Hi Eric, On Mon, Jun 28, 2010 at 12:55:45PM +0800, Eric Miao wrote: > I suggest you to have a look into arch/arm/mach-mmp/devices.c and > arch/arm/mach-mmp/pxa{168,910}.c as well as > arch/arm/mach-mmp/include/mach/pxa{168,910}.h, maybe we can find > some common practice. I think I like this approach in general, I already thought about not passing all parameters as function/macro arguments, too. But maybe this becomes too excessive for imx as I would need too many of these device desc for the different imx variants?! Anyhow a few things I thought when looking in the files you suggested: - Why not use an array for all uart devdescs, maybe the code for pxa168_add_uart could become a bit smaller then?: extern struct pxa_device_desc pxa168_device_uart[2]; ... static inline int pxa168_add_uart(int id) { struct pxa_device_desc *d = pxa168_device_uart + id; if (id < 0 || id > 2) return -EINVAL; return pxa_register_device(d, NULL, 0); } (Ditto for the other types obviously.) - shouldn't all these pxa_device_descs and pxa168_add_$device functions be __initdata and __init? - pxa_register_device is better than my add_resndata function in (at least) one aspect as it sets coherent_dma_mask, too. This is something I missed when trying to add mxc-mmc (IIRC) devices. Thanks Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html