mirror of https://gitee.com/openkylin/linux.git
164 lines
3.9 KiB
C
164 lines
3.9 KiB
C
/*
|
|
* rfkill-regulator.c - Regulator consumer driver for rfkill
|
|
*
|
|
* Copyright (C) 2009 Guiming Zhuo <gmzhuo@gmail.com>
|
|
* Copyright (C) 2011 Antonio Ospite <ospite@studenti.unina.it>
|
|
*
|
|
* Implementation inspired by leds-regulator driver.
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/rfkill.h>
|
|
#include <linux/rfkill-regulator.h>
|
|
|
|
struct rfkill_regulator_data {
|
|
struct rfkill *rf_kill;
|
|
bool reg_enabled;
|
|
|
|
struct regulator *vcc;
|
|
};
|
|
|
|
static int rfkill_regulator_set_block(void *data, bool blocked)
|
|
{
|
|
struct rfkill_regulator_data *rfkill_data = data;
|
|
|
|
pr_debug("%s: blocked: %d\n", __func__, blocked);
|
|
|
|
if (blocked) {
|
|
if (rfkill_data->reg_enabled) {
|
|
regulator_disable(rfkill_data->vcc);
|
|
rfkill_data->reg_enabled = 0;
|
|
}
|
|
} else {
|
|
if (!rfkill_data->reg_enabled) {
|
|
regulator_enable(rfkill_data->vcc);
|
|
rfkill_data->reg_enabled = 1;
|
|
}
|
|
}
|
|
|
|
pr_debug("%s: regulator_is_enabled after set_block: %d\n", __func__,
|
|
regulator_is_enabled(rfkill_data->vcc));
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct rfkill_ops rfkill_regulator_ops = {
|
|
.set_block = rfkill_regulator_set_block,
|
|
};
|
|
|
|
static int __devinit rfkill_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct rfkill_regulator_platform_data *pdata = pdev->dev.platform_data;
|
|
struct rfkill_regulator_data *rfkill_data;
|
|
struct regulator *vcc;
|
|
struct rfkill *rf_kill;
|
|
int ret = 0;
|
|
|
|
if (pdata == NULL) {
|
|
dev_err(&pdev->dev, "no platform data\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (pdata->name == NULL || pdata->type == 0) {
|
|
dev_err(&pdev->dev, "invalid name or type in platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
vcc = regulator_get_exclusive(&pdev->dev, "vrfkill");
|
|
if (IS_ERR(vcc)) {
|
|
dev_err(&pdev->dev, "Cannot get vcc for %s\n", pdata->name);
|
|
ret = PTR_ERR(vcc);
|
|
goto out;
|
|
}
|
|
|
|
rfkill_data = kzalloc(sizeof(*rfkill_data), GFP_KERNEL);
|
|
if (rfkill_data == NULL) {
|
|
ret = -ENOMEM;
|
|
goto err_data_alloc;
|
|
}
|
|
|
|
rf_kill = rfkill_alloc(pdata->name, &pdev->dev,
|
|
pdata->type,
|
|
&rfkill_regulator_ops, rfkill_data);
|
|
if (rf_kill == NULL) {
|
|
ret = -ENOMEM;
|
|
goto err_rfkill_alloc;
|
|
}
|
|
|
|
if (regulator_is_enabled(vcc)) {
|
|
dev_dbg(&pdev->dev, "Regulator already enabled\n");
|
|
rfkill_data->reg_enabled = 1;
|
|
}
|
|
rfkill_data->vcc = vcc;
|
|
rfkill_data->rf_kill = rf_kill;
|
|
|
|
ret = rfkill_register(rf_kill);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Cannot register rfkill device\n");
|
|
goto err_rfkill_register;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, rfkill_data);
|
|
dev_info(&pdev->dev, "%s initialized\n", pdata->name);
|
|
|
|
return 0;
|
|
|
|
err_rfkill_register:
|
|
rfkill_destroy(rf_kill);
|
|
err_rfkill_alloc:
|
|
kfree(rfkill_data);
|
|
err_data_alloc:
|
|
regulator_put(vcc);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit rfkill_regulator_remove(struct platform_device *pdev)
|
|
{
|
|
struct rfkill_regulator_data *rfkill_data = platform_get_drvdata(pdev);
|
|
struct rfkill *rf_kill = rfkill_data->rf_kill;
|
|
|
|
rfkill_unregister(rf_kill);
|
|
rfkill_destroy(rf_kill);
|
|
regulator_put(rfkill_data->vcc);
|
|
kfree(rfkill_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver rfkill_regulator_driver = {
|
|
.probe = rfkill_regulator_probe,
|
|
.remove = __devexit_p(rfkill_regulator_remove),
|
|
.driver = {
|
|
.name = "rfkill-regulator",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init rfkill_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&rfkill_regulator_driver);
|
|
}
|
|
module_init(rfkill_regulator_init);
|
|
|
|
static void __exit rfkill_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&rfkill_regulator_driver);
|
|
}
|
|
module_exit(rfkill_regulator_exit);
|
|
|
|
MODULE_AUTHOR("Guiming Zhuo <gmzhuo@gmail.com>");
|
|
MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
|
|
MODULE_DESCRIPTION("Regulator consumer driver for rfkill");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:rfkill-regulator");
|