linux-kernel - Re: [PATCH v2 2/2] mailbox: qcom: Add MSM8939 APCS support

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Message-ID: <20210523060009.GA29015@dragon>
Date:   Sun, 23 May 2021 14:00:10 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     Jassi Brar <jassisinghbrar@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Sivaprakash Murugesan <sivaprak@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Benjamin Li <benl@...areup.com>, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] mailbox: qcom: Add MSM8939 APCS support

On Mon, May 03, 2021 at 04:13:34PM +0800, Shawn Guo wrote:
> MSM8939 has 3 APCS instances for Cluster0 (little cores), Cluster1 (big
> cores) and CCI (Cache Coherent Interconnect).  Although only APCS of
> Cluster0 and Cluster1 have IPC bits, each of 3 APCS has A53PLL clock
> control bits.  That said, we need to register 3 'qcom-apcs-msm8916-clk'
> devices to instantiate all 3 clocks.  Let's use PLATFORM_DEVID_AUTO
> rather than PLATFORM_DEVID_NONE for platform_device_register_data()
> call.  Otherwise, the second A53PLL clock registration will fail due
> to duplicate device name.
> 
> [    0.519657] sysfs: cannot create duplicate filename '/bus/platform/devices/qcom-apcs-msm8916-clk'
> ...
> [    0.661158] qcom_apcs_ipc b111000.mailbox: failed to register APCS clk
> 
> Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Hi Jassi,

Any comment on this patch?

Shawn

> ---
>  drivers/mailbox/qcom-apcs-ipc-mailbox.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> index f25324d03842..1699ec38bc3b 100644
> --- a/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> +++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> @@ -132,7 +132,7 @@ 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_NONE,
> +							  PLATFORM_DEVID_AUTO,
>  							  NULL, 0);
>  		if (IS_ERR(apcs->clk))
>  			dev_err(&pdev->dev, "failed to register APCS clk\n");
> @@ -158,6 +158,7 @@ static const struct of_device_id qcom_apcs_ipc_of_match[] = {
>  	{ .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },
>  	{ .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq8074_apcs_data },
>  	{ .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },
> +	{ .compatible = "qcom,msm8939-apcs-kpss-global", .data = &msm8916_apcs_data },
>  	{ .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },
>  	{ .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },
>  	{ .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8998_apcs_data },
> -- 
> 2.17.1
>