From: Stephen Boyd <sboyd@kernel.org>
To: Paul Cercueil <paul@crapouillou.net>
Cc: Guenter Roeck <linux@roeck-us.net>,
Mathieu Malaterre <malat@debian.org>,
Thierry Reding <thierry.reding@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ralf Baechle <ralf@linux-mips.org>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
Ezequiel Garcia <ezequiel@collabora.co.uk>,
PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>,
linux-pwm@vger.kernel.org,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
linux-watchdog@vger.kernel.org, linux-mips@vger.kernel.org,
linux-doc@vger.kernel.org, linux-clk@vger.kernel.org, od@zcrc.me,
Maarten ter Huurne <maarten@treewalker.org>
Subject: Re: [PATCH v8 05/26] clocksource: Add driver for the Ingenic JZ47xx OST
Date: Thu, 24 Jan 2019 14:46:20 -0800 [thread overview]
Message-ID: <154836998080.136743.17683029101430122926@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <1548362788.3881.0@crapouillou.net>
Quoting Paul Cercueil (2019-01-24 12:46:28)
>
>
> Le jeu. 24 janv. 2019 à 16:28, Stephen Boyd <sboyd@kernel.org> a
> écrit :
> > Quoting Guenter Roeck (2019-01-23 10:01:55)
> >> On Wed, Jan 23, 2019 at 02:25:53PM -0300, Paul Cercueil wrote:
> >> > Hi,
> >> >
> >> > Le mer. 23 janv. 2019 Ã 11:31, Guenter Roeck
> >> <linux@roeck-us.net> a écrit :
> >> > >On 1/23/19 4:58 AM, Mathieu Malaterre wrote:
> >> > >>On Wed, Dec 12, 2018 at 11:09 PM Paul Cercueil
> >> <paul@crapouillou.net>
> >> > >>wrote:
> >> > >>>
> >> > >>>From: Maarten ter Huurne <maarten@treewalker.org>
> >> > >>>
> >> > >>>OST is the OS Timer, a 64-bit timer/counter with buffered
> >> reading.
> >> > >>>
> >> > >>>SoCs before the JZ4770 had (if any) a 32-bit OST; the JZ4770
> >> and
> >> > >>>JZ4780 have a 64-bit OST.
> >> > >>>
> >> > >>>This driver will register both a clocksource and a sched_clock
> >> to the
> >> > >>>system.
> >> > >>>
> >> > >>>Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
> >> > >>>Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> >> > >>>---
> >> > >>>
> >> > >>>Notes:
> >> > >>> v5: New patch
> >> > >>>
> >> > >>> v6: - Get rid of SoC IDs; pass pointer to
> >> ingenic_ost_soc_info
> >> > >>>as
> >> > >>> devicetree match data instead.
> >> > >>> - Use device_get_match_data() instead of the of_*
> >> variant
> >> > >>> - Handle error of dev_get_regmap() properly
> >> > >>>
> >> > >>> v7: Fix section mismatch by using
> >> > >>>builtin_platform_driver_probe()
> >> > >>>
> >> > >>> v8: builtin_platform_driver_probe() does not work
> >> anymore in
> >> > >>> 4.20-rc6? The probe function won't be called. Work
> >> around
> >> > >>>this
> >> > >>> for now by using late_initcall.
> >> > >>>
> >> > >
> >> > >Did anyone notice this ? Either something is wrong with the
> >> driver, or
> >> > >with the kernel core. Hacking around it seems like the worst
> >> possible
> >> > >"solution".
> >> >
> >> > I can confirm it still happens on 5.0-rc3.
> >> >
> >> > Just to explain what I'm doing:
> >> >
> >> > My ingenic-timer driver probes with builtin_platform_driver_probe
> >> (this
> >> > works),
> >> > and then calls of_platform_populate to probe its children. This
> >> driver,
> >> > ingenic-ost, is one of them, and will fail to probe with
> >> > builtin_platform_driver_probe.
> >> >
> >>
> >> The big question is _why_ it fails to probe.
> >>
> >
> > Are you sharing the device tree node between a 'normal' platform
> > device
> > driver and something more low level DT that marks the device's backing
> > DT node as OF_POPULATED early on? That's my only guess why it's not
> > working.
>
> I do, but I clear the OF_POPULATED flag so that it is then probed as a
> normal platform device, and it's not on this driver's node but its
> parent.
