From patchwork Fri Oct 4 12:19:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neeraj Sanjay Kale X-Patchwork-Id: 832814 Received: from DB3PR0202CU003.outbound.protection.outlook.com (mail-northeuropeazon11011064.outbound.protection.outlook.com [52.101.65.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C714158531; Fri, 4 Oct 2024 12:18:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.65.64 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728044333; cv=fail; b=sA1+xkUslZF2uCjJ3JpFMcwsfud9RkFv614Nh8ghrx65kZUEUyp4A9Iia1pXElg021kQS7yxxOj3xBe+4W4rEZkaCRquGzJ2EEZPVNXEcYg4c6jLp5tby0WjHSY75M4Vf2Jr8YxGNjae6ifbS9JAo6ymJ9hceFsCpPw9efhNtvw= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728044333; c=relaxed/simple; bh=k1iiNseEzEQV7Nm5rJ8OZ7bfkb56bye9KOao6z4vb4Y=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Content-Type:MIME-Version; b=uFuhZ1ngkHM5SEy/FVuR0ml2c89L3TfMGGC+FsbBzKtYSqvXMH79UJjg5BqKeC3F7zZezzPDhUfUd+m3fhwvcz5uUbbjRrW9Fcb7kiJHtdpYCpGqOxEPamfPIRLt/RZE13ygVZ6wUVV0vVZHauGhPNR3abm1hJfhAadruWK4ac8= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com; spf=pass smtp.mailfrom=nxp.com; dkim=pass (2048-bit key) header.d=nxp.com header.i=@nxp.com header.b=NpnoR/g5; arc=fail smtp.client-ip=52.101.65.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nxp.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=nxp.com header.i=@nxp.com header.b="NpnoR/g5" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=mkjEpSWesA2wFI+iNneeKqna8Z1Cr4b/w7M0jls0bsY5YDGa3T23hY768EujrKqviheBfZt6TtqPHdBC7tGaF51fxlhxMLG7xFcPbFgyW42DdnFs/Rc+RHBkd8zBFnFzJ4kPJ0a5N/bvV+C5WCXDrx0fOft2OyXrP5026ESrjQOkMfyoBQGXiKknKgLgamE0Hn9E4H8TPcbixQ6XlRtSV1TUMy+MecdxC2kS1xsod/cLgpcFrohMvvl3UFkmXbQKCkFDlCRgPA+phnmot+E+yIKzrcxInoGzRvjSbfy713nH6sWatjPUlzqTlAonznc/7atEcvXOV1IMIcT3niLdWg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=+OAr0c1W0uSnDi68sMu/rsE9VRoTByEayn+yFgcInTU=; b=VhxLSXdyIzpOxKm6RCctSlWXaJu/veIzM1J79KEv9VmHKRlcoko/GorAeqj9JwHtv8fCRzDp0MMOIS/mWVuEzlewIulf8Qp6y77qNxyncgyi43LfRZa6IZA50FNjg5dtxK1kVOXNiwsjzmiRrJ8g2J8QLqFzHG9nAJbhphy0QKCk61aY2ugUUoFgosdwbYPhzBen4uV22MFdyd5jfRvdr4sKk98ZzVEGkkoNWwczslUkdKHanwgw5Q+nULkC9KlErLeqaxNZu/SPhyJcpZ7IMyN9A3dzR3q2dxhAILDR+m/giVR3CkGUHL1kI+Vyd9CEyRwyWyP2GmReAt23enCJhw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=+OAr0c1W0uSnDi68sMu/rsE9VRoTByEayn+yFgcInTU=; b=NpnoR/g5Nn/5ELQ9RymKIaWsSWFcRZPUhKQb6Q2fDIfLBW5/57CPtM4q4GFiLM/XuxUXgHl4f72nha3ZThGHfjEaadk+HATO1mOfdKFCJmFB+Kv0DsmVIz++vKKuIvhGfZ6sayvoe6wbhaim2maXDQHz0wMviOo2CzSlZxli3EK2zZu1NV+jhA7i+zh4FLCWqlL7m+fy7PqhLqYQ6Cp2ufCHn/Ztyxi3u9/+aiJ0sfDlhNLeDm/XUNKOZM7yUM0fNIGgg9rphfNkKZVhTKQy9RPKM4VgjYIh2V6oz1De0iCmcwcMluVq8w1aLRj33kabqVwx+OeLwzU4JejraSu5hw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AS4PR04MB9692.eurprd04.prod.outlook.com (2603:10a6:20b:4fe::20) by GV1PR04MB10242.eurprd04.prod.outlook.com (2603:10a6:150:1a8::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8026.18; Fri, 4 Oct 2024 12:18:48 +0000 Received: from AS4PR04MB9692.eurprd04.prod.outlook.com ([fe80::a2bf:4199:6415:f299]) by AS4PR04MB9692.eurprd04.prod.outlook.com ([fe80::a2bf:4199:6415:f299%5]) with mapi id 15.20.8026.017; Fri, 4 Oct 2024 12:18:48 +0000 From: Neeraj Sanjay Kale To: marcel@holtmann.org, luiz.dentz@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, amitkumar.karwar@nxp.com, rohit.fule@nxp.com, neeraj.sanjaykale@nxp.com, sherry.sun@nxp.com, ziniu.wang_1@nxp.com, haibo.chen@nxp.com, LnxRevLi@nxp.com Subject: [PATCH v3 2/2] Bluetooth: btnxpuart: Add GPIO support to power save feature Date: Fri, 4 Oct 2024 17:49:41 +0530 Message-Id: <20241004121941.572539-3-neeraj.sanjaykale@nxp.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241004121941.572539-1-neeraj.sanjaykale@nxp.com> References: <20241004121941.572539-1-neeraj.sanjaykale@nxp.com> X-ClientProxiedBy: SI1PR02CA0060.apcprd02.prod.outlook.com (2603:1096:4:1f5::17) To AS4PR04MB9692.eurprd04.prod.outlook.com (2603:10a6:20b:4fe::20) Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS4PR04MB9692:EE_|GV1PR04MB10242:EE_ X-MS-Office365-Filtering-Correlation-Id: f19ef2c1-7616-4542-04f9-08dce46eb2da X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|52116014|366016|376014|38350700014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:AS4PR04MB9692.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230040)(1800799024)(52116014)(366016)(376014)(38350700014); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: f19ef2c1-7616-4542-04f9-08dce46eb2da X-MS-Exchange-CrossTenant-AuthSource: AS4PR04MB9692.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Oct 2024 12:18:47.9505 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: aeiFjU3M7M1kZTg/KYpKFKHxXQugGQjET6Zz464UkDx5hNUN1RXZkSmRNh8qqOeeCjBslI5ZObRbGfZyt91A/rMj/IszlkKfG9+czdaOBf0= X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV1PR04MB10242 This adds support for driving the chip into sleep or wakeup with a GPIO. If the device tree property device-wakeup-gpios is defined, the driver utilizes this GPIO for controlling the chip's power save state, else it uses the default UART-break method. Signed-off-by: Neeraj Sanjay Kale --- v3: Remove GPIO toggling in ps_init(). (Shenwei Wang) --- drivers/bluetooth/btnxpuart.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c index 2b8a07c745c9..4b7e8b7c522a 100644 --- a/drivers/bluetooth/btnxpuart.c +++ b/drivers/bluetooth/btnxpuart.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -82,6 +83,7 @@ #define WAKEUP_METHOD_BREAK 1 #define WAKEUP_METHOD_EXT_BREAK 2 #define WAKEUP_METHOD_RTS 3 +#define WAKEUP_METHOD_GPIO 4 #define WAKEUP_METHOD_INVALID 0xff /* power save mode status */ @@ -135,6 +137,7 @@ struct ps_data { bool driver_sent_cmd; u16 h2c_ps_interval; u16 c2h_ps_interval; + struct gpio_desc *h2c_ps_gpio; struct hci_dev *hdev; struct work_struct work; struct timer_list ps_timer; @@ -365,7 +368,7 @@ static void ps_control(struct hci_dev *hdev, u8 ps_state) { struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); struct ps_data *psdata = &nxpdev->psdata; - int status; + int status = 0; if (psdata->ps_state == ps_state || !test_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state)) @@ -373,6 +376,12 @@ static void ps_control(struct hci_dev *hdev, u8 ps_state) mutex_lock(&psdata->ps_lock); switch (psdata->cur_h2c_wakeupmode) { + case WAKEUP_METHOD_GPIO: + if (ps_state == PS_STATE_AWAKE) + gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 0); + else + gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 1); + break; case WAKEUP_METHOD_DTR: if (ps_state == PS_STATE_AWAKE) status = serdev_device_set_tiocm(nxpdev->serdev, TIOCM_DTR, 0); @@ -425,8 +434,13 @@ static void ps_timeout_func(struct timer_list *t) static void ps_setup(struct hci_dev *hdev) { struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); + struct serdev_device *serdev = nxpdev->serdev; struct ps_data *psdata = &nxpdev->psdata; + psdata->h2c_ps_gpio = devm_gpiod_get(&serdev->dev, "device-wakeup", GPIOD_OUT_LOW); + if (IS_ERR(psdata->h2c_ps_gpio)) + psdata->h2c_wakeup_gpio = 0xff; + psdata->hdev = hdev; INIT_WORK(&psdata->work, ps_work_func); mutex_init(&psdata->ps_lock); @@ -516,6 +530,9 @@ static int send_wakeup_method_cmd(struct hci_dev *hdev, void *data) pcmd.c2h_wakeupmode = psdata->c2h_wakeupmode; pcmd.c2h_wakeup_gpio = psdata->c2h_wakeup_gpio; switch (psdata->h2c_wakeupmode) { + case WAKEUP_METHOD_GPIO: + pcmd.h2c_wakeupmode = BT_CTRL_WAKEUP_METHOD_GPIO; + break; case WAKEUP_METHOD_DTR: pcmd.h2c_wakeupmode = BT_CTRL_WAKEUP_METHOD_DSR; break; @@ -550,6 +567,7 @@ static void ps_init(struct hci_dev *hdev) { struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev); struct ps_data *psdata = &nxpdev->psdata; + u8 default_h2c_wakeup_mode = DEFAULT_H2C_WAKEUP_MODE; serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_RTS); usleep_range(5000, 10000); @@ -561,8 +579,17 @@ static void ps_init(struct hci_dev *hdev) psdata->c2h_wakeup_gpio = 0xff; psdata->cur_h2c_wakeupmode = WAKEUP_METHOD_INVALID; + if (!IS_ERR(psdata->h2c_ps_gpio)) + default_h2c_wakeup_mode = WAKEUP_METHOD_GPIO; + psdata->h2c_ps_interval = PS_DEFAULT_TIMEOUT_PERIOD_MS; - switch (DEFAULT_H2C_WAKEUP_MODE) { + + switch (default_h2c_wakeup_mode) { + case WAKEUP_METHOD_GPIO: + psdata->h2c_wakeupmode = WAKEUP_METHOD_GPIO; + gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 0); + usleep_range(5000, 10000); + break; case WAKEUP_METHOD_DTR: psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR; serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_DTR); @@ -1279,6 +1306,9 @@ static int nxp_enqueue(struct hci_dev *hdev, struct sk_buff *skb) psdata->c2h_wakeup_gpio = wakeup_parm.c2h_wakeup_gpio; psdata->h2c_wakeup_gpio = wakeup_parm.h2c_wakeup_gpio; switch (wakeup_parm.h2c_wakeupmode) { + case BT_CTRL_WAKEUP_METHOD_GPIO: + psdata->h2c_wakeupmode = WAKEUP_METHOD_GPIO; + break; case BT_CTRL_WAKEUP_METHOD_DSR: psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR; break;