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=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, 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 AC741C43215 for ; Fri, 22 Nov 2019 14:18:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 822BF2071F for ; Fri, 22 Nov 2019 14:18:25 +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="mI7ttV16"; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b="IUbQLO1e" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726568AbfKVOSZ (ORCPT ); Fri, 22 Nov 2019 09:18:25 -0500 Received: from a27-10.smtp-out.us-west-2.amazonses.com ([54.240.27.10]:36514 "EHLO a27-10.smtp-out.us-west-2.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726100AbfKVOSY (ORCPT ); Fri, 22 Nov 2019 09:18:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=zsmsymrwgfyinv5wlfyidntwsjeeldzt; d=codeaurora.org; t=1574432304; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; bh=qJH+yx4Hn/VtzKH5j0VbwhaJKVdEHt0pS4CwQiE53d4=; b=mI7ttV16qTlS2OyQ5IEebaD2H5Ifl1zgg9yvFQjF+ClB98jRCjBBcIoc6ewu+Hd0 f2ak2EMQ/v8dstkUcIzFnTSOx8LJbAyvoDDyKVyhrGpb7oABFA0FwOaZajHTXpObL0S hkX93wNuws0JXARQaT3aEiJHbWEY2CNBUtEdEPsk= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=gdwg2y3kokkkj5a55z2ilkup5wp5hhxx; d=amazonses.com; t=1574432304; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References:Feedback-ID; bh=qJH+yx4Hn/VtzKH5j0VbwhaJKVdEHt0pS4CwQiE53d4=; b=IUbQLO1eI1f/Etq+4ALFYBTUJyRT9C60FosPZ8TUPVSlN+S73R5A9MIXlzEQO9ur BousNefHrtONZVCLYD2QUGC/DVmoFDQ0SwnG5FUCvfckgoTcBIMy5zKBlXmnKLY1QzK 8PfY6udnJMaF0wFUeL+/GR+8RpnO6KRW3PSUpLcE= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BA80AC76F54 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=akashast@codeaurora.org From: Akash Asthana To: gregkh@linuxfoundation.org Cc: swboyd@chromium.org, mgautam@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, Akash Asthana Subject: [PATCH v6 5/5] tty: serial: qcom_geni_serial: Move loopback support to TIOCM_LOOP Date: Fri, 22 Nov 2019 14:18:24 +0000 Message-ID: <0101016e937a6c00-b8cf45e5-aedf-4e03-bf23-47d7810a0b23-000000@us-west-2.amazonses.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1574432266-20732-1-git-send-email-akashast@codeaurora.org> References: <1574432266-20732-1-git-send-email-akashast@codeaurora.org> X-SES-Outgoing: 2019.11.22-54.240.27.10 Feedback-ID: 1.us-west-2.CZuq2qbDmUIuT3qdvXlRHZZCpfZqZ4GtG9v3VKgRyF0=:AmazonSES Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Remove code from the driver that create and maintain loopback sysfs node. Instead use the ioctl TIOCMSET with TIOCM_LOOP argument to set HW to loopback mode. Signed-off-by: Akash Asthana --- Change in V6: - As per stephen's comment corrected commit subject. - As per stephen's comment defined new macros for different loopback mode. drivers/tty/serial/qcom_geni_serial.c | 36 +++++++++-------------------------- 1 file changed, 9 insertions(+), 27 deletions(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index b952509..3e84192 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -93,7 +93,11 @@ #define DEF_TX_WM 2 #define DEF_FIFO_WIDTH_BITS 32 #define UART_RX_WM 2 -#define MAX_LOOPBACK_CFG 3 + +/* SE_UART_LOOPBACK_CFG */ +#define RX_TX_SORTED BIT(0) +#define CTS_RTS_SORTED BIT(1) +#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED) #ifdef CONFIG_CONSOLE_POLL #define CONSOLE_RX_BYTES_PW 1 @@ -165,30 +169,6 @@ static struct qcom_geni_serial_port qcom_geni_uart_ports[GENI_UART_PORTS] = { }, }; -static ssize_t loopback_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct qcom_geni_serial_port *port = dev_get_drvdata(dev); - - return snprintf(buf, sizeof(u32), "%d\n", port->loopback); -} - -static ssize_t loopback_store(struct device *dev, - struct device_attribute *attr, const char *buf, - size_t size) -{ - struct qcom_geni_serial_port *port = dev_get_drvdata(dev); - u32 loopback; - - if (kstrtoint(buf, 0, &loopback) || loopback > MAX_LOOPBACK_CFG) { - dev_err(dev, "Invalid input\n"); - return -EINVAL; - } - port->loopback = loopback; - return size; -} -static DEVICE_ATTR_RW(loopback); - static struct qcom_geni_serial_port qcom_geni_console_port = { .uport = { .iotype = UPIO_MEM, @@ -238,10 +218,14 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport, unsigned int mctrl) { u32 uart_manual_rfr = 0; + struct qcom_geni_serial_port *port = to_dev_port(uport, uport); if (uart_console(uport)) return; + if (mctrl & TIOCM_LOOP) + port->loopback = RX_TX_CTS_RTS_SORTED; + if (!(mctrl & TIOCM_RTS)) uart_manual_rfr = UART_MANUAL_RFR_EN | UART_RFR_NOT_READY; writel(uart_manual_rfr, uport->membase + SE_UART_MANUAL_RFR); @@ -1311,8 +1295,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) uport->private_data = drv; platform_set_drvdata(pdev, port); port->handle_rx = console ? handle_rx_console : handle_rx_uart; - if (!console) - device_create_file(uport->dev, &dev_attr_loopback); ret = uart_add_one_port(drv, uport); if (ret) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project