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Wed, 1 Mar 2023 09:52:37 -0800 Received: from xhdsneeli40.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2375.34 via Frontend Transport; Wed, 1 Mar 2023 11:52:34 -0600 From: Srinivas Neeli To: , , , , CC: , , , , , , Subject: [PATCH V2 1/4] MAINTAINERS: Add fragment for Xilinx watchdog driver Date: Wed, 1 Mar 2023 23:22:26 +0530 Message-ID: <20230301175229.342004-2-srinivas.neeli@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230301175229.342004-1-srinivas.neeli@amd.com> References: <20230301175229.342004-1-srinivas.neeli@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT025:EE_|CH3PR12MB8754:EE_ X-MS-Office365-Filtering-Correlation-Id: e8834737-0a67-4639-268b-08db1a7dbef3 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(136003)(376002)(39860400002)(346002)(396003)(451199018)(36840700001)(40470700004)(46966006)(356005)(36860700001)(81166007)(4326008)(82740400003)(82310400005)(8676002)(36756003)(86362001)(41300700001)(44832011)(7416002)(4744005)(5660300002)(8936002)(2906002)(40480700001)(70586007)(70206006)(40460700003)(336012)(186003)(1076003)(2616005)(26005)(47076005)(426003)(110136005)(316002)(478600001)(54906003)(6666004)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Mar 2023 17:52:37.9428 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e8834737-0a67-4639-268b-08db1a7dbef3 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT025.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8754 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Added entry for Xilinx xps-timebase watchdog driver. Signed-off-by: Srinivas Neeli --- MAINTAINERS | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 4b713407f887..7731e3ccac0e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -22982,6 +22982,14 @@ F: Documentation/devicetree/bindings/media/xilinx/ F: drivers/media/platform/xilinx/ F: include/uapi/linux/xilinx-v4l2-controls.h +XILINX WATCHDOG DRIVER +M: Srinivas Neeli +R: Shubhrajyoti Datta +R: Michal Simek +S: Maintained +F: Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml +F: drivers/watchdog/of_xilinx_wdt.c + XILINX XDMA DRIVER M: Lizhi Hou M: Brian Xu From patchwork Wed Mar 1 17:52:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Neeli X-Patchwork-Id: 13156273 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 C59EFC6FA9D for ; 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Wed, 1 Mar 2023 11:52:37 -0600 From: Srinivas Neeli To: , , , , CC: , , , , , , Subject: [PATCH V2 2/4] dt-bindings: watchdog: xlnx,versal-wwdt: Add versal watchdog bindings Date: Wed, 1 Mar 2023 23:22:27 +0530 Message-ID: <20230301175229.342004-3-srinivas.neeli@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230301175229.342004-1-srinivas.neeli@amd.com> References: <20230301175229.342004-1-srinivas.neeli@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT072:EE_|SN7PR12MB8004:EE_ X-MS-Office365-Filtering-Correlation-Id: b3825d9e-92c3-4b10-68b3-08db1a7dc138 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(346002)(39860400002)(396003)(136003)(376002)(451199018)(46966006)(40470700004)(36840700001)(110136005)(966005)(316002)(82310400005)(54906003)(86362001)(36756003)(40480700001)(40460700003)(44832011)(2906002)(4326008)(8676002)(36860700001)(5660300002)(1076003)(70586007)(70206006)(41300700001)(7416002)(426003)(6666004)(478600001)(2616005)(26005)(186003)(47076005)(83380400001)(336012)(81166007)(356005)(82740400003)(8936002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Mar 2023 17:52:41.7522 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b3825d9e-92c3-4b10-68b3-08db1a7dc138 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT072.