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Thu, 3 Sep 2026 00:19:46 -0700 From: Wayne Chang To: Vinod Koul , JC Kuo , Thierry Reding , Jonathan Hunter , "Neil Armstrong" , Manivannan Sadhasivam , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , , Sing-Han Chen , Wayne Chang Subject: [PATCH V3 2/4] phy: tegra: xusb: Use devm_clk_get_optional to fetch USB2 tracking clock Date: Thu, 3 Sep 2026 15:19:35 +0800 Message-ID: <20260903071937.533646-3-waynec@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260903071937.533646-1-waynec@nvidia.com> References: <20260903071937.533646-1-waynec@nvidia.com> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF00018548:EE_|SA5PPFB9BA66B77:EE_ X-MS-Office365-Filtering-Correlation-Id: edcd3bb4-b2a2-4020-298c-08df098bc453 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|1800799024|36860700016|82310400026|23010399003|18002099003|22082099003|11063799006|10067099003|56012099006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: EFgp58/87tZh1Y6j/lCVNxGq0evM5zGSWWWMKLnDmOUE4BDlCBMjmHo4dyDIjNwiG/1mr9loXyqc3Nx/lw6d5CMuX+TjVX+u5SxTL+QOuTD6m1nMyUvKZn3PyVUg+zLzP5ZhPxwGXts7dzyWcW6MJsl0PIMejKXroB0WQTWUKal0D05VzXH9e7GgAx3woUB932f6455aGwu94WA41p+TwQZ8GkbTafLu8W+v++SNWP63/WjdkQFEwqi9notZiueXTnAPaeaqTyF2xJ6Yr/gQ+CTdGVq9tthwndljJW7oTeIrlqLHpRRNVtla28lx8z9dlxgsD0hoooiFjk4WOl2Px8gI8mKvk4ESUaWEgoZYDZSm4O1DtM82fSMaM5lINGwHS+28u6ddqBsn1UCFJH9/LhGyQYdX1fA4Qybq7tA/9t4hssgYR3QoxmJj89rbJ0Jp X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Sep 2026 07:20:00.6956 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: edcd3bb4-b2a2-4020-298c-08df098bc453 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF00018548.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA5PPFB9BA66B77 From: Sing-Han Chen The USB2 PAD tracking clock is an optional clock so use devm_clk_get_optional() so a missing clock in devicetree is represented as NULL and probe can continue. clk_prepare_enable() and clk_disable_unprepare() already treat a NULL clock as a no-op. Signed-off-by: Sing-Han Chen Signed-off-by: Wayne Chang --- V2 -> V3: No change V1 -> V2: No change drivers/phy/tegra/xusb-tegra186.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c index 60156aea2707..800be0cbb3f9 100644 --- a/drivers/phy/tegra/xusb-tegra186.c +++ b/drivers/phy/tegra/xusb-tegra186.c @@ -1045,7 +1045,7 @@ tegra186_usb2_pad_probe(struct tegra_xusb_padctl *padctl, goto out; } - priv->usb2_trk_clk = devm_clk_get(&pad->dev, "trk"); + priv->usb2_trk_clk = devm_clk_get_optional(&pad->dev, "trk"); if (IS_ERR(priv->usb2_trk_clk)) { err = PTR_ERR(priv->usb2_trk_clk); dev_dbg(&pad->dev, "failed to get usb2 trk clock: %d\n", err); -- 2.25.1