1 // SPDX-License-Identifier: GPL-2.0-only
16 #include <linux/hwmon-sysfs.h>
21  * struct iio_hwmon_state - device instance state
49 	struct iio_channel *chan = &state->channels[sattr->index];  in iio_hwmon_read_val()
61 		result *= 1000; /* mili-Watts to micro-Watts conversion */  in iio_hwmon_read_val()
68 	struct device *dev = &pdev->dev;  in iio_hwmon_probe()
81 		if (ret == -ENODEV)  in iio_hwmon_probe()
82 			ret = -EPROBE_DEFER;  in iio_hwmon_probe()
89 		return -ENOMEM;  in iio_hwmon_probe()
91 	st->channels = channels;  in iio_hwmon_probe()
94 	while (st->channels[st->num_channels].indio_dev)  in iio_hwmon_probe()
95 		st->num_channels++;  in iio_hwmon_probe()
97 	st->attrs = devm_kcalloc(dev,  in iio_hwmon_probe()
98 				 st->num_channels + 1, sizeof(*st->attrs),  in iio_hwmon_probe()
100 	if (st->attrs == NULL)  in iio_hwmon_probe()
101 		return -ENOMEM;  in iio_hwmon_probe()
103 	for (i = 0; i < st->num_channels; i++) {  in iio_hwmon_probe()
109 			return -ENOMEM;  in iio_hwmon_probe()
111 		sysfs_attr_init(&a->dev_attr.attr);  in iio_hwmon_probe()
112 		ret = iio_get_channel_type(&st->channels[i], &type);  in iio_hwmon_probe()
138 			return -EINVAL;  in iio_hwmon_probe()
141 		a->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,  in iio_hwmon_probe()
144 		if (a->dev_attr.attr.name == NULL)  in iio_hwmon_probe()
145 			return -ENOMEM;  in iio_hwmon_probe()
147 		a->dev_attr.show = iio_hwmon_read_val;  in iio_hwmon_probe()
148 		a->dev_attr.attr.mode = 0444;  in iio_hwmon_probe()
149 		a->index = i;  in iio_hwmon_probe()
150 		st->attrs[i] = &a->dev_attr.attr;  in iio_hwmon_probe()
153 	st->attr_group.attrs = st->attrs;  in iio_hwmon_probe()
154 	st->groups[0] = &st->attr_group;  in iio_hwmon_probe()
159 			return -ENOMEM;  in iio_hwmon_probe()
160 		strreplace(sname, '-', '_');  in iio_hwmon_probe()
166 							   st->groups);  in iio_hwmon_probe()
171 	{ .compatible = "iio-hwmon", },