From patchwork Fri Jun 24 14:59:16 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 9197741 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CDB6860871 for ; Fri, 24 Jun 2016 14:59:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BED35283E5 for ; Fri, 24 Jun 2016 14:59:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B3BCD28493; Fri, 24 Jun 2016 14:59:29 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 55547284BB for ; Fri, 24 Jun 2016 14:59:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751054AbcFXO72 (ORCPT ); Fri, 24 Jun 2016 10:59:28 -0400 Received: from albert.telenet-ops.be ([195.130.137.90]:50656 "EHLO albert.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751109AbcFXO7W (ORCPT ); Fri, 24 Jun 2016 10:59:22 -0400 Received: from ayla.of.borg ([84.195.107.21]) by albert.telenet-ops.be with bizsmtp id AezJ1t00E0TjorY06ezJDU; Fri, 24 Jun 2016 16:59:19 +0200 Received: from ramsan.of.borg ([192.168.97.29] helo=ramsan) by ayla.of.borg with esmtp (Exim 4.82) (envelope-from ) id 1bGSZi-0003W1-7f; Fri, 24 Jun 2016 16:59:18 +0200 Received: from geert by ramsan with local (Exim 4.82) (envelope-from ) id 1bGSZj-0003IZ-3i; Fri, 24 Jun 2016 16:59:19 +0200 From: Geert Uytterhoeven To: Greg Kroah-Hartman , Jiri Slaby Cc: Magnus Damm , Yoshihiro Shimoda , linux-serial@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, Geert Uytterhoeven Subject: [PATCH v2 4/4] serial: sh-sci: Clear (H)SCIF timeout and overrun during reset Date: Fri, 24 Jun 2016 16:59:16 +0200 Message-Id: <1466780356-12623-5-git-send-email-geert+renesas@glider.be> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1466780356-12623-1-git-send-email-geert+renesas@glider.be> References: <1466780356-12623-1-git-send-email-geert+renesas@glider.be> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add the missing timeout bit definition for (H)SCIF. Clear the timeout and overrun flag bits during UART reset, cfr. the initialization flowchart in the datasheet. Signed-off-by: Geert Uytterhoeven --- v2: - No changes. --- drivers/tty/serial/sh-sci.c | 5 +++++ drivers/tty/serial/sh-sci.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 0a2be5d293220e08..cf2a7903d2f0270b 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2059,6 +2059,11 @@ static void sci_reset(struct uart_port *port) sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port) & SCxSR_ERROR_CLEAR(port) & SCxSR_BREAK_CLEAR(port)); + if (sci_getreg(port, SCLSR)->size) { + status = serial_port_in(port, SCLSR); + status &= ~(SCLSR_TO | SCLSR_ORER); + serial_port_out(port, SCLSR, status); + } } static void sci_set_termios(struct uart_port *port, struct ktermios *termios, diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h index 7a4fa185b93ef307..c590418d2a40d78b 100644 --- a/drivers/tty/serial/sh-sci.h +++ b/drivers/tty/serial/sh-sci.h @@ -105,6 +105,7 @@ enum { #define SCFCR_LOOP BIT(0) /* Loopback Test */ /* SCLSR (Line Status Register) on (H)SCIF */ +#define SCLSR_TO BIT(2) /* Timeout */ #define SCLSR_ORER BIT(0) /* Overrun Error */ /* SCSPTR (Serial Port Register), optional */