From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDB7FC433E0 for ; Fri, 24 Jul 2020 03:58:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3B8020714 for ; Fri, 24 Jul 2020 03:58:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726573AbgGXD6q (ORCPT ); Thu, 23 Jul 2020 23:58:46 -0400 Received: from alexa-out.qualcomm.com ([129.46.98.28]:38295 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726503AbgGXD6q (ORCPT ); Thu, 23 Jul 2020 23:58:46 -0400 Received: from ironmsg07-lv.qualcomm.com (HELO ironmsg07-lv.qulacomm.com) ([10.47.202.151]) by alexa-out.qualcomm.com with ESMTP; 23 Jul 2020 20:58:46 -0700 Received: from ironmsg02-blr.qualcomm.com ([10.86.208.131]) by ironmsg07-lv.qulacomm.com with ESMTP/TLS/AES256-SHA; 23 Jul 2020 20:58:44 -0700 Received: from c-skakit-linux.ap.qualcomm.com (HELO c-skakit-linux.qualcomm.com) ([10.242.51.242]) by ironmsg02-blr.qualcomm.com with ESMTP; 24 Jul 2020 09:28:24 +0530 Received: by c-skakit-linux.qualcomm.com (Postfix, from userid 2344709) id 2CF344272; Fri, 24 Jul 2020 09:28:23 +0530 (IST) From: satya priya To: Bjorn Andersson , gregkh@linuxfoundation.org Cc: Andy Gross , Rob Herring , Matthias Kaehlcke , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, akashast@codeaurora.org, rojay@codeaurora.org, msavaliy@qti.qualcomm.com, satya priya Subject: [PATCH V2 3/3] tty: serial: qcom_geni_serial: Fix the UART wakeup issue Date: Fri, 24 Jul 2020 09:28:02 +0530 Message-Id: <1595563082-2353-4-git-send-email-skakit@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1595563082-2353-1-git-send-email-skakit@codeaurora.org> References: <1595563082-2353-1-git-send-email-skakit@codeaurora.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org As a part of system suspend we call uart_port_suspend from the Serial driver, which calls set_mctrl passing mctrl as NULL. This makes RFR high(NOT_READY) during suspend. Due to this BT SoC is not able to send wakeup bytes to UART during suspend. Included if check for non-suspend case to keep RFR low during suspend. Signed-off-by: satya priya --- Changes in V2: - This patch fixes the UART flow control issue during suspend. Newly added in V2. drivers/tty/serial/qcom_geni_serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 07b7b6b..7108dfc 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -242,7 +242,7 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport, if (mctrl & TIOCM_LOOP) port->loopback = RX_TX_CTS_RTS_SORTED; - if (!(mctrl & TIOCM_RTS)) + if ((!(mctrl & TIOCM_RTS)) && (!(uport->suspended))) uart_manual_rfr = UART_MANUAL_RFR_EN | UART_RFR_NOT_READY; writel(uart_manual_rfr, uport->membase + SE_UART_MANUAL_RFR); } -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation