On Thu, Jun 8, 2017 at 7:45 PM, Tom Rini <tr...@konsulko.com> wrote: > On Thu, Jun 08, 2017 at 10:17:09AM +0530, Lokesh Vutla wrote: >> >> >> On Thursday 08 June 2017 12:20 AM, Emmanuel Vadot wrote: >> > On Fri, 12 May 2017 13:20:50 -0400 >> > Tom Rini <tr...@konsulko.com> wrote: >> > >> >> On Fri, May 05, 2017 at 12:59:10PM +0530, Lokesh Vutla wrote: >> >> >> >>> am335x supports various sysclk frequencies which can be determined >> >>> using sysboot pins. PLLs should be configures based on this >> >>> sysclk frequency. Add PLL configurations for all supported >> >>> frequencies. >> >>> >> >>> Signed-off-by: Lokesh Vutla <lokeshvu...@ti.com> >> >>> Reviewed-by: Tom Rini <tr...@konsulko.com> >> >> >> >> Applied to u-boot/master, thanks! >> >> >> >> -- >> >> Tom >> > >> > Hello, >> > >> > This appears to break beaglebone black support, reverting this commit >> > make u-boot works again. >> >> hmm..I see the problem. Here we are hard coding MPU freq to 1GHz even >> efuse say it is not supported(I am not sure why this is being done, may >> be Tom can give more details). Even in kernel I see that cpufreq is >> reading efuse to determine mpu frequency. Now that we have jitter >> optimized pll configurations, looks like unsupported freq is causing an >> issue. Can you see if the below patch helps? > > Well, in the kernel, did anyone poke the Beagleboard folks about this, > before pushing the change? There's BBB shipping with chips that did not > have their efuses set, hence the way things were structured in U-Boot.
Part of the fun, most shipping BeagleBone and Varients have the proper efuse'ed silicon nowadays.. I think all my Rev B's (2GB eMMC which all 100% have the non-efused silicon) are in my up-time test farm at home. I might have an old one somewhere here at work. But yes, all BeagleBone am335x's where pinned at TI for 1Ghz support before TI started efuse'ing Regards, -- Robert Nelson https://rcn-ee.com/ _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
