powerpc/t208xqds: VID support
The fuse status register provides the values from on-chip
voltage ID efuses programmed at the factory.
These values define the voltage requirements for
the chip. u-boot reads FUSESR and translates the values
into the appropriate commands to set the voltage output
value of an external voltage regulator.
Signed-off-by: Ying Zhang <b40530@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/common/vid.h b/board/freescale/common/vid.h
new file mode 100644
index 0000000..a9c7bb4
--- /dev/null
+++ b/board/freescale/common/vid.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __VID_H_
+#define __VID_H_
+
+#define IR36021_LOOP1_MANUAL_ID_OFFSET 0x6A
+#define IR36021_LOOP1_VOUT_OFFSET 0x9A
+#define IR36021_MFR_ID_OFFSET 0x92
+#define IR36021_MFR_ID 0x43
+
+/* step the IR regulator in 5mV increments */
+#define IR_VDD_STEP_DOWN 5
+#define IR_VDD_STEP_UP 5
+int adjust_vdd(ulong vdd_override);
+
+#endif /* __VID_H_ */