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Wed, 22 Sep 2021 04:11:36 -0700 Envelope-to: git@xilinx.com, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, gregkh@linuxfoundation.org, shubhrajyoti.datta@gmail.com Received: from [10.140.6.39] (port=42856 helo=xhdsgoud40.xilinx.com) by smtp.xilinx.com with esmtp (Exim 4.90) (envelope-from ) id 1mT0A1-0005wf-VN; Wed, 22 Sep 2021 04:11:34 -0700 From: Shubhrajyoti Datta To: CC: , , , , Shubhrajyoti Datta Subject: [PATCH v3 1/2] dt-binding: usb: xilinx: Add clocking node Date: Wed, 22 Sep 2021 16:41:25 +0530 Message-ID: <625a34188da7fcc4132b8717afd3d69e6bdc3316.1632307026.git.shubhrajyoti.datta@xilinx.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: a07b3f2f-b1d9-4416-d34a-08d97db9bf92 X-MS-TrafficTypeDiagnostic: BN6PR02MB2788: X-Microsoft-Antispam-PRVS: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-Oob-TLC-OOBClassifiers: OLM:1079; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Sep 2021 11:11:38.5168 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a07b3f2f-b1d9-4416-d34a-08d97db9bf92 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch01.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT0032.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR02MB2788 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add a clocking node for xilinx udc. Signed-off-by: Shubhrajyoti Datta --- Documentation/devicetree/bindings/usb/xlnx,usb2.yaml | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/xlnx,usb2.yaml b/Documentation/devicetree/bindings/usb/xlnx,usb2.yaml index b8acc415eaf1..39213806ac79 100644 --- a/Documentation/devicetree/bindings/usb/xlnx,usb2.yaml +++ b/Documentation/devicetree/bindings/usb/xlnx,usb2.yaml @@ -24,6 +24,14 @@ properties: If present, hardware has dma capability. type: boolean + clocks: + minItems: 1 + + clock-name: + const: "s_axi_aclk" + description: | + Input clock name. + required: - compatible - reg From patchwork Wed Sep 22 11:11:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shubhrajyoti Datta X-Patchwork-Id: 12510277 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,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 ED599C433FE for ; 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Wed, 22 Sep 2021 04:11:37 -0700 From: Shubhrajyoti Datta To: CC: , , , , Shubhrajyoti Datta Subject: [PATCH v3 2/2] usb: gadget: udc-xilinx: Add clock support Date: Wed, 22 Sep 2021 16:41:26 +0530 Message-ID: <7c3386d2f2b315fa6e248fc664efefb9a2de35e9.1632307026.git.shubhrajyoti.datta@xilinx.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 643c7179-0f94-44cf-5ca9-08d97db9d29e X-MS-TrafficTypeDiagnostic: BYAPR02MB4741: X-Microsoft-Antispam-PRVS: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-Oob-TLC-OOBClassifiers: OLM:962; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:149.199.62.198;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:xsj-pvapexch02.xlnx.xilinx.com;PTR:unknown-62-198.xilinx.com;CAT:NONE;SFS:(4636009)(46966006)(36840700001)(44832011)(7696005)(6916009)(7636003)(4326008)(5660300002)(2616005)(356005)(2906002)(70206006)(82310400003)(8676002)(8936002)(36860700001)(316002)(70586007)(54906003)(47076005)(508600001)(107886003)(426003)(186003)(6666004)(36906005)(9786002)(26005)(83380400001)(336012)(36756003)(102446001);DIR:OUT;SFP:1101; X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Sep 2021 11:12:10.4192 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 643c7179-0f94-44cf-5ca9-08d97db9d29e X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.62.198];Helo=[xsj-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: BN1NAM02FT004.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR02MB4741 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Currently the driver depends on the bootloader to enable the clocks. Add support for clocking. The patch enables the clock at probe and disables them at remove. Signed-off-by: Shubhrajyoti Datta Acked-by: Felipe Balbi --- v3: Add dev_warn drivers/usb/gadget/udc/udc-xilinx.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/usb/gadget/udc/udc-xilinx.c b/drivers/usb/gadget/udc/udc-xilinx.c index fb4ffedd6f0d..f5ca670776a3 100644 --- a/drivers/usb/gadget/udc/udc-xilinx.c +++ b/drivers/usb/gadget/udc/udc-xilinx.c @@ -11,6 +11,7 @@ * USB peripheral controller (at91_udc.c). */ +#include #include #include #include @@ -171,6 +172,7 @@ struct xusb_ep { * @addr: the usb device base address * @lock: instance of spinlock * @dma_enabled: flag indicating whether the dma is included in the system + * @clk: pointer to struct clk * @read_fn: function pointer to read device registers * @write_fn: function pointer to write to device registers */ @@ -188,6 +190,7 @@ struct xusb_udc { void __iomem *addr; spinlock_t lock; bool dma_enabled; + struct clk *clk; unsigned int (*read_fn)(void __iomem *); void (*write_fn)(void __iomem *, u32, u32); @@ -2092,6 +2095,27 @@ static int xudc_probe(struct platform_device *pdev) udc->gadget.ep0 = &udc->ep[XUSB_EP_NUMBER_ZERO].ep_usb; udc->gadget.name = driver_name; + udc->clk = devm_clk_get(&pdev->dev, "s_axi_aclk"); + if (IS_ERR(udc->clk)) { + if (PTR_ERR(udc->clk) != -ENOENT) { + ret = PTR_ERR(udc->clk); + goto fail; + } + + /* + * Clock framework support is optional, continue on, + * anyways if we don't find a matching clock + */ + dev_warn(&pdev->dev, "s_axi_aclk clock property is not found\n"); + udc->clk = NULL; + } + + ret = clk_prepare_enable(udc->clk); + if (ret) { + dev_err(&pdev->dev, "Unable to enable clock.\n"); + return ret; + } + spin_lock_init(&udc->lock); /* Check for IP endianness */ @@ -2147,6 +2171,7 @@ static int xudc_remove(struct platform_device *pdev) struct xusb_udc *udc = platform_get_drvdata(pdev); usb_del_gadget_udc(&udc->gadget); + clk_disable_unprepare(udc->clk); return 0; }