linux-kernel - Re: [PATCH v3 4/7] PCI: qcom: Add support for IPQ9574

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Date: Mon, 15 Apr 2024 15:07:02 -0500
From: mr.nuke.me@...il.com
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kw@...ux.com>,
 Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Manivannan Sadhasivam
 <manivannan.sadhasivam@...aro.org>, linux-arm-msm@...r.kernel.org,
 linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
 linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 4/7] PCI: qcom: Add support for IPQ9574



On 4/15/24 15:04, Dmitry Baryshkov wrote:
> On Mon, 15 Apr 2024 at 21:22, Alexandru Gagniuc <mr.nuke.me@...il.com> wrote:
>>
>> Add support for the PCIe on IPQ9574. The main difference from ipq6018
>> is that the "iface" clock is not necessarry. Add a special case in
>> qcom_pcie_get_resources_2_9_0() to handle this.
>>
>> Signed-off-by: Alexandru Gagniuc <mr.nuke.me@...il.com>
>> ---
>>   drivers/pci/controller/dwc/pcie-qcom.c | 13 +++++++++----
>>   1 file changed, 9 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
>> index 14772edcf0d3..10560d6d6336 100644
>> --- a/drivers/pci/controller/dwc/pcie-qcom.c
>> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
>> @@ -1101,15 +1101,19 @@ static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie)
>>          struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
>>          struct dw_pcie *pci = pcie->pci;
>>          struct device *dev = pci->dev;
>> -       int ret;
>> +       int ret, num_clks = ARRAY_SIZE(res->clks) - 1;
>>
>> -       res->clks[0].id = "iface";
>> +       res->clks[0].id = "rchng";
>>          res->clks[1].id = "axi_m";
>>          res->clks[2].id = "axi_s";
>>          res->clks[3].id = "axi_bridge";
>> -       res->clks[4].id = "rchng";
>>
>> -       ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
>> +       if (!of_device_is_compatible(dev->of_node, "qcom,pcie-ipq9574")) {
>> +               res->clks[4].id = "iface";
>> +               num_clks++;
>> +       }
>> +
>> +       ret = devm_clk_bulk_get(dev, num_clks, res->clks);
> 
> Just use devm_clk_bulk_get_optional() here.

Thank you! I wasn't sure if this was the correct solution here. I will 
get this updated in v4.

Alex

>>          if (ret < 0)
>>                  return ret;
>>
>> @@ -1664,6 +1668,7 @@ static const struct of_device_id qcom_pcie_match[] = {
>>          { .compatible = "qcom,pcie-ipq8064-v2", .data = &cfg_2_1_0 },
>>          { .compatible = "qcom,pcie-ipq8074", .data = &cfg_2_3_3 },
>>          { .compatible = "qcom,pcie-ipq8074-gen3", .data = &cfg_2_9_0 },
>> +       { .compatible = "qcom,pcie-ipq9574", .data = &cfg_2_9_0 },
>>          { .compatible = "qcom,pcie-msm8996", .data = &cfg_2_3_2 },
>>          { .compatible = "qcom,pcie-qcs404", .data = &cfg_2_4_0 },
>>          { .compatible = "qcom,pcie-sa8540p", .data = &cfg_sc8280xp },
>> --
>> 2.40.1
>>
>>
> 
>