From: grygorii.strashko@ti•com (Grygorii Strashko)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v3 01/18] platform: delay OF device-driver matches until late_initcall
Date: Fri, 7 Aug 2015 20:06:31 +0300 [thread overview]
Message-ID: <55C4E597.1010701@ti.com> (raw)
In-Reply-To: <CAAObsKBapFqzr+4YEXJfcJWMd+tkaBqYbGiFTntHStAP=+P-_Q@mail.gmail.com>
On 08/07/2015 10:11 AM, Tomeu Vizoso wrote:
> On 6 August 2015 at 22:19, Rob Herring <robherring2@gmail•com> wrote:
>> On Thu, Aug 6, 2015 at 9:11 AM, Tomeu Vizoso <tomeu.vizoso@collabora•com> wrote:
>>> Delay matches of platform devices with OF nodes until late_initcall,
>>> when we are sure that all built-in drivers have been registered already.
>>> This is needed to prevent deferred probes because of some drivers not
>>> having registered yet.
>>>
>>> The reason why only platform devices are delayed is that some other
>>> devices are expected to be probed earlier than late_initcall, for
>>> example, the system PNP driver needs to probe its devices in
>>> fs_initcall.
>>>
>>> Additionally, only platform devices with OF nodes are delayed because
>>> some machines may depend on oter platform devices being registered at
>>> specific times.
>>
>> How do we know that these probes occur before the unused clocks and
>> regulators are turned off? Just getting lucky (as is deferred probe)?
>> Can we do this one level earlier so we have a level left to do things
>> after probe.
>
> Those are already late_initcall_sync so I guess we're fine.
I wouldn't be so sure :(
FYI:
http://git.ti.com/ti-linux-kernel/ti-linux-kernel/commit/763d643bbfc0f445c6685c541fcae3c370e4314a
--
regards,
-grygorii
next prev parent reply other threads:[~2015-08-07 17:06 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-06 14:11 [PATCH v3 0/18] On-demand device probing Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 01/18] platform: delay OF device-driver matches until late_initcall Tomeu Vizoso
2015-08-06 20:19 ` Rob Herring
2015-08-07 7:11 ` Tomeu Vizoso
2015-08-07 17:06 ` Grygorii Strashko [this message]
2015-08-09 13:03 ` Tomeu Vizoso
2015-08-10 10:25 ` Mark Brown
2015-09-04 5:46 ` Tomeu Vizoso
2015-08-14 19:09 ` Grygorii Strashko
2015-09-04 8:05 ` Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 02/18] of/platform: add of_platform_probe Tomeu Vizoso
2015-08-07 12:19 ` Mark Brown
2015-08-11 9:37 ` Tomeu Vizoso
2015-09-07 12:31 ` Tomeu Vizoso
2015-09-11 9:57 ` Mark Brown
2015-09-11 14:06 ` Tomeu Vizoso
2015-09-11 15:35 ` Mark Brown
2015-09-15 13:08 ` Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 03/18] gpio: Probe GPIO drivers on demand Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 04/18] gpio: Probe pinctrl devices " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 05/18] regulator: core: Reduce critical area in _regulator_get Tomeu Vizoso
2015-08-07 12:07 ` Mark Brown
2015-08-06 14:11 ` [PATCH v3 06/18] regulator: core: Probe regulators on demand Tomeu Vizoso
2015-08-07 12:09 ` Mark Brown
2015-08-07 13:58 ` Rob Herring
2015-08-06 14:11 ` [PATCH v3 07/18] drm: Probe panels " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 08/18] drm/tegra: Probe dpaux devices " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 09/18] i2c: core: Probe i2c adapters and " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 10/18] pwm: Probe PWM chip " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 11/18] backlight: Probe backlight " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 12/18] usb: phy: Probe phy " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 13/18] clk: Probe clk providers " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 14/18] pinctrl: Probe pinctrl devices " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 15/18] phy: core: Probe phy providers " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 16/18] dma: of: Probe DMA controllers " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 17/18] power-supply: Probe power supplies " Tomeu Vizoso
2015-08-06 14:11 ` [PATCH v3 18/18] ASoC: core: Probe components " Tomeu Vizoso
2015-08-06 20:14 ` [PATCH v3 0/18] On-demand device probing Rob Herring
2015-08-07 6:55 ` Tomeu Vizoso
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