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authorRudolf Marek <r.marek@assembler.cz>2006-10-08 16:02:09 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-10-18 16:03:08 -0400
commit14992c7eff937bb12c8ebf2d91dbaa8c2f0cfc87 (patch)
treea040439505b90072067540f4d2ae336b437540c4 /drivers/hwmon
parent4660cb354a1dacbbc9c96f94eceedc38fe542fe2 (diff)
w83627ehf: Fix the detection of fan5
Fix the detection of fan5 and preserve the bit between the register writes, because the bit is write only. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/w83627ehf.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 833faa275ffa..2257806d0102 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -354,6 +354,8 @@ static void w83627ehf_write_fan_div(struct i2c_client *client, int nr)
354 case 0: 354 case 0:
355 reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0xcf) 355 reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0xcf)
356 | ((data->fan_div[0] & 0x03) << 4); 356 | ((data->fan_div[0] & 0x03) << 4);
357 /* fan5 input control bit is write only, compute the value */
358 reg |= (data->has_fan & (1 << 4)) ? 1 : 0;
357 w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg); 359 w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
358 reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xdf) 360 reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xdf)
359 | ((data->fan_div[0] & 0x04) << 3); 361 | ((data->fan_div[0] & 0x04) << 3);
@@ -362,6 +364,8 @@ static void w83627ehf_write_fan_div(struct i2c_client *client, int nr)
362 case 1: 364 case 1:
363 reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0x3f) 365 reg = (w83627ehf_read_value(client, W83627EHF_REG_FANDIV1) & 0x3f)
364 | ((data->fan_div[1] & 0x03) << 6); 366 | ((data->fan_div[1] & 0x03) << 6);
367 /* fan5 input control bit is write only, compute the value */
368 reg |= (data->has_fan & (1 << 4)) ? 1 : 0;
365 w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg); 369 w83627ehf_write_value(client, W83627EHF_REG_FANDIV1, reg);
366 reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xbf) 370 reg = (w83627ehf_read_value(client, W83627EHF_REG_VBAT) & 0xbf)
367 | ((data->fan_div[1] & 0x04) << 4); 371 | ((data->fan_div[1] & 0x04) << 4);
@@ -1216,13 +1220,16 @@ static int w83627ehf_detect(struct i2c_adapter *adapter)
1216 superio_exit(); 1220 superio_exit();
1217 1221
1218 /* It looks like fan4 and fan5 pins can be alternatively used 1222 /* It looks like fan4 and fan5 pins can be alternatively used
1219 as fan on/off switches */ 1223 as fan on/off switches, but fan5 control is write only :/
1224 We assume that if the serial interface is disabled, designers
1225 connected fan5 as input unless they are emitting log 1, which
1226 is not the default. */
1220 1227
1221 data->has_fan = 0x07; /* fan1, fan2 and fan3 */ 1228 data->has_fan = 0x07; /* fan1, fan2 and fan3 */
1222 i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1); 1229 i = w83627ehf_read_value(client, W83627EHF_REG_FANDIV1);
1223 if ((i & (1 << 2)) && (!fan4pin)) 1230 if ((i & (1 << 2)) && (!fan4pin))
1224 data->has_fan |= (1 << 3); 1231 data->has_fan |= (1 << 3);
1225 if ((i & (1 << 0)) && (!fan5pin)) 1232 if (!(i & (1 << 1)) && (!fan5pin))
1226 data->has_fan |= (1 << 4); 1233 data->has_fan |= (1 << 4);
1227 1234
1228 /* Register sysfs hooks */ 1235 /* Register sysfs hooks */