diff options
author | Abhimanyu Kapur <abhimany@codeaurora.org> | 2013-07-31 00:05:28 (GMT) |
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committer | Anton Vorontsov <anton@enomsg.org> | 2013-08-09 18:47:53 (GMT) |
commit | 78be3176c4335b8ff3d9625ed3fc571e7d2ba8f4 (patch) | |
tree | 08a71d66ac0069147b18f76e3265f7b9b8bbbc84 /drivers/power/reset/msm-poweroff.c | |
parent | 68ace3e1886b94925c73e08702437f6dcd539a4d (diff) | |
download | linux-78be3176c4335b8ff3d9625ed3fc571e7d2ba8f4.tar.xz |
power: reset: Add msm restart support
Add support for restart and poweroff functionality present on MSM chipsets
with the MPM2 ps-hold hardware.
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>
Tested-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
Diffstat (limited to 'drivers/power/reset/msm-poweroff.c')
-rw-r--r-- | drivers/power/reset/msm-poweroff.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/power/reset/msm-poweroff.c b/drivers/power/reset/msm-poweroff.c new file mode 100644 index 0000000..774f9a3 --- /dev/null +++ b/drivers/power/reset/msm-poweroff.c @@ -0,0 +1,73 @@ +/* Copyright (c) 2013, The Linux Foundation. All rights reserved. + * + * 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/delay.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/reboot.h> + +#include <asm/system_misc.h> + +static void __iomem *msm_ps_hold; + +static void do_msm_restart(enum reboot_mode reboot_mode, const char *cmd) +{ + writel(0, msm_ps_hold); + mdelay(10000); +} + +static void do_msm_poweroff(void) +{ + /* TODO: Add poweroff capability */ + do_msm_restart(REBOOT_HARD, NULL); +} + +static int msm_restart_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *mem; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + msm_ps_hold = devm_ioremap_resource(dev, mem); + if (IS_ERR(msm_ps_hold)) + return PTR_ERR(msm_ps_hold); + + pm_power_off = do_msm_poweroff; + arm_pm_restart = do_msm_restart; + return 0; +} + +static const struct of_device_id of_msm_restart_match[] = { + { .compatible = "qcom,pshold", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_msm_restart_match); + +static struct platform_driver msm_restart_driver = { + .probe = msm_restart_probe, + .driver = { + .name = "msm-restart", + .of_match_table = of_match_ptr(of_msm_restart_match), + }, +}; + +static int __init msm_restart_init(void) +{ + return platform_driver_register(&msm_restart_driver); +} +device_initcall(msm_restart_init); |