Zephyr Project API 4.2.99
A Scalable Open Source RTOS
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stm32f4_clock.h
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1/*
2 * Copyright (c) 2022 Linaro Limited
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32F4_CLOCK_H_
7#define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32F4_CLOCK_H_
8
10
14#define STM32_CLOCK_BUS_AHB1 0x030
15#define STM32_CLOCK_BUS_AHB2 0x034
16#define STM32_CLOCK_BUS_AHB3 0x038
17#define STM32_CLOCK_BUS_APB1 0x040
18#define STM32_CLOCK_BUS_APB2 0x044
19#define STM32_CLOCK_BUS_APB3 0x0A8
20
21#define STM32_PERIPH_BUS_MIN STM32_CLOCK_BUS_AHB1
22#define STM32_PERIPH_BUS_MAX STM32_CLOCK_BUS_APB3
23
25/* RM0386, 0390, 0402, 0430 ยง Dedicated Clock configuration register (RCC_DCKCFGRx) */
26
28/* defined in stm32_common_clocks.h */
30/* Low speed clocks defined in stm32_common_clocks.h */
31#define STM32_SRC_HSI (STM32_SRC_LSI + 1)
32#define STM32_SRC_HSE (STM32_SRC_HSI + 1)
34#define STM32_SRC_PLL_P (STM32_SRC_HSE + 1)
35#define STM32_SRC_PLL_Q (STM32_SRC_PLL_P + 1)
36#define STM32_SRC_PLL_R (STM32_SRC_PLL_Q + 1)
38#define STM32_SRC_PLLI2S_Q (STM32_SRC_PLL_R + 1)
39#define STM32_SRC_PLLI2S_R (STM32_SRC_PLLI2S_Q + 1)
40/* CLK48MHz sources */
41#define STM32_SRC_CK48 (STM32_SRC_PLLI2S_R + 1)
43#define STM32_SRC_TIMPCLK1 (STM32_SRC_CK48 + 1)
44#define STM32_SRC_TIMPCLK2 (STM32_SRC_TIMPCLK1 + 1)
45
46/* I2S_CKIN not supported yet */
47/* #define STM32_SRC_I2S_CKIN TBD */
48
50#define CFGR_REG 0x08
52#define BDCR_REG 0x70
53
56#define I2S_SEL(val) STM32_DT_CLOCK_SELECT((val), 1, 23, CFGR_REG)
57#define MCO1_SEL(val) STM32_DT_CLOCK_SELECT((val), 0x3, 21, CFGR_REG)
58#define MCO1_PRE(val) STM32_DT_CLOCK_SELECT((val), 0x7, 24, CFGR_REG)
59#define MCO2_SEL(val) STM32_DT_CLOCK_SELECT((val), 0x3, 30, CFGR_REG)
60#define MCO2_PRE(val) STM32_DT_CLOCK_SELECT((val), 0x7, 27, CFGR_REG)
62#define RTC_SEL(val) STM32_DT_CLOCK_SELECT((val), 3, 8, BDCR_REG)
63
64/* MCO prescaler : division factor */
65#define MCO_PRE_DIV_1 0
66#define MCO_PRE_DIV_2 4
67#define MCO_PRE_DIV_3 5
68#define MCO_PRE_DIV_4 6
69#define MCO_PRE_DIV_5 7
70
71#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32F4_CLOCK_H_ */