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| author | Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | 2010-05-18 16:15:32 +0300 |
|---|---|---|
| committer | Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | 2010-08-04 15:50:17 +0300 |
| commit | 6b23398591a51943dbf08f30cfc2475a895cb1b4 (patch) | |
| tree | ff2c318b9fa3ef8a90d0413a85976614fd822cd7 | |
| parent | b5bebe410204cf84337b54c372cceda2d6b27de6 (diff) | |
| download | linux-6b23398591a51943dbf08f30cfc2475a895cb1b4.tar.bz2 | |
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 <Hiroshi.DOYU@nokia.com>
| -rw-r--r-- | arch/arm/plat-omap/mailbox.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c index ec0e1596b4f3..87e0cde8d0db 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); |