From: Ying Zhang b40530@freescale.com
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 --- board/freescale/t208xrdb/t208xrdb.c | 7 +++++++ include/configs/T208xRDB.h | 11 +++++++++++ 2 files changed, 18 insertions(+)
diff --git a/board/freescale/t208xrdb/t208xrdb.c b/board/freescale/t208xrdb/t208xrdb.c index 341453b..ad393df 100644 --- 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 db6b42e..2e48fc8 100644 --- a/include/configs/T208xRDB.h +++ b/include/configs/T208xRDB.h @@ -449,6 +449,17 @@ 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