From 6b23398591a51943dbf08f30cfc2475a895cb1b4 Mon Sep 17 00:00:00 2001 From: Hiroshi DOYU Date: Tue, 18 May 2010 16:15:32 +0300 Subject: omap mailbox: Set a device in logical mbox instance for traceability With this patch, you'll get the following sysfs directories. This structure implies that a single platform device, "omap2-mailbox" holds multiple logical mbox instances. This could be the base to add sysfs files for each logical mboxes. Then userland application can access a mbox through sysfs entries if necessary(ex: setting kfifo size dynamically) ~# tree -d -L 2 /sys/devices/platform/omap2-mailbox/ /sys/devices/platform/omap2-mailbox/ |-- driver -> ../../../bus/platform/drivers/omap2-mailbox |-- mbox | |-- dsp <- they are each instances of logical mailbox. | |-- ducati | |-- iva2 | |-- mbox01 | |-- mbox02 | |-- mbox03 | |-- ..... | `-- tesla |-- power `-- subsystem -> ../../../bus/platform This was wrongly dropped by: commit c7c158e57bce6220644f2bcd65d82e1468aa40ec Signed-off-by: Hiroshi DOYU --- arch/arm/plat-omap/mailbox.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'arch/arm/plat-omap') diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c index ec0e1596b4f..87e0cde8d0d 100644 --- a/arch/arm/plat-omap/mailbox.c +++ b/arch/arm/plat-omap/mailbox.c @@ -347,6 +347,8 @@ void omap_mbox_put(struct omap_mbox *mbox) } EXPORT_SYMBOL(omap_mbox_put); +static struct class omap_mbox_class = { .name = "mbox", }; + int omap_mbox_register(struct device *parent, struct omap_mbox *mbox) { int ret = 0; @@ -357,6 +359,11 @@ int omap_mbox_register(struct device *parent, struct omap_mbox *mbox) if (mbox->next) return -EBUSY; + mbox->dev = device_create(&omap_mbox_class, + parent, 0, mbox, "%s", mbox->name); + if (IS_ERR(mbox->dev)) + return PTR_ERR(mbox->dev); + spin_lock(&mboxes_lock); tmp = find_mboxes(mbox->name); if (*tmp) { @@ -385,6 +392,7 @@ int omap_mbox_unregister(struct omap_mbox *mbox) *tmp = mbox->next; mbox->next = NULL; spin_unlock(&mboxes_lock); + device_unregister(mbox->dev); return 0; } tmp = &(*tmp)->next; @@ -397,6 +405,12 @@ EXPORT_SYMBOL(omap_mbox_unregister); static int __init omap_mbox_init(void) { + int err; + + err = class_register(&omap_mbox_class); + if (err) + return err; + mboxd = create_workqueue("mboxd"); if (!mboxd) return -ENOMEM; @@ -407,11 +421,12 @@ static int __init omap_mbox_init(void) return 0; } -module_init(omap_mbox_init); +subsys_initcall(omap_mbox_init); static void __exit omap_mbox_exit(void) { destroy_workqueue(mboxd); + class_unregister(&omap_mbox_class); } module_exit(omap_mbox_exit); -- cgit v1.2.3-18-g5258