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB8004 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Versal watchdog driver uses window watchdog mode. Window watchdog timer(WWDT) contains closed(first) and open(second) window with 32 bit width. Write to the watchdog timer within predefined window periods of time. This means a period that is not too soon and a period that is not too late. Updated devicetree bindings for adding versal window watchdog device. Signed-off-by: Srinivas Neeli --- Changes in V2: - Added watchdog ref - Removed timeout-sec property - Used 4 spaces for example indentation. --- .../bindings/watchdog/xlnx,versal-wwdt.yaml | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml diff --git a/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml new file mode 100644 index 000000000000..733de1ac60e8 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/xlnx,versal-wwdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Xilinx Versal window watchdog timer controller + +maintainers: + - Neeli Srinivas + +description: + Versal watchdog driver uses window watchdog mode. Window watchdog + timer(WWDT) contains closed(first) and open(second) window with + 32 bit width. Write to the watchdog timer within predefined window + periods of time. This means a period that is not too soon and a + period that is not too late. The WWDT has to be restarted within + the open window time. If software tries to restart WWDT outside of + the open window time period, it generates a reset. + +allOf: + - $ref: /schemas/watchdog/watchdog.yaml# + +properties: + compatible: + enum: + - xlnx,versal-wwdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + xlnx,close_percent: + $ref: "/schemas/types.yaml#/definitions/uint32" + minimum: 1 + maximum: 99 + default: 50 + description: closed window percentage + +required: + - compatible + - reg + - clocks + +unevaluatedProperties: false + +examples: + - | + watchdog@fd4d0000 { + compatible = "xlnx,versal-wwdt"; + reg = <0xfd4d0000 0x10000>; + clocks = <&clock25>; + timeout-sec = <30>; + xlnx,close_percent = <25>; + }; +... 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Mar 2023 17:52:45.0917 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e369f991-6840-41f8-fd26-08db1a7dc335 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT017.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB5020 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Versal watchdog driver uses window watchdog mode. Window watchdog timer(WWDT) contains closed(first) and open(second) window with 32 bit width. Write to the watchdog timer within predefined window periods of time. This means a period that is not too soon and a period that is not too late. The WWDT has to be restarted within the open window time. If software tries to restart WWDT outside of the open window time period, it generates a reset. Signed-off-by: Srinivas Neeli --- Changes in V2: - Takes "xlnx,close-percent" property from device tree parameter. - Removed clk_disable() function. - Removed module parameter permisions and using readomly. - Added check for close_percent( 0 < close_perecent < 100). - Updated other minor comments. --- drivers/watchdog/Kconfig | 18 +++ drivers/watchdog/Makefile | 1 + drivers/watchdog/xilinx_wwdt.c | 232 +++++++++++++++++++++++++++++++++ 3 files changed, 251 insertions(+) create mode 100644 drivers/watchdog/xilinx_wwdt.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index f0872970daf9..ec4b522ae29e 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -304,6 +304,24 @@ config XILINX_WATCHDOG To compile this driver as a module, choose M here: the module will be called of_xilinx_wdt. +config XILINX_WINDOW_WATCHDOG + tristate "Xilinx window watchdog timer" + depends on HAS_IOMEM + depends on ARM64 + select WATCHDOG_CORE + help + Window watchdog driver for the versal_wwdt IP core. + Window watchdog timer(WWDT) contains closed(first) and + open(second) window with 32 bit width. Write to the watchdog + timer within predefined window periods of time. This means + a period that is not too soon and a period that is not too + late. The WWDT has to be restarted within the open window time. + If software tries to restart WWDT outside of the open window + time period, it generates a reset. + + To compile this driver as a module, choose M here: the + module will be called xilinx_wwdt. + config ZIIRAVE_WATCHDOG tristate "Zodiac RAVE Watchdog Timer" depends on I2C diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 