[PATCH 0/2] hwmon: (sch5627) Replace hwmon_device_register()

[PATCH 0/2] hwmon: (sch5627) Replace hwmon_device_register()

[W_Armin]

From: Armin Wolf <W_Armin@gmx.de>

When the sch5627 driver is loaded, a warning is displayed during
bootup about hwmon_device_register() being deprecated.

The first patch solves that issue, and the second patch adds
a minor optimization when reading sensor data.

Both patches have been tested on a Fujitsu Esprimo P720
and appear to work without issues.

Armin Wolf (2):
  hwmon: (sch5627) Convert to hwmon_device_register_with_info()
  hwmon: (sch5627) Split sch5627_update_device()

 drivers/hwmon/sch5627.c | 445 ++++++++++++++++------------------------
 1 file changed, 180 insertions(+), 265 deletions(-)

--
2.20.1

[PATCH 1/2] hwmon: (sch5627) Convert to hwmon_device_register_with_info()

[W_Armin]

From: Armin Wolf <W_Armin@gmx.de>

hwmon_device_register() is deprecated.
Convert driver to use hwmon_device_register_with_info() and
remove sysfs attributes which are now being handled by the
hwmon subsystem.

Channel handling was inspired by corsair-cpro.

Tested on a Fujitsu Esprimo P720.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
---
 drivers/hwmon/sch5627.c | 343 +++++++++++++---------------------------
 1 file changed, 111 insertions(+), 232 deletions(-)

diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
index a7e0d7bcf923..023376082ee6 100644
--- a/drivers/hwmon/sch5627.c
+++ b/drivers/hwmon/sch5627.c
@@ -12,7 +12,6 @@
 #include <linux/jiffies.h>
 #include <linux/platform_device.h>
 #include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
 #include <linux/err.h>
 #include <linux/mutex.h>
 #include "sch56xx-common.h"
@@ -192,249 +191,135 @@ static int reg_to_rpm(u16 reg)
 	return 5400540 / reg;
 }

-static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
-	char *buf)
+static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
+				  int channel)
 {
-	return sysfs_emit(buf, "%s\n", DEVNAME);
+	return 0444;
 }

-static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
-			 char *buf)
+static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
+			long *val)
 {
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct sch5627_data *data = sch5627_update_device(dev);
-	int val;
+	int ret;

 	if (IS_ERR(data))
 		return PTR_ERR(data);

-	val = reg_to_temp(data->temp[attr->index]);
-	return sysfs_emit(buf, "%d\n", val);
-}
-
-static ssize_t temp_fault_show(struct device *dev,
-			       struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct sch5627_data *data = sch5627_update_device(dev);
-
-	if (IS_ERR(data))
-		return PTR_ERR(data);
-
-	return sysfs_emit(buf, "%d\n", data->temp[attr->index] == 0);
-}
-
-static ssize_t temp_max_show(struct device *dev,
-			     struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct sch5627_data *data = dev_get_drvdata(dev);
-	int val;
-
-	val = reg_to_temp_limit(data->temp_max[attr->index]);
-	return sysfs_emit(buf, "%d\n", val);
-}
-
-static ssize_t temp_crit_show(struct device *dev,
-			      struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct sch5627_data *data = dev_get_drvdata(dev);
-	int val;
-
-	val = reg_to_temp_limit(data->temp_crit[attr->index]);
-	return sysfs_emit(buf, "%d\n", val);
-}
-
-static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
-			char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct sch5627_data *data = sch5627_update_device(dev);
-	int val;
-
-	if (IS_ERR(data))
-		return PTR_ERR(data);
-
-	val = reg_to_rpm(data->fan[attr->index]);
-	if (val < 0)
-		return val;
-
-	return sysfs_emit(buf, "%d\n", val);
-}
-
-static ssize_t fan_fault_show(struct device *dev,
-			      struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct sch5627_data *data = sch5627_update_device(dev);
-
-	if (IS_ERR(data))
-		return PTR_ERR(data);
-
-	return sysfs_emit(buf, "%d\n",
-			  data->fan[attr->index] == 0xffff);
-}
-
-static ssize_t fan_min_show(struct device *dev,
-			    struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct sch5627_data *data = dev_get_drvdata(dev);
-	int val = reg_to_rpm(data->fan_min[attr->index]);
-	if (val < 0)
-		return val;
-
-	return sysfs_emit(buf, "%d\n", val);
-}
-
-static ssize_t in_show(struct device *dev, struct device_attribute *devattr,
-		       char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct sch5627_data *data = sch5627_update_device(dev);
-	int val;
-
-	if (IS_ERR(data))
-		return PTR_ERR(data);
+	switch (type) {
+	case hwmon_temp:
+		switch (attr) {
+		case hwmon_temp_input:
+			*val = reg_to_temp(data->temp[channel]);
+			return 0;
+		case hwmon_temp_max:
+			*val = reg_to_temp_limit(data->temp_max[channel]);
+			return 0;
+		case hwmon_temp_crit:
+			*val = reg_to_temp_limit(data->temp_crit[channel]);
+			return 0;
+		case hwmon_temp_fault:
+			*val = (data->temp[channel] == 0);
+			return 0;
+		default:
+			break;
+		}
+		break;
+	case hwmon_fan:
+		switch (attr) {
+		case hwmon_fan_input:
+			ret = reg_to_rpm(data->fan[channel]);
+			if (ret < 0)
+				return ret;
+			*val = ret;
+			return 0;
+		case hwmon_fan_min:
+			ret = reg_to_rpm(data->fan_min[channel]);
+			if (ret < 0)
+				return ret;
+			*val = ret;
+			return 0;
+		case hwmon_fan_fault:
+			*val = (data->fan[channel] == 0xffff);
+			return 0;
+		default:
+			break;
+		}
+		break;
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_input:
+			*val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],
+						 10000);
+			return 0;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}

-	val = DIV_ROUND_CLOSEST(
-		data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
-		10000);
-	return sysfs_emit(buf, "%d\n", val);
+	return -EOPNOTSUPP;
 }

-static ssize_t in_label_show(struct device *dev,
-			     struct device_attribute *devattr, char *buf)
+static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
+			       int channel, const char **str)
 {
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+	switch (type) {
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_label:
+			*str = SCH5627_IN_LABELS[channel];
+			return 0;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}

-	return sysfs_emit(buf, "%s\n",
-			  SCH5627_IN_LABELS[attr->index]);
+	return -EOPNOTSUPP;
 }

-static DEVICE_ATTR_RO(name);
-static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
-static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
-static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
-static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
-static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
-static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
-static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
-static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
-static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
-static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
-static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
-static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
-static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
-static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
-static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
-static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
-static SENSOR_DEVICE_ATTR_RO(temp1_max, temp_max, 0);
-static SENSOR_DEVICE_ATTR_RO(temp2_max, temp_max, 1);
-static SENSOR_DEVICE_ATTR_RO(temp3_max, temp_max, 2);
-static SENSOR_DEVICE_ATTR_RO(temp4_max, temp_max, 3);
-static SENSOR_DEVICE_ATTR_RO(temp5_max, temp_max, 4);
-static SENSOR_DEVICE_ATTR_RO(temp6_max, temp_max, 5);
-static SENSOR_DEVICE_ATTR_RO(temp7_max, temp_max, 6);
-static SENSOR_DEVICE_ATTR_RO(temp8_max, temp_max, 7);
-static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);
-static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_crit, 1);
-static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_crit, 2);
-static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp_crit, 3);
-static SENSOR_DEVICE_ATTR_RO(temp5_crit, temp_crit, 4);
-static SENSOR_DEVICE_ATTR_RO(temp6_crit, temp_crit, 5);
-static SENSOR_DEVICE_ATTR_RO(temp7_crit, temp_crit, 6);
-static SENSOR_DEVICE_ATTR_RO(temp8_crit, temp_crit, 7);
-
-static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
-static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
-static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
-static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
-static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan_fault, 0);
-static SENSOR_DEVICE_ATTR_RO(fan2_fault, fan_fault, 1);
-static SENSOR_DEVICE_ATTR_RO(fan3_fault, fan_fault, 2);
-static SENSOR_DEVICE_ATTR_RO(fan4_fault, fan_fault, 3);
-static SENSOR_DEVICE_ATTR_RO(fan1_min, fan_min, 0);
-static SENSOR_DEVICE_ATTR_RO(fan2_min, fan_min, 1);
-static SENSOR_DEVICE_ATTR_RO(fan3_min, fan_min, 2);
-static SENSOR_DEVICE_ATTR_RO(fan4_min, fan_min, 3);
-
-static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
-static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
-static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
-static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
-static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
-static SENSOR_DEVICE_ATTR_RO(in0_label, in_label, 0);
-static SENSOR_DEVICE_ATTR_RO(in1_label, in_label, 1);
-static SENSOR_DEVICE_ATTR_RO(in2_label, in_label, 2);
-static SENSOR_DEVICE_ATTR_RO(in3_label, in_label, 3);
-
-static struct attribute *sch5627_attributes[] = {
-	&dev_attr_name.attr,
-
-	&sensor_dev_attr_temp1_input.dev_attr.attr,
-	&sensor_dev_attr_temp2_input.dev_attr.attr,
-	&sensor_dev_attr_temp3_input.dev_attr.attr,
-	&sensor_dev_attr_temp4_input.dev_attr.attr,
-	&sensor_dev_attr_temp5_input.dev_attr.attr,
-	&sensor_dev_attr_temp6_input.dev_attr.attr,
-	&sensor_dev_attr_temp7_input.dev_attr.attr,
-	&sensor_dev_attr_temp8_input.dev_attr.attr,
-	&sensor_dev_attr_temp1_fault.dev_attr.attr,
-	&sensor_dev_attr_temp2_fault.dev_attr.attr,
-	&sensor_dev_attr_temp3_fault.dev_attr.attr,
-	&sensor_dev_attr_temp4_fault.dev_attr.attr,
-	&sensor_dev_attr_temp5_fault.dev_attr.attr,
-	&sensor_dev_attr_temp6_fault.dev_attr.attr,
-	&sensor_dev_attr_temp7_fault.dev_attr.attr,
-	&sensor_dev_attr_temp8_fault.dev_attr.attr,
-	&sensor_dev_attr_temp1_max.dev_attr.attr,
-	&sensor_dev_attr_temp2_max.dev_attr.attr,
-	&sensor_dev_attr_temp3_max.dev_attr.attr,
-	&sensor_dev_attr_temp4_max.dev_attr.attr,
-	&sensor_dev_attr_temp5_max.dev_attr.attr,
-	&sensor_dev_attr_temp6_max.dev_attr.attr,
-	&sensor_dev_attr_temp7_max.dev_attr.attr,
-	&sensor_dev_attr_temp8_max.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit.dev_attr.attr,
-	&sensor_dev_attr_temp2_crit.dev_attr.attr,
-	&sensor_dev_attr_temp3_crit.dev_attr.attr,
-	&sensor_dev_attr_temp4_crit.dev_attr.attr,
-	&sensor_dev_attr_temp5_crit.dev_attr.attr,
-	&sensor_dev_attr_temp6_crit.dev_attr.attr,
-	&sensor_dev_attr_temp7_crit.dev_attr.attr,
-	&sensor_dev_attr_temp8_crit.dev_attr.attr,
-
-	&sensor_dev_attr_fan1_input.dev_attr.attr,
-	&sensor_dev_attr_fan2_input.dev_attr.attr,
-	&sensor_dev_attr_fan3_input.dev_attr.attr,
-	&sensor_dev_attr_fan4_input.dev_attr.attr,
-	&sensor_dev_attr_fan1_fault.dev_attr.attr,
-	&sensor_dev_attr_fan2_fault.dev_attr.attr,
-	&sensor_dev_attr_fan3_fault.dev_attr.attr,
-	&sensor_dev_attr_fan4_fault.dev_attr.attr,
-	&sensor_dev_attr_fan1_min.dev_attr.attr,
-	&sensor_dev_attr_fan2_min.dev_attr.attr,
-	&sensor_dev_attr_fan3_min.dev_attr.attr,
-	&sensor_dev_attr_fan4_min.dev_attr.attr,
-
-	&sensor_dev_attr_in0_input.dev_attr.attr,
-	&sensor_dev_attr_in1_input.dev_attr.attr,
-	&sensor_dev_attr_in2_input.dev_attr.attr,
-	&sensor_dev_attr_in3_input.dev_attr.attr,
-	&sensor_dev_attr_in4_input.dev_attr.attr,
-	&sensor_dev_attr_in0_label.dev_attr.attr,
-	&sensor_dev_attr_in1_label.dev_attr.attr,
-	&sensor_dev_attr_in2_label.dev_attr.attr,
-	&sensor_dev_attr_in3_label.dev_attr.attr,
-	/* No in4_label as in4 is a generic input pin */
+static const struct hwmon_ops sch5627_ops = {
+	.is_visible = sch5627_is_visible,
+	.read = sch5627_read,
+	.read_string = sch5627_read_string,
+};

+static const struct hwmon_channel_info *sch5627_info[] = {
+	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
+	HWMON_CHANNEL_INFO(temp,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
+			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT
+			   ),
+	HWMON_CHANNEL_INFO(fan,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
+			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT
+			   ),
+	HWMON_CHANNEL_INFO(in,
+			   HWMON_I_INPUT | HWMON_I_LABEL,
+			   HWMON_I_INPUT | HWMON_I_LABEL,
+			   HWMON_I_INPUT | HWMON_I_LABEL,
+			   HWMON_I_INPUT | HWMON_I_LABEL,
+			   HWMON_I_INPUT
+			   ),
 	NULL
 };

-static const struct attribute_group sch5627_group = {
-	.attrs = sch5627_attributes,
+static const struct hwmon_chip_info sch5627_chip_info = {
+	.ops = &sch5627_ops,
+	.info = sch5627_info,
 };

 static int sch5627_remove(struct platform_device *pdev)
@@ -447,8 +332,6 @@ static int sch5627_remove(struct platform_device *pdev)
 	if (data->hwmon_dev)
 		hwmon_device_unregister(data->hwmon_dev);

-	sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
-
 	return 0;
 }

@@ -552,12 +435,8 @@ static int sch5627_probe(struct platform_device *pdev)
 	pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
 		build_code, build_id, hwmon_rev);

-	/* Register sysfs interface files */
-	err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
-	if (err)
-		goto error;
-
-	data->hwmon_dev = hwmon_device_register(&pdev->dev);
+	data->hwmon_dev = hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
+							  &sch5627_chip_info, 0);
 	if (IS_ERR(data->hwmon_dev)) {
 		err = PTR_ERR(data->hwmon_dev);
 		data->hwmon_dev = NULL;
--
2.20.1

[PATCH 2/2] hwmon: (sch5627) Split sch5627_update_device()

[W_Armin]

From: Armin Wolf <W_Armin@gmx.de>

An error in sch5627_update_device() could cause sch5627_read()
to fail even if the error did not affect the target sensor type.
Split sch5627_update_device() to prevent that.

Tested on a Fujitsu Esprimo P720.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
---
 drivers/hwmon/sch5627.c | 102 +++++++++++++++++++++++++++-------------
 1 file changed, 69 insertions(+), 33 deletions(-)

diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
index 023376082ee6..9735f3a81cbb 100644
--- a/drivers/hwmon/sch5627.c
+++ b/drivers/hwmon/sch5627.c
@@ -73,66 +73,96 @@ struct sch5627_data {

 	struct mutex update_lock;
 	unsigned long last_battery;	/* In jiffies */
-	char valid;			/* !=0 if following fields are valid */
-	unsigned long last_updated;	/* In jiffies */
+	char temp_valid;		/* !=0 if following fields are valid */
+	char fan_valid;
+	char in_valid;
+	unsigned long temp_last_updated;	/* In jiffies */
+	unsigned long fan_last_updated;
+	unsigned long in_last_updated;
 	u16 temp[SCH5627_NO_TEMPS];
 	u16 fan[SCH5627_NO_FANS];
 	u16 in[SCH5627_NO_IN];
 };

-static struct sch5627_data *sch5627_update_device(struct device *dev)
+static int sch5627_update_temp(struct sch5627_data *data)
 {
-	struct sch5627_data *data = dev_get_drvdata(dev);
-	struct sch5627_data *ret = data;
+	int ret = 0;
 	int i, val;

 	mutex_lock(&data->update_lock);

-	/* Trigger a Vbat voltage measurement every 5 minutes */
-	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
-		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
-					  data->control | 0x10);
-		data->last_battery = jiffies;
-	}
-
 	/* Cache the values for 1 second */
-	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+	if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) {
 		for (i = 0; i < SCH5627_NO_TEMPS; i++) {
-			val = sch56xx_read_virtual_reg12(data->addr,
-				SCH5627_REG_TEMP_MSB[i],
-				SCH5627_REG_TEMP_LSN[i],
-				SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
+			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
+							 SCH5627_REG_TEMP_LSN[i],
+							 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
 			if (unlikely(val < 0)) {
-				ret = ERR_PTR(val);
+				ret = val;
 				goto abort;
 			}
 			data->temp[i] = val;
 		}
+		data->temp_last_updated = jiffies;
+		data->temp_valid = 1;
+	}
+abort:
+	mutex_unlock(&data->update_lock);
+	return ret;
+}
+
+static int sch5627_update_fan(struct sch5627_data *data)
+{
+	int ret = 0;
+	int i, val;

+	mutex_lock(&data->update_lock);
+
+	/* Cache the values for 1 second */
+	if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) {
 		for (i = 0; i < SCH5627_NO_FANS; i++) {
-			val = sch56xx_read_virtual_reg16(data->addr,
-							 SCH5627_REG_FAN[i]);
+			val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
 			if (unlikely(val < 0)) {
-				ret = ERR_PTR(val);
+				ret = val;
 				goto abort;
 			}
 			data->fan[i] = val;
 		}
+		data->fan_last_updated = jiffies;
+		data->fan_valid = 1;
+	}
+abort:
+	mutex_unlock(&data->update_lock);
+	return ret;
+}
+
+static int sch5627_update_in(struct sch5627_data *data)
+{
+	int ret = 0;
+	int i, val;
+
+	mutex_lock(&data->update_lock);

+	/* Trigger a Vbat voltage measurement every 5 minutes */
+	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
+		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10);
+		data->last_battery = jiffies;
+	}
+
+	/* Cache the values for 1 second */
+	if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) {
 		for (i = 0; i < SCH5627_NO_IN; i++) {
-			val = sch56xx_read_virtual_reg12(data->addr,
-				SCH5627_REG_IN_MSB[i],
-				SCH5627_REG_IN_LSN[i],
-				SCH5627_REG_IN_HIGH_NIBBLE[i]);
+			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
+							 SCH5627_REG_IN_LSN[i],
+							 SCH5627_REG_IN_HIGH_NIBBLE[i]);
 			if (unlikely(val < 0)) {
-				ret = ERR_PTR(val);
+				ret = val;
 				goto abort;
 			}
 			data->in[i] = val;
 		}
-
-		data->last_updated = jiffies;
-		data->valid = 1;
+		data->in_last_updated = jiffies;
+		data->in_valid = 1;
 	}
 abort:
 	mutex_unlock(&data->update_lock);
@@ -200,14 +230,14 @@ static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types t
 static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
 			long *val)
 {
-	struct sch5627_data *data = sch5627_update_device(dev);
+	struct sch5627_data *data = dev_get_drvdata(dev);
 	int ret;

-	if (IS_ERR(data))
-		return PTR_ERR(data);
-
 	switch (type) {
 	case hwmon_temp:
+		ret = sch5627_update_temp(data);
+		if (ret < 0)
+			return ret;
 		switch (attr) {
 		case hwmon_temp_input:
 			*val = reg_to_temp(data->temp[channel]);
@@ -226,6 +256,9 @@ static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 at
 		}
 		break;
 	case hwmon_fan:
+		ret = sch5627_update_fan(data);
+		if (ret < 0)
+			return ret;
 		switch (attr) {
 		case hwmon_fan_input:
 			ret = reg_to_rpm(data->fan[channel]);
@@ -247,6 +280,9 @@ static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 at
 		}
 		break;
 	case hwmon_in:
+		ret = sch5627_update_in(data);
+		if (ret < 0)
+			return ret;
 		switch (attr) {
 		case hwmon_in_input:
 			*val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],
--
2.20.1

Re: [PATCH 0/2] hwmon: (sch5627) Replace hwmon_device_register()

[Hans de Goede]

Hi,

On 4/11/21 6:42 PM, W_Armin@gmx.de wrote:
> From: Armin Wolf <W_Armin@gmx.de>
> 
> When the sch5627 driver is loaded, a warning is displayed during
> bootup about hwmon_device_register() being deprecated.
> 
> The first patch solves that issue, and the second patch adds
> a minor optimization when reading sensor data.
> 
> Both patches have been tested on a Fujitsu Esprimo P720
> and appear to work without issues.

Thank you for doing this, both patches look good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

For both patches.

Regards,

Hans



> Armin Wolf (2):
>   hwmon: (sch5627) Convert to hwmon_device_register_with_info()
>   hwmon: (sch5627) Split sch5627_update_device()
> 
>  drivers/hwmon/sch5627.c | 445 ++++++++++++++++------------------------
>  1 file changed, 180 insertions(+), 265 deletions(-)
> 
> --
> 2.20.1
> 

Re: [PATCH 2/2] hwmon: (sch5627) Split sch5627_update_device()

[Guenter Roeck]

On Sun, Apr 11, 2021 at 06:42:25PM +0200, W_Armin@gmx.de wrote:
> From: Armin Wolf <W_Armin@gmx.de>
> 
> An error in sch5627_update_device() could cause sch5627_read()
> to fail even if the error did not affect the target sensor type.
> Split sch5627_update_device() to prevent that.
> 
> Tested on a Fujitsu Esprimo P720.
> 
> Signed-off-by: Armin Wolf <W_Armin@gmx.de>

Applied.

Thanks,
Guenter

> ---
>  drivers/hwmon/sch5627.c | 102 +++++++++++++++++++++++++++-------------
>  1 file changed, 69 insertions(+), 33 deletions(-)
> 
> --
> 2.20.1
> 
> diff --git a/drivers/hwmon/sch5627.c b/drivers/hwmon/sch5627.c
> index 023376082ee6..9735f3a81cbb 100644
> --- a/drivers/hwmon/sch5627.c
> +++ b/drivers/hwmon/sch5627.c
> @@ -73,66 +73,96 @@ struct sch5627_data {
> 
>  	struct mutex update_lock;
>  	unsigned long last_battery;	/* In jiffies */
> -	char valid;			/* !=0 if following fields are valid */
> -	unsigned long last_updated;	/* In jiffies */
> +	char temp_valid;		/* !=0 if following fields are valid */
> +	char fan_valid;
> +	char in_valid;
> +	unsigned long temp_last_updated;	/* In jiffies */
> +	unsigned long fan_last_updated;
> +	unsigned long in_last_updated;
>  	u16 temp[SCH5627_NO_TEMPS];
>  	u16 fan[SCH5627_NO_FANS];
>  	u16 in[SCH5627_NO_IN];
>  };
> 
> -static struct sch5627_data *sch5627_update_device(struct device *dev)
> +static int sch5627_update_temp(struct sch5627_data *data)
>  {
> -	struct sch5627_data *data = dev_get_drvdata(dev);
> -	struct sch5627_data *ret = data;
> +	int ret = 0;
>  	int i, val;
> 
>  	mutex_lock(&data->update_lock);
> 
> -	/* Trigger a Vbat voltage measurement every 5 minutes */
> -	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
> -		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
> -					  data->control | 0x10);
> -		data->last_battery = jiffies;
> -	}
> -
>  	/* Cache the values for 1 second */
> -	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
> +	if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) {
>  		for (i = 0; i < SCH5627_NO_TEMPS; i++) {
> -			val = sch56xx_read_virtual_reg12(data->addr,
> -				SCH5627_REG_TEMP_MSB[i],
> -				SCH5627_REG_TEMP_LSN[i],
> -				SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
> +			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
> +							 SCH5627_REG_TEMP_LSN[i],
> +							 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
>  			if (unlikely(val < 0)) {
> -				ret = ERR_PTR(val);
> +				ret = val;
>  				goto abort;
>  			}
>  			data->temp[i] = val;
>  		}
> +		data->temp_last_updated = jiffies;
> +		data->temp_valid = 1;
> +	}
> +abort:
> +	mutex_unlock(&data->update_lock);
> +	return ret;
> +}
> +
> +static int sch5627_update_fan(struct sch5627_data *data)
> +{
> +	int ret = 0;
> +	int i, val;
> 
> +	mutex_lock(&data->update_lock);
> +
> +	/* Cache the values for 1 second */
> +	if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) {
>  		for (i = 0; i < SCH5627_NO_FANS; i++) {
> -			val = sch56xx_read_virtual_reg16(data->addr,
> -							 SCH5627_REG_FAN[i]);
> +			val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
>  			if (unlikely(val < 0)) {
> -				ret = ERR_PTR(val);
> +				ret = val;
>  				goto abort;
>  			}
>  			data->fan[i] = val;
>  		}
> +		data->fan_last_updated = jiffies;
> +		data->fan_valid = 1;
> +	}
> +abort:
> +	mutex_unlock(&data->update_lock);
> +	return ret;
> +}
> +
> +static int sch5627_update_in(struct sch5627_data *data)
> +{
> +	int ret = 0;
> +	int i, val;
> +
> +	mutex_lock(&data->update_lock);
> 
> +	/* Trigger a Vbat voltage measurement every 5 minutes */
> +	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
> +		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10);
> +		data->last_battery = jiffies;
> +	}
> +
> +	/* Cache the values for 1 second */
> +	if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) {
>  		for (i = 0; i < SCH5627_NO_IN; i++) {
> -			val = sch56xx_read_virtual_reg12(data->addr,
> -				SCH5627_REG_IN_MSB[i],
> -				SCH5627_REG_IN_LSN[i],
> -				SCH5627_REG_IN_HIGH_NIBBLE[i]);
> +			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
> +							 SCH5627_REG_IN_LSN[i],
> +							 SCH5627_REG_IN_HIGH_NIBBLE[i]);
>  			if (unlikely(val < 0)) {
> -				ret = ERR_PTR(val);
> +				ret = val;
>  				goto abort;
>  			}
>  			data->in[i] = val;
>  		}
> -
> -		data->last_updated = jiffies;
> -		data->valid = 1;
> +		data->in_last_updated = jiffies;
> +		data->in_valid = 1;
>  	}
>  abort:
>  	mutex_unlock(&data->update_lock);
> @@ -200,14 +230,14 @@ static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types t
>  static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
>  			long *val)
>  {
> -	struct sch5627_data *data = sch5627_update_device(dev);
> +	struct sch5627_data *data = dev_get_drvdata(dev);
>  	int ret;
> 
> -	if (IS_ERR(data))
> -		return PTR_ERR(data);
> -
>  	switch (type) {
>  	case hwmon_temp:
> +		ret = sch5627_update_temp(data);
> +		if (ret < 0)
> +			return ret;
>  		switch (attr) {
>  		case hwmon_temp_input:
>  			*val = reg_to_temp(data->temp[channel]);
> @@ -226,6 +256,9 @@ static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 at
>  		}
>  		break;
>  	case hwmon_fan:
> +		ret = sch5627_update_fan(data);
> +		if (ret < 0)
> +			return ret;
>  		switch (attr) {
>  		case hwmon_fan_input:
>  			ret = reg_to_rpm(data->fan[channel]);
> @@ -247,6 +280,9 @@ static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 at
>  		}
>  		break;
>  	case hwmon_in:
> +		ret = sch5627_update_in(data);
> +		if (ret < 0)
> +			return ret;
>  		switch (attr) {
>  		case hwmon_in_input:
>  			*val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],