On Fri, Nov 3, 2017 at 10:00 PM, Maxime Ripard <maxime.rip...@free-electrons.com> wrote: > On Fri, Nov 03, 2017 at 02:21:51PM +0530, Jagan Teki wrote: >> On Thu, Nov 2, 2017 at 7:26 PM, Maxime Ripard >> <maxime.rip...@free-electrons.com> wrote: >> > On Wed, Nov 01, 2017 at 08:31:46AM +0800, Icenowy Zheng wrote: >> >> 在 2017-10-31 21:54，Maxime Ripard 写道： >> >> > On Tue, Oct 31, 2017 at 04:05:36PM +0800, icen...@aosc.io wrote: >> >> > > 在 2017-10-31 15:57，Jagan Teki 写道： >> >> > > > On Tue, Oct 31, 2017 at 5:06 AM, Icenowy Zheng <icen...@aosc.io> >> >> > > > wrote: >> >> > > > > Some H5 boards are designed to start at 1.1V CPUx voltage (e.g. >> >> > > > > Nano >> >> > > > > Pi >> >> > > > > NEO2), which may not work properly at 1008MHz if the chip's >> >> > > > > quality is >> >> > > > > not so good. >> >> > > > > >> >> > > > > Lower the default CPUx frequency of H5 to 816MHz. >> >> > > > > >> >> > > > > Signed-off-by: Icenowy Zheng <icen...@aosc.io> >> >> > > > > --- >> >> > > > > arch/arm/mach-sunxi/Kconfig | 2 +- >> >> > > > > 1 file changed, 1 insertion(+), 1 deletion(-) >> >> > > > > >> >> > > > > diff --git a/arch/arm/mach-sunxi/Kconfig >> >> > > > > b/arch/arm/mach-sunxi/Kconfig >> >> > > > > index 09cfec6f57..1fededd0a3 100644 >> >> > > > > --- a/arch/arm/mach-sunxi/Kconfig >> >> > > > > +++ b/arch/arm/mach-sunxi/Kconfig >> >> > > > > @@ -397,9 +397,9 @@ config SYS_CLK_FREQ >> >> > > > > default 1008000000 if MACH_SUN5I >> >> > > > > default 1008000000 if MACH_SUN6I >> >> > > > > default 912000000 if MACH_SUN7I >> >> > > > > + default 816000000 if MACH_SUN50I || MACH_SUN50I_H5 >> >> > > > > default 1008000000 if MACH_SUN8I >> >> > > > >> >> > > > Even orangepi pc2 has 1.1v after power-on and it's work fine [1] did >> >> > > > you find an issue with neo2? >> >> > >> >> > So you have one single model that fails, and you change the default >> >> > frequency of all the boards using that SoC? >> >> >> >> But I think we have already set the default frequency to 816MHz for >> >> A64, and it seems that several H5 boards are designed to start at 1.1v >> >> (see the notes by Jagan above). >> >> >> >> > >> >> > It seems a bit overkill. >> >> > >> >> > I guess we have two solutions: >> >> > 1) Change the frequency in that board config >> >> > 2) Change the voltage in that board config >> >> >> >> NEO2 don't have any voltage adjusting, it's fixed at 1.1V. >> >> >> >> And according to the Orange Pi PC2 and Prime schematics, they both >> >> start at 1.1V. (The Prime schematics even says "For H5 adjust >> >> VDD-CPUX to 1.1V). >> > >> > And what about the Zero Plus 2 ? >> >> Same equation with same reg values, but missing reg names on specific >> register area Page 7 [4] but hope both were same. > > Ok, so it's not some H5 boards, it's all of them. It makes sense then, > once the commit log has been changed.
Let me test and will apply all fine. thanks! -- Jagan Teki Free Software Engineer | www.openedev.com U-Boot, Linux | Upstream Maintainer Hyderabad, India. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
