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yaml --- r: 201468 b: refs/heads/master c: b541701 h: refs/heads/master v: v3
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Linus Walleij
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Russell King
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Jul 26, 2010
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--- | ||
refs/heads/master: ce8962455e902ffa08d59fd2b113942eaaffb0d6 | ||
refs/heads/master: b5417019a6e614f5285f9eb8f9e5b2d62395965b |
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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 |
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/* | ||
* 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> | ||
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#include <mach/hardware.h> | ||
#include <mach/platform.h> | ||
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#ifdef VERSATILE_SYS_BASE | ||
#define LEDREG (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LED_OFFSET) | ||
#endif | ||
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#ifdef REALVIEW_SYS_BASE | ||
#define LEDREG (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LED_OFFSET) | ||
#endif | ||
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struct versatile_led { | ||
struct led_classdev cdev; | ||
u8 mask; | ||
}; | ||
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/* | ||
* 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", }, | ||
}; | ||
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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); | ||
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if (b != LED_OFF) | ||
reg |= led->mask; | ||
else | ||
reg &= ~led->mask; | ||
writel(reg, LEDREG); | ||
} | ||
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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); | ||
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return (reg & led->mask) ? LED_FULL : LED_OFF; | ||
} | ||
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static int __init versatile_leds_init(void) | ||
{ | ||
int i; | ||
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/* All ON */ | ||
writel(0xff, LEDREG); | ||
for (i = 0; i < ARRAY_SIZE(versatile_leds); i++) { | ||
struct versatile_led *led; | ||
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led = kzalloc(sizeof(*led), GFP_KERNEL); | ||
if (!led) | ||
break; | ||
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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); | ||
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if (led_classdev_register(NULL, &led->cdev) < 0) { | ||
kfree(led); | ||
break; | ||
} | ||
} | ||
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return 0; | ||
} | ||
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/* | ||
* Since we may have triggers on any subsystem, defer registration | ||
* until after subsystem_init. | ||
*/ | ||
fs_initcall(versatile_leds_init); |