stm32: extract l0 lptimer stuff from timer.h to common lptimer.h

lptimer peripheral is present on f4,f7,l0,l4,g0,g4 and prob others. Extract
content from stm32l0 timer.h and make it usable by other chips.

4 files changed, 337 insertions, 166 deletions

diff --git a/include/libopencm3/stm32/common/lptimer_common_all.h b/include/libopencm3/stm32/common/lptimer_common_all.h
new file mode 100644
index 00000000..d1f6187f
--- /dev/null
+++ b/include/libopencm3/stm32/common/lptimer_common_all.h
@@ -0,0 +1,261 @@
+/** @addtogroup lptimer_defines
+ *
+ * @author @htmlonly &copy; @endhtmlonly 2009 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Piotr Esden-Tempski <piotr@esden.net>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**@{*/
+
+/** @cond */
+#if defined(LIBOPENCM3_LPTIMER_H)
+/** @endcond */
+#ifndef LIBOPENCM3_LPTIMER_COMMON_H
+#define LIBOPENCM3_LPTIMER_COMMON_H
+
+/* --- LPTIM (low power timer) ------------------------------------------- */
+
+#define LPTIM_ISR(tim_base)		MMIO32((tim_base) + 0x00)
+#define LPTIM_ICR(tim_base)		MMIO32((tim_base) + 0x04)
+#define LPTIM_IER(tim_base)		MMIO32((tim_base) + 0x08)
+#define LPTIM_CFGR(tim_base)		MMIO32((tim_base) + 0x0C)
+#define LPTIM_CR(tim_base)		MMIO32((tim_base) + 0x10)
+#define LPTIM_CMP(tim_base)		MMIO32((tim_base) + 0x14)
+#define LPTIM_ARR(tim_base)		MMIO32((tim_base) + 0x18)
+#define LPTIM_CNT(tim_base)		MMIO32((tim_base) + 0x1C)
+
+#define LPTIM1_ISR			LPTIM_ISR(LPTIM1_BASE)
+#define LPTIM1_ICR			LPTIM_ICR(LPTIM1_BASE)
+#define LPTIM1_IER			LPTIM_IER(LPTIM1_BASE)
+#define LPTIM1_CFGR			LPTIM_CFGR(LPTIM1_BASE)
+#define LPTIM1_CR			LPTIM_CR(LPTIM1_BASE)
+#define LPTIM1_CMP			LPTIM_CMP(LPTIM1_BASE)
+#define LPTIM1_ARR			LPTIM_ARR(LPTIM1_BASE)
+#define LPTIM1_CNT			LPTIM_CNT(LPTIM1_BASE)
+
+#if defined(LPTIM2_BASE)
+#define LPTIM2_ISR			LPTIM_ISR(LPTIM2_BASE)
+#define LPTIM2_ICR			LPTIM_ICR(LPTIM2_BASE)
+#define LPTIM2_IER			LPTIM_IER(LPTIM2_BASE)
+#define LPTIM2_CFGR			LPTIM_CFGR(LPTIM2_BASE)
+#define LPTIM2_CR			LPTIM_CR(LPTIM2_BASE)
+#define LPTIM2_CMP			LPTIM_CMP(LPTIM2_BASE)
+#define LPTIM2_ARR			LPTIM_ARR(LPTIM2_BASE)
+#define LPTIM2_CNT			LPTIM_CNT(LPTIM2_BASE)
+#endif
+
+/** @defgroup lptim_isr LPTIM_ISR Interrupt and Status Register
+@{*/
+
+/** LPTIM_ISR_CMPM Compare match */
+#define LPTIM_ISR_CMPM			(1 << 0)
+
+/** LPTIM_ISR_ARRM Autoreload match */
+#define LPTIM_ISR_ARRM			(1 << 1)
+
+/** LPTIM_ISR_EXTTRIG External trigger edge event */
+#define LPTIM_ISR_EXTTRIG		(1 << 2)
+
+/** LPTIM_ISR_CMPOK Compare register update OK */
+#define LPTIM_ISR_CMPOK			(1 << 3)
+
+/** LPTIM_ISR_ARROK Autoreload register update OK */
+#define LPTIM_ISR_ARROK			(1 << 4)
+
+/** LPTIM_ISR_UP Counter direction change down to up */
+#define LPTIM_ISR_UP			(1 << 5)
+
+/** LPTIM_ISR_DOWN Counter direction change up to down */
+#define LPTIM_ISR_DOWN			(1 << 6)
+
+/**@}*/
+
+/** @defgroup lptim_icr LPTIM_ICR Interrupt Clear Register 
+@{*/
+
+/** LPTIM_ICR_CMPMCF compare match Clear Flag */
+#define LPTIM_ICR_CMPMCF		(1 << 0)
+
+/** LPTIM_ICR_ARRMCF Autoreload match Clear Flag */
+#define LPTIM_ICR_ARRMCF		(1 << 1)
+
+/** LPTIM_ICR_EXTTRIGCF External trigger valid edge Clear Flag */
+#define LPTIM_ICR_EXTTRIGCF		(1 << 2)
+
+/** LPTIM_ICR_CMPOKCF Compare register update OK Clear Flag */
+#define LPTIM_ICR_CMPOKCF		(1 << 3)
+
+/** LPTIM_ICR_ARROKCF Autoreload register update OK Clear Flag */
+#define LPTIM_ICR_ARROKCF		(1 << 4)
+
+/** LPTIM_ICR_UPCF Direction change to UP Clear Flag */
+#define LPTIM_ICR_UPCF			(1 << 5)
+
+/** LPTIM_ICR_DOWNCF Direction change to down Clear Flag */
+#define LPTIM_ICR_DOWNCF		(1 << 6)
+
+/**@}*/
+
+/** @defgroup lptim_ier LPTIM_IER Interrupt Enable Register
+@{*/
+
+/** LPTIM_IER_CMPMIE Compare match Interrupt Enable */
+#define LPTIM_IER_CMPMIE		(1 << 0)
+
+/** LPTIM_IER_ARRMIE Autoreload match Interrupt Enable */
+#define LPTIM_IER_ARRMIE		(1 << 1)
+
+/** LPTIM_IER_EXTTRIGIE External trigger valid edge Interrupt Enable */
+#define LPTIM_IER_EXTTRIGIE		(1 << 2)
+
+/** LPTIM_IER_CMPOKIE Compare register update OK Interrupt Enable */
+#define LPTIM_IER_CMPOKIE		(1 << 3)
+
+/** LPTIM_IER_ARROKIE Autoreload register update OK Interrupt Enable */
+#define LPTIM_IER_ARROKIE		(1 << 4)
+
+/** LPTIM_IER_UPIE Direction change to UP Interrupt Enable */
+#define LPTIM_IER_UPIE			(1 << 5)
+
+/** LPTIM_IER_DOWNIE Direction change to down Interrupt Enable */
+#define LPTIM_IER_DOWNIE		(1 << 6)
+
+/**@}*/
+
+/** @defgroup lptim_cfgr LPTIM_CFGR Configuration Register
+@{*/
+
+/** CKSEL: Select internal (0) or external clock source (1) */
+#define LPTIM_CFGR_CKSEL		(1 << 0)
+
+#define LPTIM_CFGR_CKPOL_SHIFT		1
+#define LPTIM_CFGR_CKPOL_MASK		0x03
+#define LPTIM_CFGR_CKPOL		(3 << LPTIM_CFGR_CKPOL_SHIFT)
+/** @defgroup lptim_cfgr_ckpol LPTIM_CFGR CKPOL Clock Polarity
+@{*/
