From patchwork Mon Jul 19 14:53:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 480312 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3F79C07E9B for ; Mon, 19 Jul 2021 15:02:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B0EF9610D2 for ; Mon, 19 Jul 2021 15:02:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242985AbhGSOVe (ORCPT ); Mon, 19 Jul 2021 10:21:34 -0400 Received: from mo4-p02-ob.smtp.rzone.de ([85.215.255.82]:25184 "EHLO mo4-p02-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242671AbhGSOU0 (ORCPT ); Mon, 19 Jul 2021 10:20:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1626706853; s=strato-dkim-0002; d=gerhold.net; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Cc:Date: From:Subject:Sender; bh=D9jLnGFFfl0x5fMc0kVYPG+YxasQE/08QYG4uhDFffU=; b=VRDJu6pIedu+0M3zZ6vkv4+923tP9wgXcSFZQ/2tw+d2f3qsWN0WiD8YEJOBNP2r0b BWJratQFKsng6qGmj11J3rCdtRSXhb6+PumQW0EteVrvQgnnpQ/gAtYtQGJ1Dqn2b90t 9w8RnIx4N6StDC+z+aeckG/DjmvqoU3F0aYwljn4sCihFKo3ORTigLRXTwQDn5l7yFJk MjqR+lBP4vp8Z237j52JpkeVC8UQKxVAYWd4Ay9R7ppuAd5RIF2gBoD8Dp+OkM6ra3Kh g2wPhTiLGxm3zjyEeP2NQ9XLeTq20tDAxfE4B32jV5tBqb3qdlWW4obNTiZF35bLDzHY oEFw== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXS7IYBkLahKxB4m6O43/v" X-RZG-CLASS-ID: mo00 Received: from droid.. by smtp.strato.de (RZmta 47.28.1 DYNA|AUTH) with ESMTPSA id g02a44x6JF0o43M (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Mon, 19 Jul 2021 17:00:50 +0200 (CEST) From: Stephan Gerhold To: "David S. Miller" , Jakub Kicinski Cc: Loic Poulain , Sergey Ryazanov , Johannes Berg , Bjorn Andersson , Andy Gross , Vinod Koul , Rob Herring , Aleksander Morgado , netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Jeffrey Hugo , Stephan Gerhold Subject: [RFC PATCH net-next 3/4] dt-bindings: net: Add schema for Qualcomm BAM-DMUX Date: Mon, 19 Jul 2021 16:53:16 +0200 Message-Id: <20210719145317.79692-4-stephan@gerhold.net> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719145317.79692-1-stephan@gerhold.net> References: <20210719145317.79692-1-stephan@gerhold.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The BAM Data Multiplexer provides access to the network data channels of modems integrated into many older Qualcomm SoCs, e.g. Qualcomm MSM8916 or MSM8974. It is built using a simple protocol layer on top of a DMA engine (Qualcomm BAM) and bidirectional interrupts to coordinate power control. The device tree node combines the incoming interrupt with the outgoing interrupts (smem-states) as well as the two DMA channels, which allows the BAM-DMUX driver to request all necessary resources. Signed-off-by: Stephan Gerhold --- .../bindings/net/qcom,bam-dmux.yaml | 87 +++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/qcom,bam-dmux.yaml diff --git a/Documentation/devicetree/bindings/net/qcom,bam-dmux.yaml b/Documentation/devicetree/bindings/net/qcom,bam-dmux.yaml new file mode 100644 index 000000000000..33e125e70cb4 --- /dev/null +++ b/Documentation/devicetree/bindings/net/qcom,bam-dmux.yaml @@ -0,0 +1,87 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/qcom,bam-dmux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm BAM Data Multiplexer + +maintainers: + - Stephan Gerhold + +description: | + The BAM Data Multiplexer provides access to the network data channels + of modems integrated into many older Qualcomm SoCs, e.g. Qualcomm MSM8916 + or MSM8974. It is built using a simple protocol layer on top of a DMA engine + (Qualcomm BAM DMA) and bidirectional interrupts to coordinate power control. + +properties: + compatible: + const: qcom,bam-dmux + + interrupts: + description: + Interrupts used by the modem to signal the AP. + Both interrupts must be declared as IRQ_TYPE_EDGE_BOTH. + items: + - description: Power control + - description: Power control acknowledgment + + interrupt-names: + items: + - const: pc + - const: pc-ack + + qcom,smem-states: + $ref: /schemas/types.yaml#/definitions/phandle-array + description: State bits used by the AP to signal the modem. + items: + - description: Power control + - description: Power control acknowledgment + + qcom,smem-state-names: + description: Names for the state bits used by the AP to signal the modem. + items: + - const: pc + - const: pc-ack + + dmas: + items: + - description: TX DMA channel phandle + - description: RX DMA channel phandle + + dma-names: + items: + - const: tx + - const: rx + +required: + - compatible + - interrupts + - interrupt-names + - qcom,smem-states + - qcom,smem-state-names + - dmas + - dma-names + +additionalProperties: false + +examples: + - | + #include + + mpss: remoteproc { + bam-dmux { + compatible = "qcom,bam-dmux"; + + interrupt-parent = <&modem_smsm>; + interrupts = <1 IRQ_TYPE_EDGE_BOTH>, <11 IRQ_TYPE_EDGE_BOTH>; + interrupt-names = "pc", "pc-ack"; + + qcom,smem-states = <&apps_smsm 1>, <&apps_smsm 11>; + qcom,smem-state-names = "pc", "pc-ack"; + + dmas = <&bam_dmux_dma 4>, <&bam_dmux_dma 5>; + dma-names = "tx", "rx"; + }; + };