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