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authorAndrea Bastoni <bastoni@cs.unc.edu>2010-05-30 19:16:45 -0400
committerAndrea Bastoni <bastoni@cs.unc.edu>2010-05-30 19:16:45 -0400
commitada47b5fe13d89735805b566185f4885f5a3f750 (patch)
tree644b88f8a71896307d71438e9b3af49126ffb22b /drivers/hwmon/lm77.c
parent43e98717ad40a4ae64545b5ba047c7b86aa44f4f (diff)
parent3280f21d43ee541f97f8cda5792150d2dbec20d5 (diff)
Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master
Diffstat (limited to 'drivers/hwmon/lm77.c')
-rw-r--r--drivers/hwmon/lm77.c92
1 files changed, 43 insertions, 49 deletions
diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
index 866b401ab6e8..b28a297be50c 100644
--- a/drivers/hwmon/lm77.c
+++ b/drivers/hwmon/lm77.c
@@ -39,9 +39,6 @@
39static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 39static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b,
40 I2C_CLIENT_END }; 40 I2C_CLIENT_END };
41 41
42/* Insmod parameters */
43I2C_CLIENT_INSMOD_1(lm77);
44
45/* The LM77 registers */ 42/* The LM77 registers */
46#define LM77_REG_TEMP 0x00 43#define LM77_REG_TEMP 0x00
47#define LM77_REG_CONF 0x01 44#define LM77_REG_CONF 0x01
@@ -66,8 +63,7 @@ struct lm77_data {
66 63
67static int lm77_probe(struct i2c_client *client, 64static int lm77_probe(struct i2c_client *client,
68 const struct i2c_device_id *id); 65 const struct i2c_device_id *id);
69static int lm77_detect(struct i2c_client *client, int kind, 66static int lm77_detect(struct i2c_client *client, struct i2c_board_info *info);
70 struct i2c_board_info *info);
71static void lm77_init_client(struct i2c_client *client); 67static void lm77_init_client(struct i2c_client *client);
72static int lm77_remove(struct i2c_client *client); 68static int lm77_remove(struct i2c_client *client);
73static u16 lm77_read_value(struct i2c_client *client, u8 reg); 69static u16 lm77_read_value(struct i2c_client *client, u8 reg);
@@ -77,7 +73,7 @@ static struct lm77_data *lm77_update_device(struct device *dev);
77 73
78 74
79static const struct i2c_device_id lm77_id[] = { 75static const struct i2c_device_id lm77_id[] = {
80 { "lm77", lm77 }, 76 { "lm77", 0 },
81 { } 77 { }
82}; 78};
83MODULE_DEVICE_TABLE(i2c, lm77_id); 79MODULE_DEVICE_TABLE(i2c, lm77_id);
@@ -92,7 +88,7 @@ static struct i2c_driver lm77_driver = {
92 .remove = lm77_remove, 88 .remove = lm77_remove,
93 .id_table = lm77_id, 89 .id_table = lm77_id,
94 .detect = lm77_detect, 90 .detect = lm77_detect,
95 .address_data = &addr_data, 91 .address_list = normal_i2c,
96}; 92};
97 93
98/* straight from the datasheet */ 94/* straight from the datasheet */
@@ -245,10 +241,11 @@ static const struct attribute_group lm77_group = {
245}; 241};
246 242
247/* Return 0 if detection is successful, -ENODEV otherwise */ 243/* Return 0 if detection is successful, -ENODEV otherwise */
248static int lm77_detect(struct i2c_client *new_client, int kind, 244static int lm77_detect(struct i2c_client *new_client,
249 struct i2c_board_info *info) 245 struct i2c_board_info *info)
250{ 246{
251 struct i2c_adapter *adapter = new_client->adapter; 247 struct i2c_adapter *adapter = new_client->adapter;
248 int i, cur, conf, hyst, crit, min, max;
252 249
253 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 250 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
254 I2C_FUNC_SMBUS_WORD_DATA)) 251 I2C_FUNC_SMBUS_WORD_DATA))
@@ -265,51 +262,48 @@ static int lm77_detect(struct i2c_client *new_client, int kind,
265 4. registers cycling over 8-address boundaries 262 4. registers cycling over 8-address boundaries
266 263
267 Word-sized registers are high-byte first. */ 264 Word-sized registers are high-byte first. */
