1 // SPDX-License-Identifier: GPL-2.0-only
16 #include <linux/hwmon-sysfs.h>
21  * struct iio_hwmon_state - device instance state
42 	struct iio_channel *chan = &state->channels[sattr->index];  in iio_hwmon_read_label()
60 	struct iio_channel *chan = &state->channels[sattr->index];  in iio_hwmon_read_val()
68 		/* mili-Watts to micro-Watts conversion */  in iio_hwmon_read_val()
80 	struct device *dev = &pdev->dev;  in iio_hwmon_probe()
94 		if (ret == -ENODEV)  in iio_hwmon_probe()
95 			ret = -EPROBE_DEFER;  in iio_hwmon_probe()
103 		return -ENOMEM;  in iio_hwmon_probe()
105 	st->channels = channels;  in iio_hwmon_probe()
108 	while (st->channels[st->num_channels].indio_dev)  in iio_hwmon_probe()
109 		st->num_channels++;  in iio_hwmon_probe()
111 	st->attrs = devm_kcalloc(dev,  in iio_hwmon_probe()
112 				 2 * st->num_channels + 1, sizeof(*st->attrs),  in iio_hwmon_probe()
114 	if (st->attrs == NULL)  in iio_hwmon_probe()
115 		return -ENOMEM;  in iio_hwmon_probe()
117 	for (i = 0; i < st->num_channels; i++) {  in iio_hwmon_probe()
123 			return -ENOMEM;  in iio_hwmon_probe()
125 		sysfs_attr_init(&a->dev_attr.attr);  in iio_hwmon_probe()
126 		ret = iio_get_channel_type(&st->channels[i], &type);  in iio_hwmon_probe()
152 			return -EINVAL;  in iio_hwmon_probe()
155 		a->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,  in iio_hwmon_probe()
158 		if (a->dev_attr.attr.name == NULL)  in iio_hwmon_probe()
159 			return -ENOMEM;  in iio_hwmon_probe()
161 		a->dev_attr.show = iio_hwmon_read_val;  in iio_hwmon_probe()
162 		a->dev_attr.attr.mode = 0444;  in iio_hwmon_probe()
163 		a->index = i;  in iio_hwmon_probe()
164 		st->attrs[attr++] = &a->dev_attr.attr;  in iio_hwmon_probe()
167 		if (iio_read_channel_label(&st->channels[i], buf) < 0)  in iio_hwmon_probe()
172 			return -ENOMEM;  in iio_hwmon_probe()
174 		sysfs_attr_init(&a->dev_attr.attr);  in iio_hwmon_probe()
175 		a->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,  in iio_hwmon_probe()
178 		if (!a->dev_attr.attr.name)  in iio_hwmon_probe()
179 			return -ENOMEM;  in iio_hwmon_probe()
181 		a->dev_attr.show = iio_hwmon_read_label;  in iio_hwmon_probe()
182 		a->dev_attr.attr.mode = 0444;  in iio_hwmon_probe()
183 		a->index = i;  in iio_hwmon_probe()
184 		st->attrs[attr++] = &a->dev_attr.attr;  in iio_hwmon_probe()
189 	st->attr_group.attrs = st->attrs;  in iio_hwmon_probe()
190 	st->groups[0] = &st->attr_group;  in iio_hwmon_probe()
195 			return -ENOMEM;  in iio_hwmon_probe()
196 		strreplace(sname, '-', '_');  in iio_hwmon_probe()
202 							   st->groups);  in iio_hwmon_probe()
207 	{ .compatible = "iio-hwmon", },