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([2600:8803:e7e4:500:1635:b560:bfdd:f758]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7cadb1ff4desm10030529a34.7.2025.12.15.07.58.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 15 Dec 2025 07:58:37 -0800 (PST) Message-ID: <8ef3fbd1-b746-4379-b615-e3034ec8f39e@baylibre.com> Date: Mon, 15 Dec 2025 09:58:36 -0600 Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] dt-bindings: iio: adc: Add TI ADS1120 binding To: Ajith Anandhan , Jonathan Cameron Cc: nuno.sa@analog.com, andy@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20251109141119.561756-1-ajithanandhan0406@gmail.com> <20251109141119.561756-2-ajithanandhan0406@gmail.com> <20251115183144.15b3e236@jic23-huawei> <5cb6243e-f47b-48dc-9f43-299cde632e08@baylibre.com> Content-Language: en-US From: David Lechner In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 12/15/25 8:49 AM, Ajith Anandhan wrote: > On 11/18/25 5:49 AM, David Lechner wrote: >> On 11/15/25 12:31 PM, Jonathan Cameron wrote: >>> On Sun,  9 Nov 2025 19:41:18 +0530 >>> Ajith Anandhan wrote: >>> ... >>>> + >>>> +  ti,avdd-is-ref: >>>> +    type: boolean >>>> +    description: | >>>> +      If present, indicates that the AVDD supply voltage is of sufficient >>>> +      quality and stability to be used as the voltage reference instead of >>>> +      the internal reference. This allows the driver to select AVDD as the >>>> +      reference source for potentially better performance. >>> This one is interesting as I don't recall anyone arguing this made >>> sense before.  In what way better performance?  Are their boards out >>> there where this definitely makes sense to do? >>> >> Seems harmless to have the property even if no one ever uses it. But I would >> be curious to know the answers to those questions too. > > > I included this property based on the datasheet mentioning AVDD as a possible reference source, butit doesn't claim this provides better performance, and I don't currently have a specific use case or hardware design that requires it. > > How to proceed ? Need your valuable suggestions. > > > BR, > > Ajith. > >> > It sounds like it is unlikely to be used in practice, so I won't object if you want to drop it to keep things simple.