mailbox: qcom: Create APCS child device for clock controller

There is a clock controller functionality provided by the APCS hardware
block of msm8916 devices. The device-tree would represent an APCS node
with both mailbox and clock provider properties.
Create a platform child device for the clock controller functionality so
the driver can probe and use APCS as parent.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
index ab344bc6fa63..57bde0dfd12f 100644
--- a/drivers/mailbox/qcom-apcs-ipc-mailbox.c
+++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
@@ -29,6 +29,7 @@ struct qcom_apcs_ipc {
 
         struct regmap *regmap;
         unsigned long offset;
+        struct platform_device *clk;
 };
 
 static const struct regmap_config apcs_regmap_config = {
@@ -96,6 +97,14 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
                 return ret;
         }
 
+        if (of_device_is_compatible(np, "qcom,msm8916-apcs-kpss-global")) {
+                apcs->clk = platform_device_register_data(&pdev->dev,
+                                                          "qcom-apcs-msm8916-clk",
+                                                          -1, NULL, 0);
+                if (IS_ERR(apcs->clk))
+                        dev_err(&pdev->dev, "failed to register APCS clk\n");
+        }
+
         platform_set_drvdata(pdev, apcs);
 
         return 0;
@@ -104,8 +113,10 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
 static int qcom_apcs_ipc_remove(struct platform_device *pdev)
 {
         struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);
+        struct platform_device *clk = apcs->clk;
 
         mbox_controller_unregister(&apcs->mbox);
+        platform_device_unregister(clk);
 
         return 0;
 }