3 files changed, 16 insertions, 2 deletions
diff --git a/src/portable/chipidea/ci_hs/ci_hs_imxrt.h b/src/portable/chipidea/ci_hs/ci_hs_imxrt.h
index f0f918fe2..601e4d1c9 100644
--- a/src/portable/chipidea/ci_hs/ci_hs_imxrt.h
+++ b/src/portable/chipidea/ci_hs/ci_hs_imxrt.h
@@ -36,6 +36,16 @@ static const ci_hs_controller_t _ci_controller[] =
 
 #define CI_HS_REG(_port)        ((ci_hs_regs_t*) _ci_controller[_port].reg_base)
 
+enum {
+  // INCR16/8/4 followed by an unspecified-length burst for the remainder.
+  CI_HS_IMXRT_AHBBRST_INCR16_UNSPEC = 0x07u,
+};
+
+TU_ATTR_ALWAYS_INLINE static inline void ci_hs_imxrt_set_ahb_burst(uint8_t rhport) {
+  USB_Type *usb = (USB_Type *)_ci_controller[rhport].reg_base;
+  usb->SBUSCFG = USB_SBUSCFG_AHBBRST(CI_HS_IMXRT_AHBBRST_INCR16_UNSPEC);
+}
+
 //------------- DCD -------------//
 #define CI_DCD_INT_ENABLE(_p)   NVIC_EnableIRQ ((IRQn_Type)_ci_controller[_p].irqnum)
 #define CI_DCD_INT_DISABLE(_p)  NVIC_DisableIRQ((IRQn_Type)_ci_controller[_p].irqnum)
diff --git a/src/portable/chipidea/ci_hs/dcd_ci_hs.c b/src/portable/chipidea/ci_hs/dcd_ci_hs.c
index 32c701bfa..62d75b4d3 100644
--- a/src/portable/chipidea/ci_hs/dcd_ci_hs.c
+++ b/src/portable/chipidea/ci_hs/dcd_ci_hs.c
@@ -237,7 +237,9 @@ bool dcd_init(uint8_t rhport, const tusb_rhport_init_t *rh_init) {
   usbmode |= USBMODE_CM_DEVICE;
   dcd_reg->USBMODE = usbmode;
 
-  #if TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX)
+  #if CFG_TUSB_MCU == OPT_MCU_MIMXRT1XXX
+  ci_hs_imxrt_set_ahb_burst(rhport);
+  #elif TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX)
   ci_hs_lpc18_43_set_ahb_burst(rhport);
   #endif
 
diff --git a/src/portable/chipidea/ci_hs/hcd_ci_hs.c b/src/portable/chipidea/ci_hs/hcd_ci_hs.c
index c94ce810f..0fc8e4d70 100644
--- a/src/portable/chipidea/ci_hs/hcd_ci_hs.c
+++ b/src/portable/chipidea/ci_hs/hcd_ci_hs.c
@@ -82,7 +82,9 @@ bool hcd_init(uint8_t rhport, const tusb_rhport_init_t *rh_init) {
   hcd_reg->USBMODE = USBMODE_CM_HOST;
   #endif
 
-  #if TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX)
+  #if CFG_TUSB_MCU == OPT_MCU_MIMXRT1XXX
+  ci_hs_imxrt_set_ahb_burst(rhport);
+  #elif TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX)
   ci_hs_lpc18_43_set_ahb_burst(rhport);
   #endif