projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 3db47dc0 RG |
1 | /* Power off driver for i.mx6 |
| 2 | * Copyright (c) 2014, FREESCALE CORPORATION. All rights reserved. | |
| 3 | * | |
| 4 | * based on msm-poweroff.c | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 and | |
| 8 | * only version 2 as published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/err.h> | |
| 18 | #include <linux/init.h> | |
| 19 | #include <linux/io.h> | |
| 20 | #include <linux/kernel.h> | |
| 21 | #include <linux/module.h> | |
| 22 | #include <linux/of.h> | |
| 23 | #include <linux/of_address.h> | |
| 24 | #include <linux/platform_device.h> | |
| 25 | ||
| 26 | static void __iomem *snvs_base; | |
| 27 | ||
| 28 | static void do_imx_poweroff(void) | |
| 29 | { | |
| 30 | u32 value = readl(snvs_base); | |
| 31 | ||
| 32 | /* set TOP and DP_EN bit */ | |
| 33 | writel(value | 0x60, snvs_base); | |
| 34 | } | |
| 35 | ||
| 36 | static int imx_poweroff_probe(struct platform_device *pdev) | |
| 37 | { | |
| 38 | snvs_base = of_iomap(pdev->dev.of_node, 0); | |
| 39 | if (!snvs_base) { | |
| 40 | dev_err(&pdev->dev, "failed to get memory\n"); | |
| 41 | return -ENODEV; | |
| 42 | } | |
| 43 | ||
| 44 | pm_power_off = do_imx_poweroff; | |
| 45 | return 0; | |
| 46 | } | |
| 47 | ||
| 48 | static const struct of_device_id of_imx_poweroff_match[] = { | |
| 49 | { .compatible = "fsl,sec-v4.0-poweroff", }, | |
| 50 | {}, | |
| 51 | }; | |
| 52 | MODULE_DEVICE_TABLE(of, of_imx_poweroff_match); | |
| 53 | ||
| 54 | static struct platform_driver imx_poweroff_driver = { | |
| 55 | .probe = imx_poweroff_probe, | |
| 56 | .driver = { | |
| 57 | .name = "imx-snvs-poweroff", | |
| 58 | .of_match_table = of_match_ptr(of_imx_poweroff_match), | |
| 59 | }, | |
| 60 | }; | |
| 61 | ||
| 62 | static int __init imx_poweroff_init(void) | |
| 63 | { | |
| 64 | return platform_driver_register(&imx_poweroff_driver); | |
| 65 | } | |
| 66 | device_initcall(imx_poweroff_init); |