stm32_common_clocks.h

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/*
 * Copyright (c) 2023 STMicroelectronics
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32_COMMON_CLOCKS_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32_COMMON_CLOCKS_H_

#define STM32_SRC_SYSCLK        0x001
#define STM32_SRC_LSE           0x002
#define STM32_SRC_LSI           0x003

#define NO_SEL                  0xFF

#define STM32_CLOCK_DIV_SHIFT   12

#define STM32_CLOCK_DIV(div)    (((div) - 1) << STM32_CLOCK_DIV_SHIFT)

#define STM32_DT_CLKSEL_REG_MASK        0xFFFFU
#define STM32_DT_CLKSEL_REG_SHIFT       0U
#define STM32_DT_CLKSEL_SHIFT_MASK      0x1FU
#define STM32_DT_CLKSEL_SHIFT_SHIFT     16U
#define STM32_DT_CLKSEL_WIDTH_MASK      0x3U
#define STM32_DT_CLKSEL_WIDTH_SHIFT     21U
#define STM32_DT_CLKSEL_VAL_MASK        0xFFU
#define STM32_DT_CLKSEL_VAL_SHIFT       24U

#define STM32_DT_CLOCK_SELECT(val, msb, lsb, reg)                                               \
        ((((reg) & STM32_DT_CLKSEL_REG_MASK) << STM32_DT_CLKSEL_REG_SHIFT) |                    \
         (((lsb) & STM32_DT_CLKSEL_SHIFT_MASK) << STM32_DT_CLKSEL_SHIFT_SHIFT) |                \
         ((((msb) - (lsb)) & STM32_DT_CLKSEL_WIDTH_MASK) << STM32_DT_CLKSEL_WIDTH_SHIFT) |      \
         (((val) & STM32_DT_CLKSEL_VAL_MASK) << STM32_DT_CLKSEL_VAL_SHIFT))

#define STM32_CLOCK(bus, bit) (STM32_CLOCK_BUS_##bus) (1 << bit)
 
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_CLOCK_STM32_COMMON_CLOCKS_H_ */