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_
 
#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) */
 
#define STM32_SRC_PLL_P         0x001
#define STM32_SRC_PLL_Q         0x002
#define STM32_SRC_PLL_R         0x003
#define STM32_SRC_LSE           0x004
#define STM32_SRC_LSI           0x005
#define STM32_SRC_SYSCLK        0x006
#define STM32_SRC_PLLI2S_R      0x007
/* I2S_CKIN not supported yet */
/* #define STM32_SRC_I2S_CKIN   0x008 */
 
 
#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_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_CLOCK(val, 1, 23, CFGR_REG)
#define RTC_SEL(val)            STM32_CLOCK(val, 3, 8, BDCR_REG)
 
#define NO_SEL                  0xFF
 
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32F4_CLOCK_H_ */