device-tree example for altera-cyclone-v bsp
sebastian.huber at embedded-brains.de
Mon Feb 18 08:17:21 UTC 2019
I added some basic BSP documentation:
On 14/02/2019 13:54, Christian Spindeldreier wrote:
> we had to change the BSP_ARM_A9MPCORE_PERIPHCLK frequency to 100 MHz
> as this is the frequency the L4 MP clock is set by Qsys or the SPL,
> respectively. This meant adding a second board to the altera-cyclone-v
> bsp differing only by this configuration option. Adapting the
> configuration as described enabled the upstream RTEMS-5 version to
> boot on the Terasic-DE10 Standard Board
I changed the BSP initialization to use the device tree for this clock:
It would be nice if you could test this. Please remove the
"BSP_ARM_A9MPCORE_PERIPHCLK=100000000" from the configure command line.
> U-Boot itself contains a device-tree of the board it is running on,
> but i missed the u-boot command handing over the u-boot device-tree to
> rtems which expects the device-tree address in R6 on startup. If there
> is anything like this i am pleased on any information on it.
The device tree provided by U-Boot is in r2.
Sebastian Huber, embedded brains GmbH
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