Re: [PATCH v11 4/5] PCI: qcom: Add a flag in match data along with ops

[Prasad Malisetty <pmaliset@codeaurora.org>]

On 2021-10-06 00:51, Bjorn Helgaas wrote:
> On Wed, Oct 06, 2021 at 12:12:38AM +0530, Prasad Malisetty wrote:
>> Add pipe_clk_need_muxing flag in match data and configure
>> If the platform needs to switch pipe_clk_src.
>> 
>> Signed-off-by: Prasad Malisetty <pmaliset@codeaurora.org>
>> ---
>>  drivers/pci/controller/dwc/pcie-qcom.c | 70 
>> ++++++++++++++++++++++++++++------
>>  1 file changed, 59 insertions(+), 11 deletions(-)
>> 
>> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c 
>> b/drivers/pci/controller/dwc/pcie-qcom.c
>> index 8a7a300..1d7a9cb 100644
>> --- a/drivers/pci/controller/dwc/pcie-qcom.c
>> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
>> @@ -189,6 +189,11 @@ struct qcom_pcie_ops {
>>  	int (*config_sid)(struct qcom_pcie *pcie);
>>  };
>> 
>> +struct qcom_pcie_cfg {
>> +	const struct qcom_pcie_ops *ops;
>> +	unsigned int pipe_clk_need_muxing:1;
>> +};
> 
> Thanks for splitting this up; it's 90% of the way there.
> 
> It would be better if this patch added only the definition and use of
> qcom_pcie_cfg:
> 
>   +struct qcom_pcie_cfg {
>   +     const struct qcom_pcie_ops *ops;
>   +};
> 
> and then the subsequent patch added the clock muxing stuff:
> 
>    struct qcom_pcie_cfg {
>   +	unsigned int pipe_clk_need_muxing:1;
> 
>    struct qcom_pcie {
>   +	unsigned int pipe_clk_need_muxing:1;
> 
>    static const struct qcom_pcie_cfg sc7280_cfg = {
>   +	.pipe_clk_need_muxing = true,
> 
>   static int qcom_pcie_probe(struct platform_device *pdev)
>   +	pcie->pipe_clk_need_muxing = pcie_cfg->pipe_clk_need_muxing;
> 
> That way everything related to pipe_clk_need_muxing would be in a
> single patch.
> 
>>  struct qcom_pcie {
>>  	struct dw_pcie *pci;
>>  	void __iomem *parf;			/* DT parf */
>> @@ -197,6 +202,7 @@ struct qcom_pcie {
>>  	struct phy *phy;
>>  	struct gpio_desc *reset;
>>  	const struct qcom_pcie_ops *ops;
>> +	unsigned int pipe_clk_need_muxing:1;
>>  };
>> 
>>  #define to_qcom_pcie(x)		dev_get_drvdata((x)->dev)
>> @@ -1456,6 +1462,39 @@ static const struct qcom_pcie_ops ops_1_9_0 = {
>>  	.config_sid = qcom_pcie_config_sid_sm8250,
>>  };
>> 
Thanks Bjorn, Agree on it. I will incorporate the changes in next patch 
version.

-Prasad

>> +static const struct qcom_pcie_cfg apq8084_cfg = {
>> +	.ops = &ops_1_0_0,
>> +};
>> +
>> +static const struct qcom_pcie_cfg ipq8064_cfg = {
>> +	.ops = &ops_2_1_0,
>> +};
>> +
>> +static const struct qcom_pcie_cfg msm8996_cfg = {
>> +	.ops = &ops_2_3_2,
>> +};
>> +
>> +static const struct qcom_pcie_cfg ipq8074_cfg = {
>> +	.ops = &ops_2_3_3,
>> +};
>> +
>> +static const struct qcom_pcie_cfg ipq4019_cfg = {
>> +	.ops = &ops_2_4_0,
>> +};
>> +
>> +static const struct qcom_pcie_cfg sdm845_cfg = {
>> +	.ops = &ops_2_7_0,
>> +};
>> +
>> +static const struct qcom_pcie_cfg sm8250_cfg = {
>> +	.ops = &ops_1_9_0,
>> +};
>> +
>> +static const struct qcom_pcie_cfg sc7280_cfg = {
>> +	.ops = &ops_1_9_0,
>> +	.pipe_clk_need_muxing = true,
>> +};
>> +
>>  static const struct dw_pcie_ops dw_pcie_ops = {
>>  	.link_up = qcom_pcie_link_up,
>>  	.start_link = qcom_pcie_start_link,
>> @@ -1467,6 +1506,7 @@ static int qcom_pcie_probe(struct 
>> platform_device *pdev)
>>  	struct pcie_port *pp;
>>  	struct dw_pcie *pci;
>>  	struct qcom_pcie *pcie;
>> +	const struct qcom_pcie_cfg *pcie_cfg;
>>  	int ret;
>> 
>>  	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
>> @@ -1488,7 +1528,14 @@ static int qcom_pcie_probe(struct 
>> platform_device *pdev)
>> 
>>  	pcie->pci = pci;
>> 
>> -	pcie->ops = of_device_get_match_data(dev);
>> +	pcie_cfg = of_device_get_match_data(dev);
>> +	if (!pcie_cfg || !pcie_cfg->ops) {
>> +		dev_err(dev, "Invalid platform data\n");
>> +		return NULL;
>> +	}
>> +
>> +	pcie->ops = pcie_cfg->ops;
>> +	pcie->pipe_clk_need_muxing = pcie_cfg->pipe_clk_need_muxing;
>> 
>>  	pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
>>  	if (IS_ERR(pcie->reset)) {
>> @@ -1545,16 +1592,17 @@ static int qcom_pcie_probe(struct 
>> platform_device *pdev)
>>  }
>> 
>>  static const struct of_device_id qcom_pcie_match[] = {
>> -	{ .compatible = "qcom,pcie-apq8084", .data = &ops_1_0_0 },
>> -	{ .compatible = "qcom,pcie-ipq8064", .data = &ops_2_1_0 },
>> -	{ .compatible = "qcom,pcie-ipq8064-v2", .data = &ops_2_1_0 },
>> -	{ .compatible = "qcom,pcie-apq8064", .data = &ops_2_1_0 },
>> -	{ .compatible = "qcom,pcie-msm8996", .data = &ops_2_3_2 },
>> -	{ .compatible = "qcom,pcie-ipq8074", .data = &ops_2_3_3 },
>> -	{ .compatible = "qcom,pcie-ipq4019", .data = &ops_2_4_0 },
>> -	{ .compatible = "qcom,pcie-qcs404", .data = &ops_2_4_0 },
>> -	{ .compatible = "qcom,pcie-sdm845", .data = &ops_2_7_0 },
>> -	{ .compatible = "qcom,pcie-sm8250", .data = &ops_1_9_0 },
>> +	{ .compatible = "qcom,pcie-apq8084", .data = &apq8084_cfg },
>> +	{ .compatible = "qcom,pcie-ipq8064", .data = &ipq8064_cfg },
>> +	{ .compatible = "qcom,pcie-ipq8064-v2", .data = &ipq8064_cfg },
>> +	{ .compatible = "qcom,pcie-apq8064", .data = &ipq8064_cfg },
>> +	{ .compatible = "qcom,pcie-msm8996", .data = &msm8996_cfg },
>> +	{ .compatible = "qcom,pcie-ipq8074", .data = &ipq8074_cfg },
>> +	{ .compatible = "qcom,pcie-ipq4019", .data = &ipq4019_cfg },
>> +	{ .compatible = "qcom,pcie-qcs404", .data = &ipq4019_cfg },
>> +	{ .compatible = "qcom,pcie-sdm845", .data = &sdm845_cfg },
>> +	{ .compatible = "qcom,pcie-sm8250", .data = &sm8250_cfg },
>> +	{ .compatible = "qcom,pcie-sc7280", .data = &sc7280_cfg },
>>  	{ }
>>  };
>> 
>> --
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>> Forum,
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>>