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Diffstat (limited to 'drivers/hwmon/lm92.c')
-rw-r--r--drivers/hwmon/lm92.c40
1 files changed, 14 insertions, 26 deletions
diff --git a/drivers/hwmon/lm92.c b/drivers/hwmon/lm92.c
index b2e00c5a7eec..7c31e6205f85 100644
--- a/drivers/hwmon/lm92.c
+++ b/drivers/hwmon/lm92.c
@@ -54,9 +54,6 @@
54static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 54static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b,
55 I2C_CLIENT_END }; 55 I2C_CLIENT_END };
56 56
57/* Insmod parameters */
58I2C_CLIENT_INSMOD_1(lm92);
59
60/* The LM92 registers */ 57/* The LM92 registers */
61#define LM92_REG_CONFIG 0x01 /* 8-bit, RW */ 58#define LM92_REG_CONFIG 0x01 /* 8-bit, RW */
62#define LM92_REG_TEMP 0x00 /* 16-bit, RO */ 59#define LM92_REG_TEMP 0x00 /* 16-bit, RO */
@@ -319,35 +316,26 @@ static const struct attribute_group lm92_group = {
319}; 316};
320 317
321/* Return 0 if detection is successful, -ENODEV otherwise */ 318/* Return 0 if detection is successful, -ENODEV otherwise */
322static int lm92_detect(struct i2c_client *new_client, int kind, 319static int lm92_detect(struct i2c_client *new_client,
323 struct i2c_board_info *info) 320 struct i2c_board_info *info)
324{ 321{
325 struct i2c_adapter *adapter = new_client->adapter; 322 struct i2c_adapter *adapter = new_client->adapter;
323 u8 config;
324 u16 man_id;
326 325
327 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA 326 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
328 | I2C_FUNC_SMBUS_WORD_DATA)) 327 | I2C_FUNC_SMBUS_WORD_DATA))
329 return -ENODEV; 328 return -ENODEV;
330 329
331 /* A negative kind means that the driver was loaded with no force 330 config = i2c_smbus_read_byte_data(new_client, LM92_REG_CONFIG);
332 parameter (default), so we must identify the chip. */ 331 man_id = i2c_smbus_read_word_data(new_client, LM92_REG_MAN_ID);
333 if (kind < 0) { 332
334 u8 config = i2c_smbus_read_byte_data(new_client, 333 if ((config & 0xe0) == 0x00 && man_id == 0x0180)
335 LM92_REG_CONFIG); 334 pr_info("lm92: Found National Semiconductor LM92 chip\n");
336 u16 man_id = i2c_smbus_read_word_data(new_client, 335 else if (max6635_check(new_client))
337 LM92_REG_MAN_ID); 336 pr_info("lm92: Found Maxim MAX6635 chip\n");
338 337 else
339 if ((config & 0xe0) == 0x00 338 return -ENODEV;
340 && man_id == 0x0180) {
341 pr_info("lm92: Found National Semiconductor LM92 chip\n");
342 kind = lm92;
343 } else
344 if (max6635_check(new_client)) {
345 pr_info("lm92: Found Maxim MAX6635 chip\n");
346 kind = lm92; /* No separate prefix */
347 }
348 else
349 return -ENODEV;
350 }
351 339
352 strlcpy(info->type, "lm92", I2C_NAME_SIZE); 340 strlcpy(info->type, "lm92", I2C_NAME_SIZE);
353 341
@@ -410,7 +398,7 @@ static int lm92_remove(struct i2c_client *client)
410 */ 398 */
411 399
412static const struct i2c_device_id lm92_id[] = { 400static const struct i2c_device_id lm92_id[] = {
413 { "lm92", lm92 }, 401 { "lm92", 0 },
414 /* max6635 could be added here */ 402 /* max6635 could be added here */
415 { } 403 { }
416}; 404};
@@ -425,7 +413,7 @@ static struct i2c_driver lm92_driver = {
425 .remove = lm92_remove, 413 .remove = lm92_remove,
426 .id_table = lm92_id, 414 .id_table = lm92_id,
427 .detect = lm92_detect, 415 .detect = lm92_detect,
428 .address_data = &addr_data, 416 .address_list = normal_i2c,
429}; 417};
430 418
431static int __init sensors_lm92_init(void) 419static int __init sensors_lm92_init(void)