--- /dev/null
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef STM32_UART_REGS_H
+#define STM32_UART_REGS_H
+
+#include <utils_def.h>
+
+#define USART_CR1 U(0x00)
+#define USART_CR2 U(0x04)
+#define USART_CR3 U(0x08)
+#define USART_BRR U(0x0C)
+#define USART_GTPR U(0x10)
+#define USART_RTOR U(0x14)
+#define USART_RQR U(0x18)
+#define USART_ISR U(0x1C)
+#define USART_ICR U(0x20)
+#define USART_RDR U(0x24)
+#define USART_TDR U(0x28)
+#define USART_PRESC U(0x2C)
+
+/* USART_CR1 register fields */
+#define USART_CR1_UE BIT(0)
+#define USART_CR1_UESM BIT(1)
+#define USART_CR1_RE BIT(2)
+#define USART_CR1_TE BIT(3)
+#define USART_CR1_IDLEIE BIT(4)
+#define USART_CR1_RXNEIE BIT(5)
+#define USART_CR1_TCIE BIT(6)
+#define USART_CR1_TXEIE BIT(7)
+#define USART_CR1_PEIE BIT(8)
+#define USART_CR1_PS BIT(9)
+#define USART_CR1_PCE BIT(10)
+#define USART_CR1_WAKE BIT(11)
+#define USART_CR1_M (BIT(28) | BIT(12))
+#define USART_CR1_M0 BIT(12)
+#define USART_CR1_MME BIT(13)
+#define USART_CR1_CMIE BIT(14)
+#define USART_CR1_OVER8 BIT(15)
+#define USART_CR1_DEDT GENMASK(20, 16)
+#define USART_CR1_DEDT_0 BIT(16)
+#define USART_CR1_DEDT_1 BIT(17)
+#define USART_CR1_DEDT_2 BIT(18)
+#define USART_CR1_DEDT_3 BIT(19)
+#define USART_CR1_DEDT_4 BIT(20)
+#define USART_CR1_DEAT GENMASK(25, 21)
+#define USART_CR1_DEAT_0 BIT(21)
+#define USART_CR1_DEAT_1 BIT(22)
+#define USART_CR1_DEAT_2 BIT(23)
+#define USART_CR1_DEAT_3 BIT(24)
+#define USART_CR1_DEAT_4 BIT(25)
+#define USART_CR1_RTOIE BIT(26)
+#define USART_CR1_EOBIE BIT(27)
+#define USART_CR1_M1 BIT(28)
+#define USART_CR1_FIFOEN BIT(29)
+#define USART_CR1_TXFEIE BIT(30)
+#define USART_CR1_RXFFIE BIT(31)
+
+/* USART_CR2 register fields */
+#define USART_CR2_SLVEN BIT(0)
+#define USART_CR2_DIS_NSS BIT(3)
+#define USART_CR2_ADDM7 BIT(4)
+#define USART_CR2_LBDL BIT(5)
+#define USART_CR2_LBDIE BIT(6)
+#define USART_CR2_LBCL BIT(8)
+#define USART_CR2_CPHA BIT(9)
+#define USART_CR2_CPOL BIT(10)
+#define USART_CR2_CLKEN BIT(11)
+#define USART_CR2_STOP GENMASK(13, 12)
+#define USART_CR2_STOP_0 BIT(12)
+#define USART_CR2_STOP_1 BIT(13)
+#define USART_CR2_LINEN BIT(14)
+#define USART_CR2_SWAP BIT(15)
+#define USART_CR2_RXINV BIT(16)
+#define USART_CR2_TXINV BIT(17)
+#define USART_CR2_DATAINV BIT(18)
+#define USART_CR2_MSBFIRST BIT(19)
+#define USART_CR2_ABREN BIT(20)
+#define USART_CR2_ABRMODE GENMASK(22, 21)
+#define USART_CR2_ABRMODE_0 BIT(21)
+#define USART_CR2_ABRMODE_1 BIT(22)
+#define USART_CR2_RTOEN BIT(23)
+#define USART_CR2_ADD GENMASK(31, 24)
+
+/* USART_CR3 register fields */
+#define USART_CR3_EIE BIT(0)
+#define USART_CR3_IREN BIT(1)
+#define USART_CR3_IRLP BIT(2)
+#define USART_CR3_HDSEL BIT(3)
+#define USART_CR3_NACK BIT(4)
+#define USART_CR3_SCEN BIT(5)
+#define USART_CR3_DMAR BIT(6)
+#define USART_CR3_DMAT BIT(7)
+#define USART_CR3_RTSE BIT(8)
+#define USART_CR3_CTSE BIT(9)
+#define USART_CR3_CTSIE BIT(10)
+#define USART_CR3_ONEBIT BIT(11)
+#define USART_CR3_OVRDIS BIT(12)
+#define USART_CR3_DDRE BIT(13)
