CVS: blob/src/blob h3600.c,1.1,1.2

[Erik M. <er...@us...>]

Update of /cvsroot/blob/blob/src/blob
In directory usw-pr-cvs1:/tmp/cvs-serv29407

Modified Files:
	h3600.c 
Log Message:
Remember the EGPIO register cause it is write-only


Index: h3600.c
===================================================================
RCS file: /cvsroot/blob/blob/src/blob/h3600.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- h3600.c	2001/10/27 21:04:20	1.1
+++ h3600.c	2001/10/28 20:27:38	1.2
@@ -34,7 +34,7 @@
 
 
 /* flash descriptor for H3600 flash */
-/* 2x Intel ??? (16MB) */
+/* 2x 28F640J3A (16MB) */
 static flash_descriptor_t h3600_flash_descriptors[] =
 {
 	{
@@ -61,8 +61,14 @@
 
 
 /* H3600 EGPIO register */
-static u32 *egpio = (u32 *)0x49000000;
+static u32 *EGPIO = (u32 *)0x49000000;
 
+/* the EGPIO register is write only, so we need a shadow register to
+ * remember the state
+ */
+static u32 shadow_egpio; 
+
+
 /* taken from Linux include/asm-arm/arch-sa1100/h3600.h */
 #define EGPIO_H3600_VPP_ON		(1 << 0)
 #define EGPIO_H3600_RS232_ON		(1 << 7)  /* UART3 transceiver force on.  Active high. */
@@ -71,7 +77,8 @@
 static void h3600_init_egpio(void)
 {
 	/* enable RS232 tranceiver */
-	*egpio = EGPIO_H3600_RS232_ON;
+	shadow_egpio = EGPIO_H3600_RS232_ON;
+	*EGPIO = shadow_egpio;
 }