static int
nouveau_in_read(struct device *dev, u32 attr, int channel, long *val)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
struct nouveau_drm *drm = nouveau_drm(drm_dev);
struct nvkm_volt *volt = nvxx_volt(&drm->client.device);
int ret;
if (!volt)
return -EOPNOTSUPP;
switch (attr) {
case hwmon_in_input:
ret = nvkm_volt_get(volt);
*val = ret < 0 ? ret : (ret / 1000);
break;
case hwmon_in_min:
*val = volt->min_uv > 0 ? (volt->min_uv / 1000) : -ENODEV;
break;
case hwmon_in_max:
*val = volt->max_uv > 0 ? (volt->max_uv / 1000) : -ENODEV;
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static ssize_t
nouveau_hwmon_get_in0_input(struct device *d,
struct device_attribute *a, char *buf)
{
struct drm_device *dev = dev_get_drvdata(d);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvkm_volt *volt = nvxx_volt(&drm->device);
int ret;
ret = nvkm_volt_get(volt);
if (ret < 0)
return ret;
return sprintf(buf, "%i\n", ret / 1000);
}
static umode_t
nouveau_input_is_visible(const void *data, u32 attr, int channel)
{
struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
struct nvkm_volt *volt = nvxx_volt(&drm->client.device);
if (!volt || nvkm_volt_get(volt) < 0)
return 0;
switch (attr) {
case hwmon_in_input:
case hwmon_in_label:
case hwmon_in_min:
case hwmon_in_max:
return 0444;
default:
return 0;
}
}
int
nouveau_hwmon_init(struct drm_device *dev)
{
#if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvkm_therm *therm = nvxx_therm(&drm->device);
struct nvkm_volt *volt = nvxx_volt(&drm->device);
struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->device);
struct nouveau_hwmon *hwmon;
struct device *hwmon_dev;
int ret = 0;
hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL);
if (!hwmon)
return -ENOMEM;
hwmon->dev = dev;
hwmon_dev = hwmon_device_register(dev->dev);
if (IS_ERR(hwmon_dev)) {
ret = PTR_ERR(hwmon_dev);
NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret);
return ret;
}
dev_set_drvdata(hwmon_dev, dev);
/* set the default attributes */
ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_default_attrgroup);
if (ret)
goto error;
if (therm && therm->attr_get && therm->attr_set) {
/* if the card has a working thermal sensor */
if (nvkm_therm_temp_get(therm) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_temp_attrgroup);
if (ret)
goto error;
}
/* if the card has a pwm fan */
/*XXX: incorrect, need better detection for this, some boards have
* the gpio entries for pwm fan control even when there's no
* actual fan connected to it... therm table? */
if (therm->fan_get && therm->fan_get(therm) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_pwm_fan_attrgroup);
if (ret)
goto error;
}
}
/* if the card can read the fan rpm */
if (therm && nvkm_therm_fan_sense(therm) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_fan_rpm_attrgroup);
if (ret)
goto error;
}
if (volt && nvkm_volt_get(volt) >= 0) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_in0_attrgroup);
if (ret)
goto error;
}
if (iccsense && iccsense->data_valid && !list_empty(&iccsense->rails)) {
ret = sysfs_create_group(&hwmon_dev->kobj,
&hwmon_power_attrgroup);
if (ret)
goto error;
}
hwmon->hwmon = hwmon_dev;
return 0;
error:
NV_ERROR(drm, "Unable to create some hwmon sysfs files: %d\n", ret);
hwmon_device_unregister(hwmon_dev);
hwmon->hwmon = NULL;
return ret;
#else
return 0;
#endif
}