XAM3359和AM3359的区别

您好，按着你上午的提示，在board/ti/am335x中修改evm.c，去掉spl_board_init中的if判断如下：

void spl_board_init(void)
{
uchar pmic_status_reg;

/* init board_id, configure muxes */
board_init();

//if (!strncmp("A335BONE", header.name, 8))
if(0) {
/* BeagleBone PMIC Code */
if (i2c_probe(TPS65217_CHIP_PM))
return;

if (tps65217_reg_read(STATUS, &pmic_status_reg))
return;

/* Increase USB current limit to 1300mA */
if (tps65217_reg_write(PROT_LEVEL_NONE, POWER_PATH,
USB_INPUT_CUR_LIMIT_1300MA,
USB_INPUT_CUR_LIMIT_MASK))
printf("tps65217_reg_write failure\n");

/* Only perform PMIC configurations if board rev > A1 */
if (!strncmp(header.version, "00A1", 4))
return;

/* Set DCDC2 (MPU) voltage to 1.275V */
if (tps65217_voltage_update(DEFDCDC2,
DCDC_VOLT_SEL_1275MV)) {
printf("tps65217_voltage_update failure\n");
return;
}

/* Set LDO3, LDO4 output voltage to 3.3V */
if (tps65217_reg_write(PROT_LEVEL_2, DEFLS1,
LDO_VOLTAGE_OUT_3_3, LDO_MASK))
printf("tps65217_reg_write failure\n");

if (tps65217_reg_write(PROT_LEVEL_2, DEFLS2,
LDO_VOLTAGE_OUT_3_3, LDO_MASK))
printf("tps65217_reg_write failure\n");

if (!(pmic_status_reg & PWR_SRC_AC_BITMASK)) {
printf("No AC power, disabling frequency switch\n");
return;
}

/* Set MPU Frequency to 720MHz */
mpu_pll_config(MPUPLL_M_720);
}
else
{
uchar buf[4];
/*
* EVM PMIC code. All boards currently want an MPU voltage
* of 1.2625V and CORE voltage of 1.1375V to operate at
* 720MHz.
*/
if (i2c_probe(PMIC_CTRL_I2C_ADDR))
return;

/* VDD1/2 voltage selection register access by control i/f */
if (i2c_read(PMIC_CTRL_I2C_ADDR, PMIC_DEVCTRL_REG, 1, buf, 1))
return;

buf[0] |= PMIC_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;

if (i2c_write(PMIC_CTRL_I2C_ADDR, PMIC_DEVCTRL_REG, 1, buf, 1))
return;

if (!voltage_update(MPU, PMIC_OP_REG_SEL_1_2_6) &&
!voltage_update(CORE, PMIC_OP_REG_SEL_1_1_3))
/* Frequency switching for OPP 120 */
mpu_pll_config(MPUPLL_M_720);
}
}
#endif

试了试不行，又修改board_init如下：

int board_init(void)
{
/* Configure the i2c0 pin mux */
enable_i2c0_pin_mux();

i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);

if (read_eeprom())
goto err_out;

detect_daughter_board();

//if (!strncmp("SKU#01", header.config, 6)) {
// board_id = GP_BOARD;
// detect_daughter_board_profile();
//} else if (!strncmp("SKU#02", header.config, 6)) {
// board_id = IA_BOARD;
// detect_daughter_board_profile();
//} else if (!strncmp("SKU#03", header.config, 6)) {
// board_id = IPP_BOARD;
//} else if (!strncmp("A335BONE", header.name, 8)) {
// board_id = BONE_BOARD;
// profile = 1; /* profile 0 is internally considered as 1 */
// daughter_board_connected = 0;
//} else if (!strncmp("A335X_SK", header.name, 8)) {
// board_id = SK_BOARD;
// profile = 1; /* profile 0 is internally considered as 1 */
// daughter_board_connected = 0;
//} else {
// printf("Did not find a recognized configuration, "
// "assuming General purpose EVM in Profile 0 with "
// "Daughter board\n");
board_id = GP_BOARD;
profile = 1; /* profile 0 is internally considered as 1 */
daughter_board_connected = 1;
//}

configure_evm_pin_mux(board_id, header.version, profile, daughter_board_connected);

还是不行，那块XAM3359的板子在这两种情况都可以启动，但是AM3359的板子还是启动不了，

只输出：

U-Boot SPL 2011.09 (Jan 23 2013 - 12:50:30)
Texas Instruments Revision detection unimplemented
Could not probe the EEPROM; something fundamentally wrong on the I2C bus.
read_eeprom() failure. continuing with ddr3
Could not probe the EEPROM; something fundamentally wrong on the I2C bus.