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Commit 67bf8766 authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Support both levels for reset 



Till this patch reset always perform writen to 1.
Now we can use negative logic and perform reset write to 0.

It is opposite level than is currently read from that pin

Signed-off-by: default avatarMichal Simek <monstr@monstr.eu>
parent 75375830

arch/microblaze/kernel/reset.c

+6 −4
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/of_gpio.h>



static int handle; /* reset pin handle */

static unsigned int reset_val;



static int of_reset_gpio_handle(void)

{
@@ -75,9 +76,9 @@ void of_platform_reset_gpio_probe(void) 
	}



	/* get current setup value */

	ret = gpio_get_value(handle);

	reset_val = gpio_get_value(handle);

	/* FIXME maybe worth to perform any action */

	pr_debug("Reset: Gpio output state: 0x%x\n", ret);

	pr_debug("Reset: Gpio output state: 0x%x\n", reset_val);



	/* Setup GPIO as output */

	ret = gpio_direction_output(handle, 0);
@@ -87,7 +88,8 @@ void of_platform_reset_gpio_probe(void) 
	/* Setup output direction */

	gpio_set_value(handle, 0);



	printk(KERN_INFO "RESET: Registered gpio device: %d\n", handle);

	printk(KERN_INFO "RESET: Registered gpio device: %d, current val: %d\n",

							handle, reset_val);

	return;

err:

	gpio_free(handle);
@@ -97,7 +99,7 @@ err: 


static void gpio_system_reset(void)

{

	gpio_set_value(handle, 1);

	gpio_set_value(handle, 1 - reset_val);

}

#else

#define gpio_system_reset() do {} while (0)