[PATCH v5 3/6] PCI: spacemit-k1: Add device id update helper
From: Inochi Amaoto <inochiama@gmail.com>
Date: 2026-09-07 11:26:44
Also in:
linux-pci, linux-riscv, lkml, spacemit
Subsystem:
pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Linus Torvalds
Both K1 and K3 need to set vendor id and device id, add a helper function to simplify this. Signed-off-by: Inochi Amaoto <inochiama@gmail.com> --- drivers/pci/controller/dwc/pcie-spacemit-k1.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-spacemit-k1.c b/drivers/pci/controller/dwc/pcie-spacemit-k1.c
index 1049391beee8..c610b367412a 100644
--- a/drivers/pci/controller/dwc/pcie-spacemit-k1.c
+++ b/drivers/pci/controller/dwc/pcie-spacemit-k1.c@@ -52,6 +52,7 @@ struct k1_pcie_device_data { const struct dw_pcie_ops *ops; int (*parse_port)(struct k1_pcie *k1); unsigned int max_phy_count; + unsigned int device_id; }; struct k1_pcie {
@@ -151,6 +152,16 @@ static void k1_pcie_disable_aspm_l1(struct k1_pcie *k1) dw_pcie_dbi_ro_wr_dis(pci); } +static void k1_pcie_set_device_id(struct k1_pcie *k1) +{ + struct dw_pcie *pci = &k1->pci; + + dw_pcie_dbi_ro_wr_en(pci); + dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, PCI_VENDOR_ID_SPACEMIT); + dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, k1->data->device_id); + dw_pcie_dbi_ro_wr_dis(pci); +} + static int k1_pcie_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
@@ -166,10 +177,7 @@ static int k1_pcie_init(struct dw_pcie_rp *pp) return ret; /* Set the PCI vendor and device ID */ - dw_pcie_dbi_ro_wr_en(pci); - dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, PCI_VENDOR_ID_SPACEMIT); - dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, PCI_DEVICE_ID_SPACEMIT_K1); - dw_pcie_dbi_ro_wr_dis(pci); + k1_pcie_set_device_id(k1); /* * Start by asserting fundamental reset (drive PERST# low). The
@@ -369,6 +377,7 @@ static const struct k1_pcie_device_data k1_pcie_device_data = { .ops = &k1_pcie_ops, .parse_port = k1_pcie_parse_port, .max_phy_count = 1, + .device_id = PCI_DEVICE_ID_SPACEMIT_K1, }; static const struct of_device_id k1_pcie_of_match_table[] = {
--
2.55.0