stm32f4_clock.h

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/*
 * Copyright (c) 2022 Linaro Limited
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32F4_CLOCK_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32F4_CLOCK_H_
 
#include "stm32_common_clocks.h"
 
#define STM32_CLOCK_BUS_AHB1 0x030
#define STM32_CLOCK_BUS_AHB2 0x034
#define STM32_CLOCK_BUS_AHB3 0x038
#define STM32_CLOCK_BUS_APB1 0x040
#define STM32_CLOCK_BUS_APB2 0x044
#define STM32_CLOCK_BUS_APB3 0x0A8
 
#define STM32_PERIPH_BUS_MIN STM32_CLOCK_BUS_AHB1
#define STM32_PERIPH_BUS_MAX STM32_CLOCK_BUS_APB3
 
/* RM0386, 0390, 0402, 0430 § Dedicated Clock configuration register (RCC_DCKCFGRx) */
 
/* defined in stm32_common_clocks.h */
/* Low speed clocks defined in stm32_common_clocks.h */
#define STM32_SRC_HSI           (STM32_SRC_LSI + 1)
#define STM32_SRC_HSE           (STM32_SRC_HSI + 1)
#define STM32_SRC_PLL_P         (STM32_SRC_HSE + 1)
#define STM32_SRC_PLL_Q         (STM32_SRC_PLL_P + 1)
#define STM32_SRC_PLL_R         (STM32_SRC_PLL_Q + 1)
#define STM32_SRC_PLLI2S_Q      (STM32_SRC_PLL_R + 1)
#define STM32_SRC_PLLI2S_R      (STM32_SRC_PLLI2S_Q + 1)
/* CLK48MHz sources */
#define STM32_SRC_CK48          (STM32_SRC_PLLI2S_R + 1)
 
/* I2S_CKIN not supported yet */
/* #define STM32_SRC_I2S_CKIN   TBD */
 
#define STM32_CLOCK_REG_MASK    0xFFU
#define STM32_CLOCK_REG_SHIFT   0U
#define STM32_CLOCK_SHIFT_MASK  0x1FU
#define STM32_CLOCK_SHIFT_SHIFT 8U
#define STM32_CLOCK_MASK_MASK   0x7U
#define STM32_CLOCK_MASK_SHIFT  13U
#define STM32_CLOCK_VAL_MASK    0x7U
#define STM32_CLOCK_VAL_SHIFT   16U
 
#define STM32_DOMAIN_CLOCK(val, mask, shift, reg)                                                  \
        ((((reg) & STM32_CLOCK_REG_MASK) << STM32_CLOCK_REG_SHIFT) |                               \
         (((shift) & STM32_CLOCK_SHIFT_MASK) << STM32_CLOCK_SHIFT_SHIFT) |                         \
         (((mask) & STM32_CLOCK_MASK_MASK) << STM32_CLOCK_MASK_SHIFT) |                            \
         (((val) & STM32_CLOCK_VAL_MASK) << STM32_CLOCK_VAL_SHIFT))
 
#define CFGR_REG 0x08
#define BDCR_REG 0x70
 
#define I2S_SEL(val)  STM32_DOMAIN_CLOCK(val, 1, 23, CFGR_REG)
#define MCO1_SEL(val) STM32_MCO_CFGR(val, 0x3, 21, CFGR_REG)
#define MCO1_PRE(val) STM32_MCO_CFGR(val, 0x7, 24, CFGR_REG)
#define MCO2_SEL(val) STM32_MCO_CFGR(val, 0x3, 30, CFGR_REG)
#define MCO2_PRE(val) STM32_MCO_CFGR(val, 0x7, 27, CFGR_REG)
#define RTC_SEL(val)  STM32_DOMAIN_CLOCK(val, 3, 8, BDCR_REG)
 
/* MCO prescaler : division factor */
#define MCO_PRE_DIV_1 0
#define MCO_PRE_DIV_2 4
#define MCO_PRE_DIV_3 5
#define MCO_PRE_DIV_4 6
#define MCO_PRE_DIV_5 7
 
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32F4_CLOCK_H_ */