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hwmon: (adt7475) set start bit in probe 

The ADT7475 and ADT7476 have the STRT bit cleared by default[1]. Before any
monitoring activities the STRT bit needs to be set. Logically this needs
to happen before any of the sensors are read so the probe() function
seems the best place for it.

[1] - https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
hifive-unleashed-5.1
Chris Packham 2017-04-22 07:08:09 +12:00 committed by Guenter Roeck
parent bdaf9c40b2
commit 4abdf38d20
1 changed files with 13 additions and 0 deletions
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13
drivers/hwmon/adt7475.c
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@ -59,6 +59,8 @@
#define REG_VENDID 0x3E
#define REG_DEVID2 0x3F
#define REG_CONFIG1 0x40
#define REG_STATUS1 0x41
#define REG_STATUS2 0x42
@ -1371,6 +1373,17 @@ static int adt7475_probe(struct i2c_client *client,
for (i = 0; i < ADT7475_PWM_COUNT; i++)
adt7475_read_pwm(client, i);
/* Start monitoring */
switch (chip) {
case adt7475:
case adt7476:
i2c_smbus_write_byte_data(client, REG_CONFIG1,
adt7475_read(REG_CONFIG1) | 0x01);
break;
default:
break;
}
ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group);
if (ret)
return ret;