avr32: add RTS/CTS/CLK pin selection for the USARTs

Adds extra parameter to AT32 at32_map_usart(), so as to reserve
RTS/CTS/CLK pins.

All boards under arch/avr32/boards have been updated (trivial change), but
not all have been tested.
Signed-off-by: Peter Ma <pma@mediamatech.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

arch/avr32/boards/atngw100/setup.c

@@ -118,7 +118,7 @@ static void __init set_hw_addr(struct platform_device *pdev)
 
 void __init setup_board(void)
 {
-	at32_map_usart(1, 0);	/* USART 1: /dev/ttyS0, DB9 */
+	at32_map_usart(1, 0, 0);	/* USART 1: /dev/ttyS0, DB9 */
 	at32_setup_serial_console(0);
 }
 

arch/avr32/boards/atstk1000/atstk1002.c

@@ -252,12 +252,12 @@ static void __init atstk1002_setup_extdac(void)
 void __init setup_board(void)
 {
 #ifdef	CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
-	at32_map_usart(0, 1);	/* USART 0/B: /dev/ttyS1, IRDA */
+	at32_map_usart(0, 1, 0);	/* USART 0/B: /dev/ttyS1, IRDA */
 #else
-	at32_map_usart(1, 0);	/* USART 1/A: /dev/ttyS0, DB9 */
+	at32_map_usart(1, 0, 0);	/* USART 1/A: /dev/ttyS0, DB9 */
 #endif
 	/* USART 2/unused: expansion connector */
-	at32_map_usart(3, 2);	/* USART 3/C: /dev/ttyS2, DB9 */
+	at32_map_usart(3, 2, 0);	/* USART 3/C: /dev/ttyS2, DB9 */
 
 	at32_setup_serial_console(0);
 }

arch/avr32/boards/atstk1000/atstk1003.c

@@ -115,12 +115,12 @@ static void __init atstk1003_setup_extdac(void)
 void __init setup_board(void)
 {
 #ifdef	CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
-	at32_map_usart(0, 1);	/* USART 0/B: /dev/ttyS1, IRDA */
+	at32_map_usart(0, 1, 0);	/* USART 0/B: /dev/ttyS1, IRDA */
 #else
-	at32_map_usart(1, 0);	/* USART 1/A: /dev/ttyS0, DB9 */
+	at32_map_usart(1, 0, 0);	/* USART 1/A: /dev/ttyS0, DB9 */
 #endif
 	/* USART 2/unused: expansion connector */
-	at32_map_usart(3, 2);	/* USART 3/C: /dev/ttyS2, DB9 */
+	at32_map_usart(3, 2, 0);	/* USART 3/C: /dev/ttyS2, DB9 */
 
 	at32_setup_serial_console(0);
 }

arch/avr32/boards/atstk1000/atstk1004.c

@@ -120,12 +120,12 @@ static void __init atstk1004_setup_extdac(void)
 void __init setup_board(void)
 {
 #ifdef	CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
-	at32_map_usart(0, 1);	/* USART 0/B: /dev/ttyS1, IRDA */
+	at32_map_usart(0, 1, 0);	/* USART 0/B: /dev/ttyS1, IRDA */
 #else
-	at32_map_usart(1, 0);	/* USART 1/A: /dev/ttyS0, DB9 */
+	at32_map_usart(1, 0, 0);	/* USART 1/A: /dev/ttyS0, DB9 */
 #endif
 	/* USART 2/unused: expansion connector */
-	at32_map_usart(3, 2);	/* USART 3/C: /dev/ttyS2, DB9 */
+	at32_map_usart(3, 2, 0);	/* USART 3/C: /dev/ttyS2, DB9 */
 
 	at32_setup_serial_console(0);
 }

arch/avr32/boards/favr-32/setup.c

@@ -250,7 +250,7 @@ static void __init favr32_setup_atmel_pwm_bl(void)
 
 void __init setup_board(void)
 {
-	at32_map_usart(3, 0);	/* USART 3 => /dev/ttyS0 */
+	at32_map_usart(3, 0, 0);	/* USART 3 => /dev/ttyS0 */
 	at32_setup_serial_console(0);
 }
 

arch/avr32/boards/hammerhead/setup.c

@@ -165,7 +165,7 @@ static void __init set_hw_addr(struct platform_device *pdev)
 
 void __init setup_board(void)
 {
-	at32_map_usart(1, 0);	/* USART 1: /dev/ttyS0, DB9 */
+	at32_map_usart(1, 0, 0);	/* USART 1: /dev/ttyS0, DB9 */
 	at32_setup_serial_console(0);
 }
 

arch/avr32/boards/merisc/setup.c

@@ -231,9 +231,9 @@ static void detect_merisc_board_id(void)
 
 void __init setup_board(void)
 {
-	at32_map_usart(0, 0);
-	at32_map_usart(1, 1);
-	at32_map_usart(3, 3);
+	at32_map_usart(0, 0, 0);
+	at32_map_usart(1, 1, 0);
+	at32_map_usart(3, 3, 0);
 	at32_setup_serial_console(1);
 }
 
@@ -248,7 +248,7 @@ static int __init merisc_init(void)
 	at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL | (1 << 26));
 
 	if (merisc_board_id >= 1)
-		at32_map_usart(2, 2);
+		at32_map_usart(2, 2, 0);
 
 	at32_add_device_usart(0);
 	at32_add_device_usart(1);

arch/avr32/boards/mimc200/setup.c

@@ -175,10 +175,10 @@ static void __init set_hw_addr(struct platform_device *pdev)
 
 void __init setup_board(void)
 {
-	at32_map_usart(0, 0);	/* USART 0: /dev/ttyS0 (TTL --> Altera) */
-	at32_map_usart(1, 1);	/* USART 1: /dev/ttyS1 (RS232) */
-	at32_map_usart(2, 2);	/* USART 2: /dev/ttyS2 (RS485) */
-	at32_map_usart(3, 3);	/* USART 3: /dev/ttyS3 (RS422 Multidrop) */
+	at32_map_usart(0, 0, 0);	/* USART 0: /dev/ttyS0 (TTL --> Altera) */
+	at32_map_usart(1, 1, 0);	/* USART 1: /dev/ttyS1 (RS232) */
+	at32_map_usart(2, 2, 0);	/* USART 2: /dev/ttyS2 (RS485) */
+	at32_map_usart(3, 3, 0);	/* USART 3: /dev/ttyS3 (RS422 Multidrop) */
 }
 
 static struct i2c_gpio_platform_data i2c_gpio_data = {

arch/avr32/mach-at32ap/at32ap700x.c

@@ -966,56 +966,68 @@ static struct resource atmel_usart3_resource[] = {
 DEFINE_DEV_DATA(atmel_usart, 3);
 DEV_CLK(usart, atmel_usart3, pba, 6);
 
-static inline void configure_usart0_pins(void)
+static inline void configure_usart0_pins(int flags)
 {
 	u32 pin_mask = (1 << 8) | (1 << 9); /* RXD & TXD */
+	if (flags & ATMEL_USART_RTS)	pin_mask |= (1 << 6);
+	if (flags & ATMEL_USART_CTS)	pin_mask |= (1 << 7);
+	if (flags & ATMEL_USART_CLK)	pin_mask |= (1 << 10);
 
 	select_peripheral(PIOA, pin_mask, PERIPH_B, AT32_GPIOF_PULLUP);
 }
 
-static inline void configure_usart1_pins(void)
+static inline void configure_usart1_pins(int flags)
 {
 	u32 pin_mask = (1 << 17) | (1 << 18); /* RXD & TXD */
+	if (flags & ATMEL_USART_RTS)	pin_mask |= (1 << 19);
+	if (flags & ATMEL_USART_CTS)	pin_mask |= (1 << 20);
+	if (flags & ATMEL_USART_CLK)	pin_mask |= (1 << 16);
 
 	select_peripheral(PIOA, pin_mask, PERIPH_A, AT32_GPIOF_PULLUP);
 }
 
-static inline void configure_usart2_pins(void)
+static inline void configure_usart2_pins(int flags)
 {
 	u32 pin_mask = (1 << 26) | (1 << 27); /* RXD & TXD */
+	if (flags & ATMEL_USART_RTS)	pin_mask |= (1 << 30);
+	if (flags & ATMEL_USART_CTS)	pin_mask |= (1 << 29);
+	if (flags & ATMEL_USART_CLK)	pin_mask |= (1 << 28);
 
 	select_peripheral(PIOB, pin_mask, PERIPH_B, AT32_GPIOF_PULLUP);
 }
 
-static inline void configure_usart3_pins(void)
+static inline void configure_usart3_pins(int flags)
 {
 	u32 pin_mask = (1 << 18) | (1 << 17); /* RXD & TXD */
+	if (flags & ATMEL_USART_RTS)	pin_mask |= (1 << 16);
+	if (flags & ATMEL_USART_CTS)	pin_mask |= (1 << 15);
+	if (flags & ATMEL_USART_CLK)	pin_mask |= (1 << 19);
 
 	select_peripheral(PIOB, pin_mask, PERIPH_B, AT32_GPIOF_PULLUP);
 }
 
 static struct platform_device *__initdata at32_usarts[4];
 
-void __init at32_map_usart(unsigned int hw_id, unsigned int line)
+void __init at32_map_usart(unsigned int hw_id, unsigned int line, int flags)
 {
 	struct platform_device *pdev;
 
 	switch (hw_id) {
 	case 0:
 		pdev = &atmel_usart0_device;
-		configure_usart0_pins();
+		configure_usart0_pins(flags);
 		break;
 	case 1:
 		pdev = &atmel_usart1_device;
-		configure_usart1_pins();
+		configure_usart1_pins(flags);
 		break;
 	case 2:
 		pdev = &atmel_usart2_device;
-		configure_usart2_pins();
+		configure_usart2_pins(flags);
 		break;
 	case 3:
 		pdev = &atmel_usart3_device;
-		configure_usart3_pins();
+		configure_usart3_pins(flags);
 		break;
 	default:
 		return;

arch/avr32/mach-at32ap/include/mach/board.h

@@ -26,12 +26,17 @@ static inline void __deprecated at32_add_system_devices(void)
 #define ATMEL_MAX_UART	4
 extern struct platform_device *atmel_default_console_device;
 
+/* Flags for selecting USART extra pins */
+#define	ATMEL_USART_RTS		0x01
+#define	ATMEL_USART_CTS		0x02
+#define	ATMEL_USART_CLK		0x03
+
 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 */
 };
-void at32_map_usart(unsigned int hw_id, unsigned int line);
+void at32_map_usart(unsigned int hw_id, unsigned int line, int flags);
 struct platform_device *at32_add_device_usart(unsigned int id);
 
 struct eth_platform_data {