redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

hwmon: (it87) Enhance validation for fan4 and fan5 

Several of the chips supported by this driver have a configuration
register to enable fan4 and fan5. Use those registers to determine
if fan4 and fan5 tachometers are supported.

Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
hifive-unleashed-5.1
Guenter Roeck 2015-04-05 16:51:36 -07:00
parent f1bbe61860
commit a0df926d33
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/hwmon/it87.c
View File

@ -2415,6 +2415,29 @@ static int __init it87_find(int sioaddr, unsigned short *address,
superio_select(sioaddr, GPIO);
/* Check for fan4, fan5 */
if (has_five_fans(config)) {
reg = superio_inb(sioaddr, IT87_SIO_GPIO2_REG);
switch (sio_data->type) {
case it8718:
if (reg & BIT(5))
sio_data->skip_fan |= BIT(3);
if (reg & BIT(4))
sio_data->skip_fan |= BIT(4);
break;
case it8720:
case it8721:
case it8728:
if (!(reg & BIT(5)))
sio_data->skip_fan |= BIT(3);
if (!(reg & BIT(4)))
sio_data->skip_fan |= BIT(4);
break;
default:
break;
}
}
reg = superio_inb(sioaddr, IT87_SIO_GPIO3_REG);
if (!sio_data->skip_vid) {
/* We need at least 4 VID pins */