From patchwork Wed Nov 13 10:48:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akash Asthana X-Patchwork-Id: 11241671 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BA57E14E5 for ; Wed, 13 Nov 2019 10:49:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9AF14222BD for ; Wed, 13 Nov 2019 10:49:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="CBsSAS9M"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="a8mmcVgW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727142AbfKMKtN (ORCPT ); Wed, 13 Nov 2019 05:49:13 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:56284 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726138AbfKMKtM (ORCPT ); Wed, 13 Nov 2019 05:49:12 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 6C86960592; Wed, 13 Nov 2019 10:49:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1573642151; bh=bXxQtYvurhAVLIzAS+o22RaXGTA/pMMVi2RYqvEjxcw=; h=From:To:Cc:Subject:Date:From; b=CBsSAS9MUoGFqg0z6augI8jCg/omhhM2aqoSxaKmJ8XkgzxL2CnH8VeYJ76Toi7E9 tN1PTS1358P+16q8736uVPdJZ0iq5vVMTtWgxYWSDjjMHnS/QxNcbGj4SqaQpMKEbn +yMgQbnJ8FUZgA6IqQGCjALYZ2Ts4tdM7H6K2SrU= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_INVALID,DKIM_SIGNED,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from akashast-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: akashast@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 2DE1A606AC; Wed, 13 Nov 2019 10:49:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1573642150; bh=bXxQtYvurhAVLIzAS+o22RaXGTA/pMMVi2RYqvEjxcw=; h=From:To:Cc:Subject:Date:From; b=a8mmcVgWkAvhDJ/KUdmK/4SSL5qL1qgblUolseJqTjwsZZtv/d2qhpe1RG8ijvcnO IV0Frjq7HEqQTP75/72ZkNQ8Q/7N5KeFVJ8HMe/jbxDvkXv3vqZqAtk06KC/PNGyQF EFMqH9dFhzQIgGTMcIl2EeyiobtdLWCoh2BxhY3E= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 2DE1A606AC Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=akashast@codeaurora.org From: Akash Asthana To: gregkh@linuxfoundation.org Cc: linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, mgautam@codeaurora.org, swboyd@chromium.org, msavaliy@codeaurora.org, Akash Asthana Subject: [PATCH v5 2/3] tty: serial: qcom_geni_serial: Wakeup over UART RX Date: Wed, 13 Nov 2019 16:18:56 +0530 Message-Id: <1573642136-30488-1-git-send-email-akashast@codeaurora.org> X-Mailer: git-send-email 2.7.4 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add system wakeup capability over UART RX line for wakeup capable UART. When system is suspended, RX line act as an interrupt to wakeup system for any communication requests from peer. Signed-off-by: Akash Asthana --- Changes in V5: - No change. Changes in V4: - As per Greg's comment, removed extra dev_err logging. - As per Stephen's comment, using common code that manage wakeirq irqs for devices. Using dev_pm_set_dedicated_wake_irq API that will take care of requesting and attaching wakeup irqs for devices. Also, it sets wakeirq status to WAKE_IRQ_DEDICATED_ALLOCATED as a result enabling/disabling of wake irq will be managed by suspend/resume framework so, removed the code for enabling and disabling of wake irq from the driver. Changes in V3: - As per Stephen's comment, using platform_get_irq_optional API to get wakeup IRQ for device. Changes in V2: - As per Stephen's comment, splitted V1 patch into 2 seperate patch. a) Clean up of core IRQ registration b) Add wakeup feature. drivers/tty/serial/qcom_geni_serial.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 634054a..56dad67 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -14,6 +14,8 @@ #include #include #include +#include +#include #include #include #include @@ -116,6 +118,7 @@ struct qcom_geni_serial_port { bool brk; unsigned int tx_remaining; + int wakeup_irq; }; static const struct uart_ops qcom_geni_console_pops; @@ -1302,6 +1305,9 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) return irq; uport->irq = irq; + if (!console) + port->wakeup_irq = platform_get_irq_optional(pdev, 1); + uport->private_data = drv; platform_set_drvdata(pdev, port); port->handle_rx = console ? handle_rx_console : handle_rx_uart; @@ -1321,6 +1327,23 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) return ret; } + if (port->wakeup_irq > 0) { + /* + * Set pm_runtime status as ACTIVE so that wakeup_irq gets + * enabled/disabled from dev_pm_arm_wake_irq during system + * suspend/resume respectively. + */ + pm_runtime_set_active(&pdev->dev); + device_init_wakeup(&pdev->dev, true); + ret = dev_pm_set_dedicated_wake_irq(&pdev->dev, + port->wakeup_irq); + if (ret) { + device_init_wakeup(&pdev->dev, false); + uart_remove_one_port(drv, uport); + return ret; + } + } + return ret; } @@ -1330,6 +1353,10 @@ static int qcom_geni_serial_remove(struct platform_device *pdev) struct uart_driver *drv = port->uport.private_data; uart_remove_one_port(drv, &port->uport); + + device_init_wakeup(&pdev->dev, false); + dev_pm_clear_wake_irq(&pdev->dev); + return 0; }