diff --git a/bsp/bsp_common/lvgl/lv_port_indev.c b/bsp/bsp_common/lvgl/lv_port_indev.c
index 0b4cb623..b11857f6 100644
--- a/bsp/bsp_common/lvgl/lv_port_indev.c
+++ b/bsp/bsp_common/lvgl/lv_port_indev.c
@@ -304,7 +304,7 @@ static void keypad_init(void)
     adc_channel_cfg.neg_channel = negChList;
     adc_channel_cfg.num = 1;
 
-    adc_register(ADC0_INDEX, "adc_key", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_key");
 
     adc_key = device_find("adc_key");
 
diff --git a/drivers/bl602_driver/startup/system_bl602.c b/drivers/bl602_driver/startup/system_bl602.c
index ba8b071f..d4ef06af 100644
--- a/drivers/bl602_driver/startup/system_bl602.c
+++ b/drivers/bl602_driver/startup/system_bl602.c
@@ -3,10 +3,6 @@
 #include "bl602_hbn.h"
 #include "system_bl602.h"
 
-#ifdef BOOTROM
-#include "bflb_bootrom.h"
-#endif
-
 /*----------------------------------------------------------------------------
   Define clocks
  *----------------------------------------------------------------------------*/
@@ -34,49 +30,6 @@ void SystemInit(void)
     uint32_t i = 0;
     uint32_t tmpVal = 0;
 
-#ifdef BOOTROM
-    extern void GLB_Power_On_LDO18_IO(void);
-    extern void WDT_Disable(void);
-    extern void HBN_Clear_RTC_INT(void);
-
-    BMX_Cfg_Type bmxCfg = {
-        .timeoutEn = 0,
-        .errEn = DISABLE,
-        .arbMod = BMX_ARB_FIX
-    };
-    L1C_BMX_Cfg_Type l1cBmxCfg = {
-        .timeoutEn = 0,
-        .errEn = DISABLE,
-        .arbMod = L1C_BMX_ARB_FIX,
-    };
-
-    /* NP boot log Flag */
-    p = (uint32_t *)(BFLB_BOOTROM_NP_BOOT_LOG_ADDR);
-    *p = 0x5A5AA5A5;
-    /*diable BMX error incase Sbooten=0xf,while user send vector(core) reset and CPU read deadbeef,
-	if not disable this bit, CPU will also get hardfault at the same time*/
-    //GLB->bmx_cfg1.BF.bmx_err_en=0;
-    //GLB->bmx_cfg1.BF.bmx_timeout_en=0;
-    //GLB->bmx_cfg2.BF.bmx_err_addr_dis=1;
-    GLB_BMX_Init(&bmxCfg);
-    GLB_BMX_Addr_Monitor_Disable();
-    //L1C->l1c_config.BF.l1c_bmx_err_en=0;
-    //L1C->l1c_config.BF.l1c_bmx_timeout_en=0;
-    //L1C->l1c_bmx_err_addr_en.BF.l1c_bmx_err_addr_dis=1;
-    L1C_BMX_Init(&l1cBmxCfg);
-    L1C_BMX_Addr_Monitor_Disable();
-    //L1C->l1c_config.BF.l1c_way_dis=0xf;
-    L1C_Set_Way_Disable(0x0f);
-    /* Disable Watchdog */
-    WDT_Disable();
-    /* Clear RTC */
-    HBN_Clear_RTC_INT();
-    /* Make OCRAM Idle from retention or sleep */
-    GLB_Set_OCRAM_Idle();
-    /* Disable embedded flash power up*/
-    HBN_Set_Embedded_Flash_Pullup(DISABLE);
-#endif
-
     /* disable hardware_pullup_pull_down (reg_en_hw_pu_pd = 0) */
     tmpVal = BL_RD_REG(HBN_BASE, HBN_IRQ_MODE);
     tmpVal = BL_CLR_REG_BIT(tmpVal, HBN_REG_EN_HW_PU_PD);
@@ -123,16 +76,9 @@ void SystemInit(void)
 
