2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/delay.h>
9 #include <linux/gpio.h>
11 #include <asm/proc-fns.h>
13 #include <mach/pxa-regs.h>
14 #include <mach/reset.h>
16 unsigned int reset_status
;
17 EXPORT_SYMBOL(reset_status
);
19 static void do_hw_reset(void);
21 static int reset_gpio
= -1;
23 int init_gpio_reset(int gpio
)
27 rc
= gpio_request(gpio
, "reset generator");
29 printk(KERN_ERR
"Can't request reset_gpio\n");
33 rc
= gpio_direction_input(gpio
);
35 printk(KERN_ERR
"Can't configure reset_gpio for input\n");
49 * This covers various types of logic connecting gpio pin
50 * to RESET pins (nRESET or GPIO_RESET):
52 static void do_gpio_reset(void)
54 BUG_ON(reset_gpio
== -1);
57 gpio_direction_output(reset_gpio
, 0);
59 /* rising edge or drive high */
60 gpio_set_value(reset_gpio
, 1);
63 gpio_set_value(reset_gpio
, 0);
65 /* give it some time */
73 static void do_hw_reset(void)
75 /* Initialize the watchdog and let it fire */
78 OSMR3
= OSCR
+ 368640; /* ... in 100 ms */
81 void arch_reset(char mode
)
83 clear_reset_status(RESET_STATUS_ALL
);
87 /* Jump into ROM at address 0 */
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