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authorDmitry Baryshkov <dbaryshkov@gmail.com>2008-10-09 16:58:13 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-10-11 09:52:38 +0100
commit69fc7eed5f56bce15b239e5110de2575a6970df4 (patch)
treedef52983185ffcea4da23cb747f10ee39c1b3396
parent6defd90433729c2d795865165cb34d938d8ff07c (diff)
downloadop-kernel-dev-69fc7eed5f56bce15b239e5110de2575a6970df4.zip
op-kernel-dev-69fc7eed5f56bce15b239e5110de2575a6970df4.tar.gz
[ARM] 5300/1: fixup spitz reset during boot
Some machines don't have the pullup/down on their reset pin, so configuring the reset generating pin as input makes them reset immediately. Fix that by making reset pin direction configurable. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mach-pxa/include/mach/reset.h9
-rw-r--r--arch/arm/mach-pxa/reset.c9
-rw-r--r--arch/arm/mach-pxa/spitz.c2
-rw-r--r--arch/arm/mach-pxa/tosa.c2
4 files changed, 14 insertions, 8 deletions
diff --git a/arch/arm/mach-pxa/include/mach/reset.h b/arch/arm/mach-pxa/include/mach/reset.h
index 9489a48..7b8842c 100644
--- a/arch/arm/mach-pxa/include/mach/reset.h
+++ b/arch/arm/mach-pxa/include/mach/reset.h
@@ -10,9 +10,12 @@
extern unsigned int reset_status;
extern void clear_reset_status(unsigned int mask);
-/*
- * register GPIO as reset generator
+/**
+ * init_gpio_reset() - register GPIO as reset generator
+ *
+ * @gpio - gpio nr
+ * @output - set gpio as out/low instead of input during normal work
*/
-extern int init_gpio_reset(int gpio);
+extern int init_gpio_reset(int gpio, int output);
#endif /* __ASM_ARCH_RESET_H */
diff --git a/arch/arm/mach-pxa/reset.c b/arch/arm/mach-pxa/reset.c
index 31d7885..1b2af57 100644
--- a/arch/arm/mach-pxa/reset.c
+++ b/arch/arm/mach-pxa/reset.c
@@ -20,7 +20,7 @@ static void do_hw_reset(void);
static int reset_gpio = -1;
-int init_gpio_reset(int gpio)
+int init_gpio_reset(int gpio, int output)
{
int rc;
@@ -30,9 +30,12 @@ int init_gpio_reset(int gpio)
goto out;
}
- rc = gpio_direction_input(gpio);
+ if (output)
+ rc = gpio_direction_output(gpio, 0);
+ else
+ rc = gpio_direction_input(gpio);
if (rc) {
- printk(KERN_ERR "Can't configure reset_gpio for input\n");
+ printk(KERN_ERR "Can't configure reset_gpio\n");
gpio_free(gpio);
goto out;
}
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 9b4f24c..524f656 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -618,7 +618,7 @@ static void spitz_restart(char mode)
static void __init common_init(void)
{
- init_gpio_reset(SPITZ_GPIO_ON_RESET);
+ init_gpio_reset(SPITZ_GPIO_ON_RESET, 1);
pm_power_off = spitz_poweroff;
arm_pm_restart = spitz_restart;
diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
index 9f3ef9e..130e37e 100644
--- a/arch/arm/mach-pxa/tosa.c
+++ b/arch/arm/mach-pxa/tosa.c
@@ -781,7 +781,7 @@ static void __init tosa_init(void)
gpio_set_wake(MFP_PIN_GPIO1, 1);
/* We can't pass to gpio-keys since it will drop the Reset altfunc */
- init_gpio_reset(TOSA_GPIO_ON_RESET);
+ init_gpio_reset(TOSA_GPIO_ON_RESET, 0);
pm_power_off = tosa_poweroff;
arm_pm_restart = tosa_restart;
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