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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-04-05 07:40:58 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-05-26 16:45:43 +0100
commit15bce40cb3133bcc07d548013df97e4653d363c1 (patch)
treeff37c3c3ee573d2d2d0e16d69b34055928dc1bcc
parentd694846b6b1c92bcc946b6ffb0a5ea25d5df1014 (diff)
[MTD] Restore suspend/resume support for mtd devices
This is intended to suspend/resume the _chip_, while we leave board drivers to handle their own suspend/resume for the controller. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
-rw-r--r--drivers/mtd/mtdcore.c47
1 files changed, 37 insertions, 10 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index bccb4b1ffc4..fac54a3fa3f 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -23,8 +23,15 @@
#include "mtdcore.h"
-
-static struct class *mtd_class;
+static int mtd_cls_suspend(struct device *dev, pm_message_t state);
+static int mtd_cls_resume(struct device *dev);
+
+static struct class mtd_class = {
+ .name = "mtd",
+ .owner = THIS_MODULE,
+ .suspend = mtd_cls_suspend,
+ .resume = mtd_cls_resume,
+};
/* These are exported solely for the purpose of mtd_blkdevs.c. You
should not use them for _anything_ else */
@@ -52,7 +59,26 @@ static void mtd_release(struct device *dev)
/* remove /dev/mtdXro node if needed */
if (index)
- device_destroy(mtd_class, index + 1);
+ device_destroy(&mtd_class, index + 1);
+}
+
+static int mtd_cls_suspend(struct device *dev, pm_message_t state)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ if (mtd->suspend)
+ return mtd->suspend(mtd);
+ else
+ return 0;
+}
+
+static int mtd_cls_resume(struct device *dev)
+{
+ struct mtd_info *mtd = dev_to_mtd(dev);
+
+ if (mtd->resume)
+ mtd->resume(mtd);
+ return 0;
}
static ssize_t mtd_type_show(struct device *dev,
@@ -269,7 +295,7 @@ int add_mtd_device(struct mtd_info *mtd)
* physical device.
*/
mtd->dev.type = &mtd_devtype;
- mtd->dev.class = mtd_class;
+ mtd->dev.class = &mtd_class;
mtd->dev.devt = MTD_DEVT(i);
dev_set_name(&mtd->dev, "mtd%d", i);
if (device_register(&mtd->dev) != 0) {
@@ -278,7 +304,7 @@ int add_mtd_device(struct mtd_info *mtd)
}
if (MTD_DEVT(i))
- device_create(mtd_class, mtd->dev.parent,
+ device_create(&mtd_class, mtd->dev.parent,
MTD_DEVT(i) + 1,
NULL, "mtd%dro", i);
@@ -604,11 +630,12 @@ done:
static int __init init_mtd(void)
{
- mtd_class = class_create(THIS_MODULE, "mtd");
+ int ret;
+ ret = class_register(&mtd_class);
- if (IS_ERR(mtd_class)) {
- pr_err("Error creating mtd class.\n");
- return PTR_ERR(mtd_class);
+ if (ret) {
+ pr_err("Error registering mtd class: %d\n", ret);
+ return ret;
}
#ifdef CONFIG_PROC_FS
if ((proc_mtd = create_proc_entry( "mtd", 0, NULL )))
@@ -623,7 +650,7 @@ static void __exit cleanup_mtd(void)
if (proc_mtd)
remove_proc_entry( "mtd", NULL);
#endif /* CONFIG_PROC_FS */
- class_destroy(mtd_class);
+ class_unregister(&mtd_class);
}
module_init(init_mtd);