| Message ID | 20200506151429.12255-9-kishon@ti.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Delegated to: | Lorenzo Pieralisi |
| Headers | show |
| Series | Add PCIe support to TI's J721E SoC | expand |
On Wed, May 06, 2020 at 08:44:23PM +0530, Kishon Vijay Abraham I wrote: > Commit 1b79c5284439 ("PCI: cadence: Add host driver for Cadence PCIe > controller") in order to update Vendor ID, directly wrote to > PCI_VENDOR_ID register. However PCI_VENDOR_ID in root port configuration > space is read-only register and writing to it will have no effect. > Use local management register to configure Vendor ID and Subsystem Vendor > ID. > > Fixes: 1b79c5284439 ("PCI: cadence: Add host driver for Cadence PCIe controller") Fixes should come first. > Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> > --- > drivers/pci/controller/cadence/pcie-cadence-host.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c b/drivers/pci/controller/cadence/pcie-cadence-host.c index 7c220671e66f..c7dc7be0da40 100644 --- a/drivers/pci/controller/cadence/pcie-cadence-host.c +++ b/drivers/pci/controller/cadence/pcie-cadence-host.c @@ -70,6 +70,7 @@ static int cdns_pcie_host_init_root_port(struct cdns_pcie_rc *rc) { struct cdns_pcie *pcie = &rc->pcie; u32 value, ctrl; + u32 id; /* * Set the root complex BAR configuration register: @@ -89,8 +90,12 @@ static int cdns_pcie_host_init_root_port(struct cdns_pcie_rc *rc) cdns_pcie_writel(pcie, CDNS_PCIE_LM_RC_BAR_CFG, value); /* Set root port configuration space */ - if (rc->vendor_id != 0xffff) - cdns_pcie_rp_writew(pcie, PCI_VENDOR_ID, rc->vendor_id); + if (rc->vendor_id != 0xffff) { + id = CDNS_PCIE_LM_ID_VENDOR(rc->vendor_id) | + CDNS_PCIE_LM_ID_SUBSYS(rc->vendor_id); + cdns_pcie_writel(pcie, CDNS_PCIE_LM_ID, id); + } + if (rc->device_id != 0xffff) cdns_pcie_rp_writew(pcie, PCI_DEVICE_ID, rc->device_id);
Commit 1b79c5284439 ("PCI: cadence: Add host driver for Cadence PCIe controller") in order to update Vendor ID, directly wrote to PCI_VENDOR_ID register. However PCI_VENDOR_ID in root port configuration space is read-only register and writing to it will have no effect. Use local management register to configure Vendor ID and Subsystem Vendor ID. Fixes: 1b79c5284439 ("PCI: cadence: Add host driver for Cadence PCIe controller") Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> --- drivers/pci/controller/cadence/pcie-cadence-host.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)