Hi Guenter, On Nov 6, 2013, at 11:17 PM, Guenter Roeck wrote: > On Wed, Nov 06, 2013 at 09:38:21PM +0100, Sebastian Andrzej Siewior wrote: >> On 06.11.13, Guenter Roeck wrote: >>> At least that is our use case. u-boot doesn't know which cards are going to be >>> inserted at runtime. Even PCIe hotplug itself is insufficient, as the PCIe >>> configuration differs per card, and the cards support a variety of i2c devices >>> as well as other card specific devices such LEDs and multi-function FPGAs. >> >> So you have your FPGA behind PCIe and you use the DT to describe the >> chips behind i2c? And then you update your FPGA and want update the >> devices in DT without reboot? >> > No. > > We have a variety of boards ... [snip] TL;DR the real world... > > We use DT overlays to describe the hardware on those boards and, if necessary, > its configuration. For example, if there is a PCIe switch, the overlay would > describe its memory and bus number configuration. > > Guenter Glad it's been useful... Regards -- Pantelis-- 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
