Message ID | 20171013090200.31034-9-miquel.raynal@free-electrons.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Received: from mail.free-electrons.com ([62.4.15.54]) by casper.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1e2vrn-0001ZZ-CM for linux-arm-kernel@lists.infradead.org; Fri, 13 Oct 2017 09:02:54 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 9F74E20838; Fri, 13 Oct 2017 11:02:11 +0200 (CEST) Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 30325207E1; Fri, 13 Oct 2017 11:02:11 +0200 (CEST) From: Miquel Raynal <miquel.raynal@free-electrons.com> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Linus Walleij <linus.walleij@linaro.org>, Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>, Gregory Clement <gregory.clement@free-electrons.com>, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, Jiri Slaby <jslaby@suse.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com> Subject: [PATCH v2 08/16] serial: mvebu-uart: clear state register before IRQ request Date: Fri, 13 Oct 2017 11:01:52 +0200 Message-Id: <20171013090200.31034-9-miquel.raynal@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171013090200.31034-1-miquel.raynal@free-electrons.com> References: <20171013090200.31034-1-miquel.raynal@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171013_100251_449127_B3FE89FD X-CRM114-Status: GOOD ( 13.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: <linux-arm-kernel.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/> List-Post: <mailto:linux-arm-kernel@lists.infradead.org> List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>, devicetree@vger.kernel.org, Allen Yan <yanwei@marvell.com>, Antoine Tenart <antoine.tenart@free-electrons.com>, Nadav Haklai <nadavh@marvell.com>, linux-gpio@vger.kernel.org, linux-serial@vger.kernel.org, Miquel Raynal <miquel.raynal@free-electrons.com>, Wilson Ding <dingwei@marvell.com>, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; 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diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c index 5767196ec0a9..6bd0c40008bb 100644 --- a/drivers/tty/serial/mvebu-uart.c +++ b/drivers/tty/serial/mvebu-uart.c @@ -322,6 +322,12 @@ static int mvebu_uart_startup(struct uart_port *port) writel(CTRL_TXFIFO_RST | CTRL_RXFIFO_RST, port->membase + UART_CTRL(port)); udelay(1); + + /* Clear the error bits of state register before IRQ request */ + ret = readl(port->membase + UART_STAT); + ret |= STAT_BRK_ERR; + writel(ret, port->membase + UART_STAT); + writel(CTRL_BRK_INT, port->membase + UART_CTRL(port)); ctl = readl(port->membase + UART_INTR(port));