From: Stanley Chu <stanley.chu@mediatek.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Rob Herring <robh+dt@kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-mediatek@lists.infradead.org>,
<devicetree@vger.kernel.org>, <wsd_upstream@mediatek.com>
Subject: Re: [PATCH 1/2] dt-bindings: Add mtk-systimer bindings
Date: Tue, 26 Jun 2018 14:36:24 +0800 [thread overview]
Message-ID: <1529994984.17448.27.camel@mtkswgap22> (raw)
In-Reply-To: <ad38a952-4400-984a-a7fd-aa4e6af13c13@linaro.org>
On Mon, 2018-06-25 at 23:53 +0200, Daniel Lezcano wrote:
> On 25/06/2018 09:10, Stanley Chu wrote:
> > Add binding documentation for the System Timer driver of
> > the Mediatek SoCs.
> >
> > Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
> > ---
> > .../bindings/timer/mediatek,mtk-systimer.txt | 18 ++++++++++++++++++
> > 1 file changed, 18 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/timer/mediatek,mtk-systimer.txt
> >
> > diff --git a/Documentation/devicetree/bindings/timer/mediatek,mtk-systimer.txt b/Documentation/devicetree/bindings/timer/mediatek,mtk-systimer.txt
> > new file mode 100644
> > index 0000000..735a6fd
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/timer/mediatek,mtk-systimer.txt
> > @@ -0,0 +1,18 @@
> > +Mediatek System Timers
> > +----------------------
> > +
> > +Required properties:
> > +- compatible: should contain
> > + "mediatek,sys_timer" for those platforms which support system timer.
> > +- reg: Mandatory. The location and length for system timer registers.
> > +- clock-frequency: Optional. If not assigned specifically, default
> > + value 13000000 (means 13 MHz) would be applied.
>
> The driver tells there is an error if it is not defined, so it can't be
> optional.
>
> > +Examples:
> > +
> > + sys_timer@10017000 {
> > + compatible = "mediatek,sys_timer";
> > + reg = <0 0x10017000 0 0x1000>;
> > + interrupts = <GIC_SPI 194 IRQ_TYPE_LEVEL_HIGH>;
> > + clock-frequency = <13000000>;
>
> Replace it by a phandle to a 'fixed-clock'.
>
> eg.
>
> clocks = <&myclk>;
>
>
> > + };
>
> myclk: myclk {
> #clock-cells = <0>;
> compatible = "fixed-clock";
> clock-frequency = <13000000>;
> };
>
> Thanks
>
> -- DAniel
>
>
>
>
Hi Daniel,
13 MHz clock is necessary. We will fix it in v2 by using system's
fixed-clock.
Thanks.
Stanley Chu
next prev parent reply other threads:[~2018-06-26 6:36 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-25 7:09 Add system timer driver for Mediatek SoCs Stanley Chu
2018-06-25 7:10 ` [PATCH 1/2] dt-bindings: Add mtk-systimer bindings Stanley Chu
2018-06-25 21:53 ` Daniel Lezcano
2018-06-26 6:36 ` Stanley Chu [this message]
2018-06-25 7:10 ` [PATCH 2/2] clocksource/drivers/mtk_systimer: Add support for Mediatek SoCs Stanley Chu
2018-06-26 7:41 ` Daniel Lezcano
2018-06-26 9:52 ` Stanley Chu
2018-06-25 7:34 ` Add system timer driver " Daniel Lezcano
2018-06-25 9:07 ` Stanley Chu
2018-06-26 7:31 ` Daniel Lezcano
2018-06-26 8:03 ` Stanley Chu
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