Line data    Source code

       1           0 : /*
       2             :  * Copyright (c) 2022 Linaro Limited
       3             :  *
       4             :  * SPDX-License-Identifier: Apache-2.0
       5             :  */
       6             : #ifndef ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32L0_CLOCK_H_
       7             : #define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32L0_CLOCK_H_
       8             : 
       9             : #include "stm32_common_clocks.h"
      10             : 
      11             : /** Bus gatting clocks */
      12           1 : #define STM32_CLOCK_BUS_IOP     0x02c
      13           0 : #define STM32_CLOCK_BUS_AHB1    0x030
      14           0 : #define STM32_CLOCK_BUS_APB2    0x034
      15           0 : #define STM32_CLOCK_BUS_APB1    0x038
      16             : 
      17           0 : #define STM32_PERIPH_BUS_MIN    STM32_CLOCK_BUS_IOP
      18           0 : #define STM32_PERIPH_BUS_MAX    STM32_CLOCK_BUS_APB1
      19             : 
      20             : /** Domain clocks */
      21             : /* RM0367, §7.3.20 Clock configuration register (RCC_CCIPR) */
      22             : 
      23             : /** System clock */
      24             : /* defined in stm32_common_clocks.h */
      25             : 
      26             : /** Fixed clocks  */
      27             : /* Low speed clocks defined in stm32_common_clocks.h */
      28           1 : #define STM32_SRC_HSE           (STM32_SRC_LSI + 1)
      29           0 : #define STM32_SRC_HSI           (STM32_SRC_HSE + 1)
      30           0 : #define STM32_SRC_HSI48         (STM32_SRC_HSI + 1)
      31             : /** Bus clock */
      32           1 : #define STM32_SRC_PCLK          (STM32_SRC_HSI48 + 1)
      33             : 
      34           0 : #define STM32_CLOCK_REG_MASK    0xFFU
      35           0 : #define STM32_CLOCK_REG_SHIFT   0U
      36           0 : #define STM32_CLOCK_SHIFT_MASK  0x1FU
      37           0 : #define STM32_CLOCK_SHIFT_SHIFT 8U
      38           0 : #define STM32_CLOCK_MASK_MASK   0x7U
      39           0 : #define STM32_CLOCK_MASK_SHIFT  13U
      40           0 : #define STM32_CLOCK_VAL_MASK    0x7U
      41           0 : #define STM32_CLOCK_VAL_SHIFT   16U
      42             : 
      43             : /**
      44             :  * @brief STM32 clock configuration bit field.
      45             :  *
      46             :  * - reg   (1/2/3)         [ 0 : 7 ]
      47             :  * - shift (0..31)         [ 8 : 12 ]
      48             :  * - mask  (0x1, 0x3, 0x7) [ 13 : 15 ]
      49             :  * - val   (0..7)          [ 16 : 18 ]
      50             :  *
      51             :  * @param reg RCC_CCIPRx register offset
      52             :  * @param shift Position within RCC_CCIPRx.
      53             :  * @param mask Mask for the RCC_CCIPRx field.
      54             :  * @param val Clock value (0, 1, ... 7).
      55             :  */
      56           1 : #define STM32_DOMAIN_CLOCK(val, mask, shift, reg)                                       \
      57             :         ((((reg) & STM32_CLOCK_REG_MASK) << STM32_CLOCK_REG_SHIFT) |          \
      58             :          (((shift) & STM32_CLOCK_SHIFT_MASK) << STM32_CLOCK_SHIFT_SHIFT) |    \
      59             :          (((mask) & STM32_CLOCK_MASK_MASK) << STM32_CLOCK_MASK_SHIFT) |               \
      60             :          (((val) & STM32_CLOCK_VAL_MASK) << STM32_CLOCK_VAL_SHIFT))
      61             : 
      62             : /** @brief RCC_CCIPR register offset */
      63           1 : #define CCIPR_REG               0x4C
      64             : 
      65             : /** @brief RCC_CSR register offset */
      66           1 : #define CSR_REG         0x50
      67             : 
      68             : /** @brief Device domain clocks selection helpers */
      69             : /** CCIPR devices */
      70           1 : #define USART1_SEL(val)         STM32_DOMAIN_CLOCK(val, 3, 0, CCIPR_REG)
      71           0 : #define USART2_SEL(val)         STM32_DOMAIN_CLOCK(val, 3, 2, CCIPR_REG)
      72           0 : #define LPUART1_SEL(val)        STM32_DOMAIN_CLOCK(val, 3, 10, CCIPR_REG)
      73           0 : #define I2C1_SEL(val)           STM32_DOMAIN_CLOCK(val, 3, 12, CCIPR_REG)
      74           0 : #define I2C3_SEL(val)           STM32_DOMAIN_CLOCK(val, 3, 16, CCIPR_REG)
      75           0 : #define LPTIM1_SEL(val)         STM32_DOMAIN_CLOCK(val, 3, 18, CCIPR_REG)
      76           0 : #define HSI48_SEL(val)          STM32_DOMAIN_CLOCK(val, 1, 26, CCIPR_REG)
      77             : /** CSR devices */
      78           1 : #define RTC_SEL(val)            STM32_DOMAIN_CLOCK(val, 3, 16, CSR_REG)
      79             : 
      80             : #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32L0_CLOCK_H_ */