[ARM] 4754/1: [AT91] SSC library support

Core support of the Atmel SSC library for all Atmel AT91 processors.

Based on David Brownell's initial patch for the AT91RM9200.

Signed-off-by: Andrew Victor <linux@maxim.org.za>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/asm-arm/arch-at91/board.h b/include/asm-arm/arch-at91/board.h
index 762148cc48c1..7fefe018833c 100644
--- a/include/asm-arm/arch-at91/board.h
+++ b/include/asm-arm/arch-at91/board.h
@@ -116,6 +116,23 @@ struct atmel_uart_data {
 };
 extern void __init at91_add_device_serial(void);
 
+/*
+ * SSC -- accessed through ssc_request(id).  Drivers don't bind to SSC
+ * platform devices.  Their SSC ID is part of their configuration data,
+ * along with information about which SSC signals they should use.
+ */
+#define ATMEL_SSC_TK    0x01
+#define ATMEL_SSC_TF    0x02
+#define ATMEL_SSC_TD    0x04
+#define ATMEL_SSC_TX    (ATMEL_SSC_TK | ATMEL_SSC_TF | ATMEL_SSC_TD)
+
+#define ATMEL_SSC_RK    0x10
+#define ATMEL_SSC_RF    0x20
+#define ATMEL_SSC_RD    0x40
+#define ATMEL_SSC_RX    (ATMEL_SSC_RK | ATMEL_SSC_RF | ATMEL_SSC_RD)
+
+extern void __init at91_add_device_ssc(unsigned id, unsigned pins);
+
  /* LCD Controller */
 struct atmel_lcdfb_info;
 extern void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data);