From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752643AbcALTmb (ORCPT ); Tue, 12 Jan 2016 14:42:31 -0500 Received: from mail-pf0-f182.google.com ([209.85.192.182]:32928 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752510AbcALTmK (ORCPT ); Tue, 12 Jan 2016 14:42:10 -0500 From: Peter Hurley To: Greg Kroah-Hartman , Masahiro Yamada Cc: Rob Herring , Grant Likely , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Kevin Cernekee , Jon Hunter , Sebastian Frias , Paul Burton , Peter Hurley Subject: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Date: Tue, 12 Jan 2016 11:41:12 -0800 Message-Id: <1452627672-9482-12-git-send-email-peter@hurleysoftware.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1452627672-9482-1-git-send-email-peter@hurleysoftware.com> References: <1428515119-25248-1-git-send-email-peter@hurleysoftware.com> <1452627672-9482-1-git-send-email-peter@hurleysoftware.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add DT earlycon for 8250_omap driver. This boot console is included for kernels built with CONFIG_SERIAL_EARLYCON=y, CONFIG_OF=y, CONFIG_SERIAL_8250_OMAP=y, and CONFIG_OF_EARLY_FLATTREE=y. This boot console is enabled with the command line option "earlycon" (without "=...") when the DT 'stdout-path' property matches a compatible uart. For example, / { chosen { stdout-path = "serial0:115200"; }; .... aliases { serial0 = &uart0; }; .... ocp : ocp { uart0 : serial@44e09000 { compatible = "ti,omap3-uart"; } }; }; Signed-off-by: Peter Hurley --- drivers/tty/serial/8250/8250_early.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c index e7cdc0c..d1f6310 100644 --- a/drivers/tty/serial/8250/8250_early.c +++ b/drivers/tty/serial/8250/8250_early.c @@ -201,3 +201,23 @@ EARLYCON_DECLARE(rt288x, early_rt288x_setup); OF_EARLYCON_DECLARE(rt288x, "ralink,rt2880-uart", early_rt288x_setup); #endif /* CONFIG_SERIAL_8250_RT288X */ + +#ifdef CONFIG_SERIAL_8250_OMAP + +static int __init early_omap8250_setup(struct earlycon_device *device, + const char *options) +{ + struct uart_port *port = &device->port; + + if (!(device->port.membase || device->port.iobase)) + return -ENODEV; + + port->regshift = 2; + device->con->write = early_serial8250_write; + return 0; +} + +OF_EARLYCON_DECLARE(omap8250, "ti,omap2-uart", early_omap8250_setup); +OF_EARLYCON_DECLARE(omap8250, "ti,omap3-uart", early_omap8250_setup); +OF_EARLYCON_DECLARE(omap8250, "ti,omap4-uart", early_omap8250_setup); +#endif -- 2.7.0