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");