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Subject[PATCH v2] PCI: aardvark: Add support for PCI Bridge Subsystem Vendor ID on emulated bridge
Date
Register with Subsystem Device/Vendor ID is at offset 0x2c. Export is via
emulated bridge.

After this change Subsystem ID is visible in lspci output at line:

Capabilities: [40] Subsystem

Signed-off-by: Pali Rohár <pali@kernel.org>

---
Changes in v2:
* Fix wrong rebase, do not add PCIE_CORE_EXP_ROM_BAR_REG
---
drivers/pci/controller/pci-aardvark.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 74511f015168..060936ef01fe 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -32,6 +32,7 @@
#define PCIE_CORE_DEV_ID_REG 0x0
#define PCIE_CORE_CMD_STATUS_REG 0x4
#define PCIE_CORE_DEV_REV_REG 0x8
+#define PCIE_CORE_SSDEV_ID_REG 0x2c
#define PCIE_CORE_PCIEXP_CAP 0xc0
#define PCIE_CORE_ERR_CAPCTL_REG 0x118
#define PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX BIT(5)
@@ -982,6 +983,8 @@ static int advk_sw_pci_bridge_init(struct advk_pcie *pcie)
/* Indicates supports for Completion Retry Status */
bridge->pcie_conf.rootcap = cpu_to_le16(PCI_EXP_RTCAP_CRSVIS);

+ bridge->subsystem_vendor_id = advk_readl(pcie, PCIE_CORE_SSDEV_ID_REG) & 0xffff;
+ bridge->subsystem_id = advk_readl(pcie, PCIE_CORE_SSDEV_ID_REG) >> 16;
bridge->has_pcie = true;
bridge->data = pcie;
bridge->ops = &advk_pci_bridge_emul_ops;
--
2.20.1
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