Hi Ahmad. Thanks for adding the docs. On Mon, Apr 01, 2019 at 12:18:23PM +0200, Ahmad Fatoum wrote: > Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> > --- > .../boards/at91/microchip-ksz9477-evb.rst | 38 ++++++++++++++++++- > 1 file changed, 36 insertions(+), 2 deletions(-) > > diff --git a/Documentation/boards/at91/microchip-ksz9477-evb.rst b/Documentation/boards/at91/microchip-ksz9477-evb.rst > index 4c4c4aecbfb3..2a68c2a552cd 100644 > --- a/Documentation/boards/at91/microchip-ksz9477-evb.rst > +++ b/Documentation/boards/at91/microchip-ksz9477-evb.rst > @@ -1,11 +1,45 @@ > Microchip KSZ 9477 Evaluation board > =================================== > > -This is an evaluation board for a switch that uses the at91sam9x5 CPU. > +This is an evaluation board for the KSZ9477 switch that uses the sama5d36 CPU. > The board uses Device Tree and supports multi image. > > -Building barebox: > +Building barebox as second stage bootloader: > > .. code-block:: sh > > make ARCH=arm microchip_ksz9477_evb_defconfig > + > +There are also a separate defconfig for operating barebox as first stage > +bootloader originating from SD Card. > +This configuration doesn't yet support device-tree use as the NVM bootloader > +(SoC ROM code) requires the first stage bootloader to fit into 64K. > + > +Generally, the first stage may comes from any of the following boot > +sources (in that order): > + > +* SPI0 CS0 Flash > +* SD Card > +* NAND Flash > +* SPI0 CS1 Flash > +* I2C EEPROM > + > +After being loaded into SRAM by the NVM bootloader, the first stage does low > +level clock initialization, configuration of the DDRAM controller and > +bootstraps the second stage boot loader. > + > +SD Card Bootstrap > +----------------- > + > +For boot from SD card, barebox additionally needs to be configured as > +first stage bootloader: > + > +.. code-block:: sh > + > + make ARCH=arm microchip_ksz9477_evb_bootstrap_mmc_defconfig > + > +The resulting barebox image must be renamed to ``BOOT.BIN`` When I am away from barebox development for some weeks I always have troubles what it the right file to use. I suggest to use specific filename rather than the vauge "resulting barebox image". Sam _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
