From: Zhang Rui <rui.zhang@intel.com>
To: Anson Huang <anson.huang@nxp.com>,
Leonard Crestez <leonard.crestez@nxp.com>,
Shawn Guo <shawnguo@kernel.org>
Cc: Eduardo Valentin <edubezval@gmail.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
dl-linux-imx <linux-imx@nxp.com>, Stephen Boyd <sboyd@kernel.org>,
Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: Re: [PATCH V3 1/5] thermal: qoriq: Add clock operations
Date: Thu, 29 Aug 2019 11:01:28 +0800 [thread overview]
Message-ID: <678b4418be67c76cf1505f0fec69e25ecd0110f5.camel@intel.com> (raw)
In-Reply-To: <DB3PR0402MB3916372A08E2FF3A9C15E0A6F5A20@DB3PR0402MB3916.eurprd04.prod.outlook.com>
On Thu, 2019-08-29 at 02:49 +0000, Anson Huang wrote:
> Hi, Rui
>
> > > On Wed, 2019-08-28 at 08:51 +0000, Anson Huang wrote:
> > > > Hi, Rui
> > > >
> > > > > On Tue, 2019-08-27 at 12:41 +0000, Leonard Crestez wrote:
> > > > > > On 27.08.2019 04:51, Anson Huang wrote:
> > > > > > > > In an earlier series the CLK_IS_CRITICAL flags was
> > > > > > > > removed
> > > > > > > > from the TMU clock so if the thermal driver doesn't
> > > > > > > > explicitly enable it the system will hang on probe.
> > > > > > > > This is
> > > > > > > > what happens in linux-next right now!
> > > > > > >
> > > > > > > The thermal driver should be built with module, so
> > > > > > > default
> > > > > > > kernel should can boot up, do you modify the thermal
> > > > > > > driver as
> > > > > > > built- in?
> > > > > > >
> > > > > > > > Unless this patches is merged soon we'll end up with a
> > > > > > > > 5.4-
> > > > > > > > rc1
> > > > > > > > that doesn't boot on imx8mq. An easy fix would be to
> > > > > > > > drop/revert commit
> > > > > > > > 951c1aef9691 ("clk: imx8mq: Remove CLK_IS_CRITICAL flag
> > > > > > > > for
> > > > > > > > IMX8MQ_CLK_TMU_ROOT") until the thermal patches are
> >
> > accepted.
> > > > > > >
> > > > > > > If the thermal driver is built as module, I think no need
> > > > > > > to
> > > > > > > revert the commit, but if by default thermal driver is
> > > > > > > built-in or mod probed, then yes, it should NOT break
> > > > > > > kernel boot
> >
> > up.
> > > > > >
> > > > > > The qoriq_thermal driver is built as a module in defconfig
> > > > > > and
> > > > > > when modules are properly installed in rootfs they will be
> > > > > > automatically be probed on boot and cause a hang.
> > > > > >
> > > > > > I usually run nfsroot with modules:
> > > > > >
> > > > > > make modules_install INSTALL_MOD_PATH=/srv/nfs/imx8-
> > > > > > root
> > > > >
> > > > > so we need this patch shipped in the beginning of the merge
> > > > > window, right?
> > > > > if there is hard dependency between patches, it's better to
> > > > > send
> > > > > them in one series, and get shipped via either tree.
> > > >
> > > > There is no hard dependency in this patch series. Previous for
> > > > the
> > > > TMU clock disabled patch, since thermal driver is built as
> > > > module so
> > > > I did NOT found the issue. The patch series is the correct fix.
> > > >
> > >
> > > Got it.
> > > the clock patch is also queued for 5.4-rc1, right?
> > > I will apply this series and try to push it as early as possible
> > > during the merge window.
> >
> > The clock patch is as below in Linux-next tree, while I did NOT see
> > it in v5.3-
> > rc6, so it should be queued for 5.4-rc1, right?
> > Thanks for taking the patch series!
>
> Sorry for pushing, so you will apply this patch series to avoid the
> i.MX8MQ kernel boot up hang
> caused by insmod qoriq thermal driver, right? Then we no need to
> revert that TMU clock patch
> 951c1aef9691 ("clk: imx8mq: Remove CLK_IS_CRITICAL flag for
> IMX8MQ_CLK_TMU_ROOT").
>
right. I will queue it for 5.4-rc1.
thanks,
rui
> Thanks,
> Anson
>
> >
> >
> > commit 951c1aef9691491ddf4dd5aab76f2665d56bd5d3
> > Author: Anson Huang <Anson.Huang@nxp.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.
> >
> > Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> > Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
> > Acked-by: Stephen Boyd <sboyd@kernel.org>
> > Signed-off-by: Shawn Guo <shawnguo@kernel.org>
> >
> > drivers/clk/imx/clk-imx8mq.c
> >
> >
> > Thanks,
> > Anson
prev parent reply other threads:[~2019-08-29 3:01 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 2:21 [PATCH V3 1/5] thermal: qoriq: Add clock operations Anson.Huang
2019-07-30 2:21 ` [PATCH V3 2/5] thermal: qoriq: Fix error path of calling qoriq_tmu_register_tmu_zone fail Anson.Huang
2019-08-05 7:01 ` Aisheng Dong
2019-07-30 2:21 ` [PATCH V3 3/5] thermal: qoriq: Use devm_platform_ioremap_resource() instead of of_iomap() Anson.Huang
2019-08-05 7:01 ` Aisheng Dong
2019-07-30 2:21 ` [PATCH V3 4/5] thermal: qoriq: Use __maybe_unused instead of #if CONFIG_PM_SLEEP Anson.Huang
2019-08-05 7:02 ` Aisheng Dong
2019-07-30 2:21 ` [PATCH V3 5/5] dt-bindings: thermal: qoriq: Add optional clocks property Anson.Huang
2019-08-05 7:02 ` Aisheng Dong
2019-08-05 7:00 ` [PATCH V3 1/5] thermal: qoriq: Add clock operations Aisheng Dong
2019-08-26 14:45 ` Leonard Crestez
2019-08-27 1:51 ` Anson Huang
2019-08-27 3:09 ` Zhang Rui
2019-08-27 3:24 ` Anson Huang
2019-08-27 12:41 ` Leonard Crestez
2019-08-28 8:32 ` Zhang Rui
2019-08-28 8:35 ` Zhang Rui
2019-08-28 8:49 ` Anson Huang
2019-08-28 9:01 ` Zhang Rui
2019-08-28 9:12 ` Anson Huang
2019-08-28 8:51 ` Anson Huang
2019-08-28 9:03 ` Zhang Rui
2019-08-28 9:10 ` Anson Huang
2019-08-29 2:49 ` Anson Huang
2019-08-29 3:01 ` Zhang Rui [this message]
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