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/*
* dptf_power: DPTF platform power driver
* Copyright (c) 2016, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
/*
* Presentation of attributes which are defined for INT3407. They are:
* PMAX : Maximum platform powe
* PSRC : Platform power source
* ARTG : Adapter rating
* CTYP : Charger type
* PBSS : Battery steady power
*/
#define DPTF_POWER_SHOW(name, object) \
static ssize_t name##_show(struct device *dev,\
struct device_attribute *attr,\
char *buf)\
{\
struct platform_device *pdev = to_platform_device(dev);\
struct acpi_device *acpi_dev = platform_get_drvdata(pdev);\
unsigned long long val;\
acpi_status status;\
\
status = acpi_evaluate_integer(acpi_dev->handle, #object,\
NULL, &val);\
if (ACPI_SUCCESS(status))\
return sprintf(buf, "%d\n", (int)val);\
else \
return -EINVAL;\
}
DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
DPTF_POWER_SHOW(platform_power_source, PSRC)
DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
DPTF_POWER_SHOW(charger_type, CTYP)
static DEVICE_ATTR_RO(max_platform_power_mw);
static DEVICE_ATTR_RO(platform_power_source);
static DEVICE_ATTR_RO(adapter_rating_mw);
static DEVICE_ATTR_RO(battery_steady_power_mw);
static DEVICE_ATTR_RO(charger_type);
static struct attribute *dptf_power_attrs[] = {
&dev_attr_max_platform_power_mw.attr,
&dev_attr_platform_power_source.attr,
&dev_attr_adapter_rating_mw.attr,
&dev_attr_battery_steady_power_mw.attr,
&dev_attr_charger_type.attr,
NULL
};
static const struct attribute_group dptf_power_attribute_group = {
.attrs = dptf_power_attrs,
.name = "dptf_power"
};
static int dptf_power_add(struct platform_device *pdev)
{
struct acpi_device *acpi_dev;
acpi_status status;
unsigned long long ptype;
int result;
acpi_dev = ACPI_COMPANION(&(pdev->dev));
if (!acpi_dev)
return -ENODEV;
status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype);
if (ACPI_FAILURE(status))
return -ENODEV;
if (ptype != 0x11)
return -ENODEV;
result = sysfs_create_group(&pdev->dev.kobj,
&dptf_power_attribute_group);
if (result)
return result;
platform_set_drvdata(pdev, acpi_dev);
return 0;
}
static int dptf_power_remove(struct platform_device *pdev)
{
sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
return 0;
}
static const struct acpi_device_id int3407_device_ids[] = {
{"INT3407", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
static struct platform_driver dptf_power_driver = {
.probe = dptf_power_add,
.remove = dptf_power_remove,
.driver = {
.name = "DPTF Platform Power",
.acpi_match_table = int3407_device_ids,
},
};
module_platform_driver(dptf_power_driver);
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ACPI DPTF platform power driver");
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