[ARM] 3592/1: AT91RM9200 Serial driver update

Patch from Andrew Victor

This patch includes a number of updates to the AT91RM9200 serial driver.

Changes include:
1. Conversion to a platform_driver.  [Ivan Kokshaysky]
2. Replaced all references to AT91RM9200 with AT91.  This driver can now
also be used for the AT91SAM9216.
3. Allow TIOCM_LOOP to configure local loopback mode.
4. Cleaned up the 'read_status_mask' usage and interrupt handler code.
[Chip Coldwell]
5. Suspend/resume support.  [David Brownell]

There are a few 'unused variable' warning when compiling this - I
removed the new DMA support to keep this first patch simpler.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 34 insertions, 0 deletions

diff --git a/include/asm-arm/mach/serial_at91.h b/include/asm-arm/mach/serial_at91.h
new file mode 100644
index 000000000000..18bc4e00e475
--- /dev/null
+++ b/include/asm-arm/mach/serial_at91.h
@@ -0,0 +1,34 @@
+/*
+ *  linux/include/asm-arm/mach/serial_at91.h
+ *
+ *  Based on serial_sa1100.h  by Nicolas Pitre
+ *
+ *  Copyright (C) 2002 ATMEL Rousset
+ *
+ *  Low level machine dependent UART functions.
+ */
+#include <linux/config.h>
+
+struct uart_port;
+
+/*
+ * This is a temporary structure for registering these
+ * functions; it is intended to be discarded after boot.
+ */
+struct at91_port_fns {
+        void    (*set_mctrl)(struct uart_port *, u_int);
+        u_int   (*get_mctrl)(struct uart_port *);
+        void    (*enable_ms)(struct uart_port *);
+        void    (*pm)(struct uart_port *, u_int, u_int);
+        int     (*set_wake)(struct uart_port *, u_int);
+        int     (*open)(struct uart_port *);
+        void    (*close)(struct uart_port *);
+};
+
+#if defined(CONFIG_SERIAL_AT91)
+void at91_register_uart_fns(struct at91_port_fns *fns);
+#else
+#define at91_register_uart_fns(fns) do { } while (0)
+#endif
+
+