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>

2 files changed, 27 insertions, 10 deletions

diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 62501d64322c..7cc653798327 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/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;
diff --git a/arch/avr32/mach-at32ap/include/mach/board.h b/arch/avr32/mach-at32ap/include/mach/board.h
index b363b067b0a4..0b8164281899 100644
--- a/arch/avr32/mach-at32ap/include/mach/board.h
+++ b/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 {