1 // SPDX-License-Identifier: GPL-2.0-only
16 #include <linux/hwmon-sysfs.h>
17 #include <linux/iio/consumer.h>
18 #include <linux/iio/types.h>
21  * struct iio_hwmon_state - device instance state
22  * @channels:		filled with array of channels from iio
37  * Assumes that IIO and hwmon operate in the same base units.
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()
80 		if (PTR_ERR(channels) == -ENODEV)  in iio_hwmon_probe()
81 			return -EPROBE_DEFER;  in iio_hwmon_probe()
87 		return -ENOMEM;  in iio_hwmon_probe()
89 	st->channels = channels;  in iio_hwmon_probe()
92 	while (st->channels[st->num_channels].indio_dev)  in iio_hwmon_probe()
93 		st->num_channels++;  in iio_hwmon_probe()
95 	st->attrs = devm_kcalloc(dev,  in iio_hwmon_probe()
96 				 st->num_channels + 1, sizeof(*st->attrs),  in iio_hwmon_probe()
98 	if (st->attrs == NULL)  in iio_hwmon_probe()
99 		return -ENOMEM;  in iio_hwmon_probe()
101 	for (i = 0; i < st->num_channels; i++) {  in iio_hwmon_probe()
107 			return -ENOMEM;  in iio_hwmon_probe()
109 		sysfs_attr_init(&a->dev_attr.attr);  in iio_hwmon_probe()
110 		ret = iio_get_channel_type(&st->channels[i], &type);  in iio_hwmon_probe()
136 			return -EINVAL;  in iio_hwmon_probe()
139 		a->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,  in iio_hwmon_probe()
142 		if (a->dev_attr.attr.name == NULL)  in iio_hwmon_probe()
143 			return -ENOMEM;  in iio_hwmon_probe()
145 		a->dev_attr.show = iio_hwmon_read_val;  in iio_hwmon_probe()
146 		a->dev_attr.attr.mode = 0444;  in iio_hwmon_probe()
147 		a->index = i;  in iio_hwmon_probe()
148 		st->attrs[i] = &a->dev_attr.attr;  in iio_hwmon_probe()
151 	st->attr_group.attrs = st->attrs;  in iio_hwmon_probe()
152 	st->groups[0] = &st->attr_group;  in iio_hwmon_probe()
157 			return -ENOMEM;  in iio_hwmon_probe()
158 		strreplace(sname, '-', '_');  in iio_hwmon_probe()
164 							   st->groups);  in iio_hwmon_probe()
169 	{ .compatible = "iio-hwmon", },
185 MODULE_DESCRIPTION("IIO to hwmon driver");