From patchwork Fri Aug 15 17:42:29 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 4728711 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 673A6C0338 for ; Fri, 15 Aug 2014 17:46:49 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4E92120117 for ; Fri, 15 Aug 2014 17:46:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A9088201F2 for ; Fri, 15 Aug 2014 17:46:46 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XILXF-0001X5-QR; Fri, 15 Aug 2014 17:43:29 +0000 Received: from galois.linutronix.de ([2001:470:1f0b:db:abcd:42:0:1]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XILX6-0001QL-5U for linux-arm-kernel@lists.infradead.org; Fri, 15 Aug 2014 17:43:21 +0000 Received: from localhost ([127.0.0.1] helo=bazinga.breakpoint.cc) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1XILWe-0006sE-9t; Fri, 15 Aug 2014 19:42:52 +0200 From: Sebastian Andrzej Siewior To: linux-serial@vger.kernel.org Subject: [PATCH 01/15] tty: serial: 8250_core: allow to overwrite & export serial8250_startup() Date: Fri, 15 Aug 2014 19:42:29 +0200 Message-Id: <1408124563-31541-2-git-send-email-bigeasy@linutronix.de> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1408124563-31541-1-git-send-email-bigeasy@linutronix.de> References: <1408124563-31541-1-git-send-email-bigeasy@linutronix.de> MIME-Version: 1.0 X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1, SHORTCIRCUIT=-0.0001 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140815_104320_378784_C78DB3B0 X-CRM114-Status: GOOD ( 13.16 ) X-Spam-Score: -0.7 (/) Cc: tony@atomide.com, Greg Kroah-Hartman , Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, balbi@ti.com, Vinod Koul , linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The OMAP version of the 8250 can actually use 1:1 serial8250_startup(). However it needs to be extended by a wake up irq which should to be requested & enabled at ->startup() time and disabled at ->shutdown() time. v2…v3: properly copy callbacks v1…v2: add shutdown callback Acked-by: Alan Cox Signed-off-by: Sebastian Andrzej Siewior --- drivers/tty/serial/8250/8250_core.c | 26 ++++++++++++++++++++++++-- include/linux/serial_8250.h | 2 ++ include/linux/serial_core.h | 2 ++ 3 files changed, 28 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index e2ad13a..dde1331 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1929,7 +1929,7 @@ static void serial8250_put_poll_char(struct uart_port *port, #endif /* CONFIG_CONSOLE_POLL */ -static int serial8250_startup(struct uart_port *port) +int serial8250_do_startup(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; @@ -2180,8 +2180,17 @@ static int serial8250_startup(struct uart_port *port) return 0; } +EXPORT_SYMBOL_GPL(serial8250_do_startup); -static void serial8250_shutdown(struct uart_port *port) +static int serial8250_startup(struct uart_port *port) +{ + if (port->startup) + return port->startup(port); + else + return serial8250_do_startup(port); +} + +void serial8250_do_shutdown(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; @@ -2231,6 +2240,15 @@ static void serial8250_shutdown(struct uart_port *port) if (port->irq) serial_unlink_irq_chain(up); } +EXPORT_SYMBOL_GPL(serial8250_do_shutdown); + +static void serial8250_shutdown(struct uart_port *port) +{ + if (port->shutdown) + port->shutdown(port); + else + serial8250_do_shutdown(port); +} static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int baud) { @@ -3428,6 +3446,10 @@ int serial8250_register_8250_port(struct uart_8250_port *up) /* Possibly override set_termios call */ if (up->port.set_termios) uart->port.set_termios = up->port.set_termios; + if (up->port.startup) + uart->port.startup = up->port.startup; + if (up->port.shutdown) + uart->port.shutdown = up->port.shutdown; if (up->port.pm) uart->port.pm = up->port.pm; if (up->port.handle_break) diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index f93649e..c3aa004 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -121,6 +121,8 @@ extern void serial8250_early_out(struct uart_port *port, int offset, int value); extern int setup_early_serial8250_console(char *cmdline); extern void serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old); +extern int serial8250_do_startup(struct uart_port *port); +extern void serial8250_do_shutdown(struct uart_port *port); extern void serial8250_do_pm(struct uart_port *port, unsigned int state, unsigned int oldstate); extern int fsl8250_handle_irq(struct uart_port *port); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index cf3a1e7..f3ea531 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -122,6 +122,8 @@ struct uart_port { void (*set_termios)(struct uart_port *, struct ktermios *new, struct ktermios *old); + int (*startup)(struct uart_port *port); + void (*shutdown)(struct uart_port *port); int (*handle_irq)(struct uart_port *); void (*pm)(struct uart_port *, unsigned int state, unsigned int old);