On 07/26/2012 02:55 PM, Thierry Reding wrote: > When a bus specifies #address-cells > 2, of_bus_default_map() now > assumes that the mapping isn't for a physical address but rather an > identifier that needs to match exactly. > > This is required by bindings that use multiple cells to translate a > resource to the parent bus (device index, type, ...). > > See here for the discussion: > > https://lists.ozlabs.org/pipermail/devicetree-discuss/2012-June/016577.html > > Originally-by: Arnd Bergmann <arnd@xxxxxxxx> > Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx> Acked-by: Rob Herring <rob.herring@xxxxxxxxxxx> > --- > Changes in v3: > - new patch > > drivers/of/address.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/of/address.c b/drivers/of/address.c > index 7e262a6..2776119 100644 > --- a/drivers/of/address.c > +++ b/drivers/of/address.c > @@ -69,6 +69,14 @@ static u64 of_bus_default_map(u32 *addr, const __be32 *range, > (unsigned long long)cp, (unsigned long long)s, > (unsigned long long)da); > > + /* > + * If the number of address cells is larger than 2 we assume the > + * mapping doesn't specify a physical address. Rather, the address > + * specifies an identifier that must match exactly. > + */ > + if (na > 2 && memcmp(range, addr, na * 4) != 0) > + return OF_BAD_ADDR; > + > if (da < cp || da >= (cp + s)) > return OF_BAD_ADDR; > return da - cp; > -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
