diff options
Diffstat (limited to 'arch/arm/mach-vexpress/reset.c')
| -rw-r--r-- | arch/arm/mach-vexpress/reset.c | 141 | 
1 files changed, 0 insertions, 141 deletions
diff --git a/arch/arm/mach-vexpress/reset.c b/arch/arm/mach-vexpress/reset.c deleted file mode 100644 index 465923aa381..00000000000 --- a/arch/arm/mach-vexpress/reset.c +++ /dev/null @@ -1,141 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License 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. - * - * Copyright (C) 2012 ARM Limited - */ - -#include <linux/jiffies.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/platform_device.h> -#include <linux/stat.h> -#include <linux/vexpress.h> - -static void vexpress_reset_do(struct device *dev, const char *what) -{ -	int err = -ENOENT; -	struct vexpress_config_func *func = -			vexpress_config_func_get_by_dev(dev); - -	if (func) { -		unsigned long timeout; - -		err = vexpress_config_write(func, 0, 0); - -		timeout = jiffies + HZ; -		while (time_before(jiffies, timeout)) -			cpu_relax(); -	} - -	dev_emerg(dev, "Unable to %s (%d)\n", what, err); -} - -static struct device *vexpress_power_off_device; - -void vexpress_power_off(void) -{ -	vexpress_reset_do(vexpress_power_off_device, "power off"); -} - -static struct device *vexpress_restart_device; - -void vexpress_restart(char str, const char *cmd) -{ -	vexpress_reset_do(vexpress_restart_device, "restart"); -} - -static ssize_t vexpress_reset_active_show(struct device *dev, -		struct device_attribute *attr, char *buf) -{ -	return sprintf(buf, "%d\n", vexpress_restart_device == dev); -} - -static ssize_t vexpress_reset_active_store(struct device *dev, -		struct device_attribute *attr, const char *buf, size_t count) -{ -	long value; -	int err = kstrtol(buf, 0, &value); - -	if (!err && value) -		vexpress_restart_device = dev; - -	return err ? err : count; -} - -DEVICE_ATTR(active, S_IRUGO | S_IWUSR, vexpress_reset_active_show, -		vexpress_reset_active_store); - - -enum vexpress_reset_func { FUNC_RESET, FUNC_SHUTDOWN, FUNC_REBOOT }; - -static struct of_device_id vexpress_reset_of_match[] = { -	{ -		.compatible = "arm,vexpress-reset", -		.data = (void *)FUNC_RESET, -	}, { -		.compatible = "arm,vexpress-shutdown", -		.data = (void *)FUNC_SHUTDOWN -	}, { -		.compatible = "arm,vexpress-reboot", -		.data = (void *)FUNC_REBOOT -	}, -	{} -}; - -static int vexpress_reset_probe(struct platform_device *pdev) -{ -	enum vexpress_reset_func func; -	const struct of_device_id *match = -			of_match_device(vexpress_reset_of_match, &pdev->dev); - -	if (match) -		func = (enum vexpress_reset_func)match->data; -	else -		func = pdev->id_entry->driver_data; - -	switch (func) { -	case FUNC_SHUTDOWN: -		vexpress_power_off_device = &pdev->dev; -		break; -	case FUNC_RESET: -		if (!vexpress_restart_device) -			vexpress_restart_device = &pdev->dev; -		device_create_file(&pdev->dev, &dev_attr_active); -		break; -	case FUNC_REBOOT: -		vexpress_restart_device = &pdev->dev; -		device_create_file(&pdev->dev, &dev_attr_active); -		break; -	}; - -	return 0; -} - -static const struct platform_device_id vexpress_reset_id_table[] = { -	{ .name = "vexpress-reset", .driver_data = FUNC_RESET, }, -	{ .name = "vexpress-shutdown", .driver_data = FUNC_SHUTDOWN, }, -	{ .name = "vexpress-reboot", .driver_data = FUNC_REBOOT, }, -	{} -}; - -static struct platform_driver vexpress_reset_driver = { -	.probe = vexpress_reset_probe, -	.driver = { -		.name = "vexpress-reset", -		.of_match_table = vexpress_reset_of_match, -	}, -	.id_table = vexpress_reset_id_table, -}; - -static int __init vexpress_reset_init(void) -{ -	return platform_driver_register(&vexpress_reset_driver); -} -device_initcall(vexpress_reset_init);  |