Hi, On 8/20/19 3:15 AM, Maxime Ripard wrote: > On Mon, Aug 19, 2019 at 10:23:06PM -0500, Samuel Holland wrote: >> The A80 SoC contains a message box that can be used to send messages and >> interrupts back and forth between the ARM application CPUs and the ARISC >> coprocessor. Add a device tree node for it. >> >> Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx> > > I think you mentionned that crust has been tested only on the A64 and > the H3/H5, did you test the mailbox on those other SoCs as well? No, I only have A64/H3/H5, and recently H6, hardware to test. I've looked through the manuals to verify that the registers are all the same, but I haven't run the driver on earlier SoCs. On 32-bit SoCs, where there's no other user of SRAM A2, it should be easy to get the toy firmware running. All you should need to do is: 1) Update the MMIO base/clock addresses in drivers/msgbox/sunxi-msgbox.c 2) Update the load address in platform/sun50i/include/platform/memory.h 3) Load the firmware to SRAM A2 (can be done from a U-Boot shell) 4) Initialize the reset vector (algorithm is in tools/test.c:109) 5) Deassert AR100 reset (again, these last two steps can be done from U-Boot) Thanks, Samuel
