From patchwork Mon Feb 28 22:53:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 547383 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 4B065C3525B for ; Mon, 28 Feb 2022 22:58:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231659AbiB1W7d (ORCPT ); Mon, 28 Feb 2022 17:59:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231569AbiB1W7b (ORCPT ); Mon, 28 Feb 2022 17:59:31 -0500 Received: from mo4-p01-ob.smtp.rzone.de (mo4-p01-ob.smtp.rzone.de [85.215.255.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB10DA41B2; Mon, 28 Feb 2022 14:58:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1646088947; 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=6QtiDtoRb+0unR4ATY8ygChkhFlrPo5rBKJ8ZschNIs=; b=p5DfGdrYhWDRnNfYEDTPR3zctNZ76/M3aAAAsYbcTjXvo1vB+qWuQEeTHvSls2DZ9Z aYEhSY6Z38UtvrEGm0YNGvsdvgg0i78obnvQ5LCCOKS5/wWzpOa4lL/rjo1zgE5UC8Y3 qBJNMqYbGHlfdKJEOCN64HodvKezN0zwcabTOiGMr9bBOBzucMsHlHzJAG3YvoWALE9m 9sf93jUbDI0Xu4uqrHROZlL0jnph+g8lW0bBy133qhRg1/ErpSgtbt+1UhpcIpANZh5Y wZ03NRAk8V/mttcT9wSjR1LcoZch7AdmeaVhxIACcMfJe2b067+fziyE82R6UE4Ox/Ms l9+Q== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXQ7UOGqRde+a0fyL/oVo=" X-RZG-CLASS-ID: mo00 Received: from droid.. by smtp.strato.de (RZmta 47.40.1 AUTH) with ESMTPSA id kdc58dy1SMtlWqF (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Mon, 28 Feb 2022 23:55:47 +0100 (CET) From: Stephan Gerhold To: Bjorn Andersson Cc: Andy Gross , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Mathieu Poirier , linux-remoteproc@vger.kernel.org, phone-devel@vger.kernel.org, Aleksander Morgado , Stephan Gerhold Subject: [PATCH v2 1/2] remoteproc: qcom_q6v5_mss: Create platform device for BAM-DMUX Date: Mon, 28 Feb 2022 23:53:59 +0100 Message-Id: <20220228225400.146555-2-stephan@gerhold.net> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220228225400.146555-1-stephan@gerhold.net> References: <20220228225400.146555-1-stephan@gerhold.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The modem remoteproc on older Qualcomm SoCs (e.g. MSM8916 and MSM8974) implements the BAM-DMUX protocol to allow access to the network data channels of the modem. The hardware/firmware resources required to implement the BAM-DMUX driver are described in an extra node in the device tree (with the compatible "qcom,bam-dmux"). This node logically belongs below the modem remoteproc, so that both control interfaces (rpmsg_wwan_ctrl) and network interfaces (bam_dmux) have a common parent. Unlike other child devices of the modem remoteproc, the bam-dmux device currently does not follow the state of the remoteproc (i.e. it is not added/removed when the remoteproc is started/stopped). However, this is an implementation detail of the bam_dmux driver in Linux that might change in the future. To be flexible for future changes, create a standard platform device specifically only for "qcom,bam-dmux", rather than populating all child nodes. This is also more consistent with the way the other child nodes are handled in the driver. Note: of_platform_device_create() and of_node_put() have NULL-checks internally, so there is no need to check if the "qcom,bam-dmux" node actually exists in the device tree. Signed-off-by: Stephan Gerhold --- Changes in v2: - Avoid using of_platform_populate() and create platform device specifically only for "qcom,bam-dmux". --- drivers/remoteproc/qcom_q6v5_mss.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c index a2c231a17b2b..b2e57981de2c 100644 --- a/drivers/remoteproc/qcom_q6v5_mss.c +++ b/drivers/remoteproc/qcom_q6v5_mss.c @@ -218,6 +218,7 @@ struct q6v5 { struct qcom_rproc_subdev smd_subdev; struct qcom_rproc_ssr ssr_subdev; struct qcom_sysmon *sysmon; + struct platform_device *bam_dmux; bool need_mem_protection; bool has_alt_reset; bool has_mba_logs; @@ -1847,6 +1848,7 @@ static int q6v5_alloc_memory_region(struct q6v5 *qproc) static int q6v5_probe(struct platform_device *pdev) { const struct rproc_hexagon_res *desc; + struct device_node *node; struct q6v5 *qproc; struct rproc *rproc; const char *mba_image; @@ -1990,6 +1992,10 @@ static int q6v5_probe(struct platform_device *pdev) if (ret) goto remove_sysmon_subdev; + node = of_get_compatible_child(pdev->dev.of_node, "qcom,bam-dmux"); + qproc->bam_dmux = of_platform_device_create(node, NULL, &pdev->dev); + of_node_put(node); + return 0; remove_sysmon_subdev: @@ -2011,6 +2017,8 @@ static int q6v5_remove(struct platform_device *pdev) struct q6v5 *qproc = platform_get_drvdata(pdev); struct rproc *rproc = qproc->rproc; + if (qproc->bam_dmux) + of_platform_device_destroy(&qproc->bam_dmux->dev, NULL); rproc_del(rproc); qcom_q6v5_deinit(&qproc->q6v5);