mirror of https://gitee.com/openkylin/linux.git
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* Power off driver for i.mx6
|
|
* Copyright (c) 2014, FREESCALE CORPORATION. All rights reserved.
|
|
*
|
|
* based on msm-poweroff.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
static void __iomem *snvs_base;
|
|
|
|
static void do_imx_poweroff(void)
|
|
{
|
|
u32 value = readl(snvs_base);
|
|
|
|
/* set TOP and DP_EN bit */
|
|
writel(value | 0x60, snvs_base);
|
|
}
|
|
|
|
static int imx_poweroff_probe(struct platform_device *pdev)
|
|
{
|
|
snvs_base = of_iomap(pdev->dev.of_node, 0);
|
|
if (!snvs_base) {
|
|
dev_err(&pdev->dev, "failed to get memory\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
pm_power_off = do_imx_poweroff;
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id of_imx_poweroff_match[] = {
|
|
{ .compatible = "fsl,sec-v4.0-poweroff", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_imx_poweroff_match);
|
|
|
|
static struct platform_driver imx_poweroff_driver = {
|
|
.probe = imx_poweroff_probe,
|
|
.driver = {
|
|
.name = "imx-snvs-poweroff",
|
|
.of_match_table = of_match_ptr(of_imx_poweroff_match),
|
|
},
|
|
};
|
|
|
|
static int __init imx_poweroff_init(void)
|
|
{
|
|
return platform_driver_register(&imx_poweroff_driver);
|
|
}
|
|
device_initcall(imx_poweroff_init);
|