[PATCH 4/9] omap_uart: add low level port serial initialization

[Vicente Bergas]

 some sort of UART setup has to be done in order to use PUTC_LL

Signed-off-by: Vicente Bergas <vicencb at gmail.com>
---
 arch/arm/mach-omap/include/mach/debug_ll.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm/mach-omap/include/mach/debug_ll.h b/arch/arm/mach-omap/include/mach/debug_ll.h
index eea6eb3..9740848 100644
--- a/arch/arm/mach-omap/include/mach/debug_ll.h
+++ b/arch/arm/mach-omap/include/mach/debug_ll.h
@@ -45,9 +45,30 @@
 #endif
 
 #define LSR_THRE	0x20	/* Xmit holding register empty */
+#define LCR_BKSE	0x80	/* Bank select enable */
 #define LSR		(5 << 2)
 #define THR		(0 << 2)
+#define DLL		(0 << 2)
+#define IER		(1 << 2)
+#define DLM		(1 << 2)
+#define FCR		(2 << 2)
+#define LCR		(3 << 2)
+#define MCR		(4 << 2)
+#define MDR		(8 << 2)
 
+static inline void INIT_LL(void)
+{
+	writeb(0x00, UART_BASE + LCR);
+	writeb(0x00, UART_BASE + IER);
+	writeb(0x07, UART_BASE + MDR);
+	writeb(LCR_BKSE, UART_BASE + LCR);
+	writeb(26, UART_BASE + DLL); /* 115200 */
+	writeb(0, UART_BASE + DLM);
+	writeb(0x03, UART_BASE + LCR);
+	writeb(0x03, UART_BASE + MCR);
+	writeb(0x07, UART_BASE + FCR);
+	writeb(0x00, UART_BASE + MDR);
+}
 static inline void PUTC_LL(char c)
 {
 	/* Wait until there is space in the FIFO */
-- 
1.8.1.5