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Message-ID: <8d4e3fcb-2e4a-4580-9aa2-5acbed961c3f@linaro.org>
Date:   Tue, 21 Nov 2023 14:51:21 +0100
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Subject: Re: [PATCH v2 10/12] pinctrl: samsung: add exynosautov920 pinctrl
Content-Language: en-US
To:     Jaewon Kim <jaewon02.kim@samsung.com>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Rob Herring <robh+dt@kernel.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Tomasz Figa <tomasz.figa@gmail.com>,
        Sylwester Nawrocki <s.nawrocki@samsung.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        Uwe Kleine-K?nig <u.kleine-koenig@pengutronix.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jirislaby@kernel.org>
Cc:     linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
        linux-pwm@vger.kernel.org, linux-serial@vger.kernel.org
References: <20231115095609.39883-1-jaewon02.kim@samsung.com>
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 <0fdb7bec-9ea4-454f-a0fb-d450f27ebc6b@linaro.org>
 <ab17d61e-f645-9b76-962c-4ba2849c5f42@samsung.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <ab17d61e-f645-9b76-962c-4ba2849c5f42@samsung.com>
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Precedence: bulk

On 18/11/2023 08:43, Jaewon Kim wrote:
> 
> On 23. 11. 17. 19:48, Krzysztof Kozlowski wrote:
>> On 17/11/2023 08:36, Jaewon Kim wrote:
>>>>> The reason why I chose variable name 'combine' is that EINT registers was
>>>>> separated from gpio control address. However, in exynosautov920 EINT
>>>>> registers combined with GPx group. So I chose "combine" word.
>>>> What does it mean "the GPx group"? Combined means the same place, the
>>>> same register. I could imagine offset is 0x4, what I wrote last time.
>>>>
>>>> Is the offset 0x4?
> 
> If you are asking about the offset of GPIO control register and EINT 
> control register, 0x4 is correct.
> 
> There is no empty space between the two register.
> 
> 
> 0x0 CON
> 
> 0x4 DAT
> 
> 0x8 PUD
> 
> 0xc DRV
> 
> 0x10 CONPDN
> 
> 0x14 PUDPDN
> 
> 0x18 EINT_CON
> 
> 0x1c EINT_FLTCON
> 
> 0x20 or 0x24 EINT_MASK (The size of FLTCON register depending on the 
> number of gpio)
> 
> 0x24 or 0x28 EINT_PEND
> 
> 
>>>>
>>>>
>>>>> Is another reasonable word, I will change it.
>>>> Why you cannot store the offset?
>>>>
>>>>> EINT registers related to the entire group(e.g SVC) were at the end of
>>>>> the GPIO block and are now moved to 0xf000.
>>>> So not in the same register, not combined?
>>>>
>>> Okay,
>>>
>>> Instead of the word combine, I will think of a better word in next version.
>> I want to know answer to:
>>
>> "Why you cannot store the offset?"
>>
> I did not understand exactly what you said, but if i guess,,
> 
> you want to get rid of the offs because the value of the offs is always 
> the same?
> 
> #define EXYNOSV920_PIN_BANK_EINTG(pins, reg, id, offs, mask_offs, pend_offs)

I meant that it looks possible to store the offset and use it directly,
instead of storing bool telling that offset is different.

Best regards,
Krzysztof