From a33d700e8eea76c62120cb3dbf5e01328f18319a Mon Sep 17 00:00:00 2001 From: Manivannan Sadhasivam Date: Mon, 19 Jun 2023 20:34:00 +0530 Subject: [PATCH] PCI: qcom: Disable write access to read only registers for IP v2.3.3 In the post init sequence of v2.9.0, write access to read only registers are not disabled after updating the registers. Fix it by disabling the access after register update. Link: https://lore.kernel.org/r/20230619150408.8468-2-manivannan.sadhasivam@linaro.org Fixes: 5d76117f070d ("PCI: qcom: Add support for IPQ8074 PCIe controller") Signed-off-by: Manivannan Sadhasivam Signed-off-by: Lorenzo Pieralisi Cc: --- drivers/pci/controller/dwc/pcie-qcom.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 4ab30892f6efb..ef385d36d653e 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -836,6 +836,8 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie) writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset + PCI_EXP_DEVCTL2); + dw_pcie_dbi_ro_wr_dis(pci); + return 0; } -- 2.30.2