On Thu, Nov 10, 2022 at 04:46:21PM +0100, Lorenzo Pieralisi wrote: > On Wed, Nov 09, 2022 at 12:25:53AM -0800, Matt Ranostay wrote: > > Various platforms have different maximum amount of lanes that > > can be selected. Add max_lanes to struct j721e_pcie to allow > > for error checking on num-lanes selection from device tree. > > https://lore.kernel.org/linux-pci/CAL_JsqJ5cOLXhD-73esmhVwMEWGT+w3SJC14Z0jY4tQJQRA7iw@xxxxxxxxxxxxxx > > Why have you reposted this patch ? > Max lanes is still needed to calculate the bitmask (i.e. 2x needing one-bit mask, and 4x needing 2-bit mask), but noticed that I should have change th commit message to be more clear, and drop the part of it being for device-tree validation.. 'PCI: j721e: Add warnings on num-lanes misconfiguration' could be dropped in the series if validation should be done in the YAML schema checking. - Matt > Lorenzo > > > Signed-off-by: Matt Ranostay <mranostay@xxxxxx> > > Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx> > > --- > > drivers/pci/controller/cadence/pci-j721e.c | 11 ++++++++--- > > 1 file changed, 8 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c > > index a82f845cc4b5..875224d34958 100644 > > --- a/drivers/pci/controller/cadence/pci-j721e.c > > +++ b/drivers/pci/controller/cadence/pci-j721e.c > > @@ -48,8 +48,6 @@ enum link_status { > > > > #define GENERATION_SEL_MASK GENMASK(1, 0) > > > > -#define MAX_LANES 2 > > - > > struct j721e_pcie { > > struct cdns_pcie *cdns_pcie; > > struct clk *refclk; > > @@ -72,6 +70,7 @@ struct j721e_pcie_data { > > unsigned int quirk_disable_flr:1; > > u32 linkdown_irq_regfield; > > unsigned int byte_access_allowed:1; > > + unsigned int max_lanes; > > }; > > > > static inline u32 j721e_pcie_user_readl(struct j721e_pcie *pcie, u32 offset) > > @@ -291,11 +290,13 @@ static const struct j721e_pcie_data j721e_pcie_rc_data = { > > .quirk_retrain_flag = true, > > .byte_access_allowed = false, > > .linkdown_irq_regfield = LINK_DOWN, > > + .max_lanes = 2, > > }; > > > > static const struct j721e_pcie_data j721e_pcie_ep_data = { > > .mode = PCI_MODE_EP, > > .linkdown_irq_regfield = LINK_DOWN, > > + .max_lanes = 2, > > }; > > > > static const struct j721e_pcie_data j7200_pcie_rc_data = { > > @@ -303,23 +304,27 @@ static const struct j721e_pcie_data j7200_pcie_rc_data = { > > .quirk_detect_quiet_flag = true, > > .linkdown_irq_regfield = J7200_LINK_DOWN, > > .byte_access_allowed = true, > > + .max_lanes = 2, > > }; > > > > static const struct j721e_pcie_data j7200_pcie_ep_data = { > > .mode = PCI_MODE_EP, > > .quirk_detect_quiet_flag = true, > > .quirk_disable_flr = true, > > + .max_lanes = 2, > > }; > > > > static const struct j721e_pcie_data am64_pcie_rc_data = { > > .mode = PCI_MODE_RC, > > .linkdown_irq_regfield = J7200_LINK_DOWN, > > .byte_access_allowed = true, > > + .max_lanes = 1, > > }; > > > > static const struct j721e_pcie_data am64_pcie_ep_data = { > > .mode = PCI_MODE_EP, > > .linkdown_irq_regfield = J7200_LINK_DOWN, > > + .max_lanes = 1, > > }; > > > > static const struct of_device_id of_j721e_pcie_match[] = { > > @@ -433,7 +438,7 @@ static int j721e_pcie_probe(struct platform_device *pdev) > > pcie->user_cfg_base = base; > > > > ret = of_property_read_u32(node, "num-lanes", &num_lanes); > > - if (ret || num_lanes > MAX_LANES) > > + if (ret || num_lanes > data->max_lanes) > > num_lanes = 1; > > pcie->num_lanes = num_lanes; > > > > -- > > 2.38.GIT > >