     /* init bor for all platform */
     system_bor_init();
-
-#ifdef BOOTROM
-    /*Power up soc 11 power domain,TODO: This should be optional */
-    //AON_Power_On_SOC_11();
-    /* Record LDO18 pu flag before power up. This maybe not neccessary but copy from 606*/
-    //BL_WR_WORD(BFLB_BOOTROM_AP_BOOT_LOG_ADDR,GLB->ldo18io.BF.pu_ldo18io);
-    /* Power up flash power*/
-    //GLB_Power_On_LDO18_IO();
-#endif
 }
+
 void System_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority)
 {
+
 }
diff --git a/drivers/bl702_driver/startup/system_bl702.c b/drivers/bl702_driver/startup/system_bl702.c
index 3e12893e..1276ade3 100644
--- a/drivers/bl702_driver/startup/system_bl702.c
+++ b/drivers/bl702_driver/startup/system_bl702.c
@@ -26,10 +26,6 @@
 #include "bl702_hbn.h"
 #include "system_bl702.h"
 
-#ifdef BOOTROM
-#include "bflb_bootrom.h"
-#endif
-
 #ifdef BFLB_EFLASH_LOADER
 #include "bl702_usb.h"
 void USB_DoNothing_IRQHandler(void)
@@ -144,18 +140,11 @@ void SystemInit(void)
     /* init bor for all platform */
     system_bor_init();
 
-#ifdef BOOTROM
-    /*Power up soc 11 power domain,TODO: This should be optional */
-    //AON_Power_On_SOC_11();
-    /* Record LDO18 pu flag before power up. This maybe not neccessary but copy from 606*/
-    //BL_WR_WORD(BFLB_BOOTROM_AP_BOOT_LOG_ADDR,GLB->ldo18io.BF.pu_ldo18io);
-    /* Power up flash power*/
-    //GLB_Power_On_LDO18_IO();
-#endif
-
     /* release 64K OCARAM for appliction */
     GLB_Set_EM_Sel(GLB_EM_0KB);
 }
+
 void System_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority)
 {
+    
 }
diff --git a/examples/adc/adc_continuous_differential/main.c b/examples/adc/adc_continuous_differential/main.c
index 204f1599..f73c6ae0 100644
--- a/examples/adc/adc_continuous_differential/main.c
+++ b/examples/adc/adc_continuous_differential/main.c
@@ -43,7 +43,7 @@ int main(void)
     adc_channel_cfg.num = 1;
 
     MSG("adc one-shot differential test case \r\n");
-    adc_register(ADC0_INDEX, "adc_one_diff", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_one_diff");
 
     adc_test = device_find("adc_one_diff");
 
diff --git a/examples/adc/adc_continuous_single_ended/main.c b/examples/adc/adc_continuous_single_ended/main.c
index 822e38a7..53448e23 100644
--- a/examples/adc/adc_continuous_single_ended/main.c
+++ b/examples/adc/adc_continuous_single_ended/main.c
@@ -41,7 +41,7 @@ int main(void)
     adc_channel_cfg.num = 1;
 
     MSG("adc continue single ended test case \r\n");
-    adc_register(ADC0_INDEX, "adc_continue_single", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_continue_single");
 
     adc_test = device_find("adc_continue_single");
 
diff --git a/examples/adc/adc_key/main.c b/examples/adc/adc_key/main.c
index 190561a4..d355e070 100644
--- a/examples/adc/adc_key/main.c
+++ b/examples/adc/adc_key/main.c
@@ -174,7 +174,7 @@ int main(void)
     adc_channel_cfg.neg_channel = negChList;
     adc_channel_cfg.num = 1;
 
-    adc_register(ADC0_INDEX, "adc_key", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_key");
 
     adc_key = device_find("adc_key");
 
diff --git a/examples/adc/adc_one_shot_differential/main.c b/examples/adc/adc_one_shot_differential/main.c
index 9cbdb0b5..43ebb278 100644
--- a/examples/adc/adc_one_shot_differential/main.c
+++ b/examples/adc/adc_one_shot_differential/main.c
@@ -43,7 +43,7 @@ int main(void)
     adc_channel_cfg.num = 1;
 
     MSG("adc one-shot differential test case \r\n");
-    adc_register(ADC0_INDEX, "adc_one_diff", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_one_diff");
 
     adc_test = device_find("adc_one_diff");
 
diff --git a/examples/adc/adc_one_shot_single_ended/main.c b/examples/adc/adc_one_shot_single_ended/main.c
index bac34f3f..e0080c0d 100644
--- a/examples/adc/adc_one_shot_single_ended/main.c
+++ b/examples/adc/adc_one_shot_single_ended/main.c
@@ -43,7 +43,7 @@ int main(void)
     adc_channel_cfg.num = 1;
 