+#define LPTIM_CFGR_CKPOL_RISING		(0 << LPTIM_CFGR_CKPOL_SHIFT)
+#define LPTIM_CFGR_CKPOL_FALLING	(1 << LPTIM_CFGR_CKPOL_SHIFT)
+#define LPTIM_CFGR_CKPOL_BOTH		(2 << LPTIM_CFGR_CKPOL_SHIFT)
+#define LPTIM_CFGR_CKPOL_ENC_1		(0 << LPTIM_CFGR_CKPOL_SHIFT)
+#define LPTIM_CFGR_CKPOL_ENC_2		(1 << LPTIM_CFGR_CKPOL_SHIFT)
+#define LPTIM_CFGR_CKPOL_ENC_3		(2 << LPTIM_CFGR_CKPOL_SHIFT)
+/**@}*/
+
+#define LPTIM_CFGR_CKFLT_SHIFT		3
+#define LPTIM_CFGR_CKFLT_MASK		0x03
+#define LPTIM_CFGR_CKFLT		(3 << LPTIM_CFGR_CKFLT_SHIFT)
+/** @defgroup lptim_cfgr_ckflt LPTIM_CFGR CKFLT Configurable digital filter for external clock
+@{*/
+#define LPTIM_CFGR_CKFLT_2		(1 << LPTIM_CFGR_CKFLT_SHIFT)
+#define LPTIM_CFGR_CKFLT_4		(2 << LPTIM_CFGR_CKFLT_SHIFT)
+#define LPTIM_CFGR_CKFLT_8		(3 << LPTIM_CFGR_CKFLT_SHIFT)
+/**@}*/
+
+#define LPTIM_CFGR_TRGFLT_SHIFT		6
+#define LPTIM_CFGR_TRGFLT_MASK		0x03
+#define LPTIM_CFGR_TRGFLT		(3 << LPTIM_CFGR_TRGFLT_SHIFT)
+/** @defgroup lptim_cfgr_trgflt LPTIM_CFGR TRGFLT Configurable digital filter for trigger
+@{*/
+#define LPTIM_CFGR_TRGFLT_2		(1 << LPTIM_CFGR_TRGFLT_SHIFT)
+#define LPTIM_CFGR_TRGFLT_4		(2 << LPTIM_CFGR_TRGFLT_SHIFT)
+#define LPTIM_CFGR_TRGFLT_8		(3 << LPTIM_CFGR_TRGFLT_SHIFT)
+/**@}*/
+
+#define LPTIM_CFGR_PRESC_SHIFT		9
+#define LPTIM_CFGR_PRESC_MASK		0x07
+#define LPTIM_CFGR_PRESC		(7 << LPTIM_CFGR_PRESC_SHIFT)
+/** @defgroup lptim_cfgr_presc LPTIM_CFGR PRESC Clock prescaler
+@{*/
+#define LPTIM_CFGR_PRESC_1		(0 << LPTIM_CFGR_PRESC_SHIFT)
+#define LPTIM_CFGR_PRESC_2		(1 << LPTIM_CFGR_PRESC_SHIFT)
+#define LPTIM_CFGR_PRESC_4		(2 << LPTIM_CFGR_PRESC_SHIFT)
+#define LPTIM_CFGR_PRESC_8		(3 << LPTIM_CFGR_PRESC_SHIFT)
+#define LPTIM_CFGR_PRESC_16		(4 << LPTIM_CFGR_PRESC_SHIFT)
+#define LPTIM_CFGR_PRESC_32		(5 << LPTIM_CFGR_PRESC_SHIFT)
+#define LPTIM_CFGR_PRESC_64		(6 << LPTIM_CFGR_PRESC_SHIFT)
+#define LPTIM_CFGR_PRESC_128		(7 << LPTIM_CFGR_PRESC_SHIFT)
+/**@}*/
+
+#define LPTIM_CFGR_TRIGSEL_SHIFT	13
+#define LPTIM_CFGR_TRIGSEL_MASK		0x07
+#define LPTIM_CFGR_TRIGSEL		(7 << LPTIM_CFGR_TRIGSEL_SHIFT)
+/** @defgroup lptim_cfgr_trigsel LPTIM_CFGR TRIGSEL Trigger selector
+@{*/
+#define LPTIM_CFGR_TRIGSEL_EXT_TRIG0	(0 << LPTIM_CFGR_TRIGSEL_SHIFT)
+#define LPTIM_CFGR_TRIGSEL_EXT_TRIG1	(1 << LPTIM_CFGR_TRIGSEL_SHIFT)
+#define LPTIM_CFGR_TRIGSEL_EXT_TRIG2	(2 << LPTIM_CFGR_TRIGSEL_SHIFT)
+#define LPTIM_CFGR_TRIGSEL_EXT_TRIG3	(3 << LPTIM_CFGR_TRIGSEL_SHIFT)
