/* * Copyright (C) 2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2009 PetaLogix * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include <linux/init.h>#include <linux/of_platform.h>#include <asm/prom.h> /* Trigger specific functions */#ifdef CONFIG_GPIOLIB #include <linux/of_gpio.h> static int handle; /* reset pin handle */static unsigned int reset_val; void of_platform_reset_gpio_probe(void){	int ret;	handle = of_get_named_gpio(of_find_node_by_path("/"),				   "hard-reset-gpios", 0); 	if (!gpio_is_valid(handle)) {		pr_info("Skipping unavailable RESET gpio %d (%s)\n",				handle, "reset");		return;	} 	ret = gpio_request(handle, "reset");	if (ret < 0) {		pr_info("GPIO pin is already allocated\n");		return;	} 	/* get current setup value */	reset_val = gpio_get_value(handle);	/* FIXME maybe worth to perform any action */	pr_debug("Reset: Gpio output state: 0x%x\n", reset_val); 	/* Setup GPIO as output */	ret = gpio_direction_output(handle, 0);	if (ret < 0)		goto err; 	/* Setup output direction */	gpio_set_value(handle, 0); 	pr_info("RESET: Registered gpio device: %d, current val: %d\n",							handle, reset_val);	return;err:	gpio_free(handle);	return;}  static void gpio_system_reset(void){	if (gpio_is_valid(handle))		gpio_set_value(handle, 1 - reset_val);	else		pr_notice("Reset GPIO unavailable - halting!\n");}#elsestatic void gpio_system_reset(void){	pr_notice("No reset GPIO present - halting!\n");} void of_platform_reset_gpio_probe(void){	return;}#endif void machine_restart(char *cmd){	pr_notice("Machine restart...\n");	gpio_system_reset();	while (1)		;} void machine_shutdown(void){	pr_notice("Machine shutdown...\n");	while (1)		;} void machine_halt(void){	pr_notice("Machine halt...\n");	while (1)		;} void machine_power_off(void){	pr_notice("Machine power off...\n");	while (1)		;}