Hello,
On 01/22/2015 09:08 AM, Stefan Wahren wrote:
>
> In the meantime i made some bugfixes on these patches. Now i think it
> would be better to integrate the on-chip regulator driver into the patch
> series. That would clarify the function of the power driver.
>
I was about to resend this series with a poweroff driver for the imx28
SoCs. Should I wait this series get merged?
I thought adding a poweroff child node like this:
power: power@80044000 {
...
poweroff: poweroff@80044100 {
compatible = "fsl,imx28-poweroff";
reg = <0x80044100 0x10>;
};
...
};
Here is the driver:
/*
* MXS SoCs reset code.
*
* Copyright (c) 2015 Armadeus Systems.
*
* Author: Sébastien Szymanski <sebastien.szymanski@xxxxxxxxxxxx>
*
* based on imx-snvs-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>
#define MXS_SET_ADDR 0x4
#define POWER_RESET_UNLOCK__KEY (0x3E77 << 16)
#define POWER_RESET_PWD 0x1
static void __iomem *power_reset;
static void do_mxs_poweroff(void)
{
writel(POWER_RESET_UNLOCK__KEY | POWER_RESET_PWD,
power_reset + MXS_SET_ADDR);
}
static int mxs_poweroff_probe(struct platform_device *pdev)
{
power_reset = of_iomap(pdev->dev.of_node, 0);
if (!power_reset) {
dev_err(&pdev->dev, "failed to get memory\n");
return -ENODEV;
}
pm_power_off = do_mxs_poweroff;
dev_info(&pdev->dev, "power off function set!\n");
return 0;
}
static const struct of_device_id of_mxs_poweroff_match[] = {
{ .compatible = "fsl,imx28-poweroff", },
{},
};
MODULE_DEVICE_TABLE(of, of_mxs_poweroff_match);
static struct platform_driver mxs_poweroff_driver = {
.probe = mxs_poweroff_probe,
.driver = {
.name = "mxs-poweroff",
.of_match_table = of_match_ptr(of_mxs_poweroff_match),
},
};
static int __init mxs_poweroff_init(void)
{
return platform_driver_register(&mxs_poweroff_driver);
}
device_initcall(mxs_poweroff_init);
Best Regards,
--
Sébastien SZYMANSKI
Software Engineer
Armadeus Systems - A new vision of the embedded world
sebastien.szymanski@xxxxxxxxxxxx
Tel: +33 (0)9 72 29 41 44
Fax: +33 (0)9 72 28 79 26
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