From: David Vrabel <dvrabel@arcom.com>
To: linux-serial mailing list <linux-serial@vger.kernel.org>
Subject: New 8250 device -- XR16550.
Date: Fri, 24 Sep 2004 09:59:03 +0100 [thread overview]
Message-ID: <4153E1D7.3010201@arcom.com> (raw)
Hi,
This adds support for the two 16550 compatible UARTs in an Exar
XR16L2551 chip to the 8250 driver. They have a sleep mode like the
ST16650V2s but a smaller (16 byte) Rx fifo.
Index: linux-2.6-armbe/drivers/serial/8250.c
===================================================================
--- linux-2.6-armbe.orig/drivers/serial/8250.c 2004-09-22
17:12:19.000000000 +0100
+++ linux-2.6-armbe/drivers/serial/8250.c 2004-09-23 17:53:37.000000000
+0100
@@ -174,6 +174,7 @@
{ "RSA", 2048, 2048, UART_CAP_FIFO },
{ "NS16550A", 16, 16, UART_CAP_FIFO | UART_NATSEMI },
{ "XScale", 32, 32, UART_CAP_FIFO },
+ { "XR16550", 16, 16, UART_CAP_FIFO | UART_CAP_SLEEP | UART_CAP_EFR },
};
static _INLINE_ unsigned int serial_in(struct uart_8250_port *up, int
offset)
@@ -477,8 +478,10 @@
*/
if (size_fifo(up) == 64)
up->port.type = PORT_16654;
- else
+ else if(size_fifo(up) == 32)
up->port.type = PORT_16650V2;
+ else
+ up->port.type = PORT_XR16550;
}
/*
Index: linux-2.6-armbe/include/linux/serial_core.h
===================================================================
--- linux-2.6-armbe.orig/include/linux/serial_core.h 2004-09-23
17:01:32.000000000 +0100
+++ linux-2.6-armbe/include/linux/serial_core.h 2004-09-23
17:03:10.000000000 +0100
@@ -37,7 +37,8 @@
#define PORT_RSA 13
#define PORT_NS16550A 14
#define PORT_XSCALE 15
-#define PORT_MAX_8250 15 /* max port ID */
+#define PORT_XR16550 16
+#define PORT_MAX_8250 16 /* max port ID */
/*
* ARM specific type numbers. These are not currently guaranteed
David Vrabel
--
David Vrabel, Design Engineer
Arcom, Clifton Road Tel: +44 (0)1223 411200 ext. 3233
Cambridge CB1 7EA, UK Web: http://www.arcom.com/
next reply other threads:[~2004-09-24 8:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-24 8:59 David Vrabel [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-09-24 8:32 New 8250 device -- XR16550 David Vrabel
2004-09-24 8:59 ` David Vrabel
2004-09-24 13:36 ` Russell King
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