1 /* 2 * Copyright (c) 2016 Nordic Semiconductor ASA 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #ifndef ZEPHYR_INCLUDE_DRIVERS_CLOCK_CONTROL_NRF_CLOCK_CONTROL_H_ 8 #define ZEPHYR_INCLUDE_DRIVERS_CLOCK_CONTROL_NRF_CLOCK_CONTROL_H_ 9 10 #include <device.h> 11 #include <hal/nrf_clock.h> 12 #include <sys/onoff.h> 13 #include <drivers/clock_control.h> 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 /** @brief Clocks handled by the CLOCK peripheral. 20 * 21 * Enum shall be used as a sys argument in clock_control API. 22 */ 23 enum clock_control_nrf_type { 24 CLOCK_CONTROL_NRF_TYPE_HFCLK, 25 CLOCK_CONTROL_NRF_TYPE_LFCLK, 26 #if NRF_CLOCK_HAS_HFCLK192M 27 CLOCK_CONTROL_NRF_TYPE_HFCLK192M, 28 #endif 29 #if NRF_CLOCK_HAS_HFCLKAUDIO 30 CLOCK_CONTROL_NRF_TYPE_HFCLKAUDIO, 31 #endif 32 CLOCK_CONTROL_NRF_TYPE_COUNT 33 }; 34 35 /* Define can be used with clock control API instead of enum directly to 36 * increase code readability. 37 */ 38 #define CLOCK_CONTROL_NRF_SUBSYS_HF \ 39 ((clock_control_subsys_t)CLOCK_CONTROL_NRF_TYPE_HFCLK) 40 #define CLOCK_CONTROL_NRF_SUBSYS_LF \ 41 ((clock_control_subsys_t)CLOCK_CONTROL_NRF_TYPE_LFCLK) 42 #define CLOCK_CONTROL_NRF_SUBSYS_HF192M \ 43 ((clock_control_subsys_t)CLOCK_CONTROL_NRF_TYPE_HFCLK192M) 44 #define CLOCK_CONTROL_NRF_SUBSYS_HFAUDIO \ 45 ((clock_control_subsys_t)CLOCK_CONTROL_NRF_TYPE_HFCLKAUDIO) 46 47 /** @brief LF clock start modes. */ 48 enum nrf_lfclk_start_mode { 49 CLOCK_CONTROL_NRF_LF_START_NOWAIT, 50 CLOCK_CONTROL_NRF_LF_START_AVAILABLE, 51 CLOCK_CONTROL_NRF_LF_START_STABLE, 52 }; 53 54 /* Define 32KHz clock source */ 55 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC 56 #define CLOCK_CONTROL_NRF_K32SRC NRF_CLOCK_LFCLK_RC 57 #endif 58 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL 59 #define CLOCK_CONTROL_NRF_K32SRC NRF_CLOCK_LFCLK_Xtal 60 #endif 61 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH 62 #define CLOCK_CONTROL_NRF_K32SRC NRF_CLOCK_LFCLK_Synth 63 #endif 64 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_EXT_LOW_SWING 65 #define CLOCK_CONTROL_NRF_K32SRC NRF_CLOCK_LFCLK_Xtal_Low_Swing 66 #endif 67 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_EXT_FULL_SWING 68 #define CLOCK_CONTROL_NRF_K32SRC NRF_CLOCK_LFCLK_Xtal_Full_Swing 69 #endif 70 71 /* Define 32KHz clock accuracy */ 72 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM 73 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 0 74 #endif 75 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_250PPM 76 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 1 77 #endif 78 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_150PPM 79 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 2 80 #endif 81 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_100PPM 82 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 3 83 #endif 84 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_75PPM 85 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 4 86 #endif 87 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_50PPM 88 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 5 89 #endif 90 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_30PPM 91 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 6 92 #endif 93 #ifdef CONFIG_CLOCK_CONTROL_NRF_K32SRC_20PPM 94 #define CLOCK_CONTROL_NRF_K32SRC_ACCURACY 7 95 #endif 96 97 /** @brief Force LF clock calibration. */ 98 void z_nrf_clock_calibration_force_start(void); 99 100 /** @brief Return number of calibrations performed. 101 * 102 * Valid when @ref CONFIG_CLOCK_CONTROL_NRF_CALIBRATION_DEBUG is set. 103 * 104 * @return Number of calibrations or -1 if feature is disabled. 105 */ 106 int z_nrf_clock_calibration_count(void); 107 108 /** @brief Return number of attempts when calibration was skipped. 109 * 110 * Valid when @ref CONFIG_CLOCK_CONTROL_NRF_CALIBRATION_DEBUG is set. 111 * 112 * @return Number of calibrations or -1 if feature is disabled. 113 */ 114 int z_nrf_clock_calibration_skips_count(void); 115 116 /** @brief Get onoff service for given clock subsystem. 117 * 118 * @param sys Subsystem. 119 * 120 * @return Service handler or NULL. 121 */ 122 struct onoff_manager *z_nrf_clock_control_get_onoff(clock_control_subsys_t sys); 123 124 /** @brief Permanently enable low frequency clock. 125 * 126 * Low frequency clock is usually enabled during application lifetime because 127 * of long startup time and low power consumption. Multiple modules can request 128 * it but never release. 129 * 130 * @param start_mode Specify if function should block until clock is available. 131 */ 132 void z_nrf_clock_control_lf_on(enum nrf_lfclk_start_mode start_mode); 133 134 /** @brief Request high frequency clock from Bluetooth Controller. 135 * 136 * Function is optimized for Bluetooth Controller which turns HF clock before 137 * each radio activity and has hard timing requirements but does not require 138 * any confirmation when clock is ready because it assumes that request is 139 * performed long enough before radio activity. Clock is released immediately 140 * after radio activity. 141 * 142 * Function does not perform any validation. It is the caller responsibility to 143 * ensure that every z_nrf_clock_bt_ctlr_hf_request matches 144 * z_nrf_clock_bt_ctlr_hf_release call. 145 */ 146 void z_nrf_clock_bt_ctlr_hf_request(void); 147 148 /** @brief Release high frequency clock from Bluetooth Controller. 149 * 150 * See z_nrf_clock_bt_ctlr_hf_request for details. 151 */ 152 void z_nrf_clock_bt_ctlr_hf_release(void); 153 154 #ifdef __cplusplus 155 } 156 #endif 157 158 #endif /* ZEPHYR_INCLUDE_DRIVERS_CLOCK_CONTROL_NRF_CLOCK_CONTROL_H_ */ 159
