Messages in this thread |  | | Date | Tue, 17 Dec 2019 12:42:39 +0000 | From | Andrew Murray <> | Subject | Re: [PATCH 08/13] PCI: cadence: Use local management register to configure Vendor ID |
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On Mon, Dec 09, 2019 at 02:51:42PM +0530, Kishon Vijay Abraham I wrote: > 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.
Is this a bug fix? Can you add a Fixes tag and make that clearer?
Thanks,
Andrew Murray
> > 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(-) > > diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c b/drivers/pci/controller/cadence/pcie-cadence-host.c > index cf817be237af..afb2c96a6538 100644 > --- a/drivers/pci/controller/cadence/pcie-cadence-host.c > +++ b/drivers/pci/controller/cadence/pcie-cadence-host.c > @@ -71,6 +71,7 @@ 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: > @@ -90,8 +91,12 @@ 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); > > -- > 2.17.1 >
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