+#define USART_CR3_DEM BIT(14)
+#define USART_CR3_DEP BIT(15)
+#define USART_CR3_SCARCNT GENMASK(19, 17)
+#define USART_CR3_SCARCNT_0 BIT(17)
+#define USART_CR3_SCARCNT_1 BIT(18)
+#define USART_CR3_SCARCNT_2 BIT(19)
+#define USART_CR3_WUS GENMASK(21, 20)
+#define USART_CR3_WUS_0 BIT(20)
+#define USART_CR3_WUS_1 BIT(21)
+#define USART_CR3_WUFIE BIT(22)
+#define USART_CR3_TXFTIE BIT(23)
+#define USART_CR3_TCBGTIE BIT(24)
+#define USART_CR3_RXFTCFG GENMASK(27, 25)
+#define USART_CR3_RXFTCFG_0 BIT(25)
+#define USART_CR3_RXFTCFG_1 BIT(26)
+#define USART_CR3_RXFTCFG_2 BIT(27)
+#define USART_CR3_RXFTIE BIT(28)
+#define USART_CR3_TXFTCFG GENMASK(31, 29)
+#define USART_CR3_TXFTCFG_0 BIT(29)
+#define USART_CR3_TXFTCFG_1 BIT(30)
+#define USART_CR3_TXFTCFG_2 BIT(31)
+
+/* USART_BRR register fields */
+#define USART_BRR_DIV_FRACTION GENMASK(3, 0)
+#define USART_BRR_DIV_MANTISSA GENMASK(15, 4)
+
+/* USART_GTPR register fields */
+#define USART_GTPR_PSC GENMASK(7, 0)
+#define USART_GTPR_GT GENMASK(15, 8)
+
+/* USART_RTOR register fields */
+#define USART_RTOR_RTO GENMASK(23, 0)
+#define USART_RTOR_BLEN GENMASK(31, 24)
+
+/* USART_RQR register fields */
+#define USART_RQR_ABRRQ BIT(0)
+#define USART_RQR_SBKRQ BIT(1)
+#define USART_RQR_MMRQ BIT(2)
+#define USART_RQR_RXFRQ BIT(3)
+#define USART_RQR_TXFRQ BIT(4)
+
+/* USART_ISR register fields */
+#define USART_ISR_PE BIT(0)
+#define USART_ISR_FE BIT(1)
+#define USART_ISR_NE BIT(2)
+#define USART_ISR_ORE BIT(3)
+#define USART_ISR_IDLE BIT(4)
+#define USART_ISR_RXNE BIT(5)
+#define USART_ISR_TC BIT(6)
+#define USART_ISR_TXE BIT(7)
+#define USART_ISR_LBDF BIT(8)
+#define USART_ISR_CTSIF BIT(9)
+#define USART_ISR_CTS BIT(10)
+#define USART_ISR_RTOF BIT(11)
+#define USART_ISR_EOBF BIT(12)
+#define USART_ISR_UDR BIT(13)
+#define USART_ISR_ABRE BIT(14)
+#define USART_ISR_ABRF BIT(15)
+#define USART_ISR_BUSY BIT(16)
+#define USART_ISR_CMF BIT(17)
+#define USART_ISR_SBKF BIT(18)
+#define USART_ISR_RWU BIT(19)
+#define USART_ISR_WUF BIT(20)
+#define USART_ISR_TEACK BIT(21)
+#define USART_ISR_REACK BIT(22)
+#define USART_ISR_TXFE BIT(23)
+#define USART_ISR_RXFF BIT(24)
+#define USART_ISR_TCBGT BIT(25)
+#define USART_ISR_RXFT BIT(26)
+#define USART_ISR_TXFT BIT(27)
+
+/* USART_ICR register fields */
+#define USART_ICR_PECF BIT(0)
+#define USART_ICR_FECF BIT(1)
+#define USART_ICR_NCF BIT(2)
+#define USART_ICR_ORECF BIT(3)
+#define USART_ICR_IDLECF BIT(4)
+#define USART_ICR_TCCF BIT(6)
+#define USART_ICR_TCBGT BIT(7)
+#define USART_ICR_LBDCF BIT(8)
+#define USART_ICR_CTSCF BIT(9)
+#define USART_ICR_RTOCF BIT(11)
+#define USART_ICR_EOBCF BIT(12)
+#define USART_ICR_UDRCF BIT(13)
+#define USART_ICR_CMCF BIT(17)
+#define USART_ICR_WUCF BIT(20)
+
+/* USART_RDR register fields */
+#define USART_RDR_RDR GENMASK(8, 0)
+
+/* USART_TDR register fields */
+#define USART_TDR_TDR GENMASK(8, 0)
+
+/* USART_PRESC register fields */
+#define USART_PRESC_PRESCALER GENMASK(3, 0)
+
+#endif /* STM32_UART_REGS_H */