[PATCH v2 06/16] PCI: dwc: rockchip: Use cached PCIe capability offset
From: Hans Zhang
Date: Sat May 30 2026 - 11:31:55 EST
dw_pcie_host_init() calls .init before caching the offset. So inside
.init we call dw_pcie_get_pcie_cap() to trigger caching. The helper will
perform the DBI read (hardware is already enabled) and cache the result.
Signed-off-by: Hans Zhang <18255117159@xxxxxxx>
---
In pcie-dw-rockchip, the call chain is:
static const struct dw_pcie_host_ops rockchip_pcie_host_ops = {
.init = rockchip_pcie_host_init,
};
rockchip_pcie_host_init()
-> rockchip_pcie_enable_l0s()
-> dw_pcie_find_capability()
---
drivers/pci/controller/dwc/pcie-dw-rockchip.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
index 731d93663cca..be8b6187913d 100644
--- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
+++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
@@ -369,7 +369,7 @@ static void rockchip_pcie_enable_l0s(struct dw_pcie *pci)
u32 cap, lnkcap;
/* Enable L0S capability for all SoCs */
- cap = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
+ cap = dw_pcie_get_pcie_cap(pci);
if (cap) {
lnkcap = dw_pcie_readl_dbi(pci, cap + PCI_EXP_LNKCAP);
lnkcap |= PCI_EXP_LNKCAP_ASPM_L0S;
--
2.34.1