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

source code of linux/include/linux/mfd/stm32-lptimer.h