8939sbl部分关闭LDO6电源延迟120ms之后再打开

0x00004055BMS_VM_S1_SAMPLE_INTERVAL_CTL Type: RW Clock:pbus_wrclk Reset State: 0x0AReset Name: PERPH_RB

Bits Name Description 7:0SAMPLE_INTERVAL_NOR-MAL_STATE Sample delay (10*value) in ms in betweenmeasurements normal state (S1). This is basically the sampling interval (ts) ofthe VADC measurements

0x0:SAMPLE_INTERVAL_NORMAL_0MS

0x1:SAMPLE_INTERVAL_NORMAL_10MS

0x2:SAMPLE_INTERVAL_NORMAL_20MS

0x3:SAMPLE_INTERVAL_NORMAL_30MS

0x4:SAMPLE_INTERVAL_NORMAL_40MS

0x5:SAMPLE_INTERVAL_NORMAL_50MS

0x6:SAMPLE_INTERVAL_NORMAL_60MS

0x7:SAMPLE_INTERVAL_NORMAL_70MS

0x8:SAMPLE_INTERVAL_NORMAL_80MS

0x9: SAMPLE_INTERVAL_NORMAL_90MS

0xA:SAMPLE_INTERVAL_NORMAL_100MS

。。。

0xFF: SAMPLE_INTERVAL_NORMAL_2550MS

 上面寄存器导致在sbl部分，LDO6每隔100ms就会拉一下电源，导致无法关闭，通过延迟周期解决：

//---------boot_images/core/systemdrivers/pmic/framework/src/pm_init.c

 

pm_err_flag_type pm_oem_init( void )

{

    pm_err_flag_type err_flag= PM_ERR_FLAG__SUCCESS;

    uint8 data = 0;

    char regdata[10];

    pm_clk_sleep_smpl(0,PM_CLK_SLEEP, PM_ON, PM_DELAY_1P0_SEC);

 

    pm_spmi_lite_write_byte(0,0x4055, 0xff, 0);

    pm_clk_busy_wait(300*1000);

    pm_spmi_lite_read_byte(0,0x4055, &data, 0);

   sprintf(regdata,"data=%d\n",data);

    boot_log_message(regdata);

 

   

    pm_ldo_sw_enable(0,PM_LDO_6, PM_OFF);

    pm_clk_busy_wait(120*1000);

    pm_ldo_sw_enable(0,PM_LDO_6, PM_ON);

 

    pm_spmi_lite_write_byte(0,0x4055, 0x0A, 0);

   

    pm_spmi_lite_read_byte(0,0x4055, &data, 0);

   sprintf(regdata,"data=%d\n",data);

    boot_log_message(regdata);

  

    return err_flag;

}