     MSG("adc one-shot single ended test case \r\n");
-    adc_register(ADC0_INDEX, "adc_one_single", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_one_single");
 
     adc_test = device_find("adc_one_single");
 
diff --git a/examples/adc/adc_scan_single_ended/main.c b/examples/adc/adc_scan_single_ended/main.c
index bfa9943b..3915d258 100644
--- a/examples/adc/adc_scan_single_ended/main.c
+++ b/examples/adc/adc_scan_single_ended/main.c
@@ -43,7 +43,7 @@ int main(void)
     adc_channel_cfg.num = 2;
 
     MSG("adc one-shot single ended test case \r\n");
-    adc_register(ADC0_INDEX, "adc_one_single", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_one_single");
 
     adc_test = device_find("adc_one_single");
 
diff --git a/examples/adc/adc_tsen/main.c b/examples/adc/adc_tsen/main.c
index 8b97ec45..11d552d8 100644
--- a/examples/adc/adc_tsen/main.c
+++ b/examples/adc/adc_tsen/main.c
@@ -43,7 +43,7 @@ int main(void)
     adc_channel_cfg.num = 1;
 
     MSG("adc tsen test case \r\n");
-    adc_register(ADC0_INDEX, "adc_tsen", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_tsen");
 
     adc_tsen = device_find("adc_tsen");
 
diff --git a/examples/adc/adc_vbat_poll/main.c b/examples/adc/adc_vbat_poll/main.c
index a953e198..3ebc149a 100644
--- a/examples/adc/adc_vbat_poll/main.c
+++ b/examples/adc/adc_vbat_poll/main.c
@@ -40,7 +40,7 @@ int main(void)
     adc_channel_cfg.neg_channel = negChList;
     adc_channel_cfg.num = 1;
 
-    adc_register(ADC0_INDEX, "adc_vbat_test", DEVICE_OFLAG_STREAM_RX);
+    adc_register(ADC0_INDEX, "adc_vbat_test");
 
     vbat_test = device_find("adc_vbat_test");
 
diff --git a/examples/boot2_iap/bflb_eflash_loader_uart.c b/examples/boot2_iap/bflb_eflash_loader_uart.c
index 8ceebd97..8d7a7852 100644
--- a/examples/boot2_iap/bflb_eflash_loader_uart.c
+++ b/examples/boot2_iap/bflb_eflash_loader_uart.c
@@ -76,7 +76,7 @@ static void ATTR_TCM_SECTION uart0_irq_callback(struct device *dev, void *args,
 
 static void bflb_eflash_loader_usart_if_init(uint32_t bdrate)
 {
-    uart_register(0, "download_uart", DEVICE_OFLAG_RDWR);
+    uart_register(0, "download_uart");
     download_uart = device_find("download_uart");
 
     if (download_uart) {
diff --git a/examples/i2s/i2s_play_from_sd/wav_play_form_sd_card.c b/examples/i2s/i2s_play_from_sd/wav_play_form_sd_card.c
index 045b3f1e..b340f7b2 100644
--- a/examples/i2s/i2s_play_from_sd/wav_play_form_sd_card.c
+++ b/examples/i2s/i2s_play_from_sd/wav_play_form_sd_card.c
@@ -169,7 +169,7 @@ static int sd_wav_play_init(audio_dev_t *audio_dev, const TCHAR *path)
     if (audio_dev->device) {
         device_close(audio_dev->device);
     } else {
-        i2s_register(I2S0_INDEX, "I2S", DEVICE_OFLAG_RDWR);
+        i2s_register(I2S0_INDEX, "I2S");
         audio_dev->device = device_find("I2S");
     }
 
@@ -178,7 +178,7 @@ static int sd_wav_play_init(audio_dev_t *audio_dev, const TCHAR *path)
     if (dma_ch2) {
         device_close(dma_ch2);
     } else {
-        dma_register(DMA0_CH2_INDEX, "i2s_ch2", DEVICE_OFLAG_RDWR);
+        dma_register(DMA0_CH2_INDEX, "i2s_ch2");
         dma_ch2 = device_find("i2s_ch2");
     }