Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history
yaml
---
r: 201468
b: refs/heads/master
c: b541701
h: refs/heads/master
v: v3
  • Loading branch information
Linus Walleij authored and Russell King committed Jul 26, 2010
1 parent 3feceb8 commit 11c0e42
Show file tree
Hide file tree
Showing 3 changed files with 109 additions and 3 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: ce8962455e902ffa08d59fd2b113942eaaffb0d6
refs/heads/master: b5417019a6e614f5285f9eb8f9e5b2d62395965b
7 changes: 5 additions & 2 deletions trunk/arch/arm/plat-versatile/Makefile
Original file line number Diff line number Diff line change
@@ -1,4 +1,7 @@
obj-y := clock.o
obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
obj-$(CONFIG_ARCH_REALVIEW) += sched-clock.o
obj-$(CONFIG_ARCH_VERSATILE) += sched-clock.o
# For all but the Integrator, compile these
ifeq ($(CONFIG_ARCH_INTEGRATOR),)
obj-y += sched-clock.o
obj-$(CONFIG_LEDS_CLASS) += leds.o
endif
103 changes: 103 additions & 0 deletions trunk/arch/arm/plat-versatile/leds.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,103 @@
/*
* Driver for the 8 user LEDs found on the RealViews and Versatiles
* Based on DaVinci's DM365 board code
*
* License terms: GNU General Public License (GPL) version 2
* Author: Linus Walleij <triad@df.lth.se>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/leds.h>

#include <mach/hardware.h>
#include <mach/platform.h>

#ifdef VERSATILE_SYS_BASE
#define LEDREG (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LED_OFFSET)
#endif

#ifdef REALVIEW_SYS_BASE
#define LEDREG (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LED_OFFSET)
#endif

struct versatile_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;
} versatile_leds[] = {
{ "versatile:0", "heartbeat", },
{ "versatile:1", "mmc0", },
{ "versatile:2", },
{ "versatile:3", },
{ "versatile:4", },
{ "versatile:5", },
{ "versatile:6", },
{ "versatile:7", },
};

static void versatile_led_set(struct led_classdev *cdev,
enum led_brightness b)
{
struct versatile_led *led = container_of(cdev,
struct versatile_led, cdev);
u32 reg = readl(LEDREG);

if (b != LED_OFF)
reg |= led->mask;
else
reg &= ~led->mask;
writel(reg, LEDREG);
}

static enum led_brightness versatile_led_get(struct led_classdev *cdev)
{
struct versatile_led *led = container_of(cdev,
struct versatile_led, cdev);
u32 reg = readl(LEDREG);

return (reg & led->mask) ? LED_FULL : LED_OFF;
}

static int __init versatile_leds_init(void)
{
int i;

/* All ON */
writel(0xff, LEDREG);
for (i = 0; i < ARRAY_SIZE(versatile_leds); i++) {
struct versatile_led *led;

led = kzalloc(sizeof(*led), GFP_KERNEL);
if (!led)
break;

led->cdev.name = versatile_leds[i].name;
led->cdev.brightness_set = versatile_led_set;
led->cdev.brightness_get = versatile_led_get;
led->cdev.default_trigger = versatile_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(versatile_leds_init);

0 comments on commit 11c0e42

Please sign in to comment.