On Mon, Mar 20, 2023 at 12:41:23PM +0100, Roland Hieber wrote: > Signed-off-by: Roland Hieber <rhi@xxxxxxxxxxxxxx> > --- > Documentation/boards/imx.rst | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) Applied, thanks Sascha > > diff --git a/Documentation/boards/imx.rst b/Documentation/boards/imx.rst > index 6c16923340a8..6fbf1554d10e 100644 > --- a/Documentation/boards/imx.rst > +++ b/Documentation/boards/imx.rst > @@ -86,8 +86,8 @@ The images can also always be started as second stage on the target: > BootROM Reboot mode codes (bmode) > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > -For select SoCs, barebox supports communicating an alternative boot medium > -that BootROM should select after a warm reset:: > +For selected SoCs, barebox supports communicating an alternative boot medium > +that the BootROM should select after a warm reset:: > > barebox@FSL i.MX8MM EVK board:/ devinfo gpr.reboot_mode > Driver: syscon-reboot-mode > @@ -107,10 +107,17 @@ that BootROM should select after a warm reset:: > > barebox@FSL i.MX8MM EVK board:/ gpr.reboot_mode.next=serial reset -w > > -This will cause barebox to fall into serial download mode on an i.MX8MM. > +The example above will cause barebox to jump back into serial download mode on > +an i.MX8MM by writing 0x10 into the *SRC_GPR9* register (offset 0x30390094) and > +0x40000000 into the *SRC_GPR10* register (offset 0x30390098), and then issuing a > +warm :ref:`reset <command_reset>`. > > Different SoCs may have more possible reboot modes available. > -See the section on :ref:`Reboot modes<reboot_mode>` for more information. > +Look for documentation of the *SRC_SBMR* and *SRC_GPR* registers in the > +Reference Manual of your SoC; the values for the ``mode-*`` properties often > +correspond directly to the boot fusemap settings. > + > +See the section on :ref:`Reboot modes<reboot_mode>` for general information. > > High Assurance Boot > ^^^^^^^^^^^^^^^^^^^ > -- > 2.30.2 > > > -- 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 |
