9e4de6a8ee
attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work with const
attribute_group. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
904 496 0 1400 578 drivers/acpi/dptf/dptf_power.o
File size After adding 'const':
text data bss dec hex filename
944 432 0 1376 560 drivers/acpi/dptf/dptf_power.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/*
|
|
* 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");
|