1 files changed, 65 insertions, 0 deletions
diff --git a/arch/mips/mti-malta/malta-platform.c b/arch/mips/mti-malta/malta-platform.c
new file mode 100644
index 000000000000..83b9bab3cd3f
--- /dev/null
+++ b/arch/mips/mti-malta/malta-platform.c
@@ -0,0 +1,65 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 MIPS Technologies, Inc.
+ *   written by Ralf Baechle (ralf@linux-mips.org)
+ *
+ * Probe driver for the Malta's UART ports:
+ *
+ *   o 2 ports in the SMC SuperIO
+ *   o 1 port in the CBUS UART, a discrete 16550 which normally is only used
+ *     for bringups.
+ *
+ * We don't use 8250_platform.c on Malta as it would result in the CBUS
+ * UART becoming ttyS0.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/serial_8250.h>
+
+#define SMC_PORT(base, int)						\
+{									\
+	.iobase		= base,						\
+	.irq		= int,						\
+	.uartclk	= 1843200,					\
+	.iotype		= UPIO_PORT,					\
+	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,		\
+	.regshift	= 0,						\
+}
+
+#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
+
+static struct plat_serial8250_port uart8250_data[] = {
+	SMC_PORT(0x3F8, 4),
+	SMC_PORT(0x2F8, 3),
+	{
+		.mapbase	= 0x1f000900,	/* The CBUS UART */
+		.irq		= MIPS_CPU_IRQ_BASE + 2,
+		.uartclk	= 3686400,	/* Twice the usual clk! */
+		.iotype		= UPIO_MEM32,
+		.flags		= CBUS_UART_FLAGS,
+		.regshift	= 3,
+	},
+	{ },
+};
+
+static struct platform_device uart8250_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM2,
+	.dev			= {
+		.platform_data	= uart8250_data,
+	},
+};
+
+static int __init uart8250_init(void)
+{
+	return platform_device_register(&uart8250_device);
+}
+
+module_init(uart8250_init);
+
+MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("8250 UART probe driver for the Malta CBUS UART");