9cbf6580f16c..6cb5f1dfb492 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -157,6 +157,7 @@ obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o # MicroBlaze Architecture obj-$(CONFIG_XILINX_WATCHDOG) += of_xilinx_wdt.o +obj-$(CONFIG_XILINX_WINDOW_WATCHDOG) += xilinx_wwdt.o # MIPS Architecture obj-$(CONFIG_ATH79_WDT) += ath79_wdt.o diff --git a/drivers/watchdog/xilinx_wwdt.c b/drivers/watchdog/xilinx_wwdt.c new file mode 100644 index 000000000000..5b50376d1474 --- /dev/null +++ b/drivers/watchdog/xilinx_wwdt.c @@ -0,0 +1,232 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Window watchdog device driver for Xilinx Versal WWDT + * + * Copyright (C) 2022 - 2023, Advanced Micro Devices, Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define XWWDT_DEFAULT_TIMEOUT 40 +#define XWWDT_MIN_TIMEOUT 1 + +/* Register offsets for the WWDT device */ +#define XWWDT_MWR_OFFSET 0x00 +#define XWWDT_ESR_OFFSET 0x04 +#define XWWDT_FCR_OFFSET 0x08 +#define XWWDT_FWR_OFFSET 0x0c +#define XWWDT_SWR_OFFSET 0x10 + +/* Master Write Control Register Masks */ +#define XWWDT_MWR_MASK BIT(0) + +/* Enable and Status Register Masks */ +#define XWWDT_ESR_WINT_MASK BIT(16) +#define XWWDT_ESR_WSW_MASK BIT(8) +#define XWWDT_ESR_WEN_MASK BIT(0) + +#define XWWDT_CLOSE_WINDOW_PERCENT 50 + +static int xwwdt_timeout; + +module_param(xwwdt_timeout, int, 0); +MODULE_PARM_DESC(xwwdt_timeout, + "Watchdog time in seconds. (default=" + __MODULE_STRING(XWWDT_DEFAULT_TIMEOUT) ")"); + +/** + * struct xwwdt_device - Watchdog device structure + * @base: base io address of WDT device + * @spinlock: spinlock for IO register access + * @xilinx_wwdt_wdd: watchdog device structure + * @clk: struct clk * of a clock source + * @freq: source clock frequency of WWDT + * @close_percent : Closed window percent + */ +struct xwwdt_device { + void __iomem *base; + spinlock_t spinlock; /* spinlock for register handling */ + struct watchdog_device xilinx_wwdt_wdd; + struct clk *clk; + unsigned long freq; + u32 close_percent; +}; + +static int xilinx_wwdt_start(struct watchdog_device *wdd) +{ + struct xwwdt_device *xdev = watchdog_get_drvdata(wdd); + struct watchdog_device *xilinx_wwdt_wdd = &xdev->xilinx_wwdt_wdd; + u64 time_out, closed_timeout, open_timeout; + u32 control_status_reg; + + /* Calculate timeout count */ + time_out = xdev->freq * wdd->timeout; + + if (xdev->close_percent && xdev->close_percent < 100) { + closed_timeout = (time_out * xdev->close_percent) / 100; + open_timeout = time_out - closed_timeout; + wdd->min_hw_heartbeat_ms = xdev->close_percent * 10 * wdd->timeout; + } else { + /* Calculate XWWDT_CLOSE_WINDOW_PERCENT of timeout */ + time_out *= XWWDT_CLOSE_WINDOW_PERCENT; + time_out /= 100; + wdd->min_hw_heartbeat_ms = XWWDT_CLOSE_WINDOW_PERCENT * 10 * wdd->timeout; + } + + spin_lock(&xdev->spinlock); + + iowrite32(XWWDT_MWR_MASK, xdev->base + XWWDT_MWR_OFFSET); + iowrite32(~(u32)XWWDT_ESR_WEN_MASK, xdev->base + XWWDT_ESR_OFFSET); + + if (xdev->close_percent && xdev->close_percent < 100) { + iowrite32((u32)closed_timeout, xdev->base + XWWDT_FWR_OFFSET); + iowrite32((u32)open_timeout, xdev->base + XWWDT_SWR_OFFSET); + } else { + /* Configure closed and open windows with XWWDT_CLOSE_WINDOW_PERCENT of timeout */ + iowrite32((u32)time_out, xdev->base + XWWDT_FWR_OFFSET); + iowrite32((u32)time_out, xdev->base + XWWDT_SWR_OFFSET); + } + + /* Enable the window watchdog timer */ + control_status_reg = ioread32(xdev->base + XWWDT_ESR_OFFSET); + control_status_reg |= XWWDT_ESR_WEN_MASK; + iowrite32(control_status_reg, xdev->base + XWWDT_ESR_OFFSET); + + spin_unlock(&xdev->spinlock); + + dev_dbg(xilinx_wwdt_wdd->parent, "Watchdog Started!