linux-kernel - [PATCH v2] PCI: qcom: Add async probe support

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Date:   Mon, 20 Mar 2023 12:16:44 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     lpieralisi@...nel.org, kw@...ux.com
Cc:     robh@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        johan+linaro@...nel.org, steev@...i.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v2] PCI: qcom: Add async probe support

Qcom PCIe RC driver waits for the PHY link to be up during the probe. This
consumes several milliseconds during boot. So add async probe support so
that other drivers can load in parallel while this driver waits for the
link to be up.

Suggested-by: Rob Herring <robh@...nel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---

Changes in v2:

* Rebased on top of v6.3-rc1

 drivers/pci/controller/dwc/pcie-qcom.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index a232b04af048..4ca357be88e0 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1862,6 +1862,7 @@ static struct platform_driver qcom_pcie_driver = {
 		.name = "qcom-pcie",
 		.suppress_bind_attrs = true,
 		.of_match_table = qcom_pcie_match,
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 };
 builtin_platform_driver(qcom_pcie_driver);
-- 
2.25.1