From mboxrd@z Thu Jan 1 00:00:00 1970 From: s.trumtrar@pengutronix.de (Steffen Trumtrar) Date: Wed, 30 Jan 2013 14:10:44 +0100 Subject: [PATCH] ARM i.MX25: clk: parent per5_clk to AHB clock In-Reply-To: <20130130095353.GI8668@pengutronix.de> References: <1359538435-21304-1-git-send-email-s.trumtrar@pengutronix.de> <20130130095353.GI8668@pengutronix.de> Message-ID: <20130130131044.GA20392@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Jan 30, 2013 at 10:53:53AM +0100, Uwe Kleine-K?nig wrote: > On Wed, Jan 30, 2013 at 10:33:55AM +0100, Steffen Trumtrar wrote: > > The mxc-timer on the imx25 needs to be derived from the AHB clock. > > If a bootloader reparents this clock to the ipg_clk_highfreq, which according > > to the datasheet is a valid operation, the system can/will produce lockups/ > > freezes after some time [1]. > > > > This can be forced with code like > > while(1) > > syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); > > > > This was already fixed with the commit > > "i.MX25 GPT clock fix: ensure correct the clock source" [2], > > but it seems, that it got lost. So, re-add this to have a correct gpt. > > > > [1]: http://lists.arm.linux.org.uk/lurker/message/20130129.161230.229bda17.en.html > > [2]: 2012d9ca2a1381ae3e733330a7f0d1d2f1988bba > Instead of the last paragraph I'd write: > > This problem was already fixed with commit > > 2012d9c (i.MX25 GPT clock fix: ensure correct the clock source) > > for v3.1-rc2 but this was lost when i.MX was converted to the common > clock framework (commit 6bbaec5; ARM i.MX25: implement clocks using > common clock framework). > > > Signed-off-by: Steffen Trumtrar > > Cc: stable at vger.kernel.org > > Cc: stable at vger.kernel.org # v3.5+ > That is better. I will resend my patch in a sec with a new commit message. Thanks, Steffen -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |