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ARM: integrator: move debug LEDs to syscon LED driver 

The Integrator debug block is a simple set of registers, make
it a syscon and register the four LEDs on the Integrator/AP
baseboard as syscon LEDs.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2014-10-15 17:33:13 +02:00
parent b437c52c29
commit 7e61006436
2 changed files with 38 additions and 46 deletions
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36
arch/arm/boot/dts/integrator.dtsi
View File

@ -82,5 +82,41 @@
reg = <0x19000000 0x1000>;
interrupts = <4>;
};
syscon {
/* Debug registers mapped as syscon */
compatible = "syscon";
reg = <0x1a000000 0x10>;
led@04.0 {
compatible = "register-bit-led";
offset = <0x04>;
mask = <0x01>;
label = "integrator:green0";
linux,default-trigger = "heartbeat";
default-state = "on";
};
led@04.1 {
compatible = "register-bit-led";
offset = <0x04>;
mask = <0x02>;
label = "integrator:yellow";
default-state = "off";
};
led@04.2 {
compatible = "register-bit-led";
offset = <0x04>;
mask = <0x04>;
label = "integrator:red";
default-state = "off";
};
led@04.3 {
compatible = "register-bit-led";
offset = <0x04>;
mask = <0x08>;
label = "integrator:green1";
default-state = "off";
};
};
};
};

48
arch/arm/mach-integrator/leds.c
View File

@ -16,12 +16,8 @@
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
#define ALPHA_REG __io_address(INTEGRATOR_DBG_BASE)
#define LEDREG (__io_address(INTEGRATOR_DBG_BASE) + INTEGRATOR_DBG_LEDS_OFFSET)
struct integrator_led {
struct led_classdev cdev;
u8 mask;
};
/*
@ -32,40 +28,9 @@ static const struct {
const char *name;
const char *trigger;
} integrator_leds[] = {
{ "integrator:green0", "heartbeat", },
{ "integrator:yellow", },
{ "integrator:red", },
{ "integrator:green1", },
{ "integrator:core_module", "cpu0", },
};
static void integrator_led_set(struct led_classdev *cdev,
enum led_brightness b)
{
struct integrator_led *led = container_of(cdev,
struct integrator_led, cdev);
u32 reg = __raw_readl(LEDREG);
if (b != LED_OFF)
reg |= led->mask;
else
reg &= ~led->mask;
while (__raw_readl(ALPHA_REG) & 1)
cpu_relax();
__raw_writel(reg, LEDREG);
}
static enum led_brightness integrator_led_get(struct led_classdev *cdev)
{
struct integrator_led *led = container_of(cdev,
struct integrator_led, cdev);
u32 reg = __raw_readl(LEDREG);
return (reg & led->mask) ? LED_FULL : LED_OFF;
}
static void cm_led_set(struct led_classdev *cdev,
enum led_brightness b)
{
@ -93,19 +58,10 @@ static int __init integrator_leds_init(void)
if (!led)
break;
led->cdev.name = integrator_leds[i].name;
if (i == 4) { /* Setting for LED in core module */
led->cdev.brightness_set = cm_led_set;
led->cdev.brightness_get = cm_led_get;
} else {
led->cdev.brightness_set = integrator_led_set;
led->cdev.brightness_get = integrator_led_get;
}
led->cdev.brightness_set = cm_led_set;
led->cdev.brightness_get = cm_led_get;
led->cdev.default_trigger = integrator_leds[i].trigger;
led->mask = BIT(i);
if (led_classdev_register(NULL, &led->cdev) < 0) {
kfree(led);