This driver can also be built as a module. If so, the module
will be called ibmpex.
+config SENSORS_IIO_HWMON
+ tristate "Hwmon driver that uses channels specified via iio maps"
+ depends on IIO
+ help
+ This is a platform driver that in combination with a suitable
+ map allows IIO devices to provide basic hwmon functionality
+ for those channels specified in the map. This map can be provided
+ either via platform data or the device tree bindings.
+
config SENSORS_IT87
tristate "ITE IT87xx and compatibles"
depends on !PPC
obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o
obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
+obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o
obj-$(CONFIG_SENSORS_INA209) += ina209.o
obj-$(CONFIG_SENSORS_INA2XX) += ina2xx.o
obj-$(CONFIG_SENSORS_IT87) += it87.o
--- /dev/null
+/* Hwmon client for industrial I/O devices
+ *
+ * Copyright (c) 2011 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/of.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/iio/consumer.h>
+#include <linux/iio/types.h>
+
+/**
+ * struct iio_hwmon_state - device instance state
+ * @channels: filled with array of channels from iio
+ * @num_channels: number of channels in channels (saves counting twice)
+ * @hwmon_dev: associated hwmon device
+ * @attr_group: the group of attributes
+ * @attrs: null terminated array of attribute pointers.
+ */
+struct iio_hwmon_state {
+ struct iio_channel *channels;
+ int num_channels;
+ struct device *hwmon_dev;
+ struct attribute_group attr_group;
+ struct attribute **attrs;
+};
+
+/*
+ * Assumes that IIO and hwmon operate in the same base units.
+ * This is supposed to be true, but needs verification for
+ * new channel types.
+ */
+static ssize_t iio_hwmon_read_val(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int result;
+ int ret;
+ struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
+ struct iio_hwmon_state *state = dev_get_drvdata(dev);
+
+ ret = iio_read_channel_processed(&state->channels[sattr->index],
+ &result);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", result);
+}
+
+static ssize_t show_name(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ const char *name = "iio_hwmon";
+
+ if (dev->of_node && dev->of_node->name)
+ name = dev->of_node->name;
+
+ return sprintf(buf, "%s\n", name);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+
+static int iio_hwmon_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct iio_hwmon_state *st;
+ struct sensor_device_attribute *a;
+ int ret, i;
+ int in_i = 1, temp_i = 1, curr_i = 1;
+ enum iio_chan_type type;
+ struct iio_channel *channels;
+
+ channels = iio_channel_get_all(dev);
+ if (IS_ERR(channels))
+ return PTR_ERR(channels);
+
+ st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL);
+ if (st == NULL)
+ return -ENOMEM;
+
+ st->channels = channels;
+
+ /* count how many attributes we have */
+ while (st->channels[st->num_channels].indio_dev)
+ st->num_channels++;
+
+ st->attrs = devm_kzalloc(dev,
+ sizeof(*st->attrs) * (st->num_channels + 2),
+ GFP_KERNEL);
+ if (st->attrs == NULL) {
+ ret = -ENOMEM;
+ goto error_release_channels;
+ }
+
+ for (i = 0; i < st->num_channels; i++) {
+ a = devm_kzalloc(dev, sizeof(*a), GFP_KERNEL);
+ if (a == NULL) {
+ ret = -ENOMEM;
+ goto error_release_channels;
+ }
+
+ sysfs_attr_init(&a->dev_attr.attr);
+ ret = iio_get_channel_type(&st->channels[i], &type);
+ if (ret < 0)
+ goto error_release_channels;
+
+ switch (type) {
+ case IIO_VOLTAGE:
+ a->dev_attr.attr.name = kasprintf(GFP_KERNEL,
+ "in%d_input",
+ in_i++);
+ break;
+ case IIO_TEMP:
+ a->dev_attr.attr.name = kasprintf(GFP_KERNEL,
+ "temp%d_input",
+ temp_i++);
+ break;
+ case IIO_CURRENT:
+ a->dev_attr.attr.name = kasprintf(GFP_KERNEL,
+ "curr%d_input",
+ curr_i++);
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_release_channels;
+ }
+ if (a->dev_attr.attr.name == NULL) {
+ ret = -ENOMEM;
+ goto error_release_channels;
+ }
+ a->dev_attr.show = iio_hwmon_read_val;
+ a->dev_attr.attr.mode = S_IRUGO;
+ a->index = i;
+ st->attrs[i] = &a->dev_attr.attr;
+ }
+ st->attrs[st->num_channels] = &dev_attr_name.attr;
+ st->attr_group.attrs = st->attrs;
+ platform_set_drvdata(pdev, st);
+ ret = sysfs_create_group(&dev->kobj, &st->attr_group);
+ if (ret < 0)
+ goto error_release_channels;
+
+ st->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(st->hwmon_dev)) {
+ ret = PTR_ERR(st->hwmon_dev);
+ goto error_remove_group;
+ }
+ return 0;
+
+error_remove_group:
+ sysfs_remove_group(&dev->kobj, &st->attr_group);
+error_release_channels:
+ iio_channel_release_all(st->channels);
+ return ret;
+}
+
+static int iio_hwmon_remove(struct platform_device *pdev)
+{
+ struct iio_hwmon_state *st = platform_get_drvdata(pdev);
+
+ hwmon_device_unregister(st->hwmon_dev);
+ sysfs_remove_group(&pdev->dev.kobj, &st->attr_group);
+ iio_channel_release_all(st->channels);
+
+ return 0;
+}
+
+static struct of_device_id iio_hwmon_of_match[] = {
+ { .compatible = "iio-hwmon", },
+ { }
+};
+
+static struct platform_driver __refdata iio_hwmon_driver = {
+ .driver = {
+ .name = "iio_hwmon",
+ .owner = THIS_MODULE,
+ .of_match_table = iio_hwmon_of_match,
+ },
+ .probe = iio_hwmon_probe,
+ .remove = iio_hwmon_remove,
+};
+
+module_platform_driver(iio_hwmon_driver);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("IIO to hwmon driver");
+MODULE_LICENSE("GPL v2");
menu "IIO staging drivers"
depends on IIO
-config IIO_ST_HWMON
- tristate "Hwmon driver that uses channels specified via iio maps"
- depends on HWMON
- help
- This is a platform driver that in combination with a suitable
- map allows IIO devices to provide basic hwmon functionality
- for those channels specified in the map.
-
source "drivers/staging/iio/accel/Kconfig"
source "drivers/staging/iio/adc/Kconfig"
source "drivers/staging/iio/addac/Kconfig"
obj-$(CONFIG_IIO_DUMMY_EVGEN) += iio_dummy_evgen.o
-obj-$(CONFIG_IIO_ST_HWMON) += iio_hwmon.o
-
obj-y += accel/
obj-y += adc/
obj-y += addac/
+++ /dev/null
-/* Hwmon client for industrial I/O devices
- *
- * Copyright (c) 2011 Jonathan Cameron
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/hwmon.h>
-#include <linux/of.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/iio/consumer.h>
-#include <linux/iio/types.h>
-
-/**
- * struct iio_hwmon_state - device instance state
- * @channels: filled with array of channels from iio
- * @num_channels: number of channels in channels (saves counting twice)
- * @hwmon_dev: associated hwmon device
- * @attr_group: the group of attributes
- * @attrs: null terminated array of attribute pointers.
- */
-struct iio_hwmon_state {
- struct iio_channel *channels;
- int num_channels;
- struct device *hwmon_dev;
- struct attribute_group attr_group;
- struct attribute **attrs;
-};
-
-/*
- * Assumes that IIO and hwmon operate in the same base units.
- * This is supposed to be true, but needs verification for
- * new channel types.
