From patchwork Fri Jul 7 20:47:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Judith Mendez X-Patchwork-Id: 700176 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C747FEB64D9 for ; Fri, 7 Jul 2023 20:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232736AbjGGUrw (ORCPT ); Fri, 7 Jul 2023 16:47:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232501AbjGGUrs (ORCPT ); Fri, 7 Jul 2023 16:47:48 -0400 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BAADE1FEB; Fri, 7 Jul 2023 13:47:46 -0700 (PDT) Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 367KlFIk079093; Fri, 7 Jul 2023 15:47:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1688762835; bh=Q+1qEgrbdhFzqpobQWWz1jtTME3cq6nt2yxfnflNa4c=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=HTz4FB85hFNJFpdssO39BphGN5ofhNgfTnzktJyRee1TBHsjFYwveKXoMpXWW1Fv8 anVUvhRY5HixhaZw1y+cSVye6ccqFaiANShoCtsqunNmrmyKopL1PuQqmtHJ1bx6ce bGR+ooezNyWfgN7+f/zSMUPLSqPS2GJa5B+HCae8= Received: from DFLE100.ent.ti.com (dfle100.ent.ti.com [10.64.6.21]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 367KlFah115977 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 7 Jul 2023 15:47:15 -0500 Received: from DFLE105.ent.ti.com (10.64.6.26) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Fri, 7 Jul 2023 15:47:14 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Fri, 7 Jul 2023 15:47:14 -0500 Received: from uda0498204.dhcp.ti.com (ileaxei01-snat.itg.ti.com [10.180.69.5]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 367KlE9K115786; Fri, 7 Jul 2023 15:47:14 -0500 From: Judith Mendez To: Chandrasekar Ramakrishnan , Marc Kleine-Budde CC: Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , , , , Schuyler Patton , Tero Kristo , Rob Herring , Krzysztof Kozlowski , , Oliver Hartkopp , Simon Horman Subject: [PATCH v10 1/2] dt-bindings: net: can: Remove interrupt properties for MCAN Date: Fri, 7 Jul 2023 15:47:13 -0500 Message-ID: <20230707204714.62964-2-jm@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230707204714.62964-1-jm@ti.com> References: <20230707204714.62964-1-jm@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On AM62x SoC, MCANs on MCU domain do not have hardware interrupt routed to A53 Linux, instead they will use software interrupt by timer polling. To enable timer polling method, interrupts should be optional so remove interrupts property from required section and add an example for MCAN node with timer polling enabled. Reviewed-by: Tony Lindgren Reviewed-by: Conor Dooley Acked-by: Krzysztof Kozlowski Signed-off-by: Judith Mendez --- Changelog: v6-v10: 1. No changes v5: 1. Remove poll-interval 2. Remove oneOf that selects interrupts/interrupt-names or poll-interval v3: 1. Update binding poll-interval description 2. Add oneOf to select interrupts/interrupt-names or poll-interval v2: 1. Add poll-interval property to enable timer polling method 2. Add example using poll-interval property --- .../bindings/net/can/bosch,m_can.yaml | 20 +++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml index 67879aab623b..bb518c831f7b 100644 --- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml +++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml @@ -122,8 +122,6 @@ required: - compatible - reg - reg-names - - interrupts - - interrupt-names - clocks - clock-names - bosch,mram-cfg @@ -132,6 +130,7 @@ additionalProperties: false examples: - | + // Example with interrupts #include can@20e8000 { compatible = "bosch,m_can"; @@ -149,4 +148,21 @@ examples: }; }; + - | + // Example with timer polling + #include + can@20e8000 { + compatible = "bosch,m_can"; + reg = <0x020e8000 0x4000>, <0x02298000 0x4000>; + reg-names = "m_can", "message_ram"; + clocks = <&clks IMX6SX_CLK_CANFD>, + <&clks IMX6SX_CLK_CANFD>; + clock-names = "hclk", "cclk"; + bosch,mram-cfg = <0x0 0 0 32 0 0 0 1>; + + can-transceiver { + max-bitrate = <5000000>; + }; + }; + ...