The mailbox framework currently does not support using the
channel phandles directly in the mbox property of client nodes,
and also expects a minimum value of 1 for the #mbox-cells in the
mailbox controller device node. Implement a custom of_xlate function
for the OMAP mailbox driver that allows phandles for the pargs
specifier instead of indexing to avoid any channel registration
order dependencies.
Cc: Jassi Brar <jassisinghbrar@xxxxxxxxx>
Signed-off-by: Suman Anna <s-anna@xxxxxx>
---
drivers/mailbox/omap-mailbox.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c
index d71e84f..4847466 100644
--- a/drivers/mailbox/omap-mailbox.c
+++ b/drivers/mailbox/omap-mailbox.c
@@ -676,6 +676,28 @@ static const struct of_device_id omap_mailbox_of_match[] = {
};
MODULE_DEVICE_TABLE(of, omap_mailbox_of_match);
+static struct mbox_chan *omap_mbox_of_xlate(struct mbox_controller *controller,
+ const struct of_phandle_args *sp)
+{
+ phandle phandle = sp->args[0];
+ struct device_node *node;
+ struct omap_mbox_device *mdev;
+ struct omap_mbox *mbox;
+
+ node = of_find_node_by_phandle(phandle);
+ if (!node) {
+ pr_err("could not find node phandle 0x%x\n", phandle);
+ return NULL;
+ }
+
+ mdev = container_of(controller, struct omap_mbox_device, controller);
+ if (WARN_ON(!mdev))
+ return NULL;
+
+ mbox = omap_mbox_device_find(mdev, node->name);
+ return mbox ? mbox->chan : NULL;
+}
+
static int omap_mbox_probe(struct platform_device *pdev)
{
struct resource *mem;
@@ -835,6 +857,7 @@ static int omap_mbox_probe(struct platform_device *pdev)
mdev->controller.ops = &omap_mbox_chan_ops;
mdev->controller.chans = chnls;
mdev->controller.num_chans = info_count;
+ mdev->controller.of_xlate = omap_mbox_of_xlate;
ret = omap_mbox_register(mdev);
if (ret)
return ret;
--
2.0.0
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