From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Chen-Yu Tsai <wens@csie.org>
Cc: Mark Brown <broonie@kernel.org>, Lee Jones <lee.jones@linaro.org>,
Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@free-electrons.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
rtc-linux@googlegroups.com,
linux-kernel <linux-kernel@vger.kernel.org>,
devicetree <devicetree@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-clk <linux-clk@vger.kernel.org>
Subject: Re: [PATCH v3 5/8] rtc: ac100: Add clk output support
Date: Mon, 27 Jun 2016 21:23:21 +0200 [thread overview]
Message-ID: <20160627192321.GX4000@lukather> (raw)
In-Reply-To: <CAGb2v67DVBZbRb2PWLP8WurPaNin=2Fa=HMAEK_PdBeqv1x+8Q@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1223 bytes --]
On Wed, Jun 22, 2016 at 06:11:55PM +0800, Chen-Yu Tsai wrote:
> On Wed, Jun 22, 2016 at 6:02 PM, Maxime Ripard
> <maxime.ripard@free-electrons.com> wrote:
> > Hi,
> >
> > On Mon, Jun 20, 2016 at 10:52:15AM +0800, Chen-Yu Tsai wrote:
> >> + /*
> >> + * The ADDA 4 MHz clock is from the codec side of the AC100,
> >> + * which is likely a different power domain. However, boards
> >> + * always have both sides powered on, so it is impossible to
> >> + * test this.
> >> + */
> >
> > If that ADDA clock is exposed by the codec, why are you putting it in
> > the RTC?
>
> The thing is it's not entirely clear that it's from the codec side.
> I'm just inferring this from the name. (I'll make the comment clearer.)
> The codec parts of the datasheet don't mention this clock at all.
>
> Allwinner's SDK puts all the clocks under the RTC module. And the
> are always on, so I can't really turn off the codec and see what
> happens. That and I don't have an oscilloscope or logic analyzer.
Why not just create a separate clock driver then?
Thanks,
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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WARNING: multiple messages have this Message-ID (diff)
From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Chen-Yu Tsai <wens@csie.org>
Cc: Mark Brown <broonie@kernel.org>, Lee Jones <lee.jones@linaro.org>,
Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@free-electrons.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
rtc-linux@googlegroups.com,
linux-kernel <linux-kernel@vger.kernel.org>,
devicetree <devicetree@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-clk <linux-clk@vger.kernel.org>
Subject: [rtc-linux] Re: [PATCH v3 5/8] rtc: ac100: Add clk output support
Date: Mon, 27 Jun 2016 21:23:21 +0200 [thread overview]
Message-ID: <20160627192321.GX4000@lukather> (raw)
In-Reply-To: <CAGb2v67DVBZbRb2PWLP8WurPaNin=2Fa=HMAEK_PdBeqv1x+8Q@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1705 bytes --]
On Wed, Jun 22, 2016 at 06:11:55PM +0800, Chen-Yu Tsai wrote:
> On Wed, Jun 22, 2016 at 6:02 PM, Maxime Ripard
> <maxime.ripard@free-electrons.com> wrote:
> > Hi,
> >
> > On Mon, Jun 20, 2016 at 10:52:15AM +0800, Chen-Yu Tsai wrote:
> >> + /*
> >> + * The ADDA 4 MHz clock is from the codec side of the AC100,
> >> + * which is likely a different power domain. However, boards
> >> + * always have both sides powered on, so it is impossible to
> >> + * test this.
> >> + */
> >
> > If that ADDA clock is exposed by the codec, why are you putting it in
> > the RTC?
>
> The thing is it's not entirely clear that it's from the codec side.
> I'm just inferring this from the name. (I'll make the comment clearer.)
> The codec parts of the datasheet don't mention this clock at all.
>
> Allwinner's SDK puts all the clocks under the RTC module. And the
> are always on, so I can't really turn off the codec and see what
> happens. That and I don't have an oscilloscope or logic analyzer.
Why not just create a separate clock driver then?
