From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 12A2A144D21; Tue, 4 Jun 2024 11:57:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.235.227.194 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717502279; cv=none; b=Nhvt5TOJEp76dbKsMQOxQhJs/3nn1v/xv0wODOqxyjjsqkwr2IrtLf7dvqhzuflfmMxlefAtyBEqSC7Wfw8bbrt6qQdw7gLqgiiCpfGznxDMWfH/uWzDZ59aR/QkRpDL5900yipr6zNyEFieeaJgOBXuKdaTcehKlFB73bOTiKo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717502279; c=relaxed/simple; bh=56062WNHk69vFRqNKez1ZJ1vLNNKXi2bStApeOpZP7g=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ObwgTb2jNUWVJVw7ilOWTjw39e5EDpQz7hxELGaTX9lp3bayor3jLH61g4TIz1F+864KMFjnQ3+z6usoJupCTt6tlKaL+3K48Htr/UYzf3qOHaZzIv0v0CpDk+/c5WawXxLXeZHJua08xkJuszUrQT9QGlWogpi6iL+LV58M4hQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=hIgWr2/k; arc=none smtp.client-ip=46.235.227.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="hIgWr2/k" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1717502276; bh=56062WNHk69vFRqNKez1ZJ1vLNNKXi2bStApeOpZP7g=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=hIgWr2/k1iqL5wvZ12nj8yXRxSrrlg5e8poWaVTErsNd9V1SqVxaBN4bgBCT8VmB4 pZhLvQQxHfkjVu7Oji8axJFgpwAUPWXj+NlNJIATSxaytE4YgEzPlhhOuIMttnEqbR DXt9+almqD59l7ygrhH0Aglgu7AGfCI0aJO4ZKCMTJ0xKmCTQ9Qw8GtUw9PSpnf+Jw mMdVEtG8LcvUePuCQL45fOf4GZFXtKf+CSZg1Zz3OFCOs1/ISjoNokxi/Cvscnwuzx nNOSTiEElWrd86s0H5RleZ070LQXtIgCsl8MDKFF2N7rMNhlqTu64EZyAYx2GsWXPK BX8k84AVfCalw== Received: from [100.113.186.2] (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madrid.collaboradmins.com (Postfix) with ESMTPSA id F11453782199; Tue, 4 Jun 2024 11:57:54 +0000 (UTC) Message-ID: <630d943e-3bf3-46ab-b3b8-cc44a86cab64@collabora.com> Date: Tue, 4 Jun 2024 13:57:54 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 2/4] iio: adc: Add support for MediaTek MT6357/8/9 Auxiliary ADC To: Andy Shevchenko Cc: Jonathan Cameron , lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, matthias.bgg@gmail.com, lee@kernel.org, andy@kernel.org, nuno.sa@analog.com, bigunclemax@gmail.com, dlechner@baylibre.com, marius.cristea@microchip.com, marcelo.schmitt@analog.com, fr0st61te@gmail.com, mitrutzceclan@gmail.com, mike.looijmans@topic.nl, marcus.folkesson@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, kernel@collabora.com References: <20240530093410.112716-1-angelogioacchino.delregno@collabora.com> <20240530093410.112716-3-angelogioacchino.delregno@collabora.com> <20240602111141.0058f39e@jic23-huawei> <60e55919-2a8c-4d83-89a1-6e4ae156d34d@collabora.com> From: AngeloGioacchino Del Regno Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Il 04/06/24 12:55, Andy Shevchenko ha scritto: > On Tue, Jun 4, 2024 at 12:42 PM AngeloGioacchino Del Regno > wrote: >> Il 02/06/24 12:11, Jonathan Cameron ha scritto: >>> On Thu, 30 May 2024 11:34:08 +0200 >>> AngeloGioacchino Del Regno wrote: > > ... > >>> What are IMP channels? >> >> Honestly? Well, it's called like that. I don't have any clear description of that >> and not even datasheets are unrolling the meaning of "IMP". So.. I don't know. >> >> What I know is what I wrote in the driver, and this is: >> * IMP has IBAT and VBAT ADCs >> * It needs different handling from the other ADCs, as shown. >> >> ...and nothing else :-( > > I could speculate with confidence that this means IMPedance (since it's ADC). > > From MTK6329 datasheet: > "The hardware also includes necessary modes to allow for simultaneous > current and voltage measurement > which can be utilized to estimate the battery impedance." > And googling in vendor trees also suggests the same. > That does make a lot of sense. Thanks for that, I don't have the 6329 datasheet. Great, one more piece added to the puzzle! Cheers, Angelo