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powerpc/board/t4240rdb: Enable 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 <york.sun@nxp.com>
This commit is contained in:
Ying Zhang 2016-01-22 12:15:13 +08:00 • committed by York Sun
parent cabe4d2f19
commit 2f66a828f7
3 changed files with 19 additions and 1 deletions
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2
board/freescale/common/vid.c
View file

@ -42,7 +42,7 @@ int __weak board_vdd_drop_compensation(void)
* The IR chip can show up under the following addresses:
* 0x08 (Verified on T1040RDB-PA,T4240RDB-PB,X-T4240RDB-16GPA)
* 0x09 (Verified on T1040RDB-PA)
* 0x38 (Verified on T2080QDS, T2081QDS)
* 0x38 (Verified on T2080QDS, T2081QDS, T4240RDB)
*/
static int find_ir_chip_on_i2c(void)
{

8
board/freescale/t4rdb/t4240rdb.c
View file

@ -20,6 +20,7 @@
#include "t4rdb.h"
#include "cpld.h"
#include "../common/vid.h"
DECLARE_GLOBAL_DATA_PTR;
@ -74,6 +75,13 @@ int board_early_init_r(void)
MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
0, flash_esel, BOOKE_PAGESZ_256M, 1);
/*
* 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;
}

10
include/configs/T4240RDB.h
View file

@ -606,6 +606,16 @@ unsigned long get_board_ddr_clk(void);
#define I2C_VOL_MONITOR_BUS_V_OVF 0x1
#define I2C_VOL_MONITOR_BUS_V_SHIFT 3
#define CONFIG_VID_FLS_ENV "t4240rdb_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 T4240RDB */
#define VDD_MV_MIN 819
#define VDD_MV_MAX 1212
/*
* eSPI - Enhanced SPI
*/