\n"); + + return 0; +} + +static int xilinx_wwdt_keepalive(struct watchdog_device *wdd) +{ + struct xwwdt_device *xdev = watchdog_get_drvdata(wdd); + u32 control_status_reg; + + spin_lock(&xdev->spinlock); + + /* Enable write access control bit for the window watchdog */ + iowrite32(XWWDT_MWR_MASK, xdev->base + XWWDT_MWR_OFFSET); + + /* Trigger restart kick to watchdog */ + control_status_reg = ioread32(xdev->base + XWWDT_ESR_OFFSET); + control_status_reg |= XWWDT_ESR_WSW_MASK; + iowrite32(control_status_reg, xdev->base + XWWDT_ESR_OFFSET); + + spin_unlock(&xdev->spinlock); + + return 0; +} + +static void xwwdt_clk_disable_unprepare(void *data) +{ + clk_disable_unprepare(data); +} + +static const struct watchdog_info xilinx_wwdt_ident = { + .options = WDIOF_KEEPALIVEPING | + WDIOF_SETTIMEOUT, + .firmware_version = 1, + .identity = "xlnx_window watchdog", +}; + +static const struct watchdog_ops xilinx_wwdt_ops = { + .owner = THIS_MODULE, + .start = xilinx_wwdt_start, + .ping = xilinx_wwdt_keepalive, +}; + +static int xwwdt_probe(struct platform_device *pdev) +{ + struct watchdog_device *xilinx_wwdt_wdd; + struct device *dev = &pdev->dev; + struct xwwdt_device *xdev; + int ret; + + xdev = devm_kzalloc(dev, sizeof(*xdev), GFP_KERNEL); + if (!xdev) + return -ENOMEM; + + xilinx_wwdt_wdd = &xdev->xilinx_wwdt_wdd; + xilinx_wwdt_wdd->info = &xilinx_wwdt_ident; + xilinx_wwdt_wdd->ops = &xilinx_wwdt_ops; + xilinx_wwdt_wdd->parent = dev; + + xdev->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(xdev->base)) + return PTR_ERR(xdev->base); + + xdev->clk = devm_clk_get(dev, NULL); + if (IS_ERR(xdev->clk)) + return PTR_ERR(xdev->clk); + + xdev->freq = clk_get_rate(xdev->clk); + if (!xdev->freq) + return -EINVAL; + + ret = clk_prepare_enable(xdev->clk); + if (ret) { + dev_err(dev, "unable to enable clock\n"); + return ret; + } + + ret = devm_add_action_or_reset(dev, xwwdt_clk_disable_unprepare, + xdev->clk); + if (ret) + return ret; + + ret = of_property_read_u32(dev->of_node, "xlnx,close-percent", + &xdev->close_percent); + if (ret) + xdev->close_percent = XWWDT_CLOSE_WINDOW_PERCENT; + + xilinx_wwdt_wdd->timeout = XWWDT_DEFAULT_TIMEOUT; + xilinx_wwdt_wdd->min_timeout = XWWDT_MIN_TIMEOUT; + xilinx_wwdt_wdd->max_hw_heartbeat_ms = 1000 * xilinx_wwdt_wdd->timeout; + + ret = watchdog_init_timeout(xilinx_wwdt_wdd, + xwwdt_timeout, &pdev->dev); + if (ret) + dev_info(&pdev->dev, "Configured default timeout value\n"); + + spin_lock_init(&xdev->spinlock); + watchdog_set_drvdata(xilinx_wwdt_wdd, xdev); + watchdog_set_nowayout(xilinx_wwdt_wdd, WATCHDOG_NOWAYOUT); + + ret = devm_watchdog_register_device(dev, xilinx_wwdt_wdd); + if (ret) + return ret; + + dev_info(dev, "Xilinx window watchdog Timer with timeout %ds\n", + xilinx_wwdt_wdd->timeout); + + return 0; +} + +static const struct of_device_id xwwdt_of_match[] = { + { .compatible = "xlnx,versal-wwdt", }, + {}, +}; +MODULE_DEVICE_TABLE(of, xwwdt_of_match); + +static struct platform_driver xwwdt_driver = { + .probe = xwwdt_probe, + .driver = { + .name = "Xilinx window watchdog", + .of_match_table = xwwdt_of_match, + }, +}; + +module_platform_driver(xwwdt_driver); + +MODULE_AUTHOR("Neeli Srinivas "); +MODULE_DESCRIPTION("Xilinx window watchdog driver"); +MODULE_LICENSE("GPL"); From patchwork Wed Mar 1 17:52:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Neeli X-Patchwork-Id: 13156275 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 8963BC7EE32 for ; Wed, 1 Mar 2023 17:53:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229591AbjCARxK (ORCPT ); Wed, 1 Mar 2023 12:53:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229956AbjCARxB (ORCPT ); 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Mar 2023 17:52:49.3841 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8e81c67e-1519-4f5f-f447-08db1a7dc5c4 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT035.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4418 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Added entry for Xilinx versal watchdog driver. Signed-off-by: Srinivas Neeli --- MAINTAINERS | 2 ++ 1 file changed, 2 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 7731e3ccac0e..77a8cff9ef03 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -22987,8 +22987,10 @@ M: Srinivas Neeli R: Shubhrajyoti Datta R: Michal Simek S: Maintained +F: Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml F: Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml F: drivers/watchdog/of_xilinx_wdt.c +F: drivers/watchdog/xilinx_wwdt.c XILINX XDMA DRIVER M: Lizhi Hou