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Message-ID: <3e92295f-3c8b-4699-bf50-0fc2b43ddf1b@linaro.org>
Date:   Fri, 8 Dec 2023 13:19:43 +0100
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Subject: Re: [PATCH v3 1/2] dt-bindings: gpio: realtek: Add realtek,rtd-gpio
Content-Language: en-US
To:     =?UTF-8?B?VFlfQ2hhbmdb5by15a2Q6YC4XQ==?= <tychang@realtek.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Andy Shevchenko <andy@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>
Cc:     "linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
References: <20231207100723.15015-1-tychang@realtek.com>
 <20231207100723.15015-2-tychang@realtek.com>
 <dd22f0fb-e07b-4bd4-bd6a-cf2d8a5687fc@linaro.org>
 <b3a41f598bc043ce9626b674a92b8da4@realtek.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <b3a41f598bc043ce9626b674a92b8da4@realtek.com>
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On 08/12/2023 10:03, TY_Chang[張子逸] wrote:

> 
> The DTS use in our platform follows this structure:
> 
> soc@0 {
>     rbus: rbus@98000000 {
> 	    ...
>         iso: syscon@7000 {
> 		    ...
>             gpio: gpio@100 {
>                 compatible = "realtek,rtd1319d-iso-gpio";
>                 reg = <0x100 0x100>,
>                       <0x000 0x0b0>;
>                 interrupt-parent = <&iso_irq_mux>;
>                 interrupts = <19>, <20>;
>                 gpio-ranges = <&pinctrl 0 0 82>;
>                 gpio-controller;
>                 #gpio-cells = <2>;
>             };
>         };
>     };
> };
> 
> The base address for the GPIO controller is 0x98007100. The second line of
> 'reg' refers to the GPIO interrupt status registers, which are distributed
> within the range of 0x98007000 to 0x980070AF. 

Ah, ok.

> Would it be advisable to fetch the
> syscon from parent node(iso: syscon@7000) to handle the GPIO interrupt status
> registers?

If these are GPIO interrupts then current description is fine.

> 
>> It is, btw, 0x0, not 0x000. The same for 0x0b0 -> 0xb0, unless you want to pad
>> to full word.
>>

Best regards,
Krzysztof