[PATCH v8 0/5] replace hwmon_device_register for hwmon_device_register_with_info

[PATCH v8 0/5] replace hwmon_device_register for hwmon_device_register_with_info

[Oscar Salvador]

This v8 fixes removes dummy functions which only had a return and moves the code
into the switch statements.

Versions:

v1 -> v2:
        * Keep temp attrs as read only
v2 -> v3:
        * Code fix-ups: struct and string as const and add return within switch
        due to fallthrough
        * Add Signed-off-by to all commits
v3 -> v4:
        * Rever const to struct attribute. Kbuild complains.
v4 -> v5:
        * Drops a check for attr_set in "nouveau_temp_is_visible".
v5 -> v6:
        * Change to nouveau/hwmon all commit titles
        * Drop author change
        * Coding-Style
        * Move the check before the switch in nouveau_power_is_visible function
        * Expose temperature attrs as RW again
        * Get rid of nouveau_hwmon_set_pwm1/_enable and implement the code inside
        nouveau_pwm_write
        * Get rid of nouveau_hwmon_set_temp_* and implement the code inside
        nouveau_temp_write
v6 -> v7:
        * Got rid of all dummy functions that only had a return, and moved
        code into the switch statements.
v7 -> v8:
	* Fix warnings

This patchseries replaces the deprecated hwmon_device_register function with the
new one hwmon_device_register_with_info.
It also does some cleanup.

Oscar Salvador (5):
  nouveau/hwmon: Add config for all sensors and their settings
  nouveau/hwmon: Add nouveau_hwmon_ops structure with
    .is_visible/.read_string
  nouveau/hwmon: Remove old code, add .write/.read operations
  nouveau/hwmon: expose the auto_point and pwm_min/max attrs
  nouveau/hwmon: Change permissions to numeric

 drivers/gpu/drm/nouveau/nouveau_hwmon.c | 983 +++++++++++++++-----------------
 1 file changed, 464 insertions(+), 519 deletions(-)

-- 
2.1.4

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[PATCH v8 1/5] nouveau/hwmon: Add config for all sensors and their settings

[Oscar Salvador]

This is a preparation for the next patches. It just adds the sensors with
their possible configurable settings and then fills the struct hwmon_channel_info
with all this information.

Signed-off-by: Oscar Salvador <osalvador.vilardaga@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
---
 drivers/gpu/drm/nouveau/nouveau_hwmon.c | 72 +++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index 23b1670..24b40c5 100644
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -692,6 +692,78 @@ static const struct attribute_group hwmon_power_attrgroup = {
 static const struct attribute_group hwmon_power_caps_attrgroup = {
 	.attrs = hwmon_power_caps_attributes,
 };
+
+static const u32 nouveau_config_chip[] = {
+	HWMON_C_UPDATE_INTERVAL,
+	0
+};
+
+static const u32 nouveau_config_in[] = {
+	HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_LABEL,
+	0
+};
+
+static const u32 nouveau_config_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,
+	0
+};
+
+static const u32 nouveau_config_fan[] = {
+	HWMON_F_INPUT,
+	0
+};
+
+static const u32 nouveau_config_pwm[] = {
+	HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
+	0
+};
+
+static const u32 nouveau_config_power[] = {
+	HWMON_P_INPUT | HWMON_P_CAP_MAX | HWMON_P_CRIT,
+	0
+};
+
+static const struct hwmon_channel_info nouveau_chip = {
+	.type = hwmon_chip,
+	.config = nouveau_config_chip,
+};
+
+static const struct hwmon_channel_info nouveau_temp = {
+	.type = hwmon_temp,
+	.config = nouveau_config_temp,
+};
+
+static const struct hwmon_channel_info nouveau_fan = {
+	.type = hwmon_fan,
+	.config = nouveau_config_fan,
+};
+
+static const struct hwmon_channel_info nouveau_in = {
+	.type = hwmon_in,
+	.config = nouveau_config_in,
+};
+
+static const struct hwmon_channel_info nouveau_pwm = {
+	.type = hwmon_pwm,
+	.config = nouveau_config_pwm,
+};
+
+static const struct hwmon_channel_info nouveau_power = {
+	.type = hwmon_power,
+	.config = nouveau_config_power,
+};
+
+static const struct hwmon_channel_info *nouveau_info[] = {
+	&nouveau_chip,
+	&nouveau_temp,
+	&nouveau_fan,
+	&nouveau_in,
+	&nouveau_pwm,
+	&nouveau_power,
+	NULL
+};
 #endif
 
 int
-- 
2.1.4

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[PATCH v8 2/5] nouveau/hwmon: Add nouveau_hwmon_ops structure with .is_visible/.read_string

[Oscar Salvador]

This patch introduces the nouveau_hwmon_ops structure, sets up
.is_visible and .read_string operations and adds all the functions
for these operations.
This is also a preparation for the next patches, where most of the
work is being done.
This code doesn't interacture with the old one.
It's just to make easier the review of all patches.

Signed-off-by: Oscar Salvador <osalvador.vilardaga@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
---
 drivers/gpu/drm/nouveau/nouveau_hwmon.c | 163 ++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index 24b40c5..734fc18 100644
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -764,6 +764,169 @@ static const struct hwmon_channel_info *nouveau_info[] = {
 	&nouveau_power,
 	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:
+	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 0444;
+	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 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, char **buf)
+{
+	if (type == hwmon_in && attr == hwmon_in_label) {
+		*buf = (char *)input_label;
+		return 0;
+	}
+
+	return -EOPNOTSUPP;
+}
+
+static const struct hwmon_ops nouveau_hwmon_ops = {
+	.is_visible = nouveau_is_visible,
+	.read = NULL,
+	.read_string = nouveau_read_string,
+	.write = NULL,
+};
+
+static const struct hwmon_chip_info nouveau_chip_info = {
+	.ops = &nouveau_hwmon_ops,
+	.info = nouveau_info,
+};
 #endif
 
 int
-- 
2.1.4

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Re: [PATCH v8 2/5] nouveau/hwmon: Add nouveau_hwmon_ops structure with .is_visible/.read_string

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 1648 bytes --]

Hi Oscar,

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.12-rc2 next-20170526]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Oscar-Salvador/replace-hwmon_device_register-for-hwmon_device_register_with_info/20170519-053456
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/nouveau/nouveau_hwmon.c:922:17: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     .read_string = nouveau_read_string,
                    ^~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/nouveau/nouveau_hwmon.c:922:17: note: (near initialization for 'nouveau_hwmon_ops.read_string')
   cc1: some warnings being treated as errors

vim +922 drivers/gpu/drm/nouveau/nouveau_hwmon.c

   916		return -EOPNOTSUPP;
   917	}
   918	
   919	static const struct hwmon_ops nouveau_hwmon_ops = {
   920		.is_visible = nouveau_is_visible,
   921		.read = NULL,
 > 922		.read_string = nouveau_read_string,
   923		.write = NULL,
   924	};
   925	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 61645 bytes --]

[-- Attachment #3: Type: text/plain, Size: 154 bytes --]

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[PATCH v8 4/5] nouveau/hwmon: expose the auto_point and pwm_min/max attrs

[Oscar Salvador]

This patch creates a special group attributes for attrs like "*auto_point*".
We check if we have support for them, and if we do, we gather them all in
an attribute_group's structure which is the parameter regarding special groups
of hwmon_device_register_with_info
We also do the same for pwm_min/max attrs.

Signed-off-by: Oscar Salvador <osalvador.vilardaga@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
---
 drivers/gpu/drm/nouveau/nouveau_hwmon.c | 34 ++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index 7d41471..a30cf94 100644
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -192,6 +192,27 @@ static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO | S_IWUSR,
 			  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 u32 nouveau_config_chip[] = {
 	HWMON_C_UPDATE_INTERVAL,
 	0
@@ -687,17 +708,28 @@ 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->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;
 
 	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] = 0;
 	hwmon_dev = hwmon_device_register_with_info(dev->dev, "nouveau", dev,
-							&nouveau_chip_info, NULL);
+							&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);
-- 
2.1.4

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[PATCH v8 3/5] nouveau/hwmon: Remove old code, add .write/.read operations

[Oscar Salvador]

This patch removes old code related to the old api and transforms the
functions for the new api. It also adds the .write and .read operations.

Signed-off-by: Oscar Salvador <osalvador.vilardaga@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
---
 drivers/gpu/drm/nouveau/nouveau_hwmon.c | 844 ++++++++++----------------------
 1 file changed, 261 insertions(+), 583 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index 734fc18..7d41471 100644
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -38,21 +38,6 @@
 #include <nvkm/subdev/volt.h>
 
 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
-static ssize_t
-nouveau_hwmon_show_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);
-	int temp = nvkm_therm_temp_get(therm);
-
-	if (temp < 0)
-		return temp;
-
-	return snprintf(buf, PAGE_SIZE, "%d\n", temp * 1000);
-}
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
-						  NULL, 0);
 
 static ssize_t
 nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
@@ -130,234 +115,7 @@ static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
 			  nouveau_hwmon_set_temp1_auto_point1_temp_hyst, 0);
 
 static ssize_t
-nouveau_hwmon_max_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_DOWN_CLK) * 1000);
-}
-static ssize_t
-nouveau_hwmon_set_max_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) == -EINVAL)
-		return count;
-
-	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK, value / 1000);
-
-	return count;
-}
-static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
-						  nouveau_hwmon_set_max_temp,
-						  0);
-
-static ssize_t
-nouveau_hwmon_max_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_DOWN_CLK_HYST) * 1000);
-}
-static ssize_t
-nouveau_hwmon_set_max_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) == -EINVAL)
-		return count;
-
-	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST,
-			value / 1000);
-
-	return count;
-}
-static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
-			  nouveau_hwmon_max_temp_hyst,
-			  nouveau_hwmon_set_max_temp_hyst, 0);
-
-static ssize_t
-nouveau_hwmon_critical_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_CRITICAL) * 1000);
-}
-static ssize_t
-nouveau_hwmon_set_critical_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) == -EINVAL)
-		return count;
-
-	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL, value / 1000);
-
-	return count;
-}
-static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
-						nouveau_hwmon_critical_temp,
-						nouveau_hwmon_set_critical_temp,
-						0);
-
-static ssize_t
-nouveau_hwmon_critical_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_CRITICAL_HYST) * 1000);
-}
-static ssize_t
-nouveau_hwmon_set_critical_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) == -EINVAL)
-		return count;
-
-	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST,
-			value / 1000);
-
-	return count;
-}
-static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO | S_IWUSR,
-			  nouveau_hwmon_critical_temp_hyst,
-			  nouveau_hwmon_set_critical_temp_hyst, 0);
-static ssize_t
-nouveau_hwmon_emergency_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_SHUTDOWN) * 1000);
-}
-static ssize_t
-nouveau_hwmon_set_emergency_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) == -EINVAL)
-		return count;
-
-	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN, value / 1000);
-
-	return count;
-}
-static SENSOR_DEVICE_ATTR(temp1_emergency, S_IRUGO | S_IWUSR,
-					nouveau_hwmon_emergency_temp,
-					nouveau_hwmon_set_emergency_temp,
-					0);
-
-static ssize_t
-nouveau_hwmon_emergency_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_SHUTDOWN_HYST) * 1000);
-}
-static ssize_t
-nouveau_hwmon_set_emergency_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) == -EINVAL)
-		return count;
-
-	therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST,
-			value / 1000);
-
-	return count;
-}
-static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO | S_IWUSR,
-					nouveau_hwmon_emergency_temp_hyst,
-					nouveau_hwmon_set_emergency_temp_hyst,
-					0);
-
-static ssize_t nouveau_hwmon_show_name(struct device *dev,
-				      struct device_attribute *attr,
-				      char *buf)
-{
-	return sprintf(buf, "nouveau\n");
-}
-static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
-
-static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
-				      struct device_attribute *attr,
-				      char *buf)
-{
-	return sprintf(buf, "1000\n");
-}
-static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
-						nouveau_hwmon_show_update_rate,
-						NULL, 0);
-
-static ssize_t
-nouveau_hwmon_show_fan1_input(struct device *d, struct device_attribute *attr,
-			      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", nvkm_therm_fan_sense(therm));
-}
-static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, nouveau_hwmon_show_fan1_input,
-			  NULL, 0);
-
- static ssize_t
-nouveau_hwmon_get_pwm1_enable(struct device *d,
+nouveau_hwmon_get_pwm1_max(struct device *d,
 			   struct device_attribute *a, char *buf)
 {
 	struct drm_device *dev = dev_get_drvdata(d);
@@ -365,46 +123,7 @@ nouveau_hwmon_get_pwm1_enable(struct device *d,
 	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
 	int ret;
 
-	ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MODE);
-	if (ret < 0)
-		return ret;
-
-	return sprintf(buf, "%i\n", ret);
-}
-
-static ssize_t
-nouveau_hwmon_set_pwm1_enable(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;
-
-	ret = kstrtol(buf, 10, &value);
-	if (ret)
-		return ret;
-
-	ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MODE, value);
-	if (ret)
-		return ret;
-	else
-		return count;
-}
-static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
-			  nouveau_hwmon_get_pwm1_enable,
-			  nouveau_hwmon_set_pwm1_enable, 0);
-
-static ssize_t
-nouveau_hwmon_get_pwm1(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->fan_get(therm);
+	ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY);
 	if (ret < 0)
 		return ret;
 
@@ -412,30 +131,6 @@ nouveau_hwmon_get_pwm1(struct device *d, struct device_attribute *a, char *buf)
 }
 
 static ssize_t
-nouveau_hwmon_set_pwm1(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);
-	int ret = -ENODEV;
-	long value;
-
-	if (kstrtol(buf, 10, &value) == -EINVAL)
-		return -EINVAL;
-
-	ret = therm->fan_set(therm, value);
-	if (ret)
-		return ret;
-
-	return count;
-}
-
-static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR,
-			  nouveau_hwmon_get_pwm1,
-			  nouveau_hwmon_set_pwm1, 0);
-
-static ssize_t
 nouveau_hwmon_get_pwm1_min(struct device *d,
 			   struct device_attribute *a, char *buf)
 {
@@ -470,28 +165,11 @@ nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
 
 	return count;
 }
-
 static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO | S_IWUSR,
 			  nouveau_hwmon_get_pwm1_min,
 			  nouveau_hwmon_set_pwm1_min, 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_set_pwm1_max(struct device *d, struct device_attribute *a,
 			   const char *buf, size_t count)
 {
@@ -510,189 +188,10 @@ nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
 
 	return count;
 }
-
 static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO | S_IWUSR,
 			  nouveau_hwmon_get_pwm1_max,
 			  nouveau_hwmon_set_pwm1_max, 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->client.device);
-	int ret;
-
-	ret = nvkm_volt_get(volt);
-	if (ret < 0)
-		return ret;
-
-	return sprintf(buf, "%i\n", ret / 1000);
-}
-
-static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO,
-			  nouveau_hwmon_get_in0_input, NULL, 0);
-
-static ssize_t
-nouveau_hwmon_get_in0_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_volt *volt = nvxx_volt(&drm->client.device);
-
-	if (!volt || !volt->min_uv)
-		return -ENODEV;
-
-	return sprintf(buf, "%i\n", volt->min_uv / 1000);
-}
-
-static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO,
-			  nouveau_hwmon_get_in0_min, NULL, 0);
-
-static ssize_t
-nouveau_hwmon_get_in0_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_volt *volt = nvxx_volt(&drm->client.device);
-
-	if (!volt || !volt->max_uv)
-		return -ENODEV;
-
-	return sprintf(buf, "%i\n", volt->max_uv / 1000);
-}
-
-static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO,
-			  nouveau_hwmon_get_in0_max, NULL, 0);
-
-static ssize_t
-nouveau_hwmon_get_in0_label(struct device *d,
-			    struct device_attribute *a, char *buf)
-{
-	return sprintf(buf, "GPU core\n");
-}
-
-static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO,
-			  nouveau_hwmon_get_in0_label, NULL, 0);
-
-static ssize_t
-nouveau_hwmon_get_power1_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_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
-	int result = nvkm_iccsense_read_all(iccsense);
-
-	if (result < 0)
-		return result;
-
-	return sprintf(buf, "%i\n", result);
-}
-
-static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO,
-			  nouveau_hwmon_get_power1_input, NULL, 0);
-
-static ssize_t
-nouveau_hwmon_get_power1_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_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
-	return sprintf(buf, "%i\n", iccsense->power_w_max);
-}
-
-static SENSOR_DEVICE_ATTR(power1_max, S_IRUGO,
-			  nouveau_hwmon_get_power1_max, NULL, 0);
-
-static ssize_t
-nouveau_hwmon_get_power1_crit(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_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
-	return sprintf(buf, "%i\n", iccsense->power_w_crit);
-}
-
-static SENSOR_DEVICE_ATTR(power1_crit, S_IRUGO,
-			  nouveau_hwmon_get_power1_crit, NULL, 0);
-
-static struct attribute *hwmon_default_attributes[] = {
-	&sensor_dev_attr_name.dev_attr.attr,
-	&sensor_dev_attr_update_rate.dev_attr.attr,
-	NULL
-};
-static struct attribute *hwmon_temp_attributes[] = {
-	&sensor_dev_attr_temp1_input.dev_attr.attr,
-	&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,
-	&sensor_dev_attr_temp1_max.dev_attr.attr,
-	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
-	&sensor_dev_attr_temp1_emergency.dev_attr.attr,
-	&sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
-	NULL
-};
-static struct attribute *hwmon_fan_rpm_attributes[] = {
-	&sensor_dev_attr_fan1_input.dev_attr.attr,
-	NULL
-};
-static struct attribute *hwmon_pwm_fan_attributes[] = {
-	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
-	&sensor_dev_attr_pwm1.dev_attr.attr,
-	&sensor_dev_attr_pwm1_min.dev_attr.attr,
-	&sensor_dev_attr_pwm1_max.dev_attr.attr,
-	NULL
-};
-
-static struct attribute *hwmon_in0_attributes[] = {
-	&sensor_dev_attr_in0_input.dev_attr.attr,
-	&sensor_dev_attr_in0_min.dev_attr.attr,
-	&sensor_dev_attr_in0_max.dev_attr.attr,
-	&sensor_dev_attr_in0_label.dev_attr.attr,
-	NULL
-};
-
-static struct attribute *hwmon_power_attributes[] = {
-	&sensor_dev_attr_power1_input.dev_attr.attr,
-	NULL
-};
-
-static struct attribute *hwmon_power_caps_attributes[] = {
-	&sensor_dev_attr_power1_max.dev_attr.attr,
-	&sensor_dev_attr_power1_crit.dev_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hwmon_default_attrgroup = {
-	.attrs = hwmon_default_attributes,
-};
-static const struct attribute_group hwmon_temp_attrgroup = {
-	.attrs = hwmon_temp_attributes,
-};
-static const struct attribute_group hwmon_fan_rpm_attrgroup = {
-	.attrs = hwmon_fan_rpm_attributes,
-};
-static const struct attribute_group hwmon_pwm_fan_attrgroup = {
-	.attrs = hwmon_pwm_fan_attributes,
-};
-static const struct attribute_group hwmon_in0_attrgroup = {
-	.attrs = hwmon_in0_attributes,
-};
-static const struct attribute_group hwmon_power_attrgroup = {
-	.attrs = hwmon_power_attributes,
-};
-static const struct attribute_group hwmon_power_caps_attrgroup = {
-	.attrs = hwmon_power_caps_attributes,
-};
-
 static const u32 nouveau_config_chip[] = {
 	HWMON_C_UPDATE_INTERVAL,
 	0
@@ -812,13 +311,14 @@ nouveau_temp_is_visible(const void *data, u32 attr, int channel)
 
 	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 0444;
+		return 0644;
 	default:
 		return 0;
 	}
@@ -880,6 +380,222 @@ nouveau_fan_is_visible(const void *data, u32 attr, int channel)
 	}
 }
 
+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:
+		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:
+		*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:
+		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:
+		*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:
+		*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)
@@ -916,11 +632,47 @@ nouveau_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
 	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 = NULL,
+	.read = nouveau_read,
 	.read_string = nouveau_read_string,
-	.write = NULL,
+	.write = nouveau_write,
 };
 
 static const struct hwmon_chip_info nouveau_chip_info = {
@@ -935,8 +687,6 @@ 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->client.device);
-	struct nvkm_volt *volt = nvxx_volt(&drm->client.device);
-	struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
 	struct nouveau_hwmon *hwmon;
 	struct device *hwmon_dev;
 	int ret = 0;
@@ -946,79 +696,16 @@ nouveau_hwmon_init(struct drm_device *dev)
 		return -ENOMEM;
 	hwmon->dev = dev;
 
-	hwmon_dev = hwmon_device_register(dev->dev);
+	hwmon_dev = hwmon_device_register_with_info(dev->dev, "nouveau", dev,
+							&nouveau_chip_info, NULL);
 	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;
-
-		if (iccsense->power_w_max && iccsense->power_w_crit) {
-			ret = sysfs_create_group(&hwmon_dev->kobj,
-						 &hwmon_power_caps_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
@@ -1030,17 +717,8 @@ 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->hwmon) {
-		sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_default_attrgroup);
-		sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_temp_attrgroup);
-		sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_pwm_fan_attrgroup);
-		sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_fan_rpm_attrgroup);
-		sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_in0_attrgroup);
-		sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_power_attrgroup);
-		sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_power_caps_attrgroup);
-
+	if (hwmon->hwmon)
 		hwmon_device_unregister(hwmon->hwmon);
-	}
 
 	nouveau_drm(dev)->hwmon = NULL;
 	kfree(hwmon);
-- 
2.1.4

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[PATCH v8 5/5] nouveau/hwmon: Change permissions to numeric

[Oscar Salvador]

This patch replaces the symbolic permissions with the numeric ones.

Signed-off-by: Oscar Salvador <osalvador.vilardaga@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
---
 drivers/gpu/drm/nouveau/nouveau_hwmon.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index a30cf94..1150081 100644
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -45,7 +45,7 @@ nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
 {
 	return snprintf(buf, PAGE_SIZE, "%d\n", 100);
 }
-static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, S_IRUGO,
+static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, 0444,
 			  nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0);
 
 static ssize_t
@@ -77,7 +77,7 @@ nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
 
 	return count;
 }
-static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
+static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, 0644,
 			  nouveau_hwmon_temp1_auto_point1_temp,
 			  nouveau_hwmon_set_temp1_auto_point1_temp, 0);
 
@@ -110,7 +110,7 @@ nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
 
 	return count;
 }
-static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
+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);
 
@@ -165,7 +165,7 @@ nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
 
 	return count;
 }
-static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO | S_IWUSR,
+static SENSOR_DEVICE_ATTR(pwm1_min, 0644,
 			  nouveau_hwmon_get_pwm1_min,
 			  nouveau_hwmon_set_pwm1_min, 0);
 
@@ -188,7 +188,7 @@ nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
 
 	return count;
 }
-static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO | S_IWUSR,
+static SENSOR_DEVICE_ATTR(pwm1_max, 0644,
 			  nouveau_hwmon_get_pwm1_max,
 			  nouveau_hwmon_set_pwm1_max, 0);
 
-- 
2.1.4

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Re: [PATCH v8 0/5] replace hwmon_device_register for hwmon_device_register_with_info

[Ben Skeggs]

On 05/19/2017 07:24 AM, Oscar Salvador wrote:
> This v8 fixes removes dummy functions which only had a return and moves the code
> into the switch statements.
Merged.  Thank you!

> 
> Versions:
> 
> v1 -> v2:
>          * Keep temp attrs as read only
> v2 -> v3:
>          * Code fix-ups: struct and string as const and add return within switch
>          due to fallthrough
>          * Add Signed-off-by to all commits
> v3 -> v4:
>          * Rever const to struct attribute. Kbuild complains.
> v4 -> v5:
>          * Drops a check for attr_set in "nouveau_temp_is_visible".
> v5 -> v6:
>          * Change to nouveau/hwmon all commit titles
>          * Drop author change
>          * Coding-Style
>          * Move the check before the switch in nouveau_power_is_visible function
>          * Expose temperature attrs as RW again
>          * Get rid of nouveau_hwmon_set_pwm1/_enable and implement the code inside
>          nouveau_pwm_write
>          * Get rid of nouveau_hwmon_set_temp_* and implement the code inside
>          nouveau_temp_write
> v6 -> v7:
>          * Got rid of all dummy functions that only had a return, and moved
>          code into the switch statements.
> v7 -> v8:
> 	* Fix warnings
> 
> This patchseries replaces the deprecated hwmon_device_register function with the
> new one hwmon_device_register_with_info.
> It also does some cleanup.
> 
> Oscar Salvador (5):
>    nouveau/hwmon: Add config for all sensors and their settings
>    nouveau/hwmon: Add nouveau_hwmon_ops structure with
>      .is_visible/.read_string
>    nouveau/hwmon: Remove old code, add .write/.read operations
>    nouveau/hwmon: expose the auto_point and pwm_min/max attrs
>    nouveau/hwmon: Change permissions to numeric
> 
>   drivers/gpu/drm/nouveau/nouveau_hwmon.c | 983 +++++++++++++++-----------------
>   1 file changed, 464 insertions(+), 519 deletions(-)
> 
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