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3db47dc0ae
This driver register pm_power_off with snvs power off function. If your boards NOT use PMIC_ON_REQ to turn on/off external pmic, or use other pin to do, please disable the driver in dts, otherwise, your pm_power_off maybe overwrote by this driver. Signed-off-by: Robin Gong <b38343@freescale.com> Acked-By: Sebastian Reichel <sre@kernel.org> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* Power off driver for i.mx6
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* Copyright (c) 2014, FREESCALE CORPORATION. All rights reserved.
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*
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* based on msm-poweroff.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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static void __iomem *snvs_base;
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static void do_imx_poweroff(void)
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{
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u32 value = readl(snvs_base);
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/* set TOP and DP_EN bit */
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writel(value | 0x60, snvs_base);
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}
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static int imx_poweroff_probe(struct platform_device *pdev)
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{
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snvs_base = of_iomap(pdev->dev.of_node, 0);
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if (!snvs_base) {
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dev_err(&pdev->dev, "failed to get memory\n");
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return -ENODEV;
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}
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pm_power_off = do_imx_poweroff;
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return 0;
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}
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static const struct of_device_id of_imx_poweroff_match[] = {
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{ .compatible = "fsl,sec-v4.0-poweroff", },
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{},
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};
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MODULE_DEVICE_TABLE(of, of_imx_poweroff_match);
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static struct platform_driver imx_poweroff_driver = {
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.probe = imx_poweroff_probe,
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.driver = {
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.name = "imx-snvs-poweroff",
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.of_match_table = of_match_ptr(of_imx_poweroff_match),
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},
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};
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static int __init imx_poweroff_init(void)
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{
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return platform_driver_register(&imx_poweroff_driver);
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}
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device_initcall(imx_poweroff_init);
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