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 */
62 struct stm32_lptimer {
63 struct clk *clk;
64 struct regmap *regmap;
65 bool has_encoder;
66 };
67
68 #endif
69
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