Re: [PATCH v4 2/5] soc: qcom: smd-rpm: Create RPM interconnect proxy child device

Brian Masney
2019-10-07T02:01:55Z

On Thu, Jun 13, 2019 at 06:13:20PM +0300, Georgi Djakov wrote:
> 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>

Reviewed-by: Brian Masney <masneyb@onstation.org>
Tested-by: Brian Masney <masneyb@onstation.org> # msm8974

I think this patch may have fell through the cracks since I don't see
it in linux-next. The qcs404 patches in this series were merged.

Brian

> ---
>
> v4:
> - Return error if platform_device_register_data() fails
> - Remove platform_set_drvdata() on the child device.
>
> 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 fa9dd12b5e39..34cdd638a6c1 100644
> --- a/drivers/soc/qcom/smd-rpm.c
> +++ b/drivers/soc/qcom/smd-rpm.c
> @@ -19,12 +19,14 @@
> /**
> * 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;
> @@ -193,6 +195,7 @@ 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)
> @@ -205,11 +208,23 @@ 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))
> + return PTR_ERR(rpm->icc);
> +
> + 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);
> }
>