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board/t208xrdb: VID support

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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>
This commit is contained in:
Ying Zhang 2015-03-10 14:21:36 +08:00 committed by York Sun
parent 9ca0d35f24
commit e5abb92c0b
2 changed files with 18 additions and 0 deletions
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7
board/freescale/t208xrdb/t208xrdb.c
View file

@ -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;
}

11
include/configs/T208xRDB.h
View file

@ -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