Release 4.14 drivers/hwmon/vexpress-hwmon.c

Directory: drivers/hwmon
/*
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Copyright (C) 2012 ARM Limited
 */


#define DRVNAME "vexpress-hwmon"

#define pr_fmt(fmt) DRVNAME ": " fmt

#include <linux/device.h>
#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/vexpress.h>


struct vexpress_hwmon_data {
	
struct device *hwmon_dev;
	
struct regmap *reg;
};



static ssize_t vexpress_hwmon_label_show(struct device *dev,
		struct device_attribute *dev_attr, char *buffer)
{
	const char *label = of_get_property(dev->of_node, "label", NULL);

	return snprintf(buffer, PAGE_SIZE, "%s\n", label);
}

Contributors
Person Tokens Prop Commits CommitProp
Pawel Moll 48 100.00% 1 100.00%
Total 48 100.00% 1 100.00%



static ssize_t vexpress_hwmon_u32_show(struct device *dev,
		struct device_attribute *dev_attr, char *buffer)
{
	struct vexpress_hwmon_data *data = dev_get_drvdata(dev);
	int err;
	u32 value;

	err = regmap_read(data->reg, 0, &value);
	if (err)
		return err;

	return snprintf(buffer, PAGE_SIZE, "%u\n", value /
			to_sensor_dev_attr(dev_attr)->index);
}

Contributors
Person Tokens Prop Commits CommitProp
Pawel Moll 76 100.00% 2 100.00%
Total 76 100.00% 2 100.00%



static ssize_t vexpress_hwmon_u64_show(struct device *dev,
		struct device_attribute *dev_attr, char *buffer)
{
	struct vexpress_hwmon_data *data = dev_get_drvdata(dev);
	int err;
	u32 value_hi, value_lo;

	err = regmap_read(data->reg, 0, &value_lo);
	if (err)
		return err;

	err = regmap_read(data->reg, 1, &value_hi);
	if (err)
		return err;

	return snprintf(buffer, PAGE_SIZE, "%llu\n",
			div_u64(((u64)value_hi << 32) | value_lo,
			to_sensor_dev_attr(dev_attr)->index));
}

Contributors
Person Tokens Prop Commits CommitProp
Pawel Moll 111 100.00% 2 100.00%
Total 111 100.00% 2 100.00%



static umode_t vexpress_hwmon_attr_is_visible(struct kobject *kobj,
		struct attribute *attr, int index)
{
	struct device *dev = kobj_to_dev(kobj);
	struct device_attribute *dev_attr = container_of(attr,
				struct device_attribute, attr);

	if (dev_attr->show == vexpress_hwmon_label_show &&
			!of_get_property(dev->of_node, "label", NULL))
		return 0;

	return attr->mode;
}

Contributors
Person Tokens Prop Commits CommitProp
Pawel Moll 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%


struct vexpress_hwmon_type {
	
const char *name;
	
const struct attribute_group **attr_groups;
};

#if !defined(CONFIG_REGULATOR_VEXPRESS)
static DEVICE_ATTR(in1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, vexpress_hwmon_u32_show,
		NULL, 1000);

static struct attribute *vexpress_hwmon_attrs_volt[] = {
	&dev_attr_in1_label.attr,
	&sensor_dev_attr_in1_input.dev_attr.attr,
	NULL
};

static struct attribute_group vexpress_hwmon_group_volt = {
	.is_visible = vexpress_hwmon_attr_is_visible,
	.attrs = vexpress_hwmon_attrs_volt,
};

static struct vexpress_hwmon_type vexpress_hwmon_volt = {
	.name = "vexpress_volt",
	.attr_groups = (const struct attribute_group *[]) {
		&vexpress_hwmon_group_volt,
		NULL,
        },
};
#endif

static DEVICE_ATTR(curr1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, vexpress_hwmon_u32_show,
		NULL, 1000);

static struct attribute *vexpress_hwmon_attrs_amp[] = {
	&dev_attr_curr1_label.attr,
	&sensor_dev_attr_curr1_input.dev_attr.attr,
	NULL
};

static struct attribute_group vexpress_hwmon_group_amp = {
	.is_visible = vexpress_hwmon_attr_is_visible,
	.attrs = vexpress_hwmon_attrs_amp,
};

static struct vexpress_hwmon_type vexpress_hwmon_amp = {
	.name = "vexpress_amp",
	.attr_groups = (const struct attribute_group *[]) {
		&vexpress_hwmon_group_amp,
		NULL
	},
};

static DEVICE_ATTR(temp1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, vexpress_hwmon_u32_show,
		NULL, 1000);

