From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0677BCD13DA for ; Thu, 30 Apr 2026 10:04:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=AR7X+PpEiegiepOpCf1D9c6k0wQQbKryxj6Qs+Uc4Gk=; b=X80wDWll17oRT1VSdOJw9Y8uth 6gt/jjV9CBrnE7VXEA5e7p2utJUJ1IiUKiRwGGbzugLzzmu5lvp4KCKqpo4/T1jrYskZ83tI94D2a RDazgOUphVhTdLsdVO4cXA4Gb62okhlWL1uRzShFHkvSBLHhG+Xc825VcVKuJm3tyy1EJefKPUdPg io1O2snK9oRX4wdTbo1V+A4BpMNZJ+5tIXzYASL71G6G93mM6Inpj6h2wsy7RVxT3H+Wh7iMifXhT dcFI+BEiBFRq8ue089zNLByX9iaxTvJOHrrC7Ffa7Pl2jYV69MdgcmgWhLKYpDkCIBhmOVxF/ByNO 5EO5PbOA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wIOG1-000000059ve-3388; Thu, 30 Apr 2026 10:04:33 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w2ukP-000000095MM-2sSf for linux-i3c@lists.infradead.org; Wed, 18 Mar 2026 17:31:59 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 4707D4434A; Wed, 18 Mar 2026 17:31:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB0E4C19421; Wed, 18 Mar 2026 17:31:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773855117; bh=HhmffGUp9Y91NzAt05HzDzuECj5jUzcfd9L5WeMVgRE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fOhJ7numKOTyFBGnbu6sjnslIaPgCJ6YJoNRlo6wqbaJaq+9rC7PSaCpwXncYgTUX 9MqJ59SRYVHNytkkWTAwz0gzeu7m+MXqf/eEDMBtZGVSYSGpXzXWULVV77yqfflHDq ilse5DP9qMKG9asn0/dUsMEMzuh6B5OU3L3zdoJ91s9Ic/2y0asVQMle9Mf7X2uBGU q3sRJWhRMSGUytZmVNHhxbl+jQFHQUILMBBTBQvOjsU5EaI+uKOsD6GZVZ31IxG4ya wn0OvCp5ve3TA23cpFHAZ+Qc2cfH7s65Vrvt9Axuv2SufIQ0b+JY6op8DbG3hqOVol 1tZ8ip/vfNkYQ== Date: Wed, 18 Mar 2026 17:31:50 +0000 From: Conor Dooley To: Akhil R Cc: Alexandre Belloni , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , "Rafael J . Wysocki" , Robert Moore , Len Brown , Guenter Roeck , Philipp Zabel , Eric Biggers , Fredrik Markstrom , Miquel Raynal , Thierry Reding , Jon Hunter , Suresh Mangipudi , linux-tegra@vger.kernel.org, linux-i3c@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, linux-hwmon@vger.kernel.org Subject: Re: [PATCH 01/12] dt-bindings: i3c: Add mipi-i3c-static-method to support SETAASA Message-ID: <20260318-tweed-herbicide-eb924ef056b8@spud> References: <20260318172820.13771-1-akhilrajeev@nvidia.com> <20260318172820.13771-2-akhilrajeev@nvidia.com> MIME-Version: 1.0 In-Reply-To: <20260318172820.13771-2-akhilrajeev@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260318_103157_773441_05499266 X-CRM114-Status: GOOD ( 30.43 ) X-Mailman-Approved-At: Thu, 30 Apr 2026 03:04:33 -0700 X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1723399908213032092==" Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org --===============1723399908213032092== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="EmK0zunkW5CWMMpV" Content-Disposition: inline --EmK0zunkW5CWMMpV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Mar 18, 2026 at 10:57:14PM +0530, Akhil R wrote: > Add the 'mipi-i3c-static-method' property mentioned in the MIPI I3C > Discovery and Configuration Specification [1] to specify which discovery > method an I3C device supports during bus initialization. The property is > a bitmap, where a bit value of 1 indicates support for that method, and 0 > indicates lack of support. > Bit 0: SETDASA CCC (Direct) > Bit 1: SETAASA CCC (Broadcast) > Bit 2: Other CCC (vendor / standards extension) > All other bits are reserved. >=20 > It is specifically needed when an I3C device requires SETAASA for the > address assignment. SETDASA will be supported by default if this property > is absent - which means for now the property just serves as a flag to > enable SETAASA, but keep the property as a bitmap to align with the > specifications. >=20 > [1] https://www.mipi.org/specifications/disco >=20 > Signed-off-by: Akhil R > --- > .../devicetree/bindings/i3c/i3c.yaml | 30 ++++++++++++++++--- > 1 file changed, 26 insertions(+), 4 deletions(-) >=20 > diff --git a/Documentation/devicetree/bindings/i3c/i3c.yaml b/Documentati= on/devicetree/bindings/i3c/i3c.yaml > index e25fa72fd785..1705d90d4d79 100644 > --- a/Documentation/devicetree/bindings/i3c/i3c.yaml > +++ b/Documentation/devicetree/bindings/i3c/i3c.yaml > @@ -31,10 +31,12 @@ properties: > described in the device tree, which in turn means we have to descr= ibe > I3C devices. > =20 > - Another use case for describing an I3C device in the device tree i= s when > - this I3C device has a static I2C address and we want to assign it a > - specific I3C dynamic address before the DAA takes place (so that o= ther > - devices on the bus can't take this dynamic address). > + Other use-cases for describing an I3C device in the device tree ar= e: > + - When the I3C device has a static I2C address and we want to assi= gn > + it a specific I3C dynamic address before the DAA takes place (so > + that other devices on the bus can't take this dynamic address). > + - When the I3C device requires SETAASA for its discovery and uses a > + pre-defined static address. > =20 > "#size-cells": > const: 0 > @@ -147,6 +149,26 @@ patternProperties: > through SETDASA. If static address is not present, this addres= s is assigned > through SETNEWDA after assigning a temporary address via ENTDA= A. > =20 > + mipi-i3c-static-method: > + $ref: /schemas/types.yaml#/definitions/uint32 > + minimum: 0x1 > + maximum: 0xff > + default: 1 > + description: | > + Bitmap describing which methods of Dynamic Address Assignment = =66rom a > + static address are supported by this I3C Target. A bit value o= f 1 > + indicates support for that method, and 0 indicates lack of sup= port. I really am not keen on properties that are bitmaps, why can't we just use the strings "setdasa", "setaasa" etc? > + Bit 0: SETDASA CCC (Direct) > + Bit 1: SETAASA CCC (Broadcast) > + Bit 2: Other CCC (vendor / standards extension) > + All other bits are reserved. > + > + This property follows the MIPI I3C specification. The primary = use > + of this property is to indicate support for SETAASA, i.e Bit 1= , but > + will allow all values so that it is aligned with the specifica= tions. > + SETDASA will remain as the default method even if this propert= y is > + not present. > + > required: > - reg > =20 > --=20 > 2.50.1 >=20 --EmK0zunkW5CWMMpV Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRh246EGq/8RLhDjO14tDGHoIJi0gUCabrhhgAKCRB4tDGHoIJi 0kMwAP9M6TXwaUc/BKHm+0Rt/FM5DM33/g7JjBxK1p/4dzSpUAD/Qrggu6aS3gqn FhlL6llczwN+H7jlvZoHMk1JsE+xJgc= =/Hz0 -----END PGP SIGNATURE----- --EmK0zunkW5CWMMpV-- --===============1723399908213032092== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c --===============1723399908213032092==--