stm32c0_clock.h

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/*
 * Copyright (c) 2023 Benjamin Björnsson <benjamin.bjornsson@gmail.com>
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32C0_CLOCK_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32C0_CLOCK_H_
 
#include <zephyr/dt-bindings/clock/stm32_common_clocks.h>


#define STM32_CLOCK_BUS_IOP     0x034
#define STM32_CLOCK_BUS_AHB1    0x038
#define STM32_CLOCK_BUS_APB1    0x03c
#define STM32_CLOCK_BUS_APB1_2  0x040
 
#define STM32_PERIPH_BUS_MIN    STM32_CLOCK_BUS_IOP
#define STM32_PERIPH_BUS_MAX    STM32_CLOCK_BUS_APB1_2

/* RM0490, §5.4.21/22 Clock configuration register (RCC_CCIPRx) */

/* defined in stm32_common_clocks.h */
/* Low speed clocks defined in stm32_common_clocks.h
 * STM32_SRC_HSI relates to HSI48 clock mentioned in RM0490 Reference Manual
 * STM32_SRC_HSI48 relates to HSIUSB48 mentioned in RM0490 Reference Manual
 */
#define STM32_SRC_HSI           (STM32_SRC_LSI + 1)
#define STM32_SRC_HSI48         (STM32_SRC_HSI + 1)
#define STM32_SRC_HSE           (STM32_SRC_HSI48 + 1)
#define STM32_SRC_PCLK          (STM32_SRC_HSE + 1)
#define STM32_SRC_TIMPCLK1      (STM32_SRC_PCLK + 1)

#define CCIPR_REG               0x54
#define CCIPR2_REG              0x58

#define CSR1_REG                0x5C

#define CFGR1_REG               0x08

#define USART1_SEL(val)         STM32_DT_CLOCK_SELECT((val), 1, 0, CCIPR_REG)
#define FDCAN_SEL(val)          STM32_DT_CLOCK_SELECT((val), 9, 8, CCIPR_REG)
#define I2C1_SEL(val)           STM32_DT_CLOCK_SELECT((val), 13, 12, CCIPR_REG)
#define I2C2_I2S1_SEL(val)      STM32_DT_CLOCK_SELECT((val), 15, 14, CCIPR_REG)
#define ADC_SEL(val)            STM32_DT_CLOCK_SELECT((val), 31, 30, CCIPR_REG)
#define USB_SEL(val)            STM32_DT_CLOCK_SELECT((val), 12, 12, CCIPR2_REG)
#define RTC_SEL(val)            STM32_DT_CLOCK_SELECT((val), 9, 8, CSR1_REG)

#define MCO2_SEL(val)           STM32_DT_CLOCK_SELECT((val), 19, 16, CFGR1_REG)
#define MCO2_PRE(val)           STM32_DT_CLOCK_SELECT((val), 23, 20, CFGR1_REG)
#define MCO1_SEL(val)           STM32_DT_CLOCK_SELECT((val), 27, 24, CFGR1_REG)
#define MCO1_PRE(val)           STM32_DT_CLOCK_SELECT((val), 31, 28, CFGR1_REG)
 
/* MCO prescaler : division factor */
#define MCO_PRE_DIV_1   0
#define MCO_PRE_DIV_2   1
#define MCO_PRE_DIV_4   2
#define MCO_PRE_DIV_8   3
#define MCO_PRE_DIV_16  4
#define MCO_PRE_DIV_32  5
#define MCO_PRE_DIV_64  6
#define MCO_PRE_DIV_128 7

 
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32C0_CLOCK_H_ */