1 /* 2 * Copyright (c) 2024 STMicroelectronics 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 #ifndef ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32U0_CLOCK_H_ 7 #define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32U0_CLOCK_H_ 8 9 #include "stm32_common_clocks.h" 10 11 /** Bus gatting clocks */ 12 #define STM32_CLOCK_BUS_AHB1 0x48 13 #define STM32_CLOCK_BUS_IOP 0x4C 14 #define STM32_CLOCK_BUS_APB1 0x58 15 #define STM32_CLOCK_BUS_APB1_2 0x60 16 17 #define STM32_PERIPH_BUS_MIN STM32_CLOCK_BUS_AHB1 18 #define STM32_PERIPH_BUS_MAX STM32_CLOCK_BUS_APB1_2 19 20 /** Domain clocks */ 21 /* RM0503, 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 #define STM32_SRC_HSI (STM32_SRC_LSI + 1) 29 #define STM32_SRC_HSI48 (STM32_SRC_HSI + 1) 30 #define STM32_SRC_MSI (STM32_SRC_HSI48 + 1) 31 #define STM32_SRC_HSE (STM32_SRC_MSI + 1) 32 /** Peripheral bus clock */ 33 #define STM32_SRC_PCLK (STM32_SRC_HSE + 1) 34 /** PLL clock outputs */ 35 #define STM32_SRC_PLL_P (STM32_SRC_PCLK + 1) 36 #define STM32_SRC_PLL_Q (STM32_SRC_PLL_P + 1) 37 #define STM32_SRC_PLL_R (STM32_SRC_PLL_Q + 1) 38 39 #define STM32_CLOCK_REG_MASK 0xFFU 40 #define STM32_CLOCK_REG_SHIFT 0U 41 #define STM32_CLOCK_SHIFT_MASK 0x1FU 42 #define STM32_CLOCK_SHIFT_SHIFT 8U 43 #define STM32_CLOCK_MASK_MASK 0x7U 44 #define STM32_CLOCK_MASK_SHIFT 13U 45 #define STM32_CLOCK_VAL_MASK 0x7U 46 #define STM32_CLOCK_VAL_SHIFT 16U 47 48 /** 49 * @brief STM32 clock configuration bit field. 50 * 51 * - reg (1/2/3) [ 0 : 7 ] 52 * - shift (0..31) [ 8 : 12 ] 53 * - mask (0x1, 0x3, 0x7) [ 13 : 15 ] 54 * - val (0..7) [ 16 : 18 ] 55 * 56 * @param reg RCC_CCIPRx register offset 57 * @param shift Position within RCC_CCIPRx. 58 * @param mask Mask for the RCC_CCIPRx field. 59 * @param val Clock value (0, 1, ... 7). 60 */ 61 #define STM32_DOMAIN_CLOCK(val, mask, shift, reg) \ 62 ((((reg) & STM32_CLOCK_REG_MASK) << STM32_CLOCK_REG_SHIFT) | \ 63 (((shift) & STM32_CLOCK_SHIFT_MASK) << STM32_CLOCK_SHIFT_SHIFT) | \ 64 (((mask) & STM32_CLOCK_MASK_MASK) << STM32_CLOCK_MASK_SHIFT) | \ 65 (((val) & STM32_CLOCK_VAL_MASK) << STM32_CLOCK_VAL_SHIFT)) 66 67 /** @brief RCC_CCIPR register offset */ 68 #define CCIPR_REG 0x88 69 70 /** @brief RCC_BDCR register offset */ 71 #define BDCR_REG 0x90 72 73 /** @brief Device domain clocks selection helpers */ 74 /** CCIPR devices */ 75 #define USART1_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 0, CCIPR_REG) 76 #define USART2_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 2, CCIPR_REG) 77 #define LPUART3_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 6, CCIPR_REG) 78 #define LPUART2_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 8, CCIPR_REG) 79 #define LPUART1_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 10, CCIPR_REG) 80 #define I2C1_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 12, CCIPR_REG) 81 #define I2C3_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 16, CCIPR_REG) 82 #define LPTIM1_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 18, CCIPR_REG) 83 #define LPTIM2_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 20, CCIPR_REG) 84 #define LPTIM3_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 22, CCIPR_REG) 85 #define TIM1_SEL(val) STM32_DOMAIN_CLOCK(val, 1, 24, CCIPR_REG) 86 #define TIM15_SEL(val) STM32_DOMAIN_CLOCK(val, 1, 25, CCIPR_REG) 87 #define CLK48_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 26, CCIPR_REG) 88 #define ADC_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 28, CCIPR_REG) 89 /** BDCR devices */ 90 #define RTC_SEL(val) STM32_DOMAIN_CLOCK(val, 3, 8, BDCR_REG) 91 92 #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32U0_CLOCK_H_ */ 93
