From: Richard Cochran <rcochran@xxxxxxxxxxxxx>
This is a straightforward conversion. We place this callback last
in the list so that the LED illuminates only after a successful
bring up sequence.
Signed-off-by: Richard Cochran <rcochran@xxxxxxxxxxxxx>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Richard Purdie <rpurdie@xxxxxxxxx>
Cc: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Cc: linux-leds@xxxxxxxxxxxxxxx
Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
---
drivers/leds/trigger/ledtrig-cpu.c | 32 +++++++++++++++-----------------
include/linux/cpuhotplug.h | 1 +
2 files changed, 16 insertions(+), 17 deletions(-)
--- a/drivers/leds/trigger/ledtrig-cpu.c
+++ b/drivers/leds/trigger/ledtrig-cpu.c
@@ -92,25 +92,17 @@ static struct syscore_ops ledtrig_cpu_sy
.resume = ledtrig_cpu_syscore_resume,
};
-static int ledtrig_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
+static int ledtrig_starting_cpu(unsigned int cpu)
{
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- ledtrig_cpu(CPU_LED_START);
- break;
- case CPU_DYING:
- ledtrig_cpu(CPU_LED_STOP);
- break;
- }
-
- return NOTIFY_OK;
+ ledtrig_cpu(CPU_LED_START);
+ return 0;
}
-
-static struct notifier_block ledtrig_cpu_nb = {
- .notifier_call = ledtrig_cpu_notify,
-};
+static int ledtrig_dying_cpu(unsigned int cpu)
+{
+ ledtrig_cpu(CPU_LED_STOP);
+ return 0;
+}
static int __init ledtrig_cpu_init(void)
{
@@ -133,7 +125,13 @@ static int __init ledtrig_cpu_init(void)
}
register_syscore_ops(&ledtrig_cpu_syscore_ops);
- register_cpu_notifier(&ledtrig_cpu_nb);
+
+ /*
+ * FIXME: Why needs this to happen in the interrupt disabled
+ * low level bringup phase of a cpu?
+ */
+ cpuhp_setup_state(CPUHP_AP_LEDTRIG_STARTING, "AP_LEDTRIG_STARTING",
+ ledtrig_starting_cpu, ledtrig_dying_cpu);
pr_info("ledtrig-cpu: registered to indicate activity on CPUs\n");
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -47,6 +47,7 @@ enum cpuhp_state {
CPUHP_AP_MARCO_TIMER_STARTING,
CPUHP_AP_MIPS_GIC_TIMER_STARTING,
CPUHP_AP_KVM_STARTING,
+ CPUHP_AP_LEDTRIG_STARTING,
CPUHP_AP_NOTIFY_STARTING,
CPUHP_AP_ONLINE,
CPUHP_TEARDOWN_CPU,
--
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