static struct attribute *vexpress_hwmon_attrs_temp[] = {
	&dev_attr_temp1_label.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	NULL
};

static struct attribute_group vexpress_hwmon_group_temp = {
	.is_visible = vexpress_hwmon_attr_is_visible,
	.attrs = vexpress_hwmon_attrs_temp,
};

static struct vexpress_hwmon_type vexpress_hwmon_temp = {
	.name = "vexpress_temp",
	.attr_groups = (const struct attribute_group *[]) {
		&vexpress_hwmon_group_temp,
		NULL
	},
};

static DEVICE_ATTR(power1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, vexpress_hwmon_u32_show,
		NULL, 1);

static struct attribute *vexpress_hwmon_attrs_power[] = {
	&dev_attr_power1_label.attr,
	&sensor_dev_attr_power1_input.dev_attr.attr,
	NULL
};

static struct attribute_group vexpress_hwmon_group_power = {
	.is_visible = vexpress_hwmon_attr_is_visible,
	.attrs = vexpress_hwmon_attrs_power,
};

static struct vexpress_hwmon_type vexpress_hwmon_power = {
	.name = "vexpress_power",
	.attr_groups = (const struct attribute_group *[]) {
		&vexpress_hwmon_group_power,
		NULL
	},
};

static DEVICE_ATTR(energy1_label, S_IRUGO, vexpress_hwmon_label_show, NULL);
static SENSOR_DEVICE_ATTR(energy1_input, S_IRUGO, vexpress_hwmon_u64_show,
		NULL, 1);

static struct attribute *vexpress_hwmon_attrs_energy[] = {
	&dev_attr_energy1_label.attr,
	&sensor_dev_attr_energy1_input.dev_attr.attr,
	NULL
};

static struct attribute_group vexpress_hwmon_group_energy = {
	.is_visible = vexpress_hwmon_attr_is_visible,
	.attrs = vexpress_hwmon_attrs_energy,
};

static struct vexpress_hwmon_type vexpress_hwmon_energy = {
	.name = "vexpress_energy",
	.attr_groups = (const struct attribute_group *[]) {
		&vexpress_hwmon_group_energy,
		NULL
	},
};


static const struct of_device_id vexpress_hwmon_of_match[] = {
#if !defined(CONFIG_REGULATOR_VEXPRESS)
	{
		.compatible = "arm,vexpress-volt",
		.data = &vexpress_hwmon_volt,
        },
#endif
	{
		.compatible = "arm,vexpress-amp",
		.data = &vexpress_hwmon_amp,
        }, {
		.compatible = "arm,vexpress-temp",
		.data = &vexpress_hwmon_temp,
        }, {
		.compatible = "arm,vexpress-power",
		.data = &vexpress_hwmon_power,
        }, {
		.compatible = "arm,vexpress-energy",
		.data = &vexpress_hwmon_energy,
        },
	{}
};
MODULE_DEVICE_TABLE(of, vexpress_hwmon_of_match);



static int vexpress_hwmon_probe(struct platform_device *pdev)
{
	const struct of_device_id *match;
	struct vexpress_hwmon_data *data;
	const struct vexpress_hwmon_type *type;

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;
	platform_set_drvdata(pdev, data);

	match = of_match_device(vexpress_hwmon_of_match, &pdev->dev);
	if (!match)
		return -ENODEV;
	type = match->data;

	data->reg = devm_regmap_init_vexpress_config(&pdev->dev);
	if (IS_ERR(data->reg))
		return PTR_ERR(data->reg);

	data->hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
			type->name, data, type->attr_groups);

	return PTR_ERR_OR_ZERO(data->hwmon_dev);
}

Contributors
Person Tokens Prop Commits CommitProp
Pawel Moll 148 100.00% 4 100.00%
Total 148 100.00% 4 100.00%


static struct platform_driver vexpress_hwmon_driver = {
	.probe = vexpress_hwmon_probe,
	.driver	= {
		.name = DRVNAME,
		.of_match_table = vexpress_hwmon_of_match,
        },
};


module_platform_driver(vexpress_hwmon_driver);

MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
MODULE_DESCRIPTION("Versatile Express hwmon sensors driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:vexpress-hwmon");
Overall Contributors
Person Tokens Prop Commits CommitProp
Pawel Moll 1150 99.65% 5 71.43%
Guenter Roeck 3 0.26% 1 14.29%
Fabian Frederick 1 0.09% 1 14.29%
Total 1154 100.00% 7 100.00%
Directory: drivers/hwmon

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Pawel Moll	48	100.00%	1	100.00%
Total	48	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 drivers/hwmon/vexpress-hwmon.c

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