linux-kernel - Re: [PATCH V4 7/8] mailbox: qcom: Add ipq6018 apcs compatible

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Date:   Sun, 24 May 2020 15:15:47 +0530
From:   Sivaprakash Murugesan <sivaprak@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     agross@...nel.org, mturquette@...libre.com, sboyd@...nel.org,
        robh+dt@...nel.org, jassisinghbrar@...il.com,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 7/8] mailbox: qcom: Add ipq6018 apcs compatible

Hi Bjorn,

On 5/13/2020 1:49 AM, Bjorn Andersson wrote:
> On Sun 03 May 23:20 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@...eaurora.org>
>> ---
>>   drivers/mailbox/qcom-apcs-ipc-mailbox.c | 26 +++++++++++++++++---------
>>   1 file changed, 17 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
>> index eeebafd..7c0c4b0 100644
>> --- a/drivers/mailbox/qcom-apcs-ipc-mailbox.c
>> +++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
>> @@ -45,6 +45,16 @@ 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,msm8916-apcs-kpss-global",
>> +	  .data = "qcom-apcs-msm8916-clk", },
> These are easier to read if you ignore the 80-char limit.
> Unless Jassi's object that is.
since Jassi has not objected your comment, I am making the change as per 
your suggestion.
>
>> +	{ .compatible = "qcom,qcs404-apcs-apps-global",
>> +	  .data = "qcom-apcs-msm8916-clk", },
>> +	{ .compatible = "qcom,ipq6018-apcs-apps-global",
> Add your entry on top, to maintain sort order.
ok.
>
>> +	  .data = "qcom,apss-ipq-clk", },
>> +	{}
>> +};
>> +
>>   static int qcom_apcs_ipc_probe(struct platform_device *pdev)
>>   {
>>   	struct qcom_apcs_ipc *apcs;
>> @@ -54,11 +64,7 @@ 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 +99,12 @@ 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);
> Better use of_device_match_data() and get the string directly (or NULL).

As I checked there is no API called of_device_match_data(), the API 
of_device_get_match_data()

returns the data associated with the device and it cannot be used here.

please correct me if wrong.

>
>> +	if (clk_device) {
>>   		apcs->clk = platform_device_register_data(&pdev->dev,
>> -							  "qcom-apcs-msm8916-clk",
>> -							  PLATFORM_DEVID_NONE,
>> -							  NULL, 0);
>> +						(const char *)clk_device->data,
>> +						PLATFORM_DEVID_NONE,
>> +						NULL, 0);
> I didn't apply the patch to look for myself, but please ensure to
> maintain indentation to follow the parenthesis on the line before.
ok.
>
>>   		if (IS_ERR(apcs->clk))
>>   			dev_err(&pdev->dev, "failed to register APCS clk\n");
>>   	}
>> @@ -127,6 +134,7 @@ static const struct of_device_id qcom_apcs_ipc_of_match[] = {
>>   	{ .compatible = "qcom,sdm845-apss-shared", .data = (void *)12 },
>>   	{ .compatible = "qcom,sm8150-apss-shared", .data = (void *)12 },
>>   	{ .compatible = "qcom,ipq8074-apcs-apps-global", .data = (void *)8 },
>> +	{ .compatible = "qcom,ipq6018-apcs-apps-global", .data = (void *)8 },
> Add it one line up and you'll maintain partial sorting...
ok.