From: "Ayyathurai, Vijayakannan" <vijayakannan.ayyathurai@intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Rob Herring <robh@kernel.org>
Cc: "daniel.lezcano@linaro.org" <daniel.lezcano@linaro.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"mgross@linux.intel.com" <mgross@linux.intel.com>,
"Wan Mohamad,
Wan Ahmad Zainie" <wan.ahmad.zainie.wan.mohamad@intel.com>,
"Raja Subramanian,
Lakshmi Bai" <lakshmi.bai.raja.subramanian@intel.com>,
"Seow, Chen Yong" <chen.yong.seow@intel.com>
Subject: RE: [PATCH v1 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC timer
Date: Wed, 16 Dec 2020 19:16:42 +0000 [thread overview]
Message-ID: <DM6PR11MB42501571618F3017BD147F39FBC50@DM6PR11MB4250.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20201208181224.GM4077@smile.fi.intel.com>
Hi Rob,
> From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> On Tue, Dec 08, 2020 at 10:12:47AM -0600, Rob Herring wrote:
> > > From: Vijayakannan Ayyathurai <vijayakannan.ayyathurai@intel.com>
> > >
> > > Add Device Tree bindings for the Timer IP, which used as clocksource and
> > > clockevent in the Intel Keem Bay SoC.
>
> ...
>
> > > +examples:
> > > + - |
> > > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > + #include <dt-bindings/interrupt-controller/irq.h>
> > > + #define KEEM_BAY_A53_TIM
> > > +
> > > + timer@20330010 {
> > > + compatible = "intel,keembay-timer";
> > > + reg = <0x20330010 0xc>,
> > > + <0x20331000 0xc>;
> > > + interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
> > > + clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
> > > + };
> > > +
> > > + counter@203300e8 {
> > > + compatible = "intel,keembay-counter";
> > > + reg = <0x203300e8 0xc>,
> > > + <0x20331000 0xc>;
> >
> > You have overlapping reg regions here. Don't do that. Define the DT
> > in terms of the h/w, not how you want to split things for Linux.
> >
> > It looks like a single h/w block providing multiple functions.
>
> Actually a good catch.
>
> Perhaps it needs to have a parent device that provides three resources (one
> common and one per each of two functions) and in the driver it should
> consume
> them accordingly. Though I'm not an expert in DT, does it sound correct from
> your perspective?
>
May I know your feedback for the below way, which Andy suggested.
I will adapt the driver based on this in the next version.
timer@20331000 {
compatible = "intel,keembay-timer";
reg = <20331000 0xc>;
gpt@20330010 {
compatible = "intel,keembay-gpt";
reg = <20330010 0xc>;
interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
};
counter@203300e8 {
compatible = "intel,keembay-counter";
reg = <203300e8 0xc>;
clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
};
};
Thanks,
Vijay
next prev parent reply other threads:[~2020-12-16 19:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-26 10:34 [PATCH v1 0/2] Add drivers for Intel Keem Bay SoC timer block vijayakannan.ayyathurai
2020-11-26 10:34 ` [PATCH v1 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC timer vijayakannan.ayyathurai
2020-12-08 16:12 ` Rob Herring
2020-12-08 18:12 ` Andy Shevchenko
2020-12-16 19:16 ` Ayyathurai, Vijayakannan [this message]
2020-11-26 10:34 ` [PATCH v1 2/2] clocksource: Add Intel Keem Bay Timer Support vijayakannan.ayyathurai
2020-12-03 18:09 ` Daniel Lezcano
2020-12-03 18:09 ` Daniel Lezcano
2020-12-04 4:09 ` Ayyathurai, Vijayakannan
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