1 use alloc::sync::Arc; 2 use system_error::SystemError; 3 4 use crate::driver::base::kobject::KObject; 5 6 use super::{global_default_rtc, sysfs::RtcGeneralDevice, utils::kobj2rtc_device, RtcTime}; 7 8 /// 根据rtc general device, 读取真实时间 rtc_read_time(general_dev: &Arc<RtcGeneralDevice>) -> Result<RtcTime, SystemError>9pub fn rtc_read_time(general_dev: &Arc<RtcGeneralDevice>) -> Result<RtcTime, SystemError> { 10 let class_ops = general_dev.class_ops().ok_or(SystemError::EINVAL)?; 11 12 let real_dev = general_dev 13 .parent() 14 .and_then(|p| p.upgrade()) 15 .ok_or(SystemError::ENODEV)?; 16 17 let real_dev = kobj2rtc_device(real_dev).ok_or(SystemError::EINVAL)?; 18 19 let time = class_ops.read_time(&real_dev)?; 20 21 if !time.valid() { 22 return Err(SystemError::EINVAL); 23 } 24 25 return Ok(time); 26 } 27 28 /// 从全局默认的rtc时钟那里读取时间 rtc_read_time_default() -> Result<RtcTime, SystemError>29pub fn rtc_read_time_default() -> Result<RtcTime, SystemError> { 30 rtc_read_time(&global_default_rtc().ok_or(SystemError::ENODEV)?) 31 } 32