From mboxrd@z Thu Jan 1 00:00:00 1970 From: Suman Anna Subject: [PATCH 6/6] mailbox/omap: add a custom of_xlate function Date: Tue, 24 Jun 2014 20:47:58 -0500 Message-ID: <1403660878-56350-7-git-send-email-s-anna@ti.com> References: <1403660878-56350-1-git-send-email-s-anna@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1403660878-56350-1-git-send-email-s-anna@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Tony Lindgren Cc: Jassi Brar , Dave Gerlach , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Suman Anna , Jassi Brar List-Id: devicetree@vger.kernel.org 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 Signed-off-by: Suman Anna --- 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