On Tue, Apr 29, 2014 at 08:54:24AM +0200, Marek Vasut wrote: > On Tuesday, April 29, 2014 at 07:18:34 AM, Huang Shijie wrote: > > For the m25p80.c, @dev stands for a child node for the SPI master, > > and it points to a spi_device{}. Yes, in this case, the dev->of_node is > > NULL. > > > > But for the fsl_quadspi or other SPI NOR drivers, the @dev stands for the > > controller itself, the @dev->of_node is a list of the child nodes, so we > > can _NOT_ know which child node we are working at now. > > Huh ? The dev is being recycled for two different kind of things ? yes. for the SPI bus, the of_register_spi_devices() will allocate a spi_device{} for each child node for the SPI NOR flash. So in the m25p80.c, the @dev points to a spi_device{}. For the simplicity, we do not allocate any *_device{} for the child node in the SPI NOR flash driver, such as in the fsl-quadspi.c. thanks Huang Shijie -- 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