Thanks,
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
--
You received this message because you are subscribed to "rtc-linux".
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Please read http://groups.google.com/group/rtc-linux/web/checklist
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WARNING: multiple messages have this Message-ID (diff)
From: maxime.ripard@free-electrons.com (Maxime Ripard)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 5/8] rtc: ac100: Add clk output support
Date: Mon, 27 Jun 2016 21:23:21 +0200 [thread overview]
Message-ID: <20160627192321.GX4000@lukather> (raw)
In-Reply-To: <CAGb2v67DVBZbRb2PWLP8WurPaNin=2Fa=HMAEK_PdBeqv1x+8Q@mail.gmail.com>
On Wed, Jun 22, 2016 at 06:11:55PM +0800, Chen-Yu Tsai wrote:
> On Wed, Jun 22, 2016 at 6:02 PM, Maxime Ripard
> <maxime.ripard@free-electrons.com> wrote:
> > Hi,
> >
> > On Mon, Jun 20, 2016 at 10:52:15AM +0800, Chen-Yu Tsai wrote:
> >> + /*
> >> + * The ADDA 4 MHz clock is from the codec side of the AC100,
> >> + * which is likely a different power domain. However, boards
> >> + * always have both sides powered on, so it is impossible to
> >> + * test this.
> >> + */
> >
> > If that ADDA clock is exposed by the codec, why are you putting it in
> > the RTC?
>
> The thing is it's not entirely clear that it's from the codec side.
> I'm just inferring this from the name. (I'll make the comment clearer.)
> The codec parts of the datasheet don't mention this clock at all.
>
> Allwinner's SDK puts all the clocks under the RTC module. And the
> are always on, so I can't really turn off the codec and see what
> happens. That and I don't have an oscilloscope or logic analyzer.
Why not just create a separate clock driver then?
Thanks,
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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WARNING: multiple messages have this Message-ID (diff)
From: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Alessandro Zummo
<a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org>,
Alexandre Belloni
<alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Ian Campbell
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Michael Turquette
<mturquette-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>,
Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org,
linux-kernel
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-arm-kernel
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
linux-clk <linux-clk-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH v3 5/8] rtc: ac100: Add clk output support
Date: Mon, 27 Jun 2016 21:23:21 +0200 [thread overview]
Message-ID: <20160627192321.GX4000@lukather> (raw)
In-Reply-To: <CAGb2v67DVBZbRb2PWLP8WurPaNin=2Fa=HMAEK_PdBeqv1x+8Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 1768 bytes --]
On Wed, Jun 22, 2016 at 06:11:55PM +0800, Chen-Yu Tsai wrote:
> On Wed, Jun 22, 2016 at 6:02 PM, Maxime Ripard
> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> > Hi,
> >
> > On Mon, Jun 20, 2016 at 10:52:15AM +0800, Chen-Yu Tsai wrote:
> >> + /*
> >> + * The ADDA 4 MHz clock is from the codec side of the AC100,
> >> + * which is likely a different power domain. However, boards
> >> + * always have both sides powered on, so it is impossible to
> >> + * test this.
> >> + */
> >
> > If that ADDA clock is exposed by the codec, why are you putting it in
> > the RTC?
>
> The thing is it's not entirely clear that it's from the codec side.
> I'm just inferring this from the name. (I'll make the comment clearer.)
> The codec parts of the datasheet don't mention this clock at all.
>
> Allwinner's SDK puts all the clocks under the RTC module. And the
> are always on, so I can't really turn off the codec and see what
> happens. That and I don't have an oscilloscope or logic analyzer.
Why not just create a separate clock driver then?
Thanks,
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
--
You received this message because you are subscribed to "rtc-linux".
Membership options at http://groups.google.com/group/rtc-linux .
Please read http://groups.google.com/group/rtc-linux/web/checklist
before submitting a driver.
