From mboxrd@z Thu Jan 1 00:00:00 1970 From: vagrant@debian.org (Vagrant Cascadian) Date: Wed, 13 May 2015 10:53:28 -0700 Subject: [PATCH] ARM: dts: imx5: Add dts files for USB armory. In-Reply-To: <87y4ldnvqd.fsf@aikidev.net> References: <87h9t6i40r.fsf@aikidev.net> <20150427081428.GC9231@dragon> <87y4ldnvqd.fsf@aikidev.net> Message-ID: <87vbfwe547.fsf@aikidev.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 at 50000000/usb at 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 818 bytes Desc: not available URL: