From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754803Ab2K1Mrb (ORCPT ); Wed, 28 Nov 2012 07:47:31 -0500 Received: from mga01.intel.com ([192.55.52.88]:47427 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754735Ab2K1Mra (ORCPT ); Wed, 28 Nov 2012 07:47:30 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,177,1355126400"; d="scan'208";a="255861987" From: Heikki Krogerus To: Greg Kroah-Hartman Cc: Alan Cox , Jamie Iles , linux-serial@vger.kernel.org, LKML Subject: [PATCH 1/5] serial: 8250: Allow drivers to deliver capabilities Date: Wed, 28 Nov 2012 14:48:40 +0200 Message-Id: <1354106924-11013-2-git-send-email-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1354106924-11013-1-git-send-email-heikki.krogerus@linux.intel.com> References: <1354106924-11013-1-git-send-email-heikki.krogerus@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Modern UARTs are able to provide information about their capabilities such as FIFO size. This allows the drivers to deliver this information to 8250.c when they are registering ports. Signed-off-by: Heikki Krogerus --- drivers/tty/serial/8250/8250.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 3ba4234..7dd131e 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -1906,9 +1906,12 @@ static int serial8250_startup(struct uart_port *port) if (port->type == PORT_8250_CIR) return -ENODEV; - port->fifosize = uart_config[up->port.type].fifo_size; - up->tx_loadsz = uart_config[up->port.type].tx_loadsz; - up->capabilities = uart_config[up->port.type].flags; + if (!port->fifosize) + port->fifosize = uart_config[port->type].fifo_size; + if (!up->tx_loadsz) + up->tx_loadsz = uart_config[port->type].tx_loadsz; + if (!up->capabilities) + up->capabilities = uart_config[port->type].flags; up->mcr = 0; if (port->iotype != up->cur_iotype) @@ -2739,9 +2742,12 @@ static void serial8250_init_fixed_type_port(struct uart_8250_port *up, unsigned int type) { up->port.type = type; - up->port.fifosize = uart_config[type].fifo_size; - up->capabilities = uart_config[type].flags; - up->tx_loadsz = uart_config[type].tx_loadsz; + if (!up->port.fifosize) + up->port.fifosize = uart_config[type].fifo_size; + if (!up->tx_loadsz) + up->tx_loadsz = uart_config[type].tx_loadsz; + if (!up->capabilities) + up->capabilities = uart_config[type].flags; } static void __init @@ -3175,6 +3181,10 @@ int serial8250_register_8250_port(struct uart_8250_port *up) uart->bugs = up->bugs; uart->port.mapbase = up->port.mapbase; uart->port.private_data = up->port.private_data; + uart->port.fifosize = up->port.fifosize; + uart->tx_loadsz = up->tx_loadsz; + uart->capabilities = up->capabilities; + if (up->port.dev) uart->port.dev = up->port.dev; -- 1.7.10.4