From patchwork Sat Oct 6 12:41:02 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 1557611 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id A33563FD56 for ; Sat, 6 Oct 2012 12:57:55 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TKTua-0005vA-NV; Sat, 06 Oct 2012 12:55:22 +0000 Received: from [2002:4e20:1eda::1] (helo=caramon.arm.linux.org.uk) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TKTgq-0002OF-Uy for linux-arm-kernel@lists.infradead.org; Sat, 06 Oct 2012 12:41:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=caramon; h=Date:Sender:Message-Id:Subject:Cc:To:From:References:In-Reply-To; bh=W6Dr/NKSXt0XXAZ7TnuHtaTRAgGEObVHts/0bqUdG3w=; b=Dy9Ch57D8v8JUxmIiinFk5KuiTL1NDzKl/hNFWWmPtjowdjafO6QlcMhWQuFsrUrjMTPafbPcFnc3vZPIQ1iNYoeTbndxa3GBhWKuM2rE1TO7XJuCgQOVxnLHr2i5eFdbVpEkpyawvSxIYaqU7JC5piek4RwARM99EXm9s5pDpk=; Received: from e0022681537dd.dyn.arm.linux.org.uk ([2002:4e20:1eda:1:222:68ff:fe15:37dd]:39595 helo=rmk-PC.arm.linux.org.uk) by caramon.arm.linux.org.uk with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.76) (envelope-from ) id 1TKTgl-000878-GF; Sat, 06 Oct 2012 13:41:03 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.76) (envelope-from ) id 1TKTgk-0002mj-L2; Sat, 06 Oct 2012 13:41:03 +0100 In-Reply-To: <20121006123803.GD15246@n2100.arm.linux.org.uk> References: <20121006123803.GD15246@n2100.arm.linux.org.uk> From: Russell King To: Tony Lindgren , Alan Cox , Greg Kroah-Hartman Subject: [RFC 06/24] SERIAL: omap: allow hardware assisted rts/cts modes to be disabled Message-Id: Date: Sat, 06 Oct 2012 13:41:02 +0100 X-Bad-Reply: References and In-Reply-To but no 'Re:' in Subject. X-Spam-Note: CRM114 invocation failed X-Spam-Score: -1.2 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.8 RDNS_NONE Delivered to internal network by a host with no rDNS X-Mailman-Approved-At: Sat, 06 Oct 2012 08:53:03 -0400 Cc: linux-omap@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org There is nothing which clears the auto RTS/CTS bits, so once hardware flow control gets enabled, there's no possibility to disable it. So, clear these bits when CRTSCTS is cleared. Signed-off-by: Russell King --- drivers/tty/serial/omap-serial.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 654dd78..f2535fe 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -917,6 +917,13 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, cval); + } else { + /* Disable AUTORTS and AUTOCTS */ + up->efr &= ~(UART_EFR_CTS | UART_EFR_RTS); + + serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); + serial_out(up, UART_EFR, up->efr); + serial_out(up, UART_LCR, cval); } serial_omap_set_mctrl(&up->port, up->port.mctrl);