1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * STM32 Low-Power Timer parent driver.
4 * Copyright (C) STMicroelectronics 2017
5 * Author: Fabrice Gasnier <fabrice.gasnier@st.com>
6 * Inspired by Benjamin Gaignard's stm32-timers driver
7 */
8
9#ifndef _LINUX_STM32_LPTIMER_H_
10#define _LINUX_STM32_LPTIMER_H_
11
12#include <linux/clk.h>
13#include <linux/regmap.h>
14
15#define STM32_LPTIM_ISR		0x00	/* Interrupt and Status Reg  */
16#define STM32_LPTIM_ICR		0x04	/* Interrupt Clear Reg       */
17#define STM32_LPTIM_IER		0x08	/* Interrupt Enable Reg      */
18#define STM32_LPTIM_CFGR	0x0C	/* Configuration Reg         */
19#define STM32_LPTIM_CR		0x10	/* Control Reg               */
20#define STM32_LPTIM_CMP		0x14	/* Compare Reg               */
21#define STM32_LPTIM_ARR		0x18	/* Autoreload Reg            */
22#define STM32_LPTIM_CNT		0x1C	/* Counter Reg               */
23
24/* STM32_LPTIM_ISR - bit fields */
25#define STM32_LPTIM_CMPOK_ARROK		GENMASK(4, 3)
26#define STM32_LPTIM_ARROK		BIT(4)
27#define STM32_LPTIM_CMPOK		BIT(3)
28
29/* STM32_LPTIM_ICR - bit fields */
30#define STM32_LPTIM_ARRMCF		BIT(1)
31#define STM32_LPTIM_CMPOKCF_ARROKCF	GENMASK(4, 3)
32
33/* STM32_LPTIM_IER - bit flieds */
34#define STM32_LPTIM_ARRMIE	BIT(1)
35
36/* STM32_LPTIM_CR - bit fields */
37#define STM32_LPTIM_CNTSTRT	BIT(2)
38#define STM32_LPTIM_SNGSTRT	BIT(1)
39#define STM32_LPTIM_ENABLE	BIT(0)
40
41/* STM32_LPTIM_CFGR - bit fields */
42#define STM32_LPTIM_ENC		BIT(24)
43#define STM32_LPTIM_COUNTMODE	BIT(23)
44#define STM32_LPTIM_WAVPOL	BIT(21)
45#define STM32_LPTIM_PRESC	GENMASK(11, 9)
46#define STM32_LPTIM_CKPOL	GENMASK(2, 1)
47
48/* STM32_LPTIM_CKPOL */
49#define STM32_LPTIM_CKPOL_RISING_EDGE	0
50#define STM32_LPTIM_CKPOL_FALLING_EDGE	1
51#define STM32_LPTIM_CKPOL_BOTH_EDGES	2
52
53/* STM32_LPTIM_ARR */
54#define STM32_LPTIM_MAX_ARR	0xFFFF
55
56/**
57 * struct stm32_lptimer - STM32 Low-Power Timer data assigned by parent device
58 * @clk: clock reference for this instance
59 * @regmap: register map reference for this instance
60 * @has_encoder: indicates this Low-Power Timer supports encoder mode
61 */
62struct stm32_lptimer {
63	struct clk *clk;
64	struct regmap *regmap;
65	bool has_encoder;
66};
67
68#endif
69