From patchwork Wed Jul 5 19:53:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Judith Mendez X-Patchwork-Id: 700486 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 A5B52C0015E for ; Wed, 5 Jul 2023 19:54:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232095AbjGETyZ (ORCPT ); Wed, 5 Jul 2023 15:54:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57426 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232699AbjGETyY (ORCPT ); Wed, 5 Jul 2023 15:54:24 -0400 Received: from lelv0142.ext.ti.com (lelv0142.ext.ti.com [198.47.23.249]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E5241980; Wed, 5 Jul 2023 12:54:21 -0700 (PDT) Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 365JrvnC092097; Wed, 5 Jul 2023 14:53:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1688586837; bh=TJK/6TnsUfOKeixSuU0GUyuz7aCEj/OFIX/48dSpOzY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=BAE7LtqnLPexBAYTBree6Ijhieu3qeoY4shjwK5shzgUcF8pqKb3qegqjxK6qYNym 9tUFbezet/x8zKLphtLga/ycg2bxvrBLPQPvr30tJ8fnFmzCmpU3VSiSjpuRzcB99q Vy9PYDb7IgKdpHaiMTX/l3zWF+f3t4w1L7ZtYmco= Received: from DLEE107.ent.ti.com (dlee107.ent.ti.com [157.170.170.37]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 365JrvDT024240 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 5 Jul 2023 14:53:57 -0500 Received: from DLEE112.ent.ti.com (157.170.170.23) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Wed, 5 Jul 2023 14:53:56 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE112.ent.ti.com (157.170.170.23) 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; Wed, 5 Jul 2023 14:53:56 -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 365JrueT041658; Wed, 5 Jul 2023 14:53:56 -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 1/2] dt-bindings: net: can: Remove interrupt properties for MCAN Date: Wed, 5 Jul 2023 14:53:55 -0500 Message-ID: <20230705195356.866774-2-jm@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230705195356.866774-1-jm@ti.com> References: <20230705195356.866774-1-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-v9: 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>; + }; + }; + ...