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xtensa: register gpio chip before use

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Platform initialization sets up the LED heartbeat that is controlled
via GPIO.  Requesting the GPIO pins fails, however, as the chip is
only initialized later by a device_initcall().

Fix this up by exporting the initialization function.  Let the
platform set up the chip before it starts using it.

Signed-off-by: Johannes Weiner <jw@emlix.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Johannes Weiner 2009-05-11 15:43:34 +02:00 committed by Chris Zankel
parent 586411dcd1
commit 1fb137c1e3
3 changed files with 10 additions and 2 deletions
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3
arch/xtensa/platforms/s6105/setup.c
View File

@ -10,6 +10,8 @@
#include <asm/bootparam.h>
#include <variant/hardware.h>
#include <variant/gpio.h>
#include <platform/gpio.h>
void platform_halt(void)
@ -47,6 +49,7 @@ void __init platform_setup(char **cmdline)
void __init platform_init(bp_tag_t *first)
{
s6_gpio_init();
gpio_request(GPIO_LED1_NGREEN, "led1_green");
gpio_request(GPIO_LED1_RED, "led1_red");
gpio_direction_output(GPIO_LED1_NGREEN, 1);

3
arch/xtensa/variants/s6000/gpio.c
View File

@ -64,8 +64,7 @@ static struct gpio_chip gpiochip = {
.exported = 0, /* no exporting to userspace */
};
static int gpio_init(void)
int s6_gpio_init(void)
{
return gpiochip_add(&gpiochip);
}
device_initcall(gpio_init);

6
arch/xtensa/variants/s6000/include/variant/gpio.h Normal file
View File

@ -0,0 +1,6 @@
#ifndef _XTENSA_VARIANT_S6000_GPIO_H
#define _XTENSA_VARIANT_S6000_GPIO_H
extern int s6_gpio_init(void);
#endif /* _XTENSA_VARIANT_S6000_GPIO_H */