RTC driver recently doing, RTC driver need to access the CLK and configuration register, but the CLK register already in CLK drive ioremap once, the RTC driver how to get to the CLK register resources for operation??

CodePudding user response:

Preferably in CLK drive EXPORT functions, you in the RTC driver indirectly by means of the function call operation

CodePudding user response:

Operating systems have done isolation, generally need to pass the kernel function calls visit

CodePudding user response:

Generally have open interface API can be invoked, a public function