[PATCH v3 3/5] soc: qcom: smd-rpm: Create RPM interconnect proxy child device

Georgi Djakov
2019-06-11T16:42:14Z

Register a platform device to handle the communication of bus bandwidth
requests with the remote processor. The interconnect proxy device is part
of this remote processor (RPM) hardware. Let's create a icc-smd-rpm proxy
child device to represent the bus throughput functionality that is provided
by the RPM.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---

v3:
- New patch.

drivers/soc/qcom/smd-rpm.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c
index 9956bb2c63f2..a028250737ec 100644
--- a/drivers/soc/qcom/smd-rpm.c
+++ b/drivers/soc/qcom/smd-rpm.c
@@ -27,12 +27,14 @@
/**
* struct qcom_smd_rpm - state of the rpm device driver
* @rpm_channel: reference to the smd channel
+ * @icc: interconnect proxy device
* @ack: completion for acks
* @lock: mutual exclusion around the send/complete pair
* @ack_status: result of the rpm request
*/
struct qcom_smd_rpm {
struct rpmsg_endpoint *rpm_channel;
+ struct platform_device *icc;
struct device *dev;

struct completion ack;
@@ -201,6 +203,7 @@ static int qcom_smd_rpm_callback(struct rpmsg_device *rpdev,
static int qcom_smd_rpm_probe(struct rpmsg_device *rpdev)
{
struct qcom_smd_rpm *rpm;
+ int ret;

rpm = devm_kzalloc(&rpdev->dev, sizeof(*rpm), GFP_KERNEL);
if (!rpm)
@@ -213,11 +216,23 @@ static int qcom_smd_rpm_probe(struct rpmsg_device *rpdev)
rpm->rpm_channel = rpdev->ept;
dev_set_drvdata(&rpdev->dev, rpm);

- return of_platform_populate(rpdev->dev.of_node, NULL, NULL, &rpdev->dev);
+ rpm->icc = platform_device_register_data(&rpdev->dev, "icc_smd_rpm", -1,
+ NULL, 0);
+ if (!IS_ERR(rpm->icc))
+ platform_set_drvdata(rpm->icc, rpm);
+
+ ret = of_platform_populate(rpdev->dev.of_node, NULL, NULL, &rpdev->dev);
+ if (ret)
+ platform_device_unregister(rpm->icc);
+
+ return ret;
}

static void qcom_smd_rpm_remove(struct rpmsg_device *rpdev)
{
+ struct qcom_smd_rpm *rpm = dev_get_drvdata(&rpdev->dev);
+
+ platform_device_unregister(rpm->icc);
of_platform_depopulate(&rpdev->dev);
}