include/linux/mfd/stm32-lptimer.h

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