On Sat, Oct 30, 2021 at 04:19:34PM +0200, Ahmad Fatoum wrote: > The barebox-nxp-imx8mn-evk image supports both DDR4 and LPDDR4 variants > by probing for the PMIC in use as the former uses a BD71847 and the > latter a PCA9450B. > > The PCA9450B was observed to hang on the 0-byte (probe) reads. > This results in I/O errors during later PMIC writes and the image > would only boot on the EVKs with DDR4, which have the other PMIC. > > Fix this by switching to a 1 byte read instead. Change tested on > i.MX8MN DDR4 EVK as well as another board with LPDDR4. > > While at it, note the address of the PMIC in the error message, so it's > clear, what the result of the i2c probe was. > > Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> > --- > arch/arm/boards/nxp-imx8mn-evk/lowlevel.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) Applied, thanks Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
