1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/hwmon-sysfs.h>
19  * struct iio_hwmon_state - device instance state
47 	struct iio_channel *chan = &state->channels[sattr->index];  in iio_hwmon_read_val()
59 		result *= 1000; /* mili-Watts to micro-Watts conversion */  in iio_hwmon_read_val()
66 	struct device *dev = &pdev->dev;  in iio_hwmon_probe()
78 		if (PTR_ERR(channels) == -ENODEV)  in iio_hwmon_probe()
79 			return -EPROBE_DEFER;  in iio_hwmon_probe()
85 		return -ENOMEM;  in iio_hwmon_probe()
87 	st->channels = channels;  in iio_hwmon_probe()
90 	while (st->channels[st->num_channels].indio_dev)  in iio_hwmon_probe()
91 		st->num_channels++;  in iio_hwmon_probe()
93 	st->attrs = devm_kcalloc(dev,  in iio_hwmon_probe()
94 				 st->num_channels + 1, sizeof(*st->attrs),  in iio_hwmon_probe()
96 	if (st->attrs == NULL)  in iio_hwmon_probe()
97 		return -ENOMEM;  in iio_hwmon_probe()
99 	for (i = 0; i < st->num_channels; i++) {  in iio_hwmon_probe()
105 			return -ENOMEM;  in iio_hwmon_probe()
107 		sysfs_attr_init(&a->dev_attr.attr);  in iio_hwmon_probe()
108 		ret = iio_get_channel_type(&st->channels[i], &type);  in iio_hwmon_probe()
134 			return -EINVAL;  in iio_hwmon_probe()
137 		a->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,  in iio_hwmon_probe()
140 		if (a->dev_attr.attr.name == NULL)  in iio_hwmon_probe()
141 			return -ENOMEM;  in iio_hwmon_probe()
143 		a->dev_attr.show = iio_hwmon_read_val;  in iio_hwmon_probe()
144 		a->dev_attr.attr.mode = 0444;  in iio_hwmon_probe()
145 		a->index = i;  in iio_hwmon_probe()
146 		st->attrs[i] = &a->dev_attr.attr;  in iio_hwmon_probe()
149 	st->attr_group.attrs = st->attrs;  in iio_hwmon_probe()
150 	st->groups[0] = &st->attr_group;  in iio_hwmon_probe()
152 	if (dev->of_node) {  in iio_hwmon_probe()
153 		sname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node);  in iio_hwmon_probe()
155 			return -ENOMEM;  in iio_hwmon_probe()
156 		strreplace(sname, '-', '_');  in iio_hwmon_probe()
162 							   st->groups);  in iio_hwmon_probe()
167 	{ .compatible = "iio-hwmon", },