From 67bf87665466c4ea93e2c54d66dfd4cdac011a4b Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 29 Oct 2009 10:12:59 +0100 Subject: [PATCH] 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: Michal Simek --- arch/microblaze/kernel/reset.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/microblaze/kernel/reset.c b/arch/microblaze/kernel/reset.c index 789af930d72c..a1721a33042e 100644 --- a/arch/microblaze/kernel/reset.c +++ b/arch/microblaze/kernel/reset.c @@ -17,6 +17,7 @@ #include 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) -- 2.20.1