> From: Stephen Warren <swarren@xxxxxxxxxx> > > mfd_add_device() assigns .of_node in the device objects it creates only > if the mfd_cell for the device has the .of_compatible field set and the > DT node for the top-level MFD device contains a child whose compatible > property matches the cell's .of_compatible field. > > This leaves .of_node unset in many cases. When this happens, entries in > the DT /aliases property which refer to the top-level MFD DT node will > never match the MFD child devices, hence causing the requested alias not > to be honored. > > Solve this by setting each MFD child device's .of_node equal to the top- > level MFD device's .of_node field in the cases where it would otherwise > remain unset. How sure are you that this will be void of repercussions? > The first use-case for this will be aliases for the TPS6586x's RTC > device. Isn't it viable to supply the of_compatible strings for these nodes and search the parent for its alias property instead? > Signed-off-by: Stephen Warren <swarren@xxxxxxxxxx> > --- > The 3 patches in this series are all independent; they can be applied > to their respective subsystems in any order. I'm simply posting them as > a series to make the use-case more obvious. > --- > drivers/mfd/mfd-core.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c > index 267649244737..32e8d47d9002 100644 > --- a/drivers/mfd/mfd-core.c > +++ b/drivers/mfd/mfd-core.c > @@ -117,6 +117,8 @@ static int mfd_add_device(struct device *parent, int id, > } > } > } > + if (!pdev->dev.of_node) > + pdev->dev.of_node = parent->of_node; > > if (cell->pdata_size) { > ret = platform_device_add_data(pdev, -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- 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