sys/ztimer: add modules to Kconfig

sys/Kconfig

@@ -32,6 +32,7 @@ rsource "test_utils/Kconfig"
 rsource "tsrb/Kconfig"
 rsource "usb/Kconfig"
 rsource "xtimer/Kconfig"
+rsource "ztimer/Kconfig"
 
 config MODULE_SYS
     bool

sys/ztimer/Kconfig

@@ -0,0 +1,146 @@
+# Copyright (c) 2021 HAW Hamburg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+
+menuconfig MODULE_ZTIMER
+    bool "ztimer - High level timer abstraction layer"
+    depends on TEST_KCONFIG
+    select MODULE_ZTIMER_CORE
+    select MODULE_ZTIMER_CONVERT_FRAC
+    select MODULