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Subject[PATCH v2] hwmon: (ina3221) Use _info API to register hwmon device
Date
The hwmon core has a newer API which abstracts most of common
things in the core so as to simplify the hwmon device drivers.

This patch implements this _info API to ina3221 hwmon driver.

It also reduces the binary size:
text data bss dec hex filename
5114 1712 0 6826 1aaa drivers/hwmon/ina3221_before.o
4456 440 0 4896 1320 drivers/hwmon/ina3221.o

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
Changelog
v1->v2:
* Added a binary size comparison in commit message
* Dropped unnecessary checks
* Dropped misleading ID conversion in the comments
* Added two comments to indicate 0-align channel indexes
* Used "fall through" instead of "fallthrough"

drivers/hwmon/ina3221.c | 520 ++++++++++++++++++----------------------
1 file changed, 236 insertions(+), 284 deletions(-)

diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c
index ce8f0a8c4982..973fc4af0ddf 100644
--- a/drivers/hwmon/ina3221.c
+++ b/drivers/hwmon/ina3221.c
@@ -77,21 +77,6 @@ enum ina3221_channels {
INA3221_NUM_CHANNELS
};

-static const unsigned int register_channel[] = {
- [INA3221_BUS1] = INA3221_CHANNEL1,
- [INA3221_BUS2] = INA3221_CHANNEL2,
- [INA3221_BUS3] = INA3221_CHANNEL3,
- [INA3221_SHUNT1] = INA3221_CHANNEL1,
- [INA3221_SHUNT2] = INA3221_CHANNEL2,
- [INA3221_SHUNT3] = INA3221_CHANNEL3,
- [INA3221_CRIT1] = INA3221_CHANNEL1,
- [INA3221_CRIT2] = INA3221_CHANNEL2,
- [INA3221_CRIT3] = INA3221_CHANNEL3,
- [INA3221_WARN1] = INA3221_CHANNEL1,
- [INA3221_WARN2] = INA3221_CHANNEL2,
- [INA3221_WARN3] = INA3221_CHANNEL3,
-};
-
/**
* struct ina3221_input - channel input source specific information
* @label: label of channel input source
@@ -123,58 +108,6 @@ static inline bool ina3221_is_enabled(struct ina3221_data *ina, int channel)
return ina->reg_config & INA3221_CONFIG_CHx_EN(channel);
}

-static ssize_t ina3221_show_label(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
- struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int channel = sd_attr->index;
- struct ina3221_input *input = &ina->inputs[channel];
-
- return snprintf(buf, PAGE_SIZE, "%s\n", input->label);
-}
-
-static ssize_t ina3221_show_enable(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
- struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int channel = sd_attr->index;
-
- return snprintf(buf, PAGE_SIZE, "%d\n",
- ina3221_is_enabled(ina, channel));
-}
-
-static ssize_t ina3221_set_enable(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
- struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int channel = sd_attr->index;
- u16 config, mask = INA3221_CONFIG_CHx_EN(channel);
- bool enable;
- int ret;
-
- ret = kstrtobool(buf, &enable);
- if (ret)
- return ret;
-
- config = enable ? mask : 0;
-
- /* Enable or disable the channel */
- ret = regmap_update_bits(ina->regmap, INA3221_CONFIG, mask, config);
- if (ret)
- return ret;
-
- /* Cache the latest config register value */
- ret = regmap_read(ina->regmap, INA3221_CONFIG, &ina->reg_config);
- if (ret)
- return ret;
-
- return count;
-}
-
static int ina3221_read_value(struct ina3221_data *ina, unsigned int reg,
int *val)
{
@@ -190,94 +123,104 @@ static int ina3221_read_value(struct ina3221_data *ina, unsigned int reg,
return 0;
}

-static ssize_t ina3221_show_bus_voltage(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static const u8 ina3221_in_reg[] = {
+ INA3221_BUS1,
+ INA3221_BUS2,
+ INA3221_BUS3,
+ INA3221_SHUNT1,
+ INA3221_SHUNT2,
+ INA3221_SHUNT3,
+};
+
+static int ina3221_read_in(struct device *dev, u32 attr, int channel, long *val)
{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
+ const bool is_shunt = channel > INA3221_CHANNEL3;
struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int reg = sd_attr->index;
- unsigned int channel = register_channel[reg];
- int val, voltage_mv, ret;
+ u8 reg = ina3221_in_reg[channel];
+ int regval, ret;

- /* No data for read-only attribute if channel is disabled */
- if (!attr->store && !ina3221_is_enabled(ina, channel))
- return -ENODATA;
+ /* Translate shunt channel index to sensor channel index */
+ channel %= INA3221_NUM_CHANNELS;

- ret = ina3221_read_value(ina, reg, &val);
- if (ret)
- return ret;
+ switch (attr) {
+ case hwmon_in_input:
+ if (!ina3221_is_enabled(ina, channel))
+ return -ENODATA;

- voltage_mv = val * 8;
+ ret = ina3221_read_value(ina, reg, &regval);
+ if (ret)
+ return ret;

- return snprintf(buf, PAGE_SIZE, "%d\n", voltage_mv);
+ /*
+ * Scale of shunt voltage (uV): LSB is 40uV
+ * Scale of bus voltage (mV): LSB is 8mV
+ */
+ *val = regval * (is_shunt ? 40 : 8);
+ return 0;
+ case hwmon_in_enable:
+ *val = ina3221_is_enabled(ina, channel);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
}

-static ssize_t ina3221_show_shunt_voltage(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static const u8 ina3221_curr_reg[][INA3221_NUM_CHANNELS] = {
+ [hwmon_curr_input] = { INA3221_SHUNT1, INA3221_SHUNT2, INA3221_SHUNT3 },
+ [hwmon_curr_max] = { INA3221_WARN1, INA3221_WARN2, INA3221_WARN3 },
+ [hwmon_curr_crit] = { INA3221_CRIT1, INA3221_CRIT2, INA3221_CRIT3 },
+ [hwmon_curr_max_alarm] = { F_WF1, F_WF2, F_WF3 },
+ [hwmon_curr_crit_alarm] = { F_CF1, F_CF2, F_CF3 },
+};
+
+static int ina3221_read_curr(struct device *dev, u32 attr,
+ int channel, long *val)
{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int reg = sd_attr->index;
- unsigned int channel = register_channel[reg];
- int val, voltage_uv, ret;
-
- /* No data for read-only attribute if channel is disabled */
- if (!attr->store && !ina3221_is_enabled(ina, channel))
- return -ENODATA;
-
- ret = ina3221_read_value(ina, reg, &val);
- if (ret)
- return ret;
- voltage_uv = val * 40;
-
- return snprintf(buf, PAGE_SIZE, "%d\n", voltage_uv);
-}
-
-static ssize_t ina3221_show_current(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
- struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int reg = sd_attr->index;
- unsigned int channel = register_channel[reg];
struct ina3221_input *input = &ina->inputs[channel];
int resistance_uo = input->shunt_resistor;
- int val, current_ma, voltage_nv, ret;
+ u8 reg = ina3221_curr_reg[attr][channel];
+ int regval, voltage_nv, ret;

- /* No data for read-only attribute if channel is disabled */
- if (!attr->store && !ina3221_is_enabled(ina, channel))
- return -ENODATA;
+ switch (attr) {
+ case hwmon_curr_input:
+ if (!ina3221_is_enabled(ina, channel))
+ return -ENODATA;
+ /* fall through */
+ case hwmon_curr_crit:
+ case hwmon_curr_max:
+ ret = ina3221_read_value(ina, reg, &regval);
+ if (ret)
+ return ret;

- ret = ina3221_read_value(ina, reg, &val);
- if (ret)
- return ret;
- voltage_nv = val * 40000;
-
- current_ma = DIV_ROUND_CLOSEST(voltage_nv, resistance_uo);
-
- return snprintf(buf, PAGE_SIZE, "%d\n", current_ma);
+ /* Scale of shunt voltage: LSB is 40uV (40000nV) */
+ voltage_nv = regval * 40000;
+ /* Return current in mA */
+ *val = DIV_ROUND_CLOSEST(voltage_nv, resistance_uo);
+ return 0;
+ case hwmon_curr_crit_alarm:
+ case hwmon_curr_max_alarm:
+ ret = regmap_field_read(ina->fields[reg], &regval);
+ if (ret)
+ return ret;
+ *val = regval;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
}

-static ssize_t ina3221_set_current(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static int ina3221_write_curr(struct device *dev, u32 attr,
+ int channel, long val)
{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int reg = sd_attr->index;
- unsigned int channel = register_channel[reg];
struct ina3221_input *input = &ina->inputs[channel];
int resistance_uo = input->shunt_resistor;
- int val, current_ma, voltage_uv, ret;
-
- ret = kstrtoint(buf, 0, &current_ma);
- if (ret)
- return ret;
+ u8 reg = ina3221_curr_reg[attr][channel];
+ int regval, current_ma, voltage_uv;

/* clamp current */
- current_ma = clamp_val(current_ma,
+ current_ma = clamp_val(val,
INT_MIN / resistance_uo,
INT_MAX / resistance_uo);

@@ -287,15 +230,168 @@ static ssize_t ina3221_set_current(struct device *dev,
voltage_uv = clamp_val(voltage_uv, -163800, 163800);

/* 1 / 40uV(scale) << 3(register shift) = 5 */
- val = DIV_ROUND_CLOSEST(voltage_uv, 5) & 0xfff8;
+ regval = DIV_ROUND_CLOSEST(voltage_uv, 5) & 0xfff8;

- ret = regmap_write(ina->regmap, reg, val);
+ return regmap_write(ina->regmap, reg, regval);
+}
+
+static int ina3221_write_enable(struct device *dev, int channel, bool enable)
+{
+ struct ina3221_data *ina = dev_get_drvdata(dev);
+ u16 config, mask = INA3221_CONFIG_CHx_EN(channel);
+ int ret;
+
+ config = enable ? mask : 0;
+
+ /* Enable or disable the channel */
+ ret = regmap_update_bits(ina->regmap, INA3221_CONFIG, mask, config);
if (ret)
return ret;

- return count;
+ /* Cache the latest config register value */
+ ret = regmap_read(ina->regmap, INA3221_CONFIG, &ina->reg_config);
+ if (ret)
+ return ret;
+
+ return 0;
}

+static int ina3221_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ switch (type) {
+ case hwmon_in:
+ /* 0-align channel ID */
+ return ina3221_read_in(dev, attr, channel - 1, val);
+ case hwmon_curr:
+ return ina3221_read_curr(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ina3221_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long val)
+{
+ switch (type) {
+ case hwmon_in:
+ /* 0-align channel ID */
+ return ina3221_write_enable(dev, channel - 1, val);
+ case hwmon_curr:
+ return ina3221_write_curr(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ina3221_read_string(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, const char **str)
+{
+ struct ina3221_data *ina = dev_get_drvdata(dev);
+ int index = channel - 1;
+
+ *str = ina->inputs[index].label;
+
+ return 0;
+}
+
+static umode_t ina3221_is_visible(const void *drvdata,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ const struct ina3221_data *ina = drvdata;
+ const struct ina3221_input *input = NULL;
+
+ switch (type) {
+ case hwmon_in:
+ /* Ignore in0_ */
+ if (channel == 0)
+ return 0;
+
+ switch (attr) {
+ case hwmon_in_label:
+ if (channel - 1 <= INA3221_CHANNEL3)
+ input = &ina->inputs[channel - 1];
+ /* Hide label node if label is not provided */
+ return (input && input->label) ? 0444 : 0;
+ case hwmon_in_input:
+ return 0444;
+ case hwmon_in_enable:
+ return 0644;
+ default:
+ return 0;
+ }
+ case hwmon_curr:
+ switch (attr) {
+ case hwmon_curr_input:
+ case hwmon_curr_crit_alarm:
+ case hwmon_curr_max_alarm:
+ return 0444;
+ case hwmon_curr_crit:
+ case hwmon_curr_max:
+ return 0644;
+ default:
+ return 0;
+ }
+ default:
+ return 0;
+ }
+}
+
+static const u32 ina3221_in_config[] = {
+ /* 0: dummy, skipped in is_visible */
+ HWMON_I_INPUT,
+ /* 1-3: input voltage Channels */
+ HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL,
+ HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL,
+ HWMON_I_INPUT | HWMON_I_ENABLE | HWMON_I_LABEL,
+ /* 4-6: shunt voltage Channels */
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ 0
+};
+
+static const struct hwmon_channel_info ina3221_in = {
+ .type = hwmon_in,
+ .config = ina3221_in_config,
+};
+
+#define INA3221_HWMON_CURR_CONFIG (HWMON_C_INPUT | \
+ HWMON_C_CRIT | HWMON_C_CRIT_ALARM | \
+ HWMON_C_MAX | HWMON_C_MAX_ALARM)
+
+static const u32 ina3221_curr_config[] = {
+ INA3221_HWMON_CURR_CONFIG,
+ INA3221_HWMON_CURR_CONFIG,
+ INA3221_HWMON_CURR_CONFIG,
+ 0
+};
+
+static const struct hwmon_channel_info ina3221_curr = {
+ .type = hwmon_curr,
+ .config = ina3221_curr_config,
+};
+
+static const struct hwmon_channel_info *ina3221_info[] = {
+ &ina3221_in,
+ &ina3221_curr,
+ NULL
+};
+
+static const struct hwmon_ops ina3221_hwmon_ops = {
+ .is_visible = ina3221_is_visible,
+ .read_string = ina3221_read_string,
+ .read = ina3221_read,
+ .write = ina3221_write,
+};
+
+static const struct hwmon_chip_info ina3221_chip_info = {
+ .ops = &ina3221_hwmon_ops,
+ .info = ina3221_info,
+};
+
+/* Extra attribute groups */
static ssize_t ina3221_show_shunt(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -329,54 +425,6 @@ static ssize_t ina3221_set_shunt(struct device *dev,
return count;
}

-static ssize_t ina3221_show_alert(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct sensor_device_attribute *sd_attr = to_sensor_dev_attr(attr);
- struct ina3221_data *ina = dev_get_drvdata(dev);
- unsigned int field = sd_attr->index;
- unsigned int regval;
- int ret;
-
- ret = regmap_field_read(ina->fields[field], &regval);
- if (ret)
- return ret;
-
- return snprintf(buf, PAGE_SIZE, "%d\n", regval);
-}
-
-/* input channel label */
-static SENSOR_DEVICE_ATTR(in1_label, 0444,
- ina3221_show_label, NULL, INA3221_CHANNEL1);
-static SENSOR_DEVICE_ATTR(in2_label, 0444,
- ina3221_show_label, NULL, INA3221_CHANNEL2);
-static SENSOR_DEVICE_ATTR(in3_label, 0444,
- ina3221_show_label, NULL, INA3221_CHANNEL3);
-
-/* voltage channel enable */
-static SENSOR_DEVICE_ATTR(in1_enable, 0644,
- ina3221_show_enable, ina3221_set_enable, INA3221_CHANNEL1);
-static SENSOR_DEVICE_ATTR(in2_enable, 0644,
- ina3221_show_enable, ina3221_set_enable, INA3221_CHANNEL2);
-static SENSOR_DEVICE_ATTR(in3_enable, 0644,
- ina3221_show_enable, ina3221_set_enable, INA3221_CHANNEL3);
-
-/* bus voltage */
-static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO,
- ina3221_show_bus_voltage, NULL, INA3221_BUS1);
-static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO,
- ina3221_show_bus_voltage, NULL, INA3221_BUS2);
-static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO,
- ina3221_show_bus_voltage, NULL, INA3221_BUS3);
-
-/* calculated current */
-static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO,
- ina3221_show_current, NULL, INA3221_SHUNT1);
-static SENSOR_DEVICE_ATTR(curr2_input, S_IRUGO,
- ina3221_show_current, NULL, INA3221_SHUNT2);
-static SENSOR_DEVICE_ATTR(curr3_input, S_IRUGO,
- ina3221_show_current, NULL, INA3221_SHUNT3);
-
/* shunt resistance */
static SENSOR_DEVICE_ATTR(shunt1_resistor, S_IRUGO | S_IWUSR,
ina3221_show_shunt, ina3221_set_shunt, INA3221_CHANNEL1);
@@ -385,109 +433,13 @@ static SENSOR_DEVICE_ATTR(shunt2_resistor, S_IRUGO | S_IWUSR,
static SENSOR_DEVICE_ATTR(shunt3_resistor, S_IRUGO | S_IWUSR,
ina3221_show_shunt, ina3221_set_shunt, INA3221_CHANNEL3);

-/* critical current */
-static SENSOR_DEVICE_ATTR(curr1_crit, S_IRUGO | S_IWUSR,
- ina3221_show_current, ina3221_set_current, INA3221_CRIT1);
-static SENSOR_DEVICE_ATTR(curr2_crit, S_IRUGO | S_IWUSR,
- ina3221_show_current, ina3221_set_current, INA3221_CRIT2);
-static SENSOR_DEVICE_ATTR(curr3_crit, S_IRUGO | S_IWUSR,
- ina3221_show_current, ina3221_set_current, INA3221_CRIT3);
-
-/* critical current alert */
-static SENSOR_DEVICE_ATTR(curr1_crit_alarm, S_IRUGO,
- ina3221_show_alert, NULL, F_CF1);
-static SENSOR_DEVICE_ATTR(curr2_crit_alarm, S_IRUGO,
- ina3221_show_alert, NULL, F_CF2);
-static SENSOR_DEVICE_ATTR(curr3_crit_alarm, S_IRUGO,
- ina3221_show_alert, NULL, F_CF3);
-
-/* warning current */
-static SENSOR_DEVICE_ATTR(curr1_max, S_IRUGO | S_IWUSR,
- ina3221_show_current, ina3221_set_current, INA3221_WARN1);
-static SENSOR_DEVICE_ATTR(curr2_max, S_IRUGO | S_IWUSR,
- ina3221_show_current, ina3221_set_current, INA3221_WARN2);
-static SENSOR_DEVICE_ATTR(curr3_max, S_IRUGO | S_IWUSR,
- ina3221_show_current, ina3221_set_current, INA3221_WARN3);
-
-/* warning current alert */
-static SENSOR_DEVICE_ATTR(curr1_max_alarm, S_IRUGO,
- ina3221_show_alert, NULL, F_WF1);
-static SENSOR_DEVICE_ATTR(curr2_max_alarm, S_IRUGO,
- ina3221_show_alert, NULL, F_WF2);
-static SENSOR_DEVICE_ATTR(curr3_max_alarm, S_IRUGO,
- ina3221_show_alert, NULL, F_WF3);
-
-/* shunt voltage */
-static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO,
- ina3221_show_shunt_voltage, NULL, INA3221_SHUNT1);
-static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO,
- ina3221_show_shunt_voltage, NULL, INA3221_SHUNT2);
-static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO,
- ina3221_show_shunt_voltage, NULL, INA3221_SHUNT3);
-
static struct attribute *ina3221_attrs[] = {
- /* channel 1 -- make sure label at first */
- &sensor_dev_attr_in1_label.dev_attr.attr,
- &sensor_dev_attr_in1_enable.dev_attr.attr,
- &sensor_dev_attr_in1_input.dev_attr.attr,
- &sensor_dev_attr_curr1_input.dev_attr.attr,
&sensor_dev_attr_shunt1_resistor.dev_attr.attr,
- &sensor_dev_attr_curr1_crit.dev_attr.attr,
- &sensor_dev_attr_curr1_crit_alarm.dev_attr.attr,
- &sensor_dev_attr_curr1_max.dev_attr.attr,
- &sensor_dev_attr_curr1_max_alarm.dev_attr.attr,
- &sensor_dev_attr_in4_input.dev_attr.attr,
-
- /* channel 2 -- make sure label at first */
- &sensor_dev_attr_in2_label.dev_attr.attr,
- &sensor_dev_attr_in2_enable.dev_attr.attr,
- &sensor_dev_attr_in2_input.dev_attr.attr,
- &sensor_dev_attr_curr2_input.dev_attr.attr,
&sensor_dev_attr_shunt2_resistor.dev_attr.attr,
- &sensor_dev_attr_curr2_crit.dev_attr.attr,
- &sensor_dev_attr_curr2_crit_alarm.dev_attr.attr,
- &sensor_dev_attr_curr2_max.dev_attr.attr,
- &sensor_dev_attr_curr2_max_alarm.dev_attr.attr,
- &sensor_dev_attr_in5_input.dev_attr.attr,
-
- /* channel 3 -- make sure label at first */
- &sensor_dev_attr_in3_label.dev_attr.attr,
- &sensor_dev_attr_in3_enable.dev_attr.attr,
- &sensor_dev_attr_in3_input.dev_attr.attr,
- &sensor_dev_attr_curr3_input.dev_attr.attr,
&sensor_dev_attr_shunt3_resistor.dev_attr.attr,
- &sensor_dev_attr_curr3_crit.dev_attr.attr,
- &sensor_dev_attr_curr3_crit_alarm.dev_attr.attr,
- &sensor_dev_attr_curr3_max.dev_attr.attr,
- &sensor_dev_attr_curr3_max_alarm.dev_attr.attr,
- &sensor_dev_attr_in6_input.dev_attr.attr,
-
NULL,
};
-
-static umode_t ina3221_attr_is_visible(struct kobject *kobj,
- struct attribute *attr, int n)
-{
- const int max_attrs = ARRAY_SIZE(ina3221_attrs) - 1;
- const int num_attrs = max_attrs / INA3221_NUM_CHANNELS;
- struct device *dev = kobj_to_dev(kobj);
- struct ina3221_data *ina = dev_get_drvdata(dev);
- enum ina3221_channels channel = n / num_attrs;
- struct ina3221_input *input = &ina->inputs[channel];
- int index = n % num_attrs;
-
- /* Hide label node if label is not provided */
- if (index == 0 && !input->label)
- return 0;
-
- return attr->mode;
-}
-
-static const struct attribute_group ina3221_group = {
- .is_visible = ina3221_attr_is_visible,
- .attrs = ina3221_attrs,
-};
-__ATTRIBUTE_GROUPS(ina3221);
+ATTRIBUTE_GROUPS(ina3221);

static const struct regmap_range ina3221_yes_ranges[] = {
regmap_reg_range(INA3221_CONFIG, INA3221_BUS3),
@@ -622,9 +574,9 @@ static int ina3221_probe(struct i2c_client *client,

dev_set_drvdata(dev, ina);

- hwmon_dev = devm_hwmon_device_register_with_groups(dev,
- client->name,
- ina, ina3221_groups);
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, ina,
+ &ina3221_chip_info,
+ ina3221_groups);
if (IS_ERR(hwmon_dev)) {
dev_err(dev, "Unable to register hwmon device\n");
return PTR_ERR(hwmon_dev);
--
2.17.1
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