From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 DA81328C5CD for ; Tue, 22 Apr 2025 13:57:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745330244; cv=none; b=de6/3KUI77+qkwndt4QQI3+pK6iQt1oKzyJKbq+GzPi28GdXUbr7/OVSeUTXIpH6WC4i5ZGlvArAr6fEXjj2p8ihhMwz5YE+m3Wx12q7ObuWebOb0ebqcTPjUBGHs6GAs1CPFGdM68y0OG5Y1POJqBJww0xPgzfU3NGB4YxbFbI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745330244; c=relaxed/simple; bh=sRX4HfUJdU7lcgcSh/8xeDqOhZ8/zUxPhEsiu2cBQm8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=n2CB8OJcUdM27OKWSUGUyCJeJrAfwP9Bz0g+QwKT5u+batYaozuxsPdaXuPE8fnf2XPEE5LiHoqaecKA2+roeF1QlnfuxNXvSJxaB36SzQ0GusbnpUkWfd1sImaob/1heo10GH+7TE46zqw63Zzyi3odhmTNpd8KdfT1mpBnKN8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none 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=cky0Yhy2; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="cky0Yhy2" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1745330241; bh=sRX4HfUJdU7lcgcSh/8xeDqOhZ8/zUxPhEsiu2cBQm8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=cky0Yhy2DIsuOtweyefTTMgSOzhbcOp9Z9JmboN5FQUCMjy2TZiKWIef9tcVIA1+T /QoI4yEmASecn0JZsXuNEyvrGpBGDgbcqs5ihc+o69m9mR0EpeKG+8z1QCwpnagTAi aEmARG91n8nfF9/tRas5SbBIntzpOYyPyLcBIrwoQL/Y98tBUc7kJTu1r+/v5AyLzE mh27OR0WwbIFaKyWGQ0skmcB3uRWeVz2VBm5R3elvjzuLnZannrN8OsmCBdMQDtIdU +lKkwKysIPevQxr4gR0AHW7A+7jwe5XENMV4lLCS8DAvsArn+k2HppHdFPWLbVzw39 GkM1VNXkHNf4Q== Received: from [192.168.1.100] (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: kholk11) by bali.collaboradmins.com (Postfix) with ESMTPSA id 3C5F317E362C; Tue, 22 Apr 2025 15:57:20 +0200 (CEST) Message-ID: Date: Tue, 22 Apr 2025 15:57:19 +0200 Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/8] dt-bindings: HID: i2c-hid: elan: Introduce Elan eKTH8D18 To: Chen-Yu Tsai , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , Benson Leung , Tzung-Bi Shih , Dmitry Torokhov Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, chrome-platform@lists.linux.dev, linux-input@vger.kernel.org, Douglas Anderson References: <20250421101248.426929-1-wenst@chromium.org> <20250421101248.426929-2-wenst@chromium.org> From: AngeloGioacchino Del Regno Content-Language: en-US In-Reply-To: <20250421101248.426929-2-wenst@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Il 21/04/25 12:12, Chen-Yu Tsai ha scritto: > The Elan eKTH8D18 touchscreen controller is an I2C HID device with a > longer boot-up time. Power sequence timing wise it is compatible with > the eKTH6A12NAY, with a power-on delay of at least 5ms, 20ms > out-of-reset for I2C ack response, and 150ms out-of-reset for I2C HID > enumeration, both shorter than what the eKTH6A12NAY requires. > Enumeration and subsequent operation follows the I2C HID standard. > > Add a compatible string for it with the ekth6a12nay one as a fallback. > No enum was used as it is rare to actually add new entries. These > chips are commonly completely backward compatible, and unless the > power sequencing delays change, there is no real effort being made to > keep track of new parts, which come out constantly. > > Also drop the constraints on the I2C address since it's not really > part of the binding. > > Signed-off-by: Chen-Yu Tsai Reviewed-by: AngeloGioacchino Del Regno