>
Where do you clear the OF_POPULATED flag?
next prev parent reply other threads:[~2019-01-24 22:46 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-12 22:08 [PATCH v8 00/26] Ingenic TCU patchset v8 Paul Cercueil
2018-12-12 22:08 ` [PATCH v8 01/26] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2018-12-17 23:18 ` Stephen Boyd
2018-12-12 22:08 ` [PATCH v8 02/26] doc: Add doc for the Ingenic TCU hardware Paul Cercueil
2018-12-12 22:08 ` [PATCH v8 03/26] dt-bindings: Add doc for the Ingenic TCU drivers Paul Cercueil
2018-12-17 21:05 ` Rob Herring
2018-12-17 22:03 ` Paul Cercueil
2018-12-18 16:36 ` Rob Herring
2018-12-22 11:09 ` Paul Cercueil
2018-12-12 22:08 ` [PATCH v8 04/26] clocksource: Add a new timer-ingenic driver Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 05/26] clocksource: Add driver for the Ingenic JZ47xx OST Paul Cercueil
2019-01-23 12:58 ` Mathieu Malaterre
2019-01-23 14:31 ` Guenter Roeck
2019-01-23 17:25 ` Paul Cercueil
2019-01-23 18:01 ` Guenter Roeck
2019-01-24 19:28 ` Stephen Boyd
2019-01-24 20:46 ` Paul Cercueil
2019-01-24 22:46 ` Stephen Boyd [this message]
2019-01-24 22:53 ` Paul Cercueil
2019-02-23 3:17 ` Paul Cercueil
2019-02-25 18:05 ` Stephen Boyd
2019-02-27 23:54 ` Paul Cercueil
2019-01-23 17:27 ` Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 06/26] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 07/26] watchdog: jz4740: Use WDT clock provided by TCU driver Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 08/26] watchdog: jz4740: Use regmap " Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 09/26] watchdog: jz4740: Avoid starting watchdog in set_timeout Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 10/26] watchdog: jz4740: Drop dependency on MACH_JZ47xx, use COMPILE_TEST Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 11/26] pwm: jz4740: Use regmap and clocks from TCU driver Paul Cercueil
2018-12-13 9:30 ` Uwe Kleine-König
2018-12-13 14:34 ` Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 12/26] pwm: jz4740: Allow selection of PWM channels 0 and 1 Paul Cercueil
2018-12-13 9:18 ` Uwe Kleine-König
2018-12-13 13:58 ` Paul Cercueil
2018-12-13 20:32 ` Uwe Kleine-König
2018-12-16 13:36 ` Paul Cercueil
2018-12-17 7:43 ` Uwe Kleine-König
2018-12-12 22:09 ` [PATCH v8 13/26] pwm: jz4740: Drop dependency on MACH_INGENIC, use COMPILE_TEST Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 14/26] pwm: jz4740: Remove unused devicetree compatible strings Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 15/26] pwm: jz4740: Add support for the JZ4725B Paul Cercueil
2018-12-13 9:24 ` Uwe Kleine-König
2018-12-13 14:03 ` Paul Cercueil
2018-12-13 16:18 ` Thierry Reding
2018-12-13 20:42 ` Uwe Kleine-König
2018-12-14 13:50 ` Linus Walleij
2018-12-14 14:26 ` Uwe Kleine-König
2018-12-14 14:56 ` Linus Walleij
2018-12-16 14:18 ` Paul Cercueil
2018-12-17 7:53 ` Uwe Kleine-König
2018-12-20 17:39 ` Thierry Reding
2018-12-20 20:58 ` Uwe Kleine-König
2018-12-12 22:09 ` [PATCH v8 16/26] clk: jz4740: Add TCU clock Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 17/26] MIPS: Kconfig: Select TCU timer driver when MACH_INGENIC is set Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 18/26] MIPS: jz4740: Add DTS nodes for the TCU drivers Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 19/26] MIPS: qi_lb60: Move PWM devices to devicetree Paul Cercueil
2018-12-12 22:09 ` [PATCH v8 20/26] MIPS: qi_lb60: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2018-12-12 22:12 ` [PATCH v8 21/26] MIPS: CI20: Reduce system timer and clocksource to 3 MHz Paul Cercueil
2018-12-12 22:12 ` [PATCH v8 22/26] MIPS: CI20: defconfig: enable OST driver Paul Cercueil
2018-12-12 22:13 ` [PATCH v8 23/26] MIPS: GCW0: Move clocksource to TCU channel 2 Paul Cercueil
2018-12-12 22:13 ` [PATCH v8 24/26] MIPS: GCW0: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2018-12-12 22:14 ` [PATCH v8 25/26] MIPS: GCW0: defconfig: Enable OST, watchdog, PWM drivers Paul Cercueil
2018-12-12 22:15 ` [PATCH v8 26/26] MIPS: jz4740: Drop obsolete code Paul Cercueil
2019-01-24 21:26 ` [PATCH v8 00/26] Ingenic TCU patchset v8 Mathieu Malaterre
2019-01-24 21:41 ` Paul Cercueil
2019-01-25 8:21 ` Mathieu Malaterre
2019-01-25 17:04 ` Paul Cercueil
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