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/* 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); |