From: Paul Cercueil <paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
To: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Michael Turquette
<mturquette-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>,
Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>,
Marc Zyngier <marc.zyngier-5wv7dgnIgG8@public.gmane.org>,
Daniel Lezcano
<daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
linux-clk <linux-clk-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH v2 5/6] clocksource: Add a new timer-ingenic driver
Date: Sat, 06 Jan 2018 00:48:25 +0100 [thread overview]
Message-ID: <1515196105.2058.1@smtp.crapouillou.net> (raw)
In-Reply-To: <CAL_Jsq+DQnfX29AOJWMtH9ZB7=neOVwiyZggEuwOmazzVQ6MVg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Hi Rob,
Le sam. 6 janv. 2018 à 0:27, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> a écrit :
> On Wed, Jan 3, 2018 at 3:56 PM, Paul Cercueil <paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
> wrote:
>> Hi,
>>
>> Le mer. 3 janv. 2018 à 22:08, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> a
>> écrit :
>>>
>>> On Mon, Jan 01, 2018 at 03:33:43PM +0100, Paul Cercueil wrote:
>>>>
>>>> This driver will use the TCU (Timer Counter Unit) present on the
>>>> Ingenic
>>>> JZ47xx SoCs to provide the kernel with a clocksource and timers.
>>>>
>>>> Signed-off-by: Paul Cercueil <paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
>>>> ---
>>>> .../devicetree/bindings/timer/ingenic,tcu.txt | 35 +++
>>>
>>>
>>> Separate patch please.
>>
>>
>> OK.
>>
>>
>>>> drivers/clocksource/Kconfig | 8 +
>>>> drivers/clocksource/Makefile | 1 +
>>>> drivers/clocksource/timer-ingenic.c | 256
>>>> +++++++++++++++++++++
>>>> 4 files changed, 300 insertions(+)
>>>> create mode 100644
>>>> Documentation/devicetree/bindings/timer/ingenic,tcu.txt
>>>> create mode 100644 drivers/clocksource/timer-ingenic.c
>>>>
>>>> v2: Use SPDX identifier for the license
>>>>
>>>> diff --git
>>>> a/Documentation/devicetree/bindings/timer/ingenic,tcu.txt
>>>> b/Documentation/devicetree/bindings/timer/ingenic,tcu.txt
>>>> new file mode 100644
>>>> index 000000000000..e4944972ea53
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/timer/ingenic,tcu.txt
>>>> @@ -0,0 +1,35 @@
>>>> +Ingenic JZ47xx SoCs Timer/Counter Unit driver
>>>> +---------------------------------------------
>>>> +
>>>> +Required properties:
>>>> +
>>>> +- compatible : should be "ingenic,<socname>-tcu". Valid strings
>>>> are:
>>>> + * ingenic,jz4740-tcu
>>>> + * ingenic,jz4770-tcu
>>>> + * ingenic,jz4780-tcu
>>>> +- interrupt-parent : phandle of the TCU interrupt controller.
>>>> +- interrupts : Specifies the interrupts the controller is
>>>> connected to.
>>>> +- clocks : List of phandle & clock specifiers for the TCU
>>>> clocks.
>>>> +- clock-names : List of name strings for the TCU clocks.
>>>> +- ingenic,channels: a list of TCU channels to be used as timers.
>>>
>>>
>>> Why is this needed? This looks like you are trying to assign
>>> certain
>>> timers to clocksource and clockevent. A common problem, but one
>>> that
>>> should be decided by describing h/w features. There must be some
>>> property present or missing to make you decide to use a given
>>> channel or
>>> not.
>>
>>
>> Well, it's not easy; some TCU channels will be used as PWM, and
>> there's no
>> way
>> to know that when the clocksource driver probes. And which ones are
>> PWM /
>> which
>> ones are not, is board-specific. If you have a better solution
>> though, I
>> take it.
>
> Aren't the PWMs connected to something? Describe those in DT and then
> you can find the free ones.
>
> Rob
The ingenic PWM driver just creates a PWM chip with 8 channels. Then
it's up to
the various clients (backlight, rumble...) to request a channel using
the PWM API,
from their own driver node or pdata. Besides you can also request PWM
channels
from sysfs... I can't detect all of that...
