[PATCH v3 14/16] PCI: dwc: spear13xx: Use cached PCIe capability offset
From: Hans Zhang <18255117159@163.com>
Date: 2026-07-20 15:08:27
Also in:
imx, linux-amlogic, linux-arm-msm, linux-pci, linux-riscv, linux-rockchip, linux-tegra, lkml, spacemit
Subsystem:
pci native host bridge and endpoint drivers, pci subsystem, pcie driver for st spear13xx, the rest · Maintainers:
Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Pratyush Anand, Linus Torvalds
Inside .init we must call dw_pcie_get_pcie_cap() to obtain the offset,
because the core has not yet cached it. The hardware is already enabled
by the driver's own initialization before this point.
Signed-off-by: Hans Zhang <18255117159@163.com>
---
In pcie-spear13xx, the call chain is:
static const struct dw_pcie_host_ops spear13xx_pcie_host_ops = {
.init = spear13xx_pcie_host_init,
};
spear13xx_pcie_host_init()
-> dw_pcie_find_capability()
---
drivers/pci/controller/dwc/pcie-spear13xx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index 01794a9d3ad2..6e4c11b497d4 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c@@ -122,7 +122,7 @@ static int spear13xx_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci); - u32 exp_cap_off = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); + u8 exp_cap_off = dw_pcie_get_pcie_cap(pci); u32 val; spear13xx_pcie->app_base = pci->dbi_base + 0x2000;
--
2.34.1