- */
-static ssize_t iio_hwmon_read_val(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- int result;
- int ret;
- struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
- struct iio_hwmon_state *state = dev_get_drvdata(dev);
-
- ret = iio_read_channel_processed(&state->channels[sattr->index],
- &result);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", result);
-}
-
-static ssize_t show_name(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- const char *name = "iio_hwmon";
-
- if (dev->of_node && dev->of_node->name)
- name = dev->of_node->name;
-
- return sprintf(buf, "%s\n", name);
-}
-
-static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
-
-static int iio_hwmon_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct iio_hwmon_state *st;
- struct sensor_device_attribute *a;
- int ret, i;
- int in_i = 1, temp_i = 1, curr_i = 1;
- enum iio_chan_type type;
- struct iio_channel *channels;
-
- channels = iio_channel_get_all(dev);
- if (IS_ERR(channels))
- return PTR_ERR(channels);
-
- st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL);
- if (st == NULL)
- return -ENOMEM;
-
- st->channels = channels;
-
- /* count how many attributes we have */
- while (st->channels[st->num_channels].indio_dev)
- st->num_channels++;
-
- st->attrs = devm_kzalloc(dev,
- sizeof(*st->attrs) * (st->num_channels + 2),
- GFP_KERNEL);
- if (st->attrs == NULL) {
- ret = -ENOMEM;
- goto error_release_channels;
- }
-
- for (i = 0; i < st->num_channels; i++) {
- a = devm_kzalloc(dev, sizeof(*a), GFP_KERNEL);
- if (a == NULL) {
- ret = -ENOMEM;
- goto error_release_channels;
- }
-
- sysfs_attr_init(&a->dev_attr.attr);
- ret = iio_get_channel_type(&st->channels[i], &type);
- if (ret < 0)
- goto error_release_channels;
-
- switch (type) {
- case IIO_VOLTAGE:
- a->dev_attr.attr.name = kasprintf(GFP_KERNEL,
- "in%d_input",
- in_i++);
- break;
- case IIO_TEMP:
- a->dev_attr.attr.name = kasprintf(GFP_KERNEL,
- "temp%d_input",
- temp_i++);
- break;
- case IIO_CURRENT:
- a->dev_attr.attr.name = kasprintf(GFP_KERNEL,
- "curr%d_input",
- curr_i++);
- break;
- default:
- ret = -EINVAL;
- goto error_release_channels;
- }
- if (a->dev_attr.attr.name == NULL) {
- ret = -ENOMEM;
- goto error_release_channels;
- }
- a->dev_attr.show = iio_hwmon_read_val;
- a->dev_attr.attr.mode = S_IRUGO;
- a->index = i;
- st->attrs[i] = &a->dev_attr.attr;
- }
- st->attrs[st->num_channels] = &dev_attr_name.attr;
- st->attr_group.attrs = st->attrs;
- platform_set_drvdata(pdev, st);
- ret = sysfs_create_group(&dev->kobj, &st->attr_group);
- if (ret < 0)
- goto error_release_channels;
-
- st->hwmon_dev = hwmon_device_register(dev);
- if (IS_ERR(st->hwmon_dev)) {
- ret = PTR_ERR(st->hwmon_dev);
- goto error_remove_group;
- }
- return 0;
-
-error_remove_group:
- sysfs_remove_group(&dev->kobj, &st->attr_group);
-error_release_channels:
- iio_channel_release_all(st->channels);
- return ret;
-}
-
-static int iio_hwmon_remove(struct platform_device *pdev)
-{
- struct iio_hwmon_state *st = platform_get_drvdata(pdev);
-
- hwmon_device_unregister(st->hwmon_dev);
- sysfs_remove_group(&pdev->dev.kobj, &st->attr_group);
- iio_channel_release_all(st->channels);
-
- return 0;
-}
-
-static struct of_device_id iio_hwmon_of_match[] = {
- { .compatible = "iio-hwmon", },
- { }
-};
-
-static struct platform_driver __refdata iio_hwmon_driver = {
- .driver = {
- .name = "iio_hwmon",
- .owner = THIS_MODULE,
- .of_match_table = iio_hwmon_of_match,
- },
- .probe = iio_hwmon_probe,
- .remove = iio_hwmon_remove,
-};
-
-module_platform_driver(iio_hwmon_driver);
-
-MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
-MODULE_DESCRIPTION("IIO to hwmon driver");
-MODULE_LICENSE("GPL v2");
projects / mirror_ubuntu-eoan-kernel.git / commitdiff