ARM: mach-realview and mach-versatile: retire custom LED code

This replaces the custom LED trigger code in mach-realview with
some overarching platform code for the plat-versatile family that
will lock down LEDs 2 thru 5 for CPU activity indication. The
day we have 8 core ARM systems the plat-versatile code will have
to become more elaborate.

Tested on RealView PB11MPCore by invoking four different CPU
hogs (yes > /dev/null&) and see the LEDs go on one at a time.
They all go off as the hogs are killed. Tested on the PB1176
as well - just one activity led (led 2) goes on and off with
CPU activity.

(bryan.wu@canonical.com: use ledtrig-cpu instead of ledtrig-arm-cpu)

Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>

arch/arm/mach-realview/core.c

@@ -35,7 +35,6 @@
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
-#include <asm/leds.h>
 #include <asm/mach-types.h>
 #include <asm/hardware/arm_timer.h>
 #include <asm/hardware/icst.h>
@@ -436,44 +435,6 @@ struct clcd_board clcd_plat_data = {
 	.remove		= versatile_clcd_remove_dma,
 };
 
-#ifdef CONFIG_LEDS
-#define VA_LEDS_BASE (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LED_OFFSET)
-
-void realview_leds_event(led_event_t ledevt)
-{
-	unsigned long flags;
-	u32 val;
-	u32 led = 1 << smp_processor_id();
-
-	local_irq_save(flags);
-	val = readl(VA_LEDS_BASE);
-
-	switch (ledevt) {
-	case led_idle_start:
-		val = val & ~led;
-		break;
-
-	case led_idle_end:
-		val = val | led;
-		break;
-
-	case led_timer:
-		val = val ^ REALVIEW_SYS_LED7;
-		break;
-
-	case led_halted:
-		val = 0;
-		break;
-
-	default:
-		break;
-	}
-
-	writel(val, VA_LEDS_BASE);
-	local_irq_restore(flags);
-}
-#endif	/* CONFIG_LEDS */
-
 /*
  * Where is the timer (VA)?
  */

arch/arm/mach-realview/core.h

@@ -26,7 +26,6 @@
 #include <linux/io.h>
 
 #include <asm/setup.h>
-#include <asm/leds.h>
 
 #define APB_DEVICE(name, busid, base, plat)			\
 static AMBA_APB_DEVICE(name, busid, 0, REALVIEW_##base##_BASE, base##_IRQ, plat)
@@ -47,7 +46,6 @@ extern void __iomem *timer1_va_base;
 extern void __iomem *timer2_va_base;
 extern void __iomem *timer3_va_base;
 
-extern void realview_leds_event(led_event_t ledevt);
 extern void realview_timer_init(unsigned int timer_irq);
 extern int realview_flash_register(struct resource *res, u32 num);
 extern int realview_eth_register(const char *name, struct resource *res);

arch/arm/mach-realview/realview_eb.c

@@ -30,7 +30,6 @@
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
-#include <asm/leds.h>
 #include <asm/mach-types.h>
 #include <asm/pmu.h>
 #include <asm/pgtable.h>
@@ -462,10 +461,6 @@ static void __init realview_eb_init(void)
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
 	}
-
-#ifdef CONFIG_LEDS
-	leds_event = realview_leds_event;
-#endif
 }
 
 MACHINE_START(REALVIEW_EB, "ARM-RealView EB")

arch/arm/mach-realview/realview_pb1176.c

@@ -32,7 +32,6 @@
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
-#include <asm/leds.h>
 #include <asm/mach-types.h>
 #include <asm/pmu.h>
 #include <asm/pgtable.h>
@@ -375,10 +374,6 @@ static void __init realview_pb1176_init(void)
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
 	}
-
-#ifdef CONFIG_LEDS
-	leds_event = realview_leds_event;
-#endif
 }
 
 MACHINE_START(REALVIEW_PB1176, "ARM-RealView PB1176")

arch/arm/mach-realview/realview_pb11mp.c

@@ -30,7 +30,6 @@
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
-#include <asm/leds.h>
 #include <asm/mach-types.h>
 #include <asm/pmu.h>
 #include <asm/pgtable.h>
@@ -357,10 +356,6 @@ static void __init realview_pb11mp_init(void)
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
 	}
-
-#ifdef CONFIG_LEDS
-	leds_event = realview_leds_event;
-#endif
 }
 
 MACHINE_START(REALVIEW_PB11MP, "ARM-RealView PB11MPCore")

arch/arm/mach-realview/realview_pba8.c

@@ -29,7 +29,6 @@
 #include <linux/io.h>
 
 #include <asm/irq.h>
-#include <asm/leds.h>
 #include <asm/mach-types.h>
 #include <asm/pmu.h>
 #include <asm/pgtable.h>
@@ -299,10 +298,6 @@ static void __init realview_pba8_init(void)
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
 	}
-
-#ifdef CONFIG_LEDS
-	leds_event = realview_leds_event;
-#endif
 }
 
 MACHINE_START(REALVIEW_PBA8, "ARM-RealView PB-A8")

arch/arm/mach-realview/realview_pbx.c

@@ -28,7 +28,6 @@
 #include <linux/io.h>
 
 #include <asm/irq.h>
-#include <asm/leds.h>
 #include <asm/mach-types.h>
 #include <asm/pmu.h>
 #include <asm/smp_twd.h>
@@ -394,10 +393,6 @@ static void __init realview_pbx_init(void)
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
 	}
-
-#ifdef CONFIG_LEDS
-	leds_event = realview_leds_event;
-#endif
 }
 
 MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")

arch/arm/mach-versatile/core.c

@@ -37,7 +37,6 @@
 #include <linux/mtd/physmap.h>
 
 #include <asm/irq.h>
-#include <asm/leds.h>
 #include <asm/hardware/arm_timer.h>
 #include <asm/hardware/icst.h>
 #include <asm/hardware/vic.h>
@@ -763,10 +762,6 @@ void __init versatile_init(void)
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
 	}
-
-#ifdef CONFIG_LEDS
-	leds_event = versatile_leds_event;
-#endif
 }
 
 /*

arch/arm/plat-versatile/Kconfig

@@ -13,8 +13,10 @@ config PLAT_VERSATILE_FPGA_IRQ_NR
        depends on PLAT_VERSATILE_FPGA_IRQ
 
 config PLAT_VERSATILE_LEDS
-	def_bool y if LEDS_CLASS
+	def_bool y if NEW_LEDS
 	depends on ARCH_REALVIEW || ARCH_VERSATILE
+	select LEDS_CLASS
+	select LEDS_TRIGGER
 
 config PLAT_VERSATILE_SCHED_CLOCK
 	def_bool y

arch/arm/plat-versatile/leds.c

@@ -37,10 +37,10 @@ static const struct {
 } versatile_leds[] = {
 	{ "versatile:0", "heartbeat", },
 	{ "versatile:1", "mmc0", },
-	{ "versatile:2", },
-	{ "versatile:3", },
-	{ "versatile:4", },
-	{ "versatile:5", },
+	{ "versatile:2", "cpu0" },
+	{ "versatile:3", "cpu1" },
+	{ "versatile:4", "cpu2" },
+	{ "versatile:5", "cpu3" },
 	{ "versatile:6", },
 	{ "versatile:7", },
 };