Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756724Ab2JEQNU (ORCPT ); Fri, 5 Oct 2012 12:13:20 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:42859 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756701Ab2JEQNP (ORCPT ); Fri, 5 Oct 2012 12:13:15 -0400 From: Sascha Hauer To: linux-serial@vger.kernel.org Cc: Alan Cox , Greg Kroah-Hartman , Grant Likely , Rob Herring , linux-kernel@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, , Sascha Hauer Subject: [PATCH 1/3] serial_core: Add helper for matching against linux,stdout-path Date: Fri, 5 Oct 2012 18:12:59 +0200 Message-Id: <1349453581-1685-2-git-send-email-s.hauer@pengutronix.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1349453581-1685-1-git-send-email-s.hauer@pengutronix.de> References: <1349453581-1685-1-git-send-email-s.hauer@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2421 Lines: 81 devicetrees may have a linux,stdout-path property in the chosen node describing the console device. This adds a helper function to match a device against this property so a driver can call add_preferred_console for a matching device. Signed-off-by: Sascha Hauer --- drivers/tty/serial/serial_core.c | 30 ++++++++++++++++++++++++++++++ include/linux/serial_core.h | 3 +++ 2 files changed, 33 insertions(+) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index a21dc8e..f4a9f26 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include @@ -2540,6 +2541,35 @@ void uart_insert_char(struct uart_port *port, unsigned int status, } EXPORT_SYMBOL_GPL(uart_insert_char); +#ifdef CONFIG_OF +/** + * of_uart_is_stdoutpath - check if this device matches the linux,stdout-path + * property + * + * Check if this device matches the linux,stdout-path property + * in the chosen node. return true if yes, false otherwise. + */ +int of_uart_is_stdoutpath(struct device *dev) +{ + struct device_node *dn; + const char *name; + + name = of_get_property(of_chosen, "linux,stdout-path", NULL); + if (name == NULL) + return 0; + + dn = of_find_node_by_path(name); + if (!dn) + return 0; + + if (dn == dev->of_node) + return 1; + + return 0; +} +EXPORT_SYMBOL_GPL(of_uart_is_stdoutpath); +#endif + EXPORT_SYMBOL(uart_write_wakeup); EXPORT_SYMBOL(uart_register_driver); EXPORT_SYMBOL(uart_unregister_driver); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 0253c20..35a61f6 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -560,6 +560,9 @@ static inline int uart_handle_break(struct uart_port *port) (cflag) & CRTSCTS || \ !((cflag) & CLOCAL)) +/* check if a device matches the linux,stdout-path property */ +int of_uart_is_stdoutpath(struct device *dev); + #endif #endif /* LINUX_SERIAL_CORE_H */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/