From 8fe833c1b010489b71b082e553b1dfa80ef81061 Mon Sep 17 00:00:00 2001
From: Richard Purdie <rpurdie@rpsys.net>
Date: Fri, 31 Mar 2006 02:31:14 -0800
Subject: [PATCH] [PATCH] LED: add NAND MTD activity LED trigger
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
drivers/mtd/nand/nand_base.c | 26 +++++++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 5d222460b42a..95e96fa1fceb 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -80,6 +80,7 @@
#include <linux/mtd/compatmac.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
+#include <linux/leds.h>
#include <asm/io.h>
#ifdef CONFIG_MTD_PARTITIONS
@@ -515,6 +516,8 @@ static int nand_block_checkbad (struct mtd_info *mtd, loff_t ofs, int getchip, i
return nand_isbad_bbt (mtd, ofs, allowbbt);
}
+DEFINE_LED_TRIGGER(nand_led_trigger);
+
/*
* Wait for the ready pin, after a command
* The timeout is catched later.
@@ -524,12 +527,14 @@ static void nand_wait_ready(struct mtd_info *mtd)
struct nand_chip *this = mtd->priv;
unsigned long timeo = jiffies + 2;
+ led_trigger_event(nand_led_trigger, LED_FULL);
/* wait until command is processed or timeout occures */
do {
if (this->dev_ready(mtd))
- return;
+ break;
touch_softlockup_watchdog();
} while (time_before(jiffies, timeo));
+ led_trigger_event(nand_led_trigger, LED_OFF);
}
/**
@@ -817,6 +822,8 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
else
timeo += (HZ * 20) / 1000;
+ led_trigger_event(nand_led_trigger, LED_FULL);
+
/* Apply this short delay always to ensure that we do wait tWB in
* any case on any machine. */
ndelay (100);
@@ -840,6 +847,8 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
}
cond_resched();
}
+ led_trigger_event(nand_led_trigger, LED_OFF);
+
status = (int) this->read_byte(mtd);
return status;
}
@@ -2724,6 +2733,21 @@ void nand_release (struct mtd_info *mtd)
EXPORT_SYMBOL_GPL (nand_scan);
EXPORT_SYMBOL_GPL (nand_release);
+
+static int __init nand_base_init(void)
+{
+ led_trigger_register_simple("nand-disk", &nand_led_trigger);
+ return 0;
+}
+
+static void __exit nand_base_exit(void)
+{
+ led_trigger_unregister_simple(nand_led_trigger);
+}
+
+module_init(nand_base_init);
+module_exit(nand_base_exit);
+
MODULE_LICENSE ("GPL");
MODULE_AUTHOR ("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>");
MODULE_DESCRIPTION ("Generic NAND flash driver code");