ARM: 6092/1: atmel_serial: support for RS485 communications

Final version of the patch that adds support for RS485 communications to the atmel_serial driver.

The patch has been already sent and discussed on both linux-kernel and linux-arm-kernel mailing lists several times.

Many people collaborated to improve and test the code:

Tested-by: Sebastian Heutling <Sebastian.Heutling@who-ing.de>
Tested-by: Bernhard Roth <br@pwrnet.de>
Reviewed-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Signed-off-by: Michael Trimarchi <michael@evidence.eu.com>
Signed-off-by: Rick Bronson <rick@efn.org>
Signed-off-by: Sebastian Heutling <Sebastian.Heutling@who-ing.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index ceaec6c16eb2..df2ed848c9f8 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -39,6 +39,7 @@
 #include <linux/usb/atmel_usba_udc.h>
 #include <linux/atmel-mci.h>
 #include <sound/atmel-ac97c.h>
+#include <linux/serial.h>
 
  /* USB Device */
 struct at91_udc_data {
@@ -143,9 +144,10 @@ extern struct platform_device *atmel_default_console_device;
 extern void __init __deprecated at91_init_serial(struct at91_uart_config *config);
 
 struct atmel_uart_data {
-        short           use_dma_tx;     /* use transmit DMA? */
-        short           use_dma_rx;     /* use receive DMA? */
-        void __iomem    *regs;          /* virtual base address, if any */
+        short                   use_dma_tx;     /* use transmit DMA? */
+        short                   use_dma_rx;     /* use receive DMA? */
+        void __iomem            *regs;          /* virt. base address, if any */
+        struct serial_rs485     rs485;          /* rs485 settings */
 };
 extern void __init at91_add_device_serial(void);