linux-kernel - Re: [PATCH v1 2/2] dt-binding: timer: document NPCM7xx timer DT bindings

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Date:   Sun, 29 Oct 2017 22:49:35 +0200
From:   Tomer Maimon <tmaimon77@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Mark Rutland <mark.rutland@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>, tglx@...utronix.de,
        Avi Fishman <avifishman70@...il.com>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Rick Altherr <raltherr@...gle.com>, joel@....id.au,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>
Subject: Re: [PATCH v1 2/2] dt-binding: timer: document NPCM7xx timer DT bindings

Sorry for the delay,


On 10 October 2017 at 17:57, Rob Herring <robh@...nel.org> wrote:
> On Sun, Oct 01, 2017 at 12:11:38PM +0300, Tomer Maimon wrote:
>> Added device tree binding documentation for Nuvoton NPCM7xx timer.
>>
>> Signed-off-by: Tomer Maimon <tmaimon77@...il.com>
>> ---
>>  .../bindings/timer/nuvoton,npcm7xx-timer.txt       | 25 ++++++++++++++++++++++
>>  1 file changed, 25 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.txt
>>
>> diff --git a/Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.txt b/Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.txt
>> new file mode 100644
>> index 000000000000..d1beea901509
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/timer/nuvoton,npcm7xx-timer.txt
>> @@ -0,0 +1,25 @@
>> +Nuvoton NPCM7xx timer
>> +
>> +Nuvoton NPCM7xx have three timer modules, each timer module provides five 24-bit
>> +timer counters.
>> +
>> +Required properties:
>> +- compatible      : "nuvoton,npcm7xx-timer" for Poleg NPCM7xx.
>
> Don't use wildcards in compatible strings. Use SoC specific compatible
> strings with a fallback (the string for the 1st SoC which the block
> appeared) if necessary.
>
The SOC NPCM7xx is now on upstream process, I asked Brendan to modify
the NPCM7xx device tree to support the clock source driver

https://www.spinics.net/lists/arm-kernel/msg614424.html

and also the arcitecture name

https://www.spinics.net/lists/arm-kernel/msg614059.html

>> +- reg             : Offset and length of the register set for the device.
>> +- interrupts      : Contain the timer interrupt with flags for
>> +                    falling edge.
>> +
>> +Required clocking property, have to be one of:
>> +- clocks          : phandle of timer reference clock.
>> +- clock-frequency : The frequency in Hz of the clock that drives the NPCM7xx
>> +                    timer (usually 25000000).
>> +
>> +Example:
>> +
>> +timer@...08000 {
>> +    compatible = "nuvoton,npcm7xx-timer";
>> +    interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
>> +    reg = <0xf0008000 0x1000>;
>> +    clocks = <&clk NPCM7XX_CLK_TIMER>;
>> +};
>> +
>> --
>> 2.14.1
>>