On Mon, 12 Sep 2016, Sascha Hauer wrote: > On Fri, Sep 09, 2016 at 05:43:39PM +0200, Alexander Kurz wrote: > > Signed-off-by: Alexander Kurz <akurz@xxxxxxxx> > > --- > > Documentation/boards/imx.rst | 1 + > > arch/arm/mach-imx/include/mach/generic.h | 13 +++++++++++++ > > arch/arm/mach-imx/include/mach/imx_cpu_types.h | 1 + > > 3 files changed, 15 insertions(+) > > Seems to be straight forward to add i.MX50 support. I have nothing to > add, except: Applied, thanks > > Out of curiosity: What device do you use with i.MX50? Is it some E-Book > reader again? The imx50 has a build-in e-ink driver, so it is more or less a SOC tailored on e-books. It is used in some already outdated e-books like the 4th and 5th generation Kindles, some Kobos and Tolinos. The successor for the imx50 became the e-ink driver equiped variants of the imx6sl, which is used in most current generation e-book readers. While the current patchsets will enable barebox to run on different e-books e.g. when beeing booted via an installed bootloader, there is still an open issue: RAM initialization. Freescale used a "DRAMMC" which seems to be very unique to this SOC. Documentation on it is available in the Reference Manual, but it covers some details quite briefly. Related on barebox: it is not clear, whether DRAMMC initialization via imximg-DCD is possible at all. All existing bootloaders I have seen so far used some imximg-plugin code (which is currently not supported by barebox). A two-stage bootloader implementation via xload may be an alternative. One note "ARM i.MX50: Add iomux definitions for non-DT board implementations": this patch enables non-DT board code. While DT implementations of new board code would be a better choice, DT-based board code is currently not able to pass ATAGs. At least some Kindle-Kernels still rely on ATAGs. Cheers, Alexander _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
