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Message-ID: <DB3PR0402MB3916233A56CF5DF778115716F5C30@DB3PR0402MB3916.eurprd04.prod.outlook.com>
Date:   Sat, 27 Jul 2019 06:19:07 +0000
From:   Anson Huang <anson.huang@....com>
To:     Daniel Baluta <daniel.baluta@...il.com>
CC:     "rui.zhang@...el.com" <rui.zhang@...el.com>,
        "edubezval@...il.com" <edubezval@...il.com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Lucas Stach <l.stach@...gutronix.de>,
        Abel Vesa <abel.vesa@....com>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        "Angus Ainslie (Purism)" <angus@...ea.ca>,
        Carlo Caione <ccaione@...libre.com>,
        Guido Günther <agx@...xcpu.org>,
        Leonard Crestez <leonard.crestez@....com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH 5/6] clk: imx8mq: Remove CLK_IS_CRITICAL flag for
 IMX8MQ_CLK_TMU_ROOT

Hi, Daniel

> Subject: Re: [PATCH 5/6] clk: imx8mq: Remove CLK_IS_CRITICAL flag for
> IMX8MQ_CLK_TMU_ROOT
> 
> Hi all,
> 
> latest linux-next hangs at boot.
> 
> commit fde50b96be821ac9673a7e00847cc4605bd88f34 (HEAD -> master, tag:
> next-20190726, origin/master, origin/HEAD)
> Author: Stephen Rothwell <sfr@...b.auug.org.au>
> Date:   Fri Jul 26 15:18:02 2019 +1000
> 
>     Add linux-next specific files for 20190726
> 
>     Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> 
> 
> I know this is crazy but reverting commit:
> 
> commit 431bdd1df48ee2896ea9980d9153e3aeaf0c81ef (refs/bisect/bad)
> Author: Anson Huang <Anson.Huang@....com>
> Date:   Fri Jul 5 12:56:11 2019 +0800
> 
>     clk: imx8mq: Remove CLK_IS_CRITICAL flag for IMX8MQ_CLK_TMU_ROOT
> 
>     IMX8MQ_CLK_TMU_ROOT is ONLY used for thermal module, the driver
>     should manage this clock, so no need to have CLK_IS_CRITICAL flag
>     set.
> 
> 
> 
> makes the boot work again.
> 
> Any idea?

I just found if disabling SDMA1, then kernel can boot up, it does NOT make sense
TMU clock is related to SDMA1, I will check with design and get back to you soon.

Anson

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