From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Thu, 28 Jan 2016 20:29:31 +0100 Subject: [linux-sunxi] Problem with Allwinner H3 clocks In-Reply-To: <20160128175918.78a916a8cd7bf4c0b2f2814f@free.fr> References: <20160127084607.665fb8c38eeb5733ce4232da@free.fr> <20160127103714.58312b152adb4148bae2f93b@free.fr> <56A8D5E5.30701@gmail.com> <20160127175512.87caf31b5e21a1fec91507f2@free.fr> <56A9098A.5010107@redhat.com> <20160127200217.14dce96ade71cf81bc82e6f6@free.fr> <56A9CE3D.4020906@redhat.com> <56AA14AA.4070502@gmail.com> <20160128175918.78a916a8cd7bf4c0b2f2814f@free.fr> Message-ID: <20160128192931.GB32462@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Jan 28, 2016 at 05:59:18PM +0100, Jean-Francois Moine wrote: > On Thu, 28 Jan 2016 14:16:26 +0100 > Jens Kuske wrote: > > > after figuring out how to boot a devicetree kernel with allwinner's > > u-boot I only had to add the mandatory > > > > clock-frequency = <24000000>; > > arm,cpu-registers-not-fw-configured; > > > > to the timer node and v4.5-rc1 booted successfully. They are > > intentionally left out in the official dt, because documentation says > > one should prefer to fix the firmware -> mainline u-boot > > No problems with clocks or uart here. > > You are right, I had these lines in my DT. Thanks. And even though you had these lines, it was still not working? Or is it working now? I'm confused. > But, now, what about the PLL8 (periph1) which should be used by the MMCs? I just sent another version of the pll6 rework to enable it. > The A23/A33/H3 (and surely some other SoCs) documentations about > the peripheral/periph/periph0/periph1 PLLs say: > > Note: The PLL Output should be fixed to 600MHz, it is not > recommended to vary this value arbitrarily. I don't know if it's worth it at this point. The pll6 seems to work fine at other rates. Have you experienced any breakage when running at another frequency? Thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: