board/t208xrdb: 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/t208xrdb/t208xrdb.c b/board/freescale/t208xrdb/t208xrdb.c
index 341453bc74e8c6b9d434fd264edccd4b9e1e5ab6..ad393dfc5c250ddc71999997596886ab8356443f 100644 (file)
--- a/board/freescale/t208xrdb/t208xrdb.c
+++ b/board/freescale/t208xrdb/t208xrdb.c
@@ -19,6 +19,7 @@
 #include <fm_eth.h>
 #include "t208xrdb.h"
 #include "cpld.h"
+#include "../common/vid.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -85,6 +86,12 @@ int board_early_init_r(void)
        setup_portals();
 #endif
 
+       /*
+        * Adjust core voltage according to voltage ID
+        * This function changes I2C mux to channel 2.
+        */
+       if (adjust_vdd(0))
+               printf("Warning: Adjusting core voltage failed.\n");
        return 0;
 }
 

diff --git a/include/configs/T208xRDB.h b/include/configs/T208xRDB.h
index faaf22c9bf379f577653c1f4296cfd21d60244c2..453cb88289527d1ab193d5f684e82bba5f93623c 100644 (file)
--- a/include/configs/T208xRDB.h
+++ b/include/configs/T208xRDB.h
@@ -448,6 +448,17 @@ unsigned long get_board_ddr_clk(void);
 #define I2C_MUX_PCA_ADDR_SEC2  0x76 /* I2C bus multiplexer,secondary 2 */
 #define I2C_MUX_CH_DEFAULT     0x8
 
+#define I2C_MUX_CH_VOL_MONITOR 0xa
+
+#define CONFIG_VID_FLS_ENV             "t208xrdb_vdd_mv"
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_VID
+#endif
+#define CONFIG_VOL_MONITOR_IR36021_SET
+#define CONFIG_VOL_MONITOR_IR36021_READ
+/* The lowest and highest voltage allowed for T208xRDB */
+#define VDD_MV_MIN                     819
+#define VDD_MV_MAX                     1212
 
 /*
  * RapidIO