[PATCH v7 3/6] PCI: spacemit-k1: Add device id update helper

[Inochi Amaoto <inochiama@gmail.com>]

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 8c4f0b09fe24..ec59ccb710ec 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 {
@@ -153,6 +154,16 @@ 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);
@@ -168,10 +179,7 @@ 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
@@ -381,6 +389,7 @@ 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