Paul
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next prev parent reply other threads:[~2018-01-05 23:48 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-29 12:59 [PATCH 0/6] Ingenic JZ47xx TCU drivers Paul Cercueil
2017-12-29 12:59 ` [PATCH 1/6] mfd: syscon: Add ingenic-tcu.h header Paul Cercueil
2018-01-01 14:33 ` [PATCH v2 " Paul Cercueil
2018-01-01 14:33 ` [PATCH v2 2/6] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2018-01-03 20:49 ` Rob Herring
2018-01-01 14:33 ` [PATCH v2 3/6] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
[not found] ` <20180101143344.2099-3-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-03 20:58 ` Rob Herring
2018-01-03 21:50 ` Paul Cercueil
2018-01-01 14:33 ` [PATCH v2 4/6] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
2018-01-02 19:13 ` Stephen Boyd
2018-01-02 20:08 ` Paul Cercueil
2018-01-02 22:59 ` Stephen Boyd
2018-01-01 14:33 ` [PATCH v2 5/6] clocksource: Add a new timer-ingenic driver Paul Cercueil
2018-01-03 21:08 ` Rob Herring
2018-01-03 21:56 ` Paul Cercueil
[not found] ` <1515016576.1642.2-nb6JAIIttxhEPksTRSfcJOTW4wlIGRCZ@public.gmane.org>
2018-01-05 23:27 ` Rob Herring
[not found] ` <CAL_Jsq+DQnfX29AOJWMtH9ZB7=neOVwiyZggEuwOmazzVQ6MVg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-05 23:48 ` Paul Cercueil [this message]
[not found] ` <1515196105.2058.1-nb6JAIIttxhEPksTRSfcJOTW4wlIGRCZ@public.gmane.org>
2018-01-09 1:09 ` Rob Herring
2018-01-01 14:33 ` [PATCH v2 6/6] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
2018-01-02 15:51 ` [PATCH v2 1/6] mfd: syscon: Add ingenic-tcu.h header Lee Jones
2018-01-10 22:48 ` [PATCH v3 1/9] " Paul Cercueil
2018-01-10 22:48 ` [PATCH v3 3/9] doc: dt-bindings: Add doc for Ingenic TCU IRQ driver Paul Cercueil
[not found] ` <20180110224838.16711-3-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-19 21:05 ` Rob Herring
2018-01-10 22:48 ` [PATCH v3 4/9] doc: dt-bindings: Add doc for the Ingenic TCU clocks driver Paul Cercueil
[not found] ` <20180110224838.16711-4-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-19 21:11 ` Rob Herring
2018-01-10 22:48 ` [PATCH v3 5/9] doc: dt-bindings: Add doc for the Ingenic TCU timers driver Paul Cercueil
2018-01-19 21:12 ` Rob Herring
2018-01-10 22:48 ` [PATCH v3 6/9] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
[not found] ` <20180110224838.16711-6-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-11 15:38 ` Marc Zyngier
2018-01-11 16:25 ` Paul Cercueil
2018-01-20 13:06 ` Marc Zyngier
2018-01-22 9:26 ` Lee Jones
2018-01-22 9:55 ` Marc Zyngier
[not found] ` <bdae1be4-0ed2-1b7d-8b08-7439ce06e762-5wv7dgnIgG8@public.gmane.org>
2018-01-22 11:46 ` Lee Jones
2018-01-10 22:48 ` [PATCH v3 7/9] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
[not found] ` <20180110224838.16711-7-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-27 0:37 ` Stephen Boyd
2018-01-10 22:48 ` [PATCH v3 8/9] clocksource: Add a new timer-ingenic driver Paul Cercueil
[not found] ` <20180110224838.16711-8-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-11 14:53 ` Rob Herring
[not found] ` <CAL_Jsq+StZS1+qTd9CG1X2_3ay5onMgEmYG9MRUVWs-4K4-EZA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-11 16:16 ` Paul Cercueil
2018-01-10 22:48 ` [PATCH v3 9/9] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
[not found] ` <20180110224838.16711-1-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-10 22:48 ` [PATCH v3 2/9] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 1/8] mfd: syscon: Add ingenic-tcu.h header Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 2/8] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2018-03-19 21:27 ` Stephen Boyd
2018-03-20 7:15 ` Mathieu Malaterre
2018-03-28 15:04 ` [PATCH v4 2/8] dt-bindings: ingenic: Add DT bindings for TCU clocks, Paul Cercueil
2018-03-28 18:35 ` [PATCH v4 2/8] dt-bindings: ingenic: Add DT bindings for TCU clocks Mathieu Malaterre
2018-03-17 23:28 ` [PATCH v4 3/8] doc: Add doc for the Ingenic TCU hardware Paul Cercueil
2018-03-17 23:52 ` Randy Dunlap
2018-03-28 14:59 ` [PATCH v4 3/8] doc: Add doc for the Ingenic TCU hardware, Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers Paul Cercueil
2018-03-20 8:52 ` Marc Zyngier
2018-03-28 15:09 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers, Paul Cercueil
2018-03-27 14:46 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers Rob Herring
2018-03-28 15:33 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers, Paul Cercueil
2018-03-28 16:28 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers Rob Herring
2018-03-29 15:59 ` Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 5/8] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 6/8] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
2018-03-17 23:29 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver Paul Cercueil
2018-03-24 6:26 ` Daniel Lezcano
2018-03-28 15:15 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver, Paul Cercueil
2018-03-28 16:25 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver Daniel Lezcano
2018-03-29 14:52 ` Paul Cercueil
2018-03-31 8:10 ` Daniel Lezcano
2018-03-31 17:46 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver, Paul Cercueil
2018-04-03 9:59 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver Daniel Lezcano
2018-03-17 23:29 ` [PATCH v4 8/8] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
2018-03-18 22:13 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers Daniel Lezcano
2018-03-28 15:01 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers, Paul Cercueil
2018-03-28 15:10 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers Daniel Lezcano
2018-01-23 9:52 ` [PATCH v3 1/9] mfd: syscon: Add ingenic-tcu.h header Lee Jones
2017-12-29 12:59 ` [PATCH 2/6] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2017-12-29 12:59 ` [PATCH 3/6] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
2017-12-29 12:59 ` [PATCH 4/6] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
2017-12-29 14:02 ` Paul Cercueil
2018-01-01 12:47 ` kbuild test robot
2017-12-29 12:59 ` [PATCH 5/6] clocksource: Add a new timer-ingenic driver Paul Cercueil
2017-12-29 12:59 ` [PATCH 6/6] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
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