Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751780AbdFGUFJ (ORCPT ); Wed, 7 Jun 2017 16:05:09 -0400 Received: from outils.crapouillou.net ([89.234.176.41]:56284 "EHLO outils.crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751726AbdFGUFF (ORCPT ); Wed, 7 Jun 2017 16:05:05 -0400 From: Paul Cercueil To: Ralf Baechle , Michael Turquette , Stephen Boyd , Rob Herring Cc: Paul Burton , Maarten ter Huurne , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, linux-clk@vger.kernel.org, Paul Cercueil Subject: [PATCH 06/15] serial: 8250_ingenic: Parse earlycon options Date: Wed, 7 Jun 2017 22:04:30 +0200 Message-Id: <20170607200439.24450-7-paul@crapouillou.net> In-Reply-To: <20170607200439.24450-1-paul@crapouillou.net> References: <20170607200439.24450-1-paul@crapouillou.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1564 Lines: 56 In the devicetree, it is possible to specify the baudrate, parity, bits, flow of the early console, by passing a configuration string like this: aliases { serial0 = &uart0; }; chosen { stdout-path = "serial0:57600n8"; }; This, for instance, will configure the early console for a baudrate of 57600 bps, no parity, and 8 bits per baud. This patches implements parsing of this configuration string in the 8250_ingenic driver, which previously just ignored it. Signed-off-by: Paul Cercueil --- drivers/tty/serial/8250/8250_ingenic.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_ingenic.c b/drivers/tty/serial/8250/8250_ingenic.c index b31b2ca552d1..59f3e632df49 100644 --- a/drivers/tty/serial/8250/8250_ingenic.c +++ b/drivers/tty/serial/8250/8250_ingenic.c @@ -99,14 +99,24 @@ static int __init ingenic_early_console_setup(struct earlycon_device *dev, const char *opt) { struct uart_port *port = &dev->port; - unsigned int baud, divisor; + unsigned int divisor; + int baud = 115200; if (!dev->port.membase) return -ENODEV; + if (opt) { + char options[256]; + unsigned int parity, bits, flow; /* unused for now */ + + strlcpy(options, opt, sizeof(options)); + uart_parse_options(options, &baud, &parity, &bits, &flow); + } + ingenic_early_console_setup_clock(dev); - baud = dev->baud ?: 115200; + if (dev->baud) + baud = dev->baud; divisor = DIV_ROUND_CLOSEST(port->uartclk, 16 * baud); early_out(port, UART_IER, 0); -- 2.11.0