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SubjectRe: [PATCH 3/4] mailbox: qcom: Add ipq6018 apcs compatible
On Wed 27 May 05:38 PDT 2020, Sivaprakash Murugesan wrote:

> The Qualcomm ipq6018 has apcs block, add compatible for the same.
> Also, the apcs provides a clock controller functionality similar
> to msm8916 but the clock driver is different.
>
> Create a child platform device based on the apcs compatible for the
> clock controller functionality.
>
> Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
> ---
> drivers/mailbox/qcom-apcs-ipc-mailbox.c | 23 ++++++++++++++---------
> 1 file changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> index eeebafd..db3f9518 100644
> --- a/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> +++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> @@ -45,6 +45,13 @@ static const struct mbox_chan_ops qcom_apcs_ipc_ops = {
> .send_data = qcom_apcs_ipc_send_data,
> };
>
> +static const struct of_device_id apcs_clk_match_table[] = {
> + { .compatible = "qcom,ipq6018-apcs-apps-global", .data = "qcom,apss-ipq6018-clk", },
> + { .compatible = "qcom,msm8916-apcs-kpss-global", .data = "qcom-apcs-msm8916-clk", },
> + { .compatible = "qcom,qcs404-apcs-apps-global", .data = "qcom-apcs-msm8916-clk", },
> + {}
> +};
> +
> static int qcom_apcs_ipc_probe(struct platform_device *pdev)
> {
> struct qcom_apcs_ipc *apcs;
> @@ -54,11 +61,7 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
> void __iomem *base;
> unsigned long i;
> int ret;
> - const struct of_device_id apcs_clk_match_table[] = {
> - { .compatible = "qcom,msm8916-apcs-kpss-global", },
> - { .compatible = "qcom,qcs404-apcs-apps-global", },
> - {}
> - };
> + const struct of_device_id *clk_device;
>
> apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
> if (!apcs)
> @@ -93,11 +96,12 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
> return ret;
> }
>
> - if (of_match_device(apcs_clk_match_table, &pdev->dev)) {
> + clk_device = of_match_device(apcs_clk_match_table, &pdev->dev);

I think you should replace the direct integer in qcom_apcs_ipc_of_match
with a small struct containing offset and the clock device's name -
allowing the latter to be omitted.

That avoids the apcs_clk_match_table being unreferenced when this is
compiled without CONFIG_OF and it removes the need for two of_device_id
arrays.

Regards,
Bjorn

> + if (clk_device) {
> apcs->clk = platform_device_register_data(&pdev->dev,
> - "qcom-apcs-msm8916-clk",
> - PLATFORM_DEVID_NONE,
> - NULL, 0);
> + clk_device->data,
> + PLATFORM_DEVID_NONE,
> + NULL, 0);
> if (IS_ERR(apcs->clk))
> dev_err(&pdev->dev, "failed to register APCS clk\n");
> }
> @@ -126,6 +130,7 @@ static const struct of_device_id qcom_apcs_ipc_of_match[] = {
> { .compatible = "qcom,sc7180-apss-shared", .data = (void *)12 },
> { .compatible = "qcom,sdm845-apss-shared", .data = (void *)12 },
> { .compatible = "qcom,sm8150-apss-shared", .data = (void *)12 },
> + { .compatible = "qcom,ipq6018-apcs-apps-global", .data = (void *)8 },
> { .compatible = "qcom,ipq8074-apcs-apps-global", .data = (void *)8 },
> {}
> };
> --
> 2.7.4
>

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