+#define LPTIM_CFGR_TRIGSEL_EXT_TRIG4	(4 << LPTIM_CFGR_TRIGSEL_SHIFT)
+/* 5 is reserved */
+#define LPTIM_CFGR_TRIGSEL_EXT_TRIG6	(6 << LPTIM_CFGR_TRIGSEL_SHIFT)
+#define LPTIM_CFGR_TRIGSEL_EXT_TRIG7	(7 << LPTIM_CFGR_TRIGSEL_SHIFT)
+/**@}*/
+
+#define LPTIM_CFGR_TRIGEN_SHIFT		17
+#define LPTIM_CFGR_TRIGEN_MASK		0x07
+#define LPTIM_CFGR_TRIGEN		(3 << LPTIM_CFGR_TRIGEN_SHIFT)
+/** @defgroup LPTIM_CFGR_TRIGEN LPTIM_CFGR TRIGEN Trigger enable and polarity
+@{*/
+#define LPTIM_CFGR_TRIGEN_SW		(0 << LPTIM_CFGR_TRIGEN_SHIFT)
+#define LPTIM_CFGR_TRIGEN_RISING	(1 << LPTIM_CFGR_TRIGEN_SHIFT)
+#define LPTIM_CFGR_TRIGEN_FALLING	(2 << LPTIM_CFGR_TRIGEN_SHIFT)
+#define LPTIM_CFGR_TRIGEN_BOTH		(3 << LPTIM_CFGR_TRIGEN_SHIFT)
+/**@}*/
+
+/** TIMOUT: Timeout enable */
+#define LPTIM_CFGR_TIMOUT		(1 << 19)
+
+/** WAVE: Waveform shape */
+#define LPTIM_CFGR_WAVE			(1 << 20)
+
+/** WAVPOL: Waveform shape polarity */
+#define LPTIM_CFGR_WAVPOL		(1 << 21)
+
+/** PRELOAD: Register update mode */
+#define LPTIM_CFGR_PRELOAD		(1 << 22)
+
+/** COUNTMODE: Counter mode enable */
+#define LPTIM_CFGR_COUNTMODE		(1 << 23)
+
+/** ENC: Encoder mode enable */
+#define LPTIM_CFGR_ENC			(1 << 24)
+
+/**@}*/
+
+/** @defgroup lptim_cr LPTIM_CR Control Register
+@{*/
+
+/** ENABLE: LPTIM Enable */
+#define LPTIM_CR_ENABLE			(1 << 0)
+
+/** SNGSTRT: Start in Single Mode */
+#define LPTIM_CR_SNGSTRT		(1 << 1)
+
+/** CNGSTRT: Start in Continuous Mode */
+#define LPTIM_CR_CNTSTRT		(1 << 2)
+
+/**@}*/
+#endif
+/** @cond */
+#else
+#warning "lptimer_common_all.h should not be included directly, only via lptimer.h"
+#endif
+/** @endcond */
+/**@}*/
diff --git a/include/libopencm3/stm32/l0/lptimer.h b/include/libopencm3/stm32/l0/lptimer.h
new file mode 100644
index 00000000..e6d99d8c
--- /dev/null
+++ b/include/libopencm3/stm32/l0/lptimer.h
@@ -0,0 +1,46 @@
+/** @defgroup lptimer_defines LPTIM Defines
+ *
+ * @ingroup STM32L0xx_defines
+ * 
+ * @brief <b>libopencm3 Defined Constants and Types for the STM32L0xx Low Power Timer</b>
+ *
+ * @version 1.0.0
+ *
+ * LGPL License Terms @ref lgpl_license
+ *  */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2019 Guillaume Revaillot <g.revaillot@gmail.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBOPENCM3_LPTIMER_H
+#define LIBOPENCM3_LPTIMER_H
+/**@{*/
+
+#include <libopencm3/stm32/common/lptimer_common_all.h>
+
+/** @defgroup lptim_reg_base Low Power Timer register base addresses
+@{*/
