diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2015-04-05 16:51:36 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-04-19 06:32:37 -0700 |
| commit | a0df926d33232f311d6a4d834391fec21b60db30 (patch) | |
| tree | f394cadb4224f886eb685180fea1901f46402619 | |
| parent | f1bbe618604a4aa833a4af0b1ecdfb47a25455c6 (diff) | |
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>
| -rw-r--r-- | drivers/hwmon/it87.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c index f40d81a0a9fc..5adb269918fb 100644 --- a/drivers/hwmon/it87.c +++ b/drivers/hwmon/it87.c @@ -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 */ |