From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Tue, 29 Sep 2015 14:09:43 +0200 Subject: [linux-sunxi] [PATCH] i2c: mv64xxx: The n clockdiv factor is 0 based on sunxi SoCs In-Reply-To: <560813CF.4000807@schinagl.nl> References: <1443365828-8956-1-git-send-email-hdegoede@redhat.com> <560813CF.4000807@schinagl.nl> Message-ID: <20150929120943.GP7104@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sun, Sep 27, 2015 at 06:05:35PM +0200, Olliver Schinagl wrote: > Hey Hans, > > On 27-09-15 16:57, Hans de Goede wrote: > >According to the datasheets to n factor for dividing the tclk is > >2 to the power n on Allwinner SoCs, not 2 to the power n + 1 as it is > >on other mv64xxx implementations. > Ah! > > > >I've contacted Allwinner about this and they have confirmed that the > >datasheet is correct. > > > >This commit fixes the clk-divider calculations for Allwinner SoCs > >accordingly. > So this explains why all my i2c frequenties are double of what I setup. > Thanks for taking the time of figuring it out! I'll give it a test hopefully > soon. It would have been great to let us know... 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: