Messages in this thread | | | Subject | Re: [RFC PATCH 2/3] RISC-V: Initial DTS for Microchip ICICLE board | From | Ben Dooks <> | Date | Tue, 3 Nov 2020 18:46:06 +0000 |
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On 03/11/2020 18:40, Cyril.Jean@microchip.com wrote: > On 11/3/20 6:28 PM, Ben Dooks wrote: >> EXTERNAL EMAIL: Do not click links or open attachments unless you know >> the content is safe >> >> On 03/11/2020 18:10, Cyril.Jean@microchip.com wrote: >>> On 11/3/20 3:07 PM, Atish Patra wrote: >>>> EXTERNAL EMAIL: Do not click links or open attachments unless you >>>> know the content is safe >>>> >>>> On Fri, Oct 30, 2020 at 2:20 PM Ben Dooks >>>> <ben.dooks@codethink.co.uk> wrote: >> >> ,snip[ >> >>>>>> @Cyril : Can we enable both eMMC & sdcard at the same time ? >>>>> I would put /both/ in but only enable the one in use for the moment. >>>>> Our boards are booting of eMMC as supplied, so this isn't going to >>>>> work >>>>> as well. The eMMC is 8bit wide, and thus is only delivering 11MB/sec >>>>> instead of 22MB/sec. This performance is still not great, but losing >>>>> half the data-rate is just not good. >>>>> >>>> I am not sure what should be enabled by default. Updating sdcard is >>>> much >>>> easier than eMMC card and we use that approach. >>>> >>>> @Cyril: Is there a way that we can enable both ? >>>> >>> Yes, we can enable both but this requires a modification to the FPGA >>> design. One of the guys prototyped this while I was away. We will move >>> this along. This will require reprogramming the FPGA with a new design >>> and HSS version. >>> >>> Regards, >>> >>> Cyril. >> >> I either missed or couldn't find a way of forcing the boot mode to be >> from the SD slot. Have I missed something? At the moment we'd like to >> have more storage available as the ~7G free on the eMMC is not enough. >> > Currently, you need to program a different FPGA bitstream on the board > to boot from SD-card. The different bitstream configures muxes on the > board to connect the SD slot to the FPGA and the HSS included in the bit > stream configures the FPGA IOs correctly. > > Links to the programming files are found in this document: > https://github.com/polarfire-soc/polarfire-soc-documentation/blob/master/boards/mpfs-icicle-kit-es/updating-icicle-kit/updating-icicle-kit-design-and-linux.md
Thanks, but i've no way of remotely re-writing the bitstream of the FPGA since the tools are x86 only and we're using a Pi3 to connect the boards we have to the network.
-- Ben Dooks http://www.codethink.co.uk/ Senior Engineer Codethink - Providing Genius
https://www.codethink.co.uk/privacy.html
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