include/linux/mfd/stm32-lptimer.h

   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_CMPOKCF_ARROKCF     GENMASK(4, 3)
  31
  32 /* STM32_LPTIM_CR - bit fields */
  33 #define STM32_LPTIM_CNTSTRT     BIT(2)
  34 #define STM32_LPTIM_ENABLE      BIT(0)
  35
  36 /* STM32_LPTIM_CFGR - bit fields */
  37 #define STM32_LPTIM_ENC         BIT(24)
  38 #define STM32_LPTIM_COUNTMODE   BIT(23)
  39 #define STM32_LPTIM_WAVPOL      BIT(21)
  40 #define STM32_LPTIM_PRESC       GENMASK(11, 9)
  41 #define STM32_LPTIM_CKPOL       GENMASK(2, 1)
  42
  43 /* STM32_LPTIM_ARR */
  44 #define STM32_LPTIM_MAX_ARR     0xFFFF
  45
  46 /**
  47  * struct stm32_lptimer - STM32 Low-Power Timer data assigned by parent device
  48  * @clk: clock reference for this instance
  49  * @regmap: register map reference for this instance
  50  * @has_encoder: indicates this Low-Power Timer supports encoder mode
  51  */
  52 struct stm32_lptimer {
  53         struct clk *clk;
  54         struct regmap *regmap;
  55         bool has_encoder;
  56 };
  57
  58 #endif