[jira] [Created] (MYNEWT-790) syscfg - Allow a package to override its own setting

["Christopher Collins (JIRA)" <ji...@apache.org>]

Christopher Collins created MYNEWT-790:
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             Summary: syscfg - Allow a package to override its own setting 
                 Key: MYNEWT-790
                 URL: https://issues.apache.org/jira/browse/MYNEWT-790
             Project: Mynewt
          Issue Type: Bug
      Security Level: Public (Viewable by anyone)
          Components: Newt
            Reporter: Christopher Collins
            Assignee: Christopher Collins
             Fix For: v1_1_0_rel


(Pull request: https://github.com/apache/incubator-mynewt-newt/pull/74)

PKG-A can only override a setting defined by PKG-B if PKG-A has a greater priority than PKG-B. If PKG-A's priority is less than or equal to PKG-B's, the override attempt is rejected and reported as a priority violation.

This commit relaxes that rule slightly: a package can override settings that it itself defines.

This behavior is needed for making a setting's default value conditional on another setting. For example:

{noformat}
    syscfg.defs:
        TIMER_0:
            description: 'NRF52 Timer 0'
            value:  1
        TIMER_3:
            description: 'NRF52 Timer 3'
            value:  0

    # Use timer 3 instead of timer 0 if target wants to use the low
    # power clock.
    syscfg.vals.BLE_LP_CLOCK:
        TIMER_0: 0
        TIMER_1: 1
{noformat}



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