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PCI: dwc: Prepare the driver for enabling ECAM mechanism using iATU 'CFG Shift Feature'

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In order to enable PCIe ECAM mechanism in DWC driver as per the 'CFG Shift
Feature' documented in Designware databook r5.20a, sec 3.10.10.3, prepare
the driver to handle the one time iATU setup and creating ECAM window.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
[mani: splitted the preparatory code into a separate commit for bisectability]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20250923-controller-dwc-ecam-v10-2-e84390ba75fa@kernel.org
This commit is contained in:
Krishna Chaitanya Chundru
2025-09-23 16:56:52 +05:30
committed by Manivannan Sadhasivam
parent c96992a24b
commit f6fd357f7a
4 changed files with 109 additions and 15 deletions
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1
drivers/pci/controller/dwc/Kconfig
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@@ -20,6 +20,7 @@ config PCIE_DW_HOST
bool
select PCIE_DW
select IRQ_MSI_LIB
select PCI_HOST_COMMON
config PCIE_DW_EP
bool