usb: sam0: use TRIM registers when available

Newer SoCs like SAME54 provide dedicated registers to store
the USB trim configuration.

Use those registers if they are defined in ASF to access the
calibration data.

Signed-off-by: Benjamin Valentin <[email protected]>

Author: benpicco

drivers/usb/device/usb_dc_sam0.c

@@ -132,6 +132,9 @@ static void usb_sam0_load_padcal(void)
 	u32_t pad_transp;
 	u32_t pad_trim;
 
+#ifdef USB_FUSES_TRANSN_ADDR
+	pad_transn = *(uint32_t *)USB_FUSES_TRANSN_ADDR;
+#else
 	pad_transn = (*((uint32_t *)(NVMCTRL_OTP4) +
 			(NVM_USB_PAD_TRANSN_POS / 32)) >>
 		      (NVM_USB_PAD_TRANSN_POS % 32)) &
@@ -140,9 +143,13 @@ static void usb_sam0_load_padcal(void)
 	if (pad_transn == 0x1F) {
 		pad_transn = 5U;
 	}
+#endif
 
 	regs->PADCAL.bit.TRANSN = pad_transn;
 
+#ifdef USB_FUSES_TRANSP_ADDR
+	pad_transp = *(uint32_t *)USB_FUSES_TRANSP_ADDR;
+#else
 	pad_transp = (*((uint32_t *)(NVMCTRL_OTP4) +
 			(NVM_USB_PAD_TRANSP_POS / 32)) >>
 		      (NVM_USB_PAD_TRANSP_POS % 32)) &
@@ -151,9 +158,13 @@ static void usb_sam0_load_padcal(void)
 	if (pad_transp == 0x1F) {
 		pad_transp = 29U;
 	}
+#endif
 
 	regs->PADCAL.bit.TRANSP = pad_transp;
 
+#ifdef USB_FUSES_TRIM_ADDR
+	pad_trim = *(uint32_t *)USB_FUSES_TRIM_ADDR;
+#else
 	pad_trim = (*((uint32_t *)(NVMCTRL_OTP4) +
 		      (NVM_USB_PAD_TRIM_POS / 32)) >>
 		    (NVM_USB_PAD_TRIM_POS % 32)) &
@@ -162,6 +173,7 @@ static void usb_sam0_load_padcal(void)
 	if (pad_trim == 0x7) {
 		pad_trim = 3U;
 	}
+#endif
 
 	regs->PADCAL.bit.TRIM = pad_trim;
 }