diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2013-02-26 09:43:50 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2013-04-07 21:16:39 -0700 |
| commit | 0fc1f8fc614ca0fef78011b34ef8da638eb9acea (patch) | |
| tree | 0b2d445ac896a8b21a34c262ce637a7a9410ffee /drivers/hwmon/nct6775.c | |
| parent | 8e9285b0bb2ab48924032147baa29699c0bbee7c (diff) | |
| download | lwn-0fc1f8fc614ca0fef78011b34ef8da638eb9acea.tar.gz lwn-0fc1f8fc614ca0fef78011b34ef8da638eb9acea.zip | |
hwmon: (nct6775) Only report VID if supported and enabled
VID is not always enabled (NCT6775, NCT6776) or supported (NCT6779).
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/nct6775.c')
| -rw-r--r-- | drivers/hwmon/nct6775.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c index 6d5859718113..752fbd7efb32 100644 --- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -3401,6 +3401,8 @@ static int nct6775_probe(struct platform_device *pdev) const u16 *reg_temp, *reg_temp_over, *reg_temp_hyst, *reg_temp_config; const u16 *reg_temp_alternate, *reg_temp_crit; int num_reg_temp; + bool have_vid = false; + u8 cr2a; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (!devm_request_region(&pdev->dev, res->start, IOREGION_LENGTH, @@ -3769,17 +3771,31 @@ static int nct6775_probe(struct platform_device *pdev) /* Initialize the chip */ nct6775_init_device(data); - data->vrm = vid_which_vrm(); err = superio_enter(sio_data->sioreg); if (err) return err; + cr2a = superio_inb(sio_data->sioreg, 0x2a); + switch (data->kind) { + case nct6775: + have_vid = (cr2a & 0x40); + break; + case nct6776: + have_vid = (cr2a & 0x60) == 0x40; + break; + case nct6779: + break; + } + /* * Read VID value * We can get the VID input values directly at logical device D 0xe3. */ - superio_select(sio_data->sioreg, NCT6775_LD_VID); - data->vid = superio_inb(sio_data->sioreg, 0xe3); + if (have_vid) { + superio_select(sio_data->sioreg, NCT6775_LD_VID); + data->vid = superio_inb(sio_data->sioreg, 0xe3); + data->vrm = vid_which_vrm(); + } if (fan_debounce) { u8 tmp; @@ -3804,9 +3820,11 @@ static int nct6775_probe(struct platform_device *pdev) superio_exit(sio_data->sioreg); - err = device_create_file(dev, &dev_attr_cpu0_vid); - if (err) - return err; + if (have_vid) { + err = device_create_file(dev, &dev_attr_cpu0_vid); + if (err) + return err; + } err = nct6775_check_fan_inputs(sio_data, data); if (err) |