ARM: use new LEDS CPU trigger stub to replace old one

Cc:  Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>

6 files changed, 3 insertions, 245 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a91009c61870..dc57d3792359 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1739,59 +1739,6 @@ config FORCE_MAX_ZONEORDER
           This config option is actually maximum order plus one. For example,
           a value of 11 means that the largest free memory block is 2^10 pages.
 
-config LEDS
-        bool "Timer and CPU usage LEDs"
-        depends on ARCH_CDB89712 || ARCH_EBSA110 || \
-                   ARCH_EBSA285 || ARCH_INTEGRATOR || \
-                   ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
-                   ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
-                   ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
-                   ARCH_AT91 || ARCH_DAVINCI || \
-                   ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
-        help
-          If you say Y here, the LEDs on your machine will be used
-          to provide useful information about your current system status.
-
-          If you are compiling a kernel for a NetWinder or EBSA-285, you will
-          be able to select which LEDs are active using the options below. If
-          you are compiling a kernel for the EBSA-110 or the LART however, the
-          red LED will simply flash regularly to indicate that the system is
-          still functional. It is safe to say Y here if you have a CATS
-          system, but the driver will do nothing.
-
-config LEDS_TIMER
-        bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
-                            OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
-                            || MACH_OMAP_PERSEUS2
-        depends on LEDS
-        depends on !GENERIC_CLOCKEVENTS
-        default y if ARCH_EBSA110
-        help
-          If you say Y here, one of the system LEDs (the green one on the
-          NetWinder, the amber one on the EBSA285, or the red one on the LART)
-          will flash regularly to indicate that the system is still
-          operational. This is mainly useful to kernel hackers who are
-          debugging unstable kernels.
-
-          The LART uses the same LED for both Timer LED and CPU usage LED
-          functions. You may choose to use both, but the Timer LED function
-          will overrule the CPU usage LED.
-
-config LEDS_CPU
-        bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
-                        !ARCH_OMAP) \
-                        || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
-                        || MACH_OMAP_PERSEUS2
-        depends on LEDS
-        help
-          If you say Y here, the red LED will be used to give a good real
-          time indication of CPU usage, by lighting whenever the idle task
-          is not currently executing.
-
-          The LART uses the same LED for both Timer LED and CPU usage LED
-          functions. You may choose to use both, but the Timer LED function
-          will overrule the CPU usage LED.
-
 config ALIGNMENT_TRAP
         bool
         depends on CPU_CP15_MMU
diff --git a/arch/arm/include/asm/leds.h b/arch/arm/include/asm/leds.h
deleted file mode 100644
index c545739f39b7..000000000000
--- a/arch/arm/include/asm/leds.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- *  arch/arm/include/asm/leds.h
- *
- *  Copyright (C) 1998 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- *  Event-driven interface for LEDs on machines
- *  Added led_start and led_stop- Alex Holden, 28th Dec 1998.
- */
-#ifndef ASM_ARM_LEDS_H
-#define ASM_ARM_LEDS_H
-
-
-typedef enum {
-        led_idle_start,
-        led_idle_end,
-        led_timer,
-        led_start,
-        led_stop,
-        led_claim,              /* override idle & timer leds */
-        led_release,            /* restore idle & timer leds */
-        led_start_timer_mode,
-        led_stop_timer_mode,
-        led_green_on,
-        led_green_off,
-        led_amber_on,
-        led_amber_off,
-        led_red_on,
-        led_red_off,
-        led_blue_on,
-        led_blue_off,
-        /*
-         * I want this between led_timer and led_start, but
-         * someone has decided to export this to user space
-         */
-        led_halted
-} led_event_t;
-
-/* Use this routine to handle LEDs */
-
-#ifdef CONFIG_LEDS
-extern void (*leds_event)(led_event_t);
-#else
-#define leds_event(e)
-#endif
-
-#endif
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 7ad2d5cf7008..8951577c4ced 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -21,7 +21,6 @@ obj-y		:= elf.o entry-armv.o entry-common.o irq.o opcodes.o \
 
 obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += compat.o
 
-obj-$(CONFIG_LEDS)              += leds.o
 obj-$(CONFIG_OC_ETM)            += etm.o
 obj-$(CONFIG_CPU_IDLE)          += cpuidle.o
 obj-$(CONFIG_ISA_DMA_API)       += dma.o
diff --git a/arch/arm/kernel/leds.c b/arch/arm/kernel/leds.c
deleted file mode 100644
index 1911dae19e4f..000000000000
--- a/arch/arm/kernel/leds.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * LED support code, ripped out of arch/arm/kernel/time.c
- *
- *  Copyright (C) 1994-2001 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/export.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/syscore_ops.h>
-#include <linux/string.h>
-
-#include <asm/leds.h>
-
-static void dummy_leds_event(led_event_t evt)
-{
-}
-
-void (*leds_event)(led_event_t) = dummy_leds_event;
-
-struct leds_evt_name {
-        const char      name[8];
-        int             on;
-        int             off;
-};
-
-static const struct leds_evt_name evt_names[] = {
-        { "amber", led_amber_on, led_amber_off },
-        { "blue",  led_blue_on,  led_blue_off  },
-        { "green", led_green_on, led_green_off },
-        { "red",   led_red_on,   led_red_off   },
-};
-
-static ssize_t leds_store(struct device *dev,
-                        struct device_attribute *attr,
-                        const char *buf, size_t size)
-{
-        int ret = -EINVAL, len = strcspn(buf, " ");
-
-        if (len > 0 && buf[len] == '\0')
-                len--;
-
-        if (strncmp(buf, "claim", len) == 0) {
-                leds_event(led_claim);
-                ret = size;
-        } else if (strncmp(buf, "release", len) == 0) {
-                leds_event(led_release);
-                ret = size;
-        } else {
-                int i;
-
-                for (i = 0; i < ARRAY_SIZE(evt_names); i++) {
-                        if (strlen(evt_names[i].name) != len ||
-                            strncmp(buf, evt_names[i].name, len) != 0)
-                                continue;
-                        if (strncmp(buf+len, " on", 3) == 0) {
-                                leds_event(evt_names[i].on);
-                                ret = size;
-                        } else if (strncmp(buf+len, " off", 4) == 0) {
-                                leds_event(evt_names[i].off);
-                                ret = size;
-                        }
-                        break;
-                }
-        }
-        return ret;
-}
-
-static DEVICE_ATTR(event, 0200, NULL, leds_store);
-
-static struct bus_type leds_subsys = {
-        .name           = "leds",
-        .dev_name       = "leds",
-};
-
-static struct device leds_device = {
-        .id             = 0,
-        .bus            = &leds_subsys,
-};
-
-static int leds_suspend(void)
-{
-        leds_event(led_stop);
-        return 0;
-}
-
-static void leds_resume(void)
-{
-        leds_event(led_start);
-}
-
-static void leds_shutdown(void)
-{
-        leds_event(led_halted);
-}
-
-static struct syscore_ops leds_syscore_ops = {
-        .shutdown       = leds_shutdown,
-        .suspend        = leds_suspend,
-        .resume         = leds_resume,
-};
-
-static int __init leds_init(void)
-{
-        int ret;
-        ret = subsys_system_register(&leds_subsys, NULL);
-        if (ret == 0)
-                ret = device_register(&leds_device);
-        if (ret == 0)
-                ret = device_create_file(&leds_device, &dev_attr_event);
-        if (ret == 0)
-                register_syscore_ops(&leds_syscore_ops);
-        return ret;
-}
-
-device_initcall(leds_init);
-
-EXPORT_SYMBOL(leds_event);
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 19c95ea65b2f..864580af1678 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -31,9 +31,9 @@
 #include <linux/random.h>
 #include <linux/hw_breakpoint.h>
 #include <linux/cpuidle.h>
+#include <linux/leds.h>
 
 #include <asm/cacheflush.h>
-#include <asm/leds.h>
 #include <asm/processor.h>
 #include <asm/thread_notify.h>
 #include <asm/stacktrace.h>
@@ -189,7 +189,7 @@ void cpu_idle(void)
         while (1) {
                 tick_nohz_idle_enter();
                 rcu_idle_enter();
-                leds_event(led_idle_start);
+                ledtrig_cpu(CPU_LED_IDLE_START);
                 while (!need_resched()) {
 #ifdef CONFIG_HOTPLUG_CPU
                         if (cpu_is_offline(smp_processor_id()))
@@ -220,7 +220,7 @@ void cpu_idle(void)
                         } else
                                 local_irq_enable();
                 }
-                leds_event(led_idle_end);
+                ledtrig_cpu(CPU_LED_IDLE_END);
                 rcu_idle_exit();
                 tick_nohz_idle_exit();
                 schedule_preempt_disabled();
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index af2afb019672..09be0c3c9069 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -25,7 +25,6 @@
 #include <linux/timer.h>
 #include <linux/irq.h>
 
-#include <asm/leds.h>
 #include <asm/thread_info.h>
 #include <asm/sched_clock.h>
 #include <asm/stacktrace.h>
@@ -80,21 +79,6 @@ u32 arch_gettimeoffset(void)
 }
 #endif /* CONFIG_ARCH_USES_GETTIMEOFFSET */
 
-#ifdef CONFIG_LEDS_TIMER
-static inline void do_leds(void)
-{
-        static unsigned int count = HZ/2;
-
-        if (--count == 0) {
-                count = HZ/2;
-                leds_event(led_timer);
-        }
-}
-#else
-#define do_leds()
-#endif
-
-
 #ifndef CONFIG_GENERIC_CLOCKEVENTS
 /*
  * Kernel system timer support.
@@ -102,7 +86,6 @@ static inline void do_leds(void)
 void timer_tick(void)
 {
         profile_tick(CPU_PROFILING);
-        do_leds();
         xtime_update(1);
 #ifndef CONFIG_SMP
         update_process_times(user_mode(get_irq_regs()));