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// SPDX-License-Identifier: GPL-2.0
/*
* 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
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