268 if (kind < 0) {
269 int i, cur, conf, hyst, crit, min, max;
270
271 /* addresses cycling */
272 cur = i2c_smbus_read_word_data(new_client, 0);
273 conf = i2c_smbus_read_byte_data(new_client, 1);
274 hyst = i2c_smbus_read_word_data(new_client, 2);
275 crit = i2c_smbus_read_word_data(new_client, 3);
276 min = i2c_smbus_read_word_data(new_client, 4);
277 max = i2c_smbus_read_word_data(new_client, 5);
278 for (i = 8; i <= 0xff; i += 8)
279 if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
280 || i2c_smbus_read_word_data(new_client, i + 2) != hyst
281 || i2c_smbus_read_word_data(new_client, i + 3) != crit
282 || i2c_smbus_read_word_data(new_client, i + 4) != min
283 || i2c_smbus_read_word_data(new_client, i + 5) != max)
284 return -ENODEV;
285
286 /* sign bits */
287 if (((cur & 0x00f0) != 0xf0 && (cur & 0x00f0) != 0x0)
288 || ((hyst & 0x00f0) != 0xf0 && (hyst & 0x00f0) != 0x0)
289 || ((crit & 0x00f0) != 0xf0 && (crit & 0x00f0) != 0x0)
290 || ((min & 0x00f0) != 0xf0 && (min & 0x00f0) != 0x0)
291 || ((max & 0x00f0) != 0xf0 && (max & 0x00f0) != 0x0))
292 return -ENODEV;
293 265
294 /* unused bits */ 266 /* addresses cycling */
295 if (conf & 0xe0) 267 cur = i2c_smbus_read_word_data(new_client, 0);
268 conf = i2c_smbus_read_byte_data(new_client, 1);
269 hyst = i2c_smbus_read_word_data(new_client, 2);
270 crit = i2c_smbus_read_word_data(new_client, 3);
271 min = i2c_smbus_read_word_data(new_client, 4);
272 max = i2c_smbus_read_word_data(new_client, 5);
273 for (i = 8; i <= 0xff; i += 8) {
274 if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
275 || i2c_smbus_read_word_data(new_client, i + 2) != hyst
276 || i2c_smbus_read_word_data(new_client, i + 3) != crit
277 || i2c_smbus_read_word_data(new_client, i + 4) != min
278 || i2c_smbus_read_word_data(new_client, i + 5) != max)
296 return -ENODEV; 279 return -ENODEV;
280 }
297 281
298 /* 0x06 and 0x07 return the last read value */ 282 /* sign bits */
299 cur = i2c_smbus_read_word_data(new_client, 0); 283 if (((cur & 0x00f0) != 0xf0 && (cur & 0x00f0) != 0x0)
300 if (i2c_smbus_read_word_data(new_client, 6) != cur 284 || ((hyst & 0x00f0) != 0xf0 && (hyst & 0x00f0) != 0x0)
301 || i2c_smbus_read_word_data(new_client, 7) != cur) 285 || ((crit & 0x00f0) != 0xf0 && (crit & 0x00f0) != 0x0)
302 return -ENODEV; 286 || ((min & 0x00f0) != 0xf0 && (min & 0x00f0) != 0x0)
303 hyst = i2c_smbus_read_word_data(new_client, 2); 287 || ((max & 0x00f0) != 0xf0 && (max & 0x00f0) != 0x0))
304 if (i2c_smbus_read_word_data(new_client, 6) != hyst 288 return -ENODEV;
305 || i2c_smbus_read_word_data(new_client, 7) != hyst)
306 return -ENODEV;
307 min = i2c_smbus_read_word_data(new_client, 4);
308 if (i2c_smbus_read_word_data(new_client, 6) != min
309 || i2c_smbus_read_word_data(new_client, 7) != min)
310 return -ENODEV;
311 289
312 } 290 /* unused bits */
291 if (conf & 0xe0)
292 return -ENODEV;
293
294 /* 0x06 and 0x07 return the last read value */
295 cur = i2c_smbus_read_word_data(new_client, 0);
296 if (i2c_smbus_read_word_data(new_client, 6) != cur
297 || i2c_smbus_read_word_data(new_client, 7) != cur)
298 return -ENODEV;
299 hyst = i2c_smbus_read_word_data(new_client, 2);
300 if (i2c_smbus_read_word_data(new_client, 6) != hyst
301 || i2c_smbus_read_word_data(new_client, 7) != hyst)
302 return -ENODEV;
303 min = i2c_smbus_read_word_data(new_client, 4);
304 if (i2c_smbus_read_word_data(new_client, 6) != min
305 || i2c_smbus_read_word_data(new_client, 7) != min)
306 return -ENODEV;
313 307
314 strlcpy(info->type, "lm77", I2C_NAME_SIZE); 308 strlcpy(info->type, "lm77", I2C_NAME_SIZE);
315 309