From patchwork Wed May 19 14:36:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhupesh Sharma X-Patchwork-Id: 12267749 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=-18.7 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,URIBL_BLOCKED, 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 05D92C433B4 for ; Wed, 19 May 2021 14:39:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DAED361363 for ; Wed, 19 May 2021 14:39:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354273AbhESOkk (ORCPT ); Wed, 19 May 2021 10:40:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43696 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354323AbhESOk2 (ORCPT ); Wed, 19 May 2021 10:40:28 -0400 Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3783CC061357 for ; Wed, 19 May 2021 07:38:33 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d16so10022936pfn.12 for ; Wed, 19 May 2021 07:38:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=9/tRHikibb3VDcl2hDfDt+wuIOHwmbk3mgz2i/PihKw=; b=u7a89WZVIzdktaGkwWnlPlSmIYDzJGnbfm2CzHxBCMEXDIfmNMOp1L93vDZcA3DCeY g8Bpv1A/OuH0LefeJglan+PMxiZvB3+FXyoqBTYIIVZRAgQMTyhi8kLEmyUBubi2OdOl litNXvhurgiw0cbCTNxEUyGwmhW44MEJ1MC+CXylJpcsWhkv/E8CceaHzap3LI2NMtSq qcyT6r3qbHwIDIR0djgRhem08/+U14EkkuTYd+ilqHqwvQrSCfI+ITg5319w+fs6O40U kmO7/QsI7o0lWCYTJsn/gVTXbZZAL/Z6xy0h3HSyznfKI4MRanSyAHxeZGsHUs1k/IiD hOMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=9/tRHikibb3VDcl2hDfDt+wuIOHwmbk3mgz2i/PihKw=; b=RvcceYKtxF39sC/F4cemp3V+sXKTFwUHK+W7FxxeL6qIlL/7aH2YFy/f6k42hhL5kf 3rmGeXFgZtis+lr29ix2R71SxK1OL4Wg1ibUikJ2Da5m1BgPJoqHpBPGah6o403fbRRO QqH1QgXcFXPAqlTP9A4O/P4ftrocIocGHyVvfoNS7MuIMvyM5/N4ewrfm1c77z2UmZ+p ZtG9XRHxyr+NLWuPMxWeHWW9mxJnLmSPUVe3fgsPGmY/74HR6z6KS0SxhU46EpIIXJoY lejuDyauGfz2v6NuDHxmGsAihmuTrPXr2X7gI83d5BrdhcX3E7vhLngWOuXjRAzg9SHR QFkw== X-Gm-Message-State: AOAM530wMYJFc+0SnPu9bOHznD2FbjDRg/Z6RyniJndR3N7XwB7MgHi1 Ek8IZZR9/dt4bKSq5n+2DGNHjiZkCkeEdA== X-Google-Smtp-Source: ABdhPJwATRlheQTYTLSdGD+kSlPUqq4AspzaBlyRyYQdhQsx6Na2MFDmsbjDiYvm50TCzRC4mqShDw== X-Received: by 2002:a63:6486:: with SMTP id y128mr11051673pgb.414.1621435112516; Wed, 19 May 2021 07:38:32 -0700 (PDT) Received: from localhost.localdomain.name ([122.177.135.250]) by smtp.gmail.com with ESMTPSA id o24sm9239515pgl.55.2021.05.19.07.38.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 May 2021 07:38:32 -0700 (PDT) From: Bhupesh Sharma To: linux-arm-msm@vger.kernel.org Cc: bhupesh.sharma@linaro.org, Thara Gopinath , Bjorn Andersson , Rob Herring , Andy Gross , Herbert Xu , "David S . Miller" , Stephen Boyd , Michael Turquette , Vinod Koul , dmaengine@vger.kernel.org, linux-clk@vger.kernel.org, linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, bhupesh.linux@gmail.com Subject: [PATCH v3 10/17] dma: qcom: bam_dma: Add support to initialize interconnect path Date: Wed, 19 May 2021 20:06:53 +0530 Message-Id: <20210519143700.27392-11-bhupesh.sharma@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210519143700.27392-1-bhupesh.sharma@linaro.org> References: <20210519143700.27392-1-bhupesh.sharma@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Thara Gopinath BAM dma engine associated with certain hardware blocks could require relevant interconnect pieces be initialized prior to the dma engine initialization. For e.g. crypto bam dma engine on sm8250. Such requirement is passed on to the bam dma driver from dt via the "interconnects" property. Add support in bam_dma driver to check whether the interconnect path is accessible/enabled prior to attempting driver intializations. Cc: Bjorn Andersson Cc: Rob Herring Cc: Andy Gross Cc: Herbert Xu Cc: David S. Miller Cc: Stephen Boyd Cc: Michael Turquette Cc: Vinod Koul Cc: dmaengine@vger.kernel.org Cc: linux-clk@vger.kernel.org Cc: linux-crypto@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: bhupesh.linux@gmail.com Signed-off-by: Thara Gopinath [ bhupesh.sharma@linaro.org: Make header file inclusion alphabetical and use devm_of_icc_get() ] Signed-off-by: Bhupesh Sharma --- drivers/dma/qcom/bam_dma.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index c8a77b428b52..4b03415b8183 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -392,6 +393,7 @@ struct bam_device { const struct reg_offset_data *layout; struct clk *bamclk; + struct icc_path *mem_path; int irq; /* dma start transaction tasklet */ @@ -1284,6 +1286,14 @@ static int bam_dma_probe(struct platform_device *pdev) return ret; } + /* Ensure that interconnects are initialized */ + bdev->mem_path = devm_of_icc_get(bdev->dev, "memory"); + if (IS_ERR(bdev->mem_path)) { + ret = PTR_ERR(bdev->mem_path); + dev_err(bdev->dev, "failed to acquire icc path %d\n", ret); + goto err_disable_clk; + } + ret = bam_init(bdev); if (ret) goto err_disable_clk;