linux-kernel - [PATCH 2/3] ledtrig-ide-disk: use generic one-shot blink api

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Date:	Sun, 27 May 2012 01:19:23 +0200
From:	Fabio Baltieri <fabio.baltieri@...il.com>
To:	Bryan Wu <bryan.wu@...onical.com>
Cc:	linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
	Richard Purdie <rpurdie@...ys.net>,
	Fabio Baltieri <fabio.baltieri@...il.com>
Subject: [PATCH 2/3] ledtrig-ide-disk: use generic one-shot blink api

Convert ledtrig-ide-disk code to use the generic API for one-shot LED
blinking.

This patch changes slightly the behaviour of the trigger, as while the
original version kept the LED on under heavy activity, the new one keeps
a constant on-off blink at 1 / (2 * BLINK_DELAY) Hz.

Signed-off-by: Fabio Baltieri <fabio.baltieri@...il.com>
Cc: Bryan Wu <bryan.wu@...onical.com>
---
 drivers/leds/ledtrig-ide-disk.c | 23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

diff --git a/drivers/leds/ledtrig-ide-disk.c b/drivers/leds/ledtrig-ide-disk.c
index ec099fc..0ff16fb 100644
--- a/drivers/leds/ledtrig-ide-disk.c
+++ b/drivers/leds/ledtrig-ide-disk.c
@@ -18,33 +18,18 @@
 #include <linux/timer.h>
 #include <linux/leds.h>
 
-static void ledtrig_ide_timerfunc(unsigned long data);
+#define BLINK_DELAY 30
 
 DEFINE_LED_TRIGGER(ledtrig_ide);
-static DEFINE_TIMER(ledtrig_ide_timer, ledtrig_ide_timerfunc, 0, 0);
-static int ide_activity;
-static int ide_lastactivity;
+static unsigned long ide_blink_delay = BLINK_DELAY;
 
 void ledtrig_ide_activity(void)
 {
-	ide_activity++;
-	if (!timer_pending(&ledtrig_ide_timer))
-		mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10));
+	led_trigger_blink_oneshot(ledtrig_ide,
+				  &ide_blink_delay, &ide_blink_delay, 0);
 }
 EXPORT_SYMBOL(ledtrig_ide_activity);
 
-static void ledtrig_ide_timerfunc(unsigned long data)
-{
-	if (ide_lastactivity != ide_activity) {
-		ide_lastactivity = ide_activity;
-		/* INT_MAX will set each LED to its maximum brightness */
-		led_trigger_event(ledtrig_ide, INT_MAX);
-		mod_timer(&ledtrig_ide_timer, jiffies + msecs_to_jiffies(10));
-	} else {
-		led_trigger_event(ledtrig_ide, LED_OFF);
-	}
-}
-
 static int __init ledtrig_ide_init(void)
 {
 	led_trigger_register_simple("ide-disk", &ledtrig_ide);
-- 
1.7.10.2.520.g6a4a482.dirty

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