forked from Minki/linux
43024ed6fa
Cleanup the LEDs code to use ioremap()/writeb() to access the register. This allows us to move the definitions out of a header file directly into the ebsa285 support code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
124 lines
2.5 KiB
C
124 lines
2.5 KiB
C
/*
|
|
* linux/arch/arm/mach-footbridge/ebsa285.c
|
|
*
|
|
* EBSA285 machine fixup
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/leds.h>
|
|
|
|
#include <asm/hardware/dec21285.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
|
|
#include "common.h"
|
|
|
|
/* LEDs */
|
|
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
|
|
#define XBUS_AMBER_L BIT(0)
|
|
#define XBUS_GREEN_L BIT(1)
|
|
#define XBUS_RED_L BIT(2)
|
|
#define XBUS_TOGGLE BIT(7)
|
|
|
|
struct ebsa285_led {
|
|
struct led_classdev cdev;
|
|
u8 mask;
|
|
};
|
|
|
|
/*
|
|
* The triggers lines up below will only be used if the
|
|
* LED triggers are compiled in.
|
|
*/
|
|
static const struct {
|
|
const char *name;
|
|
const char *trigger;
|
|
} ebsa285_leds[] = {
|
|
{ "ebsa285:amber", "cpu0", },
|
|
{ "ebsa285:green", "heartbeat", },
|
|
{ "ebsa285:red",},
|
|
};
|
|
|
|
static unsigned char hw_led_state;
|
|
static void __iomem *xbus;
|
|
|
|
static void ebsa285_led_set(struct led_classdev *cdev,
|
|
enum led_brightness b)
|
|
{
|
|
struct ebsa285_led *led = container_of(cdev,
|
|
struct ebsa285_led, cdev);
|
|
|
|
if (b == LED_OFF)
|
|
hw_led_state |= led->mask;
|
|
else
|
|
hw_led_state &= ~led->mask;
|
|
writeb(hw_led_state, xbus);
|
|
}
|
|
|
|
static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
|
|
{
|
|
struct ebsa285_led *led = container_of(cdev,
|
|
struct ebsa285_led, cdev);
|
|
|
|
return hw_led_state & led->mask ? LED_OFF : LED_FULL;
|
|
}
|
|
|
|
static int __init ebsa285_leds_init(void)
|
|
{
|
|
int i;
|
|
|
|
if (!machine_is_ebsa285())
|
|
return -ENODEV;
|
|
|
|
xbus = ioremap(XBUS_CS2, SZ_4K);
|
|
if (!xbus)
|
|
return -ENOMEM;
|
|
|
|
/* 3 LEDS all off */
|
|
hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L;
|
|
writeb(hw_led_state, xbus);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
|
|
struct ebsa285_led *led;
|
|
|
|
led = kzalloc(sizeof(*led), GFP_KERNEL);
|
|
if (!led)
|
|
break;
|
|
|
|
led->cdev.name = ebsa285_leds[i].name;
|
|
led->cdev.brightness_set = ebsa285_led_set;
|
|
led->cdev.brightness_get = ebsa285_led_get;
|
|
led->cdev.default_trigger = ebsa285_leds[i].trigger;
|
|
led->mask = BIT(i);
|
|
|
|
if (led_classdev_register(NULL, &led->cdev) < 0) {
|
|
kfree(led);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Since we may have triggers on any subsystem, defer registration
|
|
* until after subsystem_init.
|
|
*/
|
|
fs_initcall(ebsa285_leds_init);
|
|
#endif
|
|
|
|
MACHINE_START(EBSA285, "EBSA285")
|
|
/* Maintainer: Russell King */
|
|
.atag_offset = 0x100,
|
|
.video_start = 0x000a0000,
|
|
.video_end = 0x000bffff,
|
|
.map_io = footbridge_map_io,
|
|
.init_early = footbridge_sched_clock,
|
|
.init_irq = footbridge_init_irq,
|
|
.init_time = footbridge_timer_init,
|
|
.restart = footbridge_restart,
|
|
MACHINE_END
|
|
|