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To unsubscribe from this group and stop receiving emails from it, send an email to rtc-linux+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
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next prev parent reply other threads:[~2016-06-27 19:23 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-20 2:52 [PATCH v3 0/8] mfd: ac100: Add support for X-Powers AC100 audio codec / RTC combo IC Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-20 2:52 ` [PATCH v3 1/8] regmap: Support bulk writes for devices without raw formatting Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-20 2:52 ` [PATCH v3 2/8] mfd: ac100: Add device tree bindings for X-Powers AC100 codec/RTC combo IC Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-21 13:14 ` Rob Herring
2016-06-21 13:14 ` Rob Herring
2016-06-21 13:14 ` Rob Herring
2016-06-21 13:14 ` [rtc-linux] " Rob Herring
2016-06-22 4:16 ` Chen-Yu Tsai
2016-06-22 4:16 ` Chen-Yu Tsai
2016-06-22 4:16 ` Chen-Yu Tsai
2016-06-22 4:16 ` [rtc-linux] " Chen-Yu Tsai
2016-06-20 2:52 ` [PATCH v3 3/8] mfd: ac100: Add driver for X-Powers AC100 audio codec / RTC " Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-20 2:52 ` [PATCH v3 4/8] rtc: ac100: Add RTC driver for X-Powers AC100 Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-26 0:30 ` Alexandre Belloni
2016-06-26 0:30 ` Alexandre Belloni
2016-06-26 0:30 ` Alexandre Belloni
2016-06-26 0:30 ` [rtc-linux] " Alexandre Belloni
2016-06-26 14:54 ` Chen-Yu Tsai
2016-06-26 14:54 ` Chen-Yu Tsai
2016-06-26 14:54 ` Chen-Yu Tsai
2016-06-26 14:54 ` [rtc-linux] " Chen-Yu Tsai
2016-06-26 1:02 ` Alexandre Belloni
2016-06-26 1:02 ` Alexandre Belloni
2016-06-26 1:02 ` Alexandre Belloni
2016-06-26 1:02 ` [rtc-linux] " Alexandre Belloni
2016-06-20 2:52 ` [PATCH v3 5/8] rtc: ac100: Add clk output support Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-22 10:02 ` Maxime Ripard
2016-06-22 10:02 ` Maxime Ripard
2016-06-22 10:02 ` Maxime Ripard
2016-06-22 10:02 ` [rtc-linux] " Maxime Ripard
2016-06-22 10:11 ` Chen-Yu Tsai
2016-06-22 10:11 ` Chen-Yu Tsai
2016-06-22 10:11 ` Chen-Yu Tsai
2016-06-22 10:11 ` [rtc-linux] " Chen-Yu Tsai
2016-06-27 19:23 ` Maxime Ripard [this message]
2016-06-27 19:23 ` Maxime Ripard
2016-06-27 19:23 ` Maxime Ripard
2016-06-27 19:23 ` [rtc-linux] " Maxime Ripard
2016-06-28 2:27 ` Chen-Yu Tsai
2016-06-28 2:27 ` Chen-Yu Tsai
2016-06-28 2:27 ` Chen-Yu Tsai
2016-06-28 2:27 ` [rtc-linux] " Chen-Yu Tsai
2016-06-26 0:45 ` Alexandre Belloni
2016-06-26 0:45 ` Alexandre Belloni
2016-06-26 0:45 ` Alexandre Belloni
2016-06-26 0:45 ` [rtc-linux] " Alexandre Belloni
2016-06-26 14:58 ` Chen-Yu Tsai
2016-06-26 14:58 ` Chen-Yu Tsai
2016-06-26 14:58 ` [rtc-linux] " Chen-Yu Tsai
2016-06-20 2:52 ` [PATCH v3 6/8] ARM: dts: sun9i: a80-optimus: Add device node for AC100 Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-20 2:52 ` [PATCH v3 7/8] ARM: dts: sun9i: cubieboard4: " Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
2016-06-20 2:52 ` [PATCH v3 8/8] ARM: dts: sun9i: Switch to the AC100 RTC clock outputs for osc32k Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` Chen-Yu Tsai
2016-06-20 2:52 ` [rtc-linux] " Chen-Yu Tsai
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