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path: root/drivers/gpu/drm/nouveau/nouveau_hwmon.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_hwmon.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_hwmon.c725
1 files changed, 725 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
new file mode 100644
index 000000000..a7db7c310
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -0,0 +1,725 @@
+/*
+ * Copyright 2010 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#ifdef CONFIG_ACPI
+#include <linux/acpi.h>
+#endif
+#include <linux/power_supply.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+
+#include "nouveau_drv.h"
+#include "nouveau_hwmon.h"
+
+#include <nvkm/subdev/iccsense.h>
+#include <nvkm/subdev/volt.h>
+
+#if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
+
+static ssize_t
+nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
+ struct device_attribute *a, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", 100);
+}
+static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, 0444,
+ nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0);
+
+static ssize_t
+nouveau_hwmon_temp1_auto_point1_temp(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_therm *therm = nvxx_therm(&drm->client.device);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000);
+}
+static ssize_t
+nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
+ struct device_attribute *a,
+ const char *buf, size_t count)
+{
+ struct drm_device *dev = dev_get_drvdata(d);
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+ long value;
+
+ if (kstrtol(buf, 10, &value))
+ return -EINVAL;
+
+ therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST,
+ value / 1000);
+
+ return count;
+}
+static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, 0644,
+ nouveau_hwmon_temp1_auto_point1_temp,
+ nouveau_hwmon_set_temp1_auto_point1_temp, 0);
+
+static ssize_t
+nouveau_hwmon_temp1_auto_point1_temp_hyst(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_therm *therm = nvxx_therm(&drm->client.device);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000);
+}
+static ssize_t
+nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
+ struct device_attribute *a,
+ const char *buf, size_t count)
+{
+ struct drm_device *dev = dev_get_drvdata(d);
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+ long value;
+
+ if (kstrtol(buf, 10, &value))
+ return -EINVAL;
+
+ therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST,
+ value / 1000);
+
+ return count;
+}
+static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, 0644,
+ nouveau_hwmon_temp1_auto_point1_temp_hyst,
+ nouveau_hwmon_set_temp1_auto_point1_temp_hyst, 0);
+
+static ssize_t
+nouveau_hwmon_get_pwm1_max(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_therm *therm = nvxx_therm(&drm->client.device);
+ int ret;
+
+ ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t
+nouveau_hwmon_get_pwm1_min(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_therm *therm = nvxx_therm(&drm->client.device);
+ int ret;
+
+ ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t
+nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
+ const char *buf, size_t count)
+{
+ struct drm_device *dev = dev_get_drvdata(d);
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+ long value;
+ int ret;
+
+ if (kstrtol(buf, 10, &value))
+ return -EINVAL;
+
+ ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY, value);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+static SENSOR_DEVICE_ATTR(pwm1_min, 0644,
+ nouveau_hwmon_get_pwm1_min,
+ nouveau_hwmon_set_pwm1_min, 0);
+
+static ssize_t
+nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
+ const char *buf, size_t count)
+{
+ struct drm_device *dev = dev_get_drvdata(d);
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+ long value;
+ int ret;
+
+ if (kstrtol(buf, 10, &value))
+ return -EINVAL;
+
+ ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY, value);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+static SENSOR_DEVICE_ATTR(pwm1_max, 0644,
+ nouveau_hwmon_get_pwm1_max,
+ nouveau_hwmon_set_pwm1_max, 0);
+
+static struct attribute *pwm_fan_sensor_attrs[] = {
+ &sensor_dev_attr_pwm1_min.dev_attr.attr,
+ &sensor_dev_attr_pwm1_max.dev_attr.attr,
+ NULL
+};
+static const struct attribute_group pwm_fan_sensor_group = {
+ .attrs = pwm_fan_sensor_attrs,
+};
+
+static struct attribute *temp1_auto_point_sensor_attrs[] = {
+ &sensor_dev_attr_temp1_auto_point1_pwm.dev_attr.attr,
+ &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
+ &sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr,
+ NULL
+};
+static const struct attribute_group temp1_auto_point_sensor_group = {
+ .attrs = temp1_auto_point_sensor_attrs,
+};
+
+#define N_ATTR_GROUPS 3
+
+static const struct hwmon_channel_info *nouveau_info[] = {
+ HWMON_CHANNEL_INFO(chip,
+ HWMON_C_UPDATE_INTERVAL),
+ HWMON_CHANNEL_INFO(temp,
+ HWMON_T_INPUT |
+ HWMON_T_MAX | HWMON_T_MAX_HYST |
+ HWMON_T_CRIT | HWMON_T_CRIT_HYST |
+ HWMON_T_EMERGENCY | HWMON_T_EMERGENCY_HYST),
+ HWMON_CHANNEL_INFO(fan,
+ HWMON_F_INPUT),
+ HWMON_CHANNEL_INFO(in,
+ HWMON_I_INPUT |
+ HWMON_I_MIN | HWMON_I_MAX |
+ HWMON_I_LABEL),
+ HWMON_CHANNEL_INFO(pwm,
+ HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
+ HWMON_CHANNEL_INFO(power,
+ HWMON_P_INPUT | HWMON_P_CAP_MAX | HWMON_P_CRIT),
+ NULL
+};
+
+static umode_t
+nouveau_chip_is_visible(const void *data, u32 attr, int channel)
+{
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ return 0444;
+ default:
+ return 0;
+ }
+}
+
+static umode_t
+nouveau_power_is_visible(const void *data, u32 attr, int channel)
+{
+ struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
+ struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
+
+ if (!iccsense || !iccsense->data_valid || list_empty(&iccsense->rails))
+ return 0;
+
+ switch (attr) {
+ case hwmon_power_input:
+ return 0444;
+ case hwmon_power_max:
+ if (iccsense->power_w_max)
+ return 0444;
+ return 0;
+ case hwmon_power_crit:
+ if (iccsense->power_w_crit)
+ return 0444;
+ return 0;
+ default:
+ return 0;
+ }
+}
+
+static umode_t
+nouveau_temp_is_visible(const void *data, u32 attr, int channel)
+{
+ struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+
+ if (!therm || !therm->attr_get || nvkm_therm_temp_get(therm) < 0)
+ return 0;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ return 0444;
+ case hwmon_temp_max:
+ case hwmon_temp_max_hyst:
+ case hwmon_temp_crit:
+ case hwmon_temp_crit_hyst:
+ case hwmon_temp_emergency:
+ case hwmon_temp_emergency_hyst:
+ return 0644;
+ default:
+ return 0;
+ }
+}
+
+static umode_t
+nouveau_pwm_is_visible(const void *data, u32 attr, int channel)
+{
+ struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+
+ if (!therm || !therm->attr_get || !therm->fan_get ||
+ therm->fan_get(therm) < 0)
+ return 0;
+
+ switch (attr) {
+ case hwmon_pwm_enable:
+ case hwmon_pwm_input:
+ return 0644;
+ default:
+ return 0;
+ }
+}
+
+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;
+ }
+}
+
+static umode_t
+nouveau_fan_is_visible(const void *data, u32 attr, int channel)
+{
+ struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+
+ if (!therm || !therm->attr_get || nvkm_therm_fan_sense(therm) < 0)
+ return 0;
+
+ switch (attr) {
+ case hwmon_fan_input:
+ return 0444;
+ default:
+ return 0;
+ }
+}
+
+static int
+nouveau_chip_read(struct device *dev, u32 attr, int channel, long *val)
+{
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ *val = 1000;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int
+nouveau_temp_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_therm *therm = nvxx_therm(&drm->client.device);
+ int ret;
+
+ if (!therm || !therm->attr_get)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON)
+ return -EINVAL;
+ ret = nvkm_therm_temp_get(therm);
+ *val = ret < 0 ? ret : (ret * 1000);
+ break;
+ case hwmon_temp_max:
+ *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK)
+ * 1000;
+ break;
+ case hwmon_temp_max_hyst:
+ *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST)
+ * 1000;
+ break;
+ case hwmon_temp_crit:
+ *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL)
+ * 1000;
+ break;
+ case hwmon_temp_crit_hyst:
+ *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST)
+ * 1000;
+ break;
+ case hwmon_temp_emergency:
+ *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN)
+ * 1000;
+ break;
+ case hwmon_temp_emergency_hyst:
+ *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST)
+ * 1000;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int
+nouveau_fan_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_therm *therm = nvxx_therm(&drm->client.device);
+
+ if (!therm)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_fan_input:
+ if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON)
+ return -EINVAL;
+ *val = nvkm_therm_fan_sense(therm);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+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:
+ if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON)
+ return -EINVAL;
+ 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 int
+nouveau_pwm_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_therm *therm = nvxx_therm(&drm->client.device);
+
+ if (!therm || !therm->attr_get || !therm->fan_get)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_pwm_enable:
+ *val = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MODE);
+ break;
+ case hwmon_pwm_input:
+ if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON)
+ return -EINVAL;
+ *val = therm->fan_get(therm);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int
+nouveau_power_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_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
+
+ if (!iccsense)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_power_input:
+ if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON)
+ return -EINVAL;
+ *val = nvkm_iccsense_read_all(iccsense);
+ break;
+ case hwmon_power_max:
+ *val = iccsense->power_w_max;
+ break;
+ case hwmon_power_crit:
+ *val = iccsense->power_w_crit;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int
+nouveau_temp_write(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_therm *therm = nvxx_therm(&drm->client.device);
+
+ if (!therm || !therm->attr_set)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_temp_max:
+ return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK,
+ val / 1000);
+ case hwmon_temp_max_hyst:
+ return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST,
+ val / 1000);
+ case hwmon_temp_crit:
+ return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL,
+ val / 1000);
+ case hwmon_temp_crit_hyst:
+ return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST,
+ val / 1000);
+ case hwmon_temp_emergency:
+ return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN,
+ val / 1000);
+ case hwmon_temp_emergency_hyst:
+ return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST,
+ val / 1000);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int
+nouveau_pwm_write(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_therm *therm = nvxx_therm(&drm->client.device);
+
+ if (!therm || !therm->attr_set)
+ return -EOPNOTSUPP;
+
+ switch (attr) {
+ case hwmon_pwm_input:
+ return therm->fan_set(therm, val);
+ case hwmon_pwm_enable:
+ return therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MODE, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static umode_t
+nouveau_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr,
+ int channel)
+{
+ switch (type) {
+ case hwmon_chip:
+ return nouveau_chip_is_visible(data, attr, channel);
+ case hwmon_temp:
+ return nouveau_temp_is_visible(data, attr, channel);
+ case hwmon_fan:
+ return nouveau_fan_is_visible(data, attr, channel);
+ case hwmon_in:
+ return nouveau_input_is_visible(data, attr, channel);
+ case hwmon_pwm:
+ return nouveau_pwm_is_visible(data, attr, channel);
+ case hwmon_power:
+ return nouveau_power_is_visible(data, attr, channel);
+ default:
+ return 0;
+ }
+}
+
+static const char input_label[] = "GPU core";
+
+static int
+nouveau_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
+ int channel, const char **buf)
+{
+ if (type == hwmon_in && attr == hwmon_in_label) {
+ *buf = input_label;
+ return 0;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static int
+nouveau_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
+ int channel, long *val)
+{
+ switch (type) {
+ case hwmon_chip:
+ return nouveau_chip_read(dev, attr, channel, val);
+ case hwmon_temp:
+ return nouveau_temp_read(dev, attr, channel, val);
+ case hwmon_fan:
+ return nouveau_fan_read(dev, attr, channel, val);
+ case hwmon_in:
+ return nouveau_in_read(dev, attr, channel, val);
+ case hwmon_pwm:
+ return nouveau_pwm_read(dev, attr, channel, val);
+ case hwmon_power:
+ return nouveau_power_read(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int
+nouveau_write(struct device *dev, enum hwmon_sensor_types type, u32 attr,
+ int channel, long val)
+{
+ switch (type) {
+ case hwmon_temp:
+ return nouveau_temp_write(dev, attr, channel, val);
+ case hwmon_pwm:
+ return nouveau_pwm_write(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static const struct hwmon_ops nouveau_hwmon_ops = {
+ .is_visible = nouveau_is_visible,
+ .read = nouveau_read,
+ .read_string = nouveau_read_string,
+ .write = nouveau_write,
+};
+
+static const struct hwmon_chip_info nouveau_chip_info = {
+ .ops = &nouveau_hwmon_ops,
+ .info = nouveau_info,
+};
+#endif
+
+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_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
+ struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
+ struct nvkm_volt *volt = nvxx_volt(&drm->client.device);
+ const struct attribute_group *special_groups[N_ATTR_GROUPS];
+ struct nouveau_hwmon *hwmon;
+ struct device *hwmon_dev;
+ int ret = 0;
+ int i = 0;
+
+ if (!iccsense && !therm && !volt) {
+ NV_DEBUG(drm, "Skipping hwmon registration\n");
+ return 0;
+ }
+
+ hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL);
+ if (!hwmon)
+ return -ENOMEM;
+ hwmon->dev = dev;
+
+ if (therm && therm->attr_get && therm->attr_set) {
+ if (nvkm_therm_temp_get(therm) >= 0)
+ special_groups[i++] = &temp1_auto_point_sensor_group;
+ if (therm->fan_get && therm->fan_get(therm) >= 0)
+ special_groups[i++] = &pwm_fan_sensor_group;
+ }
+
+ special_groups[i] = NULL;
+ hwmon_dev = hwmon_device_register_with_info(dev->dev, "nouveau", dev,
+ &nouveau_chip_info,
+ special_groups);
+ if (IS_ERR(hwmon_dev)) {
+ ret = PTR_ERR(hwmon_dev);
+ NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret);
+ return ret;
+ }
+
+ hwmon->hwmon = hwmon_dev;
+ return 0;
+#else
+ return 0;
+#endif
+}
+
+void
+nouveau_hwmon_fini(struct drm_device *dev)
+{
+#if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
+ struct nouveau_hwmon *hwmon = nouveau_hwmon(dev);
+
+ if (!hwmon)
+ return;
+
+ if (hwmon->hwmon)
+ hwmon_device_unregister(hwmon->hwmon);
+
+ nouveau_drm(dev)->hwmon = NULL;
+ kfree(hwmon);
+#endif
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 19:19:48 +0000