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

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Message-ID: <20240417070616.GB3894@thinkpad>
Date: Wed, 17 Apr 2024 12:36:16 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: mr.nuke.me@...il.com
Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	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>, 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 Mon, Apr 15, 2024 at 03:07:02PM -0500, mr.nuke.me@...il.com wrote:
> 
> 
> 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.
> 

Please rebase on top of [1] and mention the dependency in cover letter.

- Mani

[1] https://lore.kernel.org/linux-pci/20240417-pci-qcom-clk-bulk-v1-1-52ca19b3d6b2@linaro.org/

> 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
> > > 
> > > 
> > 
> > 

-- 
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