On Thu, Oct 8, 2015 at 2:54 PM, David Daney <ddaney.cavm@xxxxxxxxx> wrote: > From: David Daney <david.daney@xxxxxxxxxx> > > Make the offset from the beginning of the "reg" property be from the > starting bus number, rather than zero. Hoist the invariant size > calculation out of the mapping for loop. > > Update host-generic-pci.txt to clarify the semantics of the "reg" > property with respect to non-zero starting bus numbers. > > Signed-off-by: David Daney <david.daney@xxxxxxxxxx> Acked-by: Rob Herring <robh@xxxxxxxxxx> > --- > This is a replacement for: > > https://lkml.org/lkml/2015/10/2/653 > > Since that patch is getting too much push-back, this is the only other > option for fixing the driver to be internally consistent in its > treatment of the offset from "reg" to the first bus in the "bus-range" > property. > > Documentation/devicetree/bindings/pci/host-generic-pci.txt | 5 +++-- > drivers/pci/host/pci-host-generic.c | 4 ++-- > 2 files changed, 5 insertions(+), 4 deletions(-) > > diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt b/Documentation/devicetree/bindings/pci/host-generic-pci.txt > index cf3e205..3f1d3fc 100644 > --- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt > +++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt > @@ -34,8 +34,9 @@ Properties of the host controller node: > - #size-cells : Must be 2. > > - reg : The Configuration Space base address and size, as accessed > - from the parent bus. > - > + from the parent bus. The base address corresponds to > + the first bus in the "bus-range" property. If no > + "bus-range" is specified, this will be bus 0 (the default). > > Properties of the /chosen node: > > diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c > index fe9a81b..bb93346 100644 > --- a/drivers/pci/host/pci-host-generic.c > +++ b/drivers/pci/host/pci-host-generic.c > @@ -169,6 +169,7 @@ static int gen_pci_parse_map_cfg_windows(struct gen_pci *pci) > struct resource *bus_range; > struct device *dev = pci->host.dev.parent; > struct device_node *np = dev->of_node; > + u32 sz = 1 << pci->cfg.ops->bus_shift; > > err = of_address_to_resource(np, 0, &pci->cfg.res); > if (err) { > @@ -196,10 +197,9 @@ static int gen_pci_parse_map_cfg_windows(struct gen_pci *pci) > bus_range = pci->cfg.bus_range; > for (busn = bus_range->start; busn <= bus_range->end; ++busn) { > u32 idx = busn - bus_range->start; > - u32 sz = 1 << pci->cfg.ops->bus_shift; > > pci->cfg.win[idx] = devm_ioremap(dev, > - pci->cfg.res.start + busn * sz, > + pci->cfg.res.start + idx * sz, > sz); > if (!pci->cfg.win[idx]) > return -ENOMEM; > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
