mailbox: qcom-apcs-ipc: Assign OF node to clock controller child device

Currently, the child device for the clock controller inside the APCS block
is created without any OF node assigned, so the drivers need to rely on the
parent device for obtaining any resources.

Add support for defining the clock controller inside a "clock-controller"
subnode to break up circular dependencies between the mailbox and required
parent clocks of the clock controller. For backwards compatibility, if the
subnode is not defined, reuse the OF node from the parent device.

Signed-off-by: Stephan Gerhold <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>

1 files changed, 12 insertions, 4 deletions

diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
index 11c41e935a36..8b24ec0fa191 100644
--- a/drivers/mailbox/qcom-apcs-ipc-mailbox.c
+++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
@@ -116,10 +116,18 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
 	}
 
 	if (apcs_data->clk_name) {
-		apcs->clk = platform_device_register_data(&pdev->dev,
-							  apcs_data->clk_name,
-							  PLATFORM_DEVID_AUTO,
-							  NULL, 0);
+		struct device_node *np = of_get_child_by_name(pdev->dev.of_node,
+							      "clock-controller");
+		struct platform_device_info pdevinfo = {
+			.parent = &pdev->dev,
+			.name = apcs_data->clk_name,
+			.id = PLATFORM_DEVID_AUTO,
+			.fwnode = of_fwnode_handle(np) ?: pdev->dev.fwnode,
+			.of_node_reused = !np,
+		};
+
+		apcs->clk = platform_device_register_full(&pdevinfo);
+		of_node_put(np);
 		if (IS_ERR(apcs->clk))
 			dev_err(&pdev->dev, "failed to register APCS clk\n");
 	}