Hi Stefano, On Do, 2015-03-26 at 13:31 +0100, Stefano Babic wrote: > Hi Jörg, > > On 26/03/2015 10:39, Jörg Krause wrote: > > Reading the GPIOs for getting the boot mode does not show the correct result > > for USB boot mode in case the recovery switch, eg. BM2 for switching from > > NAND > > to USB boot mode, is hold down while plugging in USB and released before > > U-Boot > > is loaded by mxsldr. > > > > This state is stored in the HW_OCOTP_ROM0 register. HW_OCOTP_ROM0[27:24] > > maps to > > BM3-BM0, HW_OCOTP_ROM0[28] maps to voltage selector. > > > > For using mxs_wait_mask_clr() add imx-common/misc.o to the SPL build. > > > > As far as I understand from the manual, bootmode is *always* copied > fromt the OTP after a reset. Then, I agree that is better to use OCOTP > as the GPIOs. GPIOs were already sampled by ROM at reset and their value > could be different when evaluated by SPL.
I fear the patch does not work as I expected. With OCOTP_ROM0 the boot mode can be blown, but it does not present the state of the BM pads as I understood from the RM. I thought the patch works because the boot mode is read as USB (0x0) if I do USB recovery, but it's also 0x0 for NAND boot. Sadly, no reliable way to detect boot mode. Sorry for submitting to early! Best regards Jörg Krause _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
