diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/hwmon/via-cputemp.c | 44 |
2 files changed, 40 insertions, 5 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 70b5704baf3..0598cd22edf 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1162,6 +1162,7 @@ config SENSORS_TWL4030_MADC config SENSORS_VIA_CPUTEMP tristate "VIA CPU temperature sensor" depends on X86 + select HWMON_VID help If you say yes here you get support for the temperature sensor inside your CPU. Supported are all known variants of diff --git a/drivers/hwmon/via-cputemp.c b/drivers/hwmon/via-cputemp.c index 0d18de424c6..8eac67d769f 100644 --- a/drivers/hwmon/via-cputemp.c +++ b/drivers/hwmon/via-cputemp.c @@ -27,6 +27,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/hwmon.h> +#include <linux/hwmon-vid.h> #include <linux/sysfs.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> @@ -48,8 +49,10 @@ enum { SHOW_TEMP, SHOW_LABEL, SHOW_NAME }; struct via_cputemp_data { struct device *hwmon_dev; const char *name; + u8 vrm; u32 id; - u32 msr; + u32 msr_temp; + u32 msr_vid; }; /* @@ -77,13 +80,27 @@ static ssize_t show_temp(struct device *dev, u32 eax, edx; int err; - err = rdmsr_safe_on_cpu(data->id, data->msr, &eax, &edx); + err = rdmsr_safe_on_cpu(data->id, data->msr_temp, &eax, &edx); if (err) return -EAGAIN; return sprintf(buf, "%lu\n", ((unsigned long)eax & 0xffffff) * 1000); } +static ssize_t show_cpu_vid(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct via_cputemp_data *data = dev_get_drvdata(dev); + u32 eax, edx; + int err; + + err = rdmsr_safe_on_cpu(data->id, data->msr_vid, &eax, &edx); + if (err) + return -EAGAIN; + + return sprintf(buf, "%d\n", vid_from_reg(~edx & 0x7f, data->vrm)); +} + static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, SHOW_TEMP); static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_name, NULL, SHOW_LABEL); @@ -100,6 +117,9 @@ static const struct attribute_group via_cputemp_group = { .attrs = via_cputemp_attributes, }; +/* Optional attributes */ +static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_cpu_vid, NULL); + static int __devinit via_cputemp_probe(struct platform_device *pdev) { struct via_cputemp_data *data; @@ -122,11 +142,12 @@ static int __devinit via_cputemp_probe(struct platform_device *pdev) /* C7 A */ case 0xD: /* C7 D */ - data->msr = 0x1169; + data->msr_temp = 0x1169; + data->msr_vid = 0x198; break; case 0xF: /* Nano */ - data->msr = 0x1423; + data->msr_temp = 0x1423; break; default: err = -ENODEV; @@ -134,7 +155,7 @@ static int __devinit via_cputemp_probe(struct platform_device *pdev) } /* test if we can access the TEMPERATURE MSR */ - err = rdmsr_safe_on_cpu(data->id, data->msr, &eax, &edx); + err = rdmsr_safe_on_cpu(data->id, data->msr_temp, &eax, &edx); if (err) { dev_err(&pdev->dev, "Unable to access TEMPERATURE MSR, giving up\n"); @@ -147,6 +168,15 @@ static int __devinit via_cputemp_probe(struct platform_device *pdev) if (err) goto exit_free; + if (data->msr_vid) + data->vrm = vid_which_vrm(); + + if (data->vrm) { + err = device_create_file(&pdev->dev, &dev_attr_cpu0_vid); + if (err) + goto exit_remove; + } + data->hwmon_dev = hwmon_device_register(&pdev->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); @@ -158,6 +188,8 @@ static int __devinit via_cputemp_probe(struct platform_device *pdev) return 0; exit_remove: + if (data->vrm) + device_remove_file(&pdev->dev, &dev_attr_cpu0_vid); sysfs_remove_group(&pdev->dev.kobj, &via_cputemp_group); exit_free: platform_set_drvdata(pdev, NULL); @@ -171,6 +203,8 @@ static int __devexit via_cputemp_remove(struct platform_device *pdev) struct via_cputemp_data *data = platform_get_drvdata(pdev); hwmon_device_unregister(data->hwmon_dev); + if (data->vrm) + device_remove_file(&pdev->dev, &dev_attr_cpu0_vid); sysfs_remove_group(&pdev->dev.kobj, &via_cputemp_group); platform_set_drvdata(pdev, NULL); kfree(data); |