From af8350c756cb48a738474738f7bf8c0e572fa057 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <drzeus@drzeus.cx>
Date: Mon, 24 Sep 2007 07:15:48 +0200
Subject: [PATCH] mmc: add led trigger
Add a led trigger for each host controller that indicates if there
is a request active on the controller.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
---
drivers/mmc/core/core.c | 5 +++++
drivers/mmc/core/host.c | 5 +++++
include/linux/mmc/host.h | 6 ++++++
3 files changed, 16 insertions(+)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index bad39442f8fe6..09435e0ec6806 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -18,6 +18,7 @@
#include <linux/delay.h>
#include <linux/pagemap.h>
#include <linux/err.h>
+#include <linux/leds.h>
#include <asm/scatterlist.h>
#include <linux/scatterlist.h>
@@ -92,6 +93,8 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
cmd->error = 0;
host->ops->request(host, mrq);
} else {
+ led_trigger_event(host->led, LED_OFF);
+
pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n",
mmc_hostname(host), cmd->opcode, err,
cmd->resp[0], cmd->resp[1],
@@ -146,6 +149,8 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
WARN_ON(!host->claimed);
+ led_trigger_event(host->led, LED_FULL);
+
mrq->cmd->error = 0;
mrq->cmd->mrq = mrq;
if (mrq->data) {
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 37b761891d675..64fbc9759a307 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -15,6 +15,7 @@
#include <linux/err.h>
#include <linux/idr.h>
#include <linux/pagemap.h>
+#include <linux/leds.h>
#include <linux/mmc/host.h>
@@ -115,6 +116,8 @@ int mmc_add_host(struct mmc_host *host)
snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
"mmc%d", host->index);
+ led_trigger_register_simple(host->class_dev.bus_id, &host->led);
+
err = device_add(&host->class_dev);
if (err)
return err;
@@ -140,6 +143,8 @@ void mmc_remove_host(struct mmc_host *host)
device_del(&host->class_dev);
+ led_trigger_unregister(host->led);
+
spin_lock(&mmc_host_lock);
idr_remove(&mmc_host_idr, host->index);
spin_unlock(&mmc_host_lock);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 76eef94782f8a..125eee1407ff1 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -10,6 +10,8 @@
#ifndef LINUX_MMC_HOST_H
#define LINUX_MMC_HOST_H
+#include <linux/leds.h>
+
#include <linux/mmc/core.h>
struct mmc_ios {
@@ -133,6 +135,10 @@ struct mmc_host {
struct task_struct *sdio_irq_thread;
atomic_t sdio_irq_thread_abort;
+#ifdef CONFIG_LEDS_TRIGGERS
+ struct led_trigger *led; /* activity led */
+#endif
+
unsigned long private[0] ____cacheline_aligned;
};
--
2.30.2