client->adapter;
+ int i, cur, conf, hyst, crit, min, max;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
@@ -265,51 +266,48 @@ static int lm77_detect(struct i2c_client *new_client, int kind,
4. registers cycling over 8-address boundaries
Word-sized registers are high-byte first. */
- if (kind < 0) {
- int i, cur, conf, hyst, crit, min, max;
-
- /* addresses cycling */
- cur = i2c_smbus_read_word_data(new_client, 0);
- conf = i2c_smbus_read_byte_data(new_client, 1);
- hyst = i2c_smbus_read_word_data(new_client, 2);
- crit = i2c_smbus_read_word_data(new_client, 3);
- min = i2c_smbus_read_word_data(new_client, 4);
- max = i2c_smbus_read_word_data(new_client, 5);
- for (i = 8; i <= 0xff; i += 8)
- if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
- || i2c_smbus_read_word_data(new_client, i + 2) != hyst
- || i2c_smbus_read_word_data(new_client, i + 3) != crit
- || i2c_smbus_read_word_data(new_client, i + 4) != min
- || i2c_smbus_read_word_data(new_client, i + 5) != max)
- return -ENODEV;
-
- /* sign bits */
- if (((cur & 0x00f0) != 0xf0 && (cur & 0x00f0) != 0x0)
- || ((hyst & 0x00f0) != 0xf0 && (hyst & 0x00f0) != 0x0)
- || ((crit & 0x00f0) != 0xf0 && (crit & 0x00f0) != 0x0)
- || ((min & 0x00f0) != 0xf0 && (min & 0x00f0) != 0x0)
- || ((max & 0x00f0) != 0xf0 && (max & 0x00f0) != 0x0))
- return -ENODEV;
- /* unused bits */
- if (conf & 0xe0)
+ /* addresses cycling */
+ cur = i2c_smbus_read_word_data(new_client, 0);
+ conf = i2c_smbus_read_byte_data(new_client, 1);
+ hyst = i2c_smbus_read_word_data(new_client, 2);
+ crit = i2c_smbus_read_word_data(new_client, 3);
+ min = i2c_smbus_read_word_data(new_client, 4);
+ max = i2c_smbus_read_word_data(new_client, 5);
+ for (i = 8; i <= 0xff; i += 8) {
+ if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
+ || i2c_smbus_read_word_data(new_client, i + 2) != hyst
+ || i2c_smbus_read_word_data(new_client, i + 3) != crit
+ || i2c_smbus_read_word_data(new_client, i + 4) != min
+ || i2c_smbus_read_word_data(new_client, i + 5) != max)
return -ENODEV;
+ }
- /* 0x06 and 0x07 return the last read value */
- cur = i2c_smbus_read_word_data(new_client, 0);
- if (i2c_smbus_read_word_data(new_client, 6) != cur
- || i2c_smbus_read_word_data(new_client, 7) != cur)
- return -ENODEV;
- hyst = i2c_smbus_read_word_data(new_client, 2);
- if (i2c_smbus_read_word_data(new_client, 6) != hyst
- || i2c_smbus_read_word_data(new_client, 7) != hyst)
- return -ENODEV;
- min = i2c_smbus_read_word_data(new_client, 4);
- if (i2c_smbus_read_word_data(new_client, 6) != min
- || i2c_smbus_read_word_data(new_client, 7) != min)
- return -ENODEV;
+ /* sign bits */
+ if (((cur & 0x00f0) != 0xf0 && (cur & 0x00f0) != 0x0)
+ || ((hyst & 0x00f0) != 0xf0 && (hyst & 0x00f0) != 0x0)
+ || ((crit & 0x00f0) != 0xf0 && (crit & 0x00f0) != 0x0)
+ || ((min & 0x00f0) != 0xf0 && (min & 0x00f0) != 0x0)
+ || ((max & 0x00f0) != 0xf0 && (max & 0x00f0) != 0x0))
+ return -ENODEV;
- }
+ /* unused bits */
+ if (conf & 0xe0)
+ return -ENODEV;
+
+ /* 0x06 and 0x07 return the last read value */
+ cur = i2c_smbus_read_word_data(new_client, 0);
+ if (i2c_smbus_read_word_data(new_client, 6) != cur
+ || i2c_smbus_read_word_data(new_client, 7) != cur)
+ return -ENODEV;
+ hyst = i2c_smbus_read_word_data(new_client, 2);
+ if (i2c_smbus_read_word_data(new_client, 6) != hyst
+ || i2c_smbus_read_word_data(new_client, 7) != hyst)
+ return -ENODEV;
+ min = i2c_smbus_read_word_data(new_client, 4);
+ if (i2c_smbus_read_word_data(new_client, 6) != min
+ || i2c_smbus_read_word_data(new_client, 7) != min)
+ return -ENODEV;
strlcpy(info->type, "lm77", I2C_NAME_SIZE);