From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Wed, 18 May 2016 21:59:29 +0200 Subject: [PATCH 02/16] clk: sunxi-ng: Add common infrastructure In-Reply-To: <20160517085427.f2f3aa0c66686f8f5f6318ff@free.fr> References: <1462737711-10017-1-git-send-email-maxime.ripard@free-electrons.com> <1462737711-10017-3-git-send-email-maxime.ripard@free-electrons.com> <20160515183122.GA27618@lukather> <20160516100239.a93a238b0d458b38a3689a95@free.fr> <20160516201509.GL27618@lukather> <20160517085427.f2f3aa0c66686f8f5f6318ff@free.fr> Message-ID: <20160518195929.GS27618@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, May 17, 2016 at 08:54:27AM +0200, Jean-Francois Moine wrote: > On Mon, 16 May 2016 22:15:09 +0200 > Maxime Ripard wrote: > > > > > Yes, I intended it to be a simple busy waiting loop since I don't > > > > expect it to be very long. Do yu have any more data on how much time > > > > it usually takes? > > > > > > I have a Soc in which the rate of the audio clock is stable after a > > > good second. > > > > You mean before the clock is actually stable, or before the lock bit > > is cleared? > > > > Which SoC is it? As far as I've seen, only the H3 allows to configure > > the stable time, and while by default it will take 16us, you can > > configure as high as 66ms (which is still way higher than the current > > limit). > > Hi Maxime, > > Well, it is not a SoC, but an external chip, the SI5351 (in the Dove > Cubox). There is no lock bit, but as it is used for audio, and as I did > not set any delay at streaming start time, I can hear when the clock is > stable. Ok. So I guess we set it high enough to cover the maximum we know for know (65ms), and we can always rise that up later if needed. 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: not available URL: