On Mon, Apr 28, 2014 at 12:57 PM, Pawel Moll <pawel.moll@xxxxxxx> wrote: > In "Device Tree powered" systems, platform devices are usually > massively populated with of_platform_populate() call, executed > at some level of initcalls, either by generic architecture > or by platform-specific code. > > There are situations though where certain devices must be > created (and bound with drivers) before all the others. > This presents a challenge, as devices created explicitly > would be created again by of_platform_populate(). > > This patch tries to solve that issue in a generic way, > adding a "populated" flag for a DT node description. > Once set, this device will never be created again via > of_* API, so of_platform_populate() will skip such nodes > (and its children) in a similar way to the non-available > ones. > > Cc: devicetree@xxxxxxxxxxxxxxx > Signed-off-by: Pawel Moll <pawel.moll@xxxxxxx> > --- > drivers/of/platform.c | 10 ++++++++-- > include/linux/of.h | 1 + > 2 files changed, 9 insertions(+), 2 deletions(-) > > diff --git a/drivers/of/platform.c b/drivers/of/platform.c > index 404d1da..0ae757a 100644 > --- a/drivers/of/platform.c > +++ b/drivers/of/platform.c > @@ -204,7 +204,8 @@ static struct platform_device *of_platform_device_create_pdata( > { > struct platform_device *dev; > > - if (!of_device_is_available(np)) > + if (!of_device_is_available(np) || > + of_node_check_flag(np, OF_POPULATED)) This and the amba case should be a test_and_set operation to avoid a race condition. Rob -- 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