arm: zynq: Add support for EMIT_WRITE operation

Add proper support for EMIT_WRITE operation which is write only.
Do not use EMIT_MASKWRITE which is read-modify-write.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/mach-zynq/include/mach/ps7_init_gpl.h

@@ -13,6 +13,7 @@
 #define OPCODE_MASKWRITE	0U
 #define OPCODE_MASKPOLL		1U
 #define OPCODE_MASKDELAY	2U
+#define OPCODE_WRITE		3U
 #define OPCODE_ADDRESS_MASK	(~3U)
 
 /* Sentinel */
@@ -21,6 +22,7 @@
 #define EMIT_MASKWRITE(addr, mask, val)	OPCODE_MASKWRITE | addr, mask, val
 #define EMIT_MASKPOLL(addr, mask)	OPCODE_MASKPOLL | addr, mask
 #define EMIT_MASKDELAY(addr, mask)	OPCODE_MASKDELAY | addr, mask
+#define EMIT_WRITE(addr, val)		OPCODE_WRITE | addr, val
 
 /* Returns codes of ps7_init* */
 #define PS7_INIT_SUCCESS		(0)

arch/arm/mach-zynq/ps7_spl_init.c

@@ -108,6 +108,12 @@ int __weak ps7_config(unsigned long *ps7_config_init)
 			iowrite((ioread(addr) & ~mask) | (val & mask), addr);
 			break;
 
+		case OPCODE_WRITE:
+			numargs = 2;
+			val = ptr[1];
+			iowrite(val, addr);
+			break;
+
 		case OPCODE_MASKPOLL:
 			numargs = 2;
 			mask = ptr[1];