+#define LPTIM1				LPTIM1_BASE
+/**@}*/
+
+BEGIN_DECLS
+
+END_DECLS
+
+/**@}*/
+#endif
diff --git a/include/libopencm3/stm32/l0/timer.h b/include/libopencm3/stm32/l0/timer.h
index 3d6323e2..98772811 100644
--- a/include/libopencm3/stm32/l0/timer.h
+++ b/include/libopencm3/stm32/l0/timer.h
@@ -96,174 +96,8 @@ LGPL License Terms @ref lgpl_license
 #define TIM22_OR_TI1_RMP_COMP2_OUT	(1 << TIM22_OR_TI1_RMP_SHIFT)
 #define TIM22_OR_TI1_RMP_COMP1_OUT	(2 << TIM22_OR_TI1_RMP_SHIFT)
 
-/* --- LPTIM (low power timer) ------------------------------------------- */
-
-#define LPTIM_ISR(tim_base)		MMIO32((tim_base) + 0x00)
-#define LPTIM_ICR(tim_base)		MMIO32((tim_base) + 0x04)
-#define LPTIM_IER(tim_base)		MMIO32((tim_base) + 0x08)
-#define LPTIM_CFGR(tim_base)		MMIO32((tim_base) + 0x0C)
-#define LPTIM_CR(tim_base)		MMIO32((tim_base) + 0x10)
-#define LPTIM_CMP(tim_base)		MMIO32((tim_base) + 0x14)
-#define LPTIM_ARR(tim_base)		MMIO32((tim_base) + 0x18)
-#define LPTIM_CNT(tim_base)		MMIO32((tim_base) + 0x1C)
-
-#define LPTIM1_ISR			LPTIM_ISR(LPTIM1_BASE)
-#define LPTIM1_ICR			LPTIM_ICR(LPTIM1_BASE)
-#define LPTIM1_IER			LPTIM_IER(LPTIM1_BASE)
-#define LPTIM1_CFGR			LPTIM_CFGR(LPTIM1_BASE)
-#define LPTIM1_CR			LPTIM_CR(LPTIM1_BASE)
-#define LPTIM1_CMP			LPTIM_CMP(LPTIM1_BASE)
-#define LPTIM1_ARR			LPTIM_ARR(LPTIM1_BASE)
-#define LPTIM1_CNT			LPTIM_CNT(LPTIM1_BASE)
-
-/** @defgroup lptim_isr LPTIM_ISR Interrupt and Status Register
-@{*/
-#define LPTIM_ISR_CMPM			(1 << 0)
-#define LPTIM_ISR_ARRM			(1 << 1)
-#define LPTIM_ISR_EXTTRIG		(1 << 2)
-#define LPTIM_ISR_CMPOK			(1 << 3)
-#define LPTIM_ISR_ARROK			(1 << 4)
-#define LPTIM_ISR_UP			(1 << 5)
-#define LPTIM_ISR_DOWN			(1 << 6)
-/**@}*/
-
-/** @defgroup lptim_icr LPTIM_ICR Interrupt Clear Register 
-@{*/
-#define LPTIM_ICR_CMPMCF		(1 << 0)
-#define LPTIM_ICR_ARRMCF		(1 << 1)
-#define LPTIM_ICR_EXTTRIGCF		(1 << 2)
-#define LPTIM_ICR_CMPOKCF		(1 << 3)
-#define LPTIM_ICR_ARROKCF		(1 << 4)
-#define LPTIM_ICR_UPCF			(1 << 5)
-#define LPTIM_ICR_DOWNCF		(1 << 6)
-/**@}*/
-
-/** @defgroup lptim_ier LPTIM_IER Interrupt Enable Register
-@{*/
-#define LPTIM_IER_CMPMIE		(1 << 0)
-#define LPTIM_IER_ARRMIE		(1 << 1)
-#define LPTIM_IER_EXTTRIGIE		(1 << 2)
-#define LPTIM_IER_CMPOKIE		(1 << 3)
-#define LPTIM_IER_ARROKIE		(1 << 4)
-#define LPTIM_IER_UPIE			(1 << 5)
-#define LPTIM_IER_DOWNIE		(1 << 6)
-/**@}*/
-
-/** @defgroup lptim_cfgr LPTIM_CFGR Configuration Register
-@{*/
-
-/** CKSEL: Select internal (0) or external clock source (1) **/
-#define LPTIM_CFGR_CKSEL		(1 << 0)
-
-#define LPTIM_CFGR_CKPOL_SHIFT		1
-#define LPTIM_CFGR_CKPOL_MASK		0x03
-#define LPTIM_CFGR_CKPOL		(3 << LPTIM_CFGR_CKPOL_SHIFT)
-/** @defgroup lptim_cfgr_ckpol LPTIM_CFGR CKPOL Clock Polarity
-@{*/
-#define LPTIM_CFGR_CKPOL_RISING		(0 << LPTIM_CFGR_CKPOL_SHIFT)
-#define LPTIM_CFGR_CKPOL_FALLING	(1 << LPTIM_CFGR_CKPOL_SHIFT)
-#define LPTIM_CFGR_CKPOL_BOTH		(2 << LPTIM_CFGR_CKPOL_SHIFT)
-#define LPTIM_CFGR_CKPOL_ENC_1		(0 << LPTIM_CFGR_CKPOL_SHIFT)
-#define LPTIM_CFGR_CKPOL_ENC_2		(1 << LPTIM_CFGR_CKPOL_SHIFT)
-#define LPTIM_CFGR_CKPOL_ENC_3		(2 << LPTIM_CFGR_CKPOL_SHIFT)
-/**@}*/
-
-#define LPTIM_CFGR_CKFLT_SHIFT		3
-#define LPTIM_CFGR_CKFLT_MASK		0x03
-#define LPTIM_CFGR_CKFLT		(3 << LPTIM_CFGR_CKFLT_SHIFT)
-/** @defgroup lptim_cfgr_ckflt LPTIM_CFGR CKFLT Configurable digital filter for external clock
-@{*/
-#define LPTIM_CFGR_CKFLT_2		(1 << LPTIM_CFGR_CKFLT_SHIFT)
-#define LPTIM_CFGR_CKFLT_4		(2 << LPTIM_CFGR_CKFLT_SHIFT)
-#define LPTIM_CFGR_CKFLT_8		(3 << LPTIM_CFGR_CKFLT_SHIFT)
-/**@}*/
-
-#define LPTIM_CFGR_TRGFLT_SHIFT		6
-#define LPTIM_CFGR_TRGFLT_MASK		0x03
-#define LPTIM_CFGR_TRGFLT		(3 << LPTIM_CFGR_TRGFLT_SHIFT)
-/** @defgroup lptim_cfgr_trgflt LPTIM_CFGR TRGFLT Configurable digital filter for trigger
-@{*/
-#define LPTIM_CFGR_TRGFLT_2		(1 << LPTIM_CFGR_TRGFLT_SHIFT)
-#define LPTIM_CFGR_TRGFLT_4		(2 << LPTIM_CFGR_TRGFLT_SHIFT)
-#define LPTIM_CFGR_TRGFLT_8		(3 << LPTIM_CFGR_TRGFLT_SHIFT)
-/**@}*/
-
-#define LPTIM_CFGR_PRESC_SHIFT		9
-#define LPTIM_CFGR_PRESC_MASK		0x07
-#define LPTIM_CFGR_PRESC		(7 << LPTIM_CFGR_PRESC_SHIFT)
-/** @defgroup lptim_cfgr_presc LPTIM_CFGR PRESC Clock prescaler
-@{*/
-#define LPTIM_CFGR_PRESC_1		(0 << LPTIM_CFGR_PRESC_SHIFT)
-#define LPTIM_CFGR_PRESC_2		(1 << LPTIM_CFGR_PRESC_SHIFT)
-#define LPTIM_CFGR_PRESC_4		(2 << LPTIM_CFGR_PRESC_SHIFT)
-#define LPTIM_CFGR_PRESC_8		(3 << LPTIM_CFGR_PRESC_SHIFT)
-#define LPTIM_CFGR_PRESC_16		(4 << LPTIM_CFGR_PRESC_SHIFT)
-#define LPTIM_CFGR_PRESC_32		(5 << LPTIM_CFGR_PRESC_SHIFT)
-#define LPTIM_CFGR_PRESC_64		(6 << LPTIM_CFGR_PRESC_SHIFT)
-#define LPTIM_CFGR_PRESC_128		(7 << LPTIM_CFGR_PRESC_SHIFT)
-/**@}*/
-
-#define LPTIM_CFGR_TRIGSEL_SHIFT	13
-#define LPTIM_CFGR_TRIGSEL_MASK		0x07
-#define LPTIM_CFGR_TRIGSEL		(7 << LPTIM_CFGR_TRIGSEL_SHIFT)
-/** @defgroup lptim_cfgr_trigsel LPTIM_CFGR TRIGSEL Trigger selector
-@{*/
-#define LPTIM_CFGR_TRIGSEL_EXT_TRIG0	(0 << LPTIM_CFGR_TRIGSEL_SHIFT)
-#define LPTIM_CFGR_TRIGSEL_EXT_TRIG1	(1 << LPTIM_CFGR_TRIGSEL_SHIFT)
-#define LPTIM_CFGR_TRIGSEL_EXT_TRIG2	(2 << LPTIM_CFGR_TRIGSEL_SHIFT)
-#define LPTIM_CFGR_TRIGSEL_EXT_TRIG3	(3 << LPTIM_CFGR_TRIGSEL_SHIFT)
-#define LPTIM_CFGR_TRIGSEL_EXT_TRIG4	(4 << LPTIM_CFGR_TRIGSEL_SHIFT)
-/* 5 is reserved */
-#define LPTIM_CFGR_TRIGSEL_EXT_TRIG6	(6 << LPTIM_CFGR_TRIGSEL_SHIFT)
-#define LPTIM_CFGR_TRIGSEL_EXT_TRIG7	(7 << LPTIM_CFGR_TRIGSEL_SHIFT)
-/**@}*/
-
-#define LPTIM_CFGR_TRIGEN_SHIFT		17
-#define LPTIM_CFGR_TRIGSEL_MASK		0x07
-#define LPTIM_CFGR_TRIGEN		(3 << LPTIM_CFGR_TRIGEN_SHIFT)
-/** @defgroup LPTIM_CFGR_TRIGEN LPTIM_CFGR TRIGEN Trigger enable and polarity
-@{*/
-#define LPTIM_CFGR_TRIGEN_SW		(0 << LPTIM_CFGR_TRIGEN_SHIFT)
-#define LPTIM_CFGR_TRIGEN_RISING	(1 << LPTIM_CFGR_TRIGEN_SHIFT)
-#define LPTIM_CFGR_TRIGEN_FALLING	(2 << LPTIM_CFGR_TRIGEN_SHIFT)
-#define LPTIM_CFGR_TRIGEN_BOTH		(3 << LPTIM_CFGR_TRIGEN_SHIFT)
-/**@}*/
-
-/** TIMOUT: Timeout enable **/
-#define LPTIM_CFGR_TIMOUT		(1 << 19)
-
-/** WAVE: Waveform shape **/
-#define LPTIM_CFGR_WAVE			(1 << 20)
-
-/** WAVPOL: Waveform shape polarity **/
-#define LPTIM_CFGR_WAVPOL		(1 << 21)
-
-/** PRELOAD: Register update mode **/
-#define LPTIM_CFGR_PRELOAD		(1 << 22)
-
-/** COUNTMODE: Counter mode enable **/
-#define LPTIM_CFGR_COUNTMODE		(1 << 23)
-
-/** ENC: Encoder mode enable **/
-#define LPTIM_CFGR_ENC			(1 << 24)
-
 /**@}*/
 
-/** @defgroup lptim_cr LPTIM_CR Control Register
-@{*/
-
-/** ENABLE: Counter enable **/
-#define LPTIM_CR_ENABLE			(1 << 0)
-
-/** SNGSTRT: Start in Single Mode **/
-#define LPTIM_CR_SNGSTRT		(1 << 1)
-
-/** CNGSTRT: Start in Continuous Mode **/
-#define LPTIM_CR_CNTSTRT		(1 << 2)
-
-/**@}*/
-
-
 #endif
 
 /**@}*/
diff --git a/include/libopencm3/stm32/lptimer.h b/include/libopencm3/stm32/lptimer.h
new file mode 100644
index 00000000..3dedae59
--- /dev/null
+++ b/include/libopencm3/stm32/lptimer.h
@@ -0,0 +1,30 @@
+/* This provides unification of code over STM32 subfamilies */
+
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2019 Guillaume Revaillot <g.revaillot@gmail.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/cm3/common.h>
+#include <libopencm3/stm32/memorymap.h>
+
+#if defined(STM32L0)
+#       include <libopencm3/stm32/l0/lptimer.h>
+#else
+#       error "stm32 family not defined."
+#endif
+