On 2015-04-27, Vagrant Cascadian wrote: > On 2015-04-27, Shawn Guo wrote: >> On Fri, Mar 27, 2015 at 01:23:00PM -0700, Vagrant Cascadian wrote: >>> Add support for the USB armory board by Inverse Path. This board >>> features a Freescale iMX53 SoC, 512MB RAM, and USB OTG operating in >>> either peripheral or host mode, and 5 GPIO pins. >>> >>> One .dtb is generated for operating in peripheral mode, and one is >>> generated for operating in host mode. >> >> Is it possible to ask bootloader to patch the dtb instead of maintaining >> a new one for just changing one USB property? > > It does appear to be possible with u-boot: > > load mmc 0:1 $fdt_addr_r $fdtfile > fdt addr $fdt_addr_r > fdt set /soc/aips@50000000/usb@53f80000 dr_mode host > > Since the user would have to manually select the appropriate .dtb > anyways, it may be reasonable to drop the host_mode.dtb and rely on the > u-boot to tweak the fdt on boot to switch between usb modes. Given that it is possible to set from u-boot, I'm wondering if it wouldn't be worth reworking the patch to only generate a single .dtb for now, and revisit the options for switching between USB host mode and peripheral mode later? live well, vagrant
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