diff options
| author | Pali Rohár <pali@kernel.org> | 2022-07-12 01:59:15 +0300 |
|---|---|---|
| committer | Lorenzo Pieralisi <lpieralisi@kernel.org> | 2022-09-16 15:39:44 +0300 |
| commit | a080f9ad604598a4d32ea36fbf96437c92ccacb4 (patch) | |
| tree | 7be25b792ed458fa240617dc4527878636812688 /drivers/pci | |
| parent | 568035b01cfb107af8d2e4bd2fb9aea22cf5b868 (diff) | |
| download | linux-a080f9ad604598a4d32ea36fbf96437c92ccacb4.tar.xz | |
PCI: aardvark: Add support for PCI Bridge Subsystem Vendor ID on emulated bridge
Register with Subsystem Device/Vendor ID is at offset 0x2c.
Export it via the emulated bridge to enable support for the Subsystem
Device/Vendor ID - by reading it in the PCI controller config space and
storing it in the emulated bridge control structures, so that it is
exposed in the respective PCI capability.
After this change Subsystem ID is visible in lspci output at line:
Capabilities: [40] Subsystem
Link: https://lore.kernel.org/r/20220711225915.13896-1-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/pci-aardvark.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 966c8b48bd96..7cc51cfb8a13 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -33,6 +33,7 @@ #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_PCIERR_CAP 0x100 #define PCIE_CORE_ERR_CAPCTL_REG 0x118 @@ -1077,6 +1078,8 @@ 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; |