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Thu, 27 Feb 2025 10:57:21 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 193.8.40.94) smtp.mailfrom=leica-geosystems.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=leica-geosystems.com; Received-SPF: Pass (protection.outlook.com: domain of leica-geosystems.com designates 193.8.40.94 as permitted sender) receiver=protection.outlook.com; client-ip=193.8.40.94; helo=hexagon.com; pr=C Received: from hexagon.com (193.8.40.94) by DB1PEPF000509ED.mail.protection.outlook.com (10.167.242.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8489.16 via Frontend Transport; Thu, 27 Feb 2025 10:57:21 +0000 Received: from aherlnxbspsrv01.lgs-net.com ([10.60.34.116]) by hexagon.com with Microsoft SMTPSVC(10.0.17763.1697); Thu, 27 Feb 2025 11:57:20 +0100 From: Catalin Popescu To: neeraj.sanjaykale@nxp.com, marcel@holtmann.org, luiz.dentz@gmail.com, robh@kernel.org, krzk+dt@kernel.org, loic.poulain@linaro.org Cc: linux-bluetooth@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, m.felsch@pengutronix.de, amitkumar.karwar@nxp.com, conor+dt@kernel.org, Catalin Popescu Subject: [PATCH next v2 2/2] bluetooth: btnxpuart: implement powerup sequence Date: Thu, 27 Feb 2025 11:57:18 +0100 Message-Id: <20250227105718.1692639-2-catalin.popescu@leica-geosystems.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250227105718.1692639-1-catalin.popescu@leica-geosystems.com> References: <20250227105718.1692639-1-catalin.popescu@leica-geosystems.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-OriginalArrivalTime: 27 Feb 2025 10:57:20.0577 (UTC) FILETIME=[5FB07310:01DB8906] X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DB1PEPF000509ED:EE_|VI1PR06MB6799:EE_ X-MS-Office365-Filtering-Correlation-Id: d41df6e7-f69e-489d-5295-08dd571d8282 X-SET-LOWER-SCL-SCANNER: YES X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|1800799024|82310400026; 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X-OriginatorOrg: leica-geosystems.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Feb 2025 10:57:21.0318 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d41df6e7-f69e-489d-5295-08dd571d8282 X-MS-Exchange-CrossTenant-Id: 1b16ab3e-b8f6-4fe3-9f3e-2db7fe549f6a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=1b16ab3e-b8f6-4fe3-9f3e-2db7fe549f6a;Ip=[193.8.40.94];Helo=[hexagon.com] X-MS-Exchange-CrossTenant-AuthSource: DB1PEPF000509ED.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR06MB6799 NXP bluetooth chip shares power supply and reset gpio with a WLAN chip. Add support for power supply and reset and enforce powerup sequence: - apply power supply - deassert reset/powerdown Signed-off-by: Catalin Popescu Reviewed-by: Neeraj Sanjay Kale --- v2: - rebase on linux-next tag next-20250227 - add reviewed-by --- drivers/bluetooth/btnxpuart.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c index 4f2f429c9800..81d1c9b97146 100644 --- a/drivers/bluetooth/btnxpuart.c +++ b/drivers/bluetooth/btnxpuart.c @@ -17,6 +17,8 @@ #include #include #include +#include +#include #include #include @@ -191,6 +193,7 @@ struct btnxpuart_dev { struct ps_data psdata; struct btnxpuart_data *nxp_data; + struct reset_control *pdn; }; #define NXP_V1_FW_REQ_PKT 0xa5 @@ -1522,6 +1525,7 @@ static int nxp_serdev_probe(struct serdev_device *serdev) { struct hci_dev *hdev; struct btnxpuart_dev *nxpdev; + int err; nxpdev = devm_kzalloc(&serdev->dev, sizeof(*nxpdev), GFP_KERNEL); if (!nxpdev) @@ -1549,6 +1553,16 @@ static int nxp_serdev_probe(struct serdev_device *serdev) crc8_populate_msb(crc8_table, POLYNOMIAL8); + nxpdev->pdn = devm_reset_control_get_optional_shared(&serdev->dev, NULL); + if (IS_ERR(nxpdev->pdn)) + return PTR_ERR(nxpdev->pdn); + + err = devm_regulator_get_enable(&serdev->dev, "vcc"); + if (err) { + dev_err(&serdev->dev, "Failed to enable vcc regulator\n"); + return err; + } + /* Initialize and register HCI device */ hdev = hci_alloc_dev(); if (!hdev) { @@ -1556,6 +1570,8 @@ static int nxp_serdev_probe(struct serdev_device *serdev) return -ENOMEM; } + reset_control_deassert(nxpdev->pdn); + nxpdev->hdev = hdev; hdev->bus = HCI_UART; @@ -1583,6 +1599,7 @@ static int nxp_serdev_probe(struct serdev_device *serdev) return 0; probe_fail: + reset_control_assert(nxpdev->pdn); hci_free_dev(hdev); return -ENODEV; } @@ -1609,6 +1626,7 @@ static void nxp_serdev_remove(struct serdev_device *serdev) } ps_cleanup(nxpdev); hci_unregister_dev(hdev); + reset_control_assert(nxpdev->pdn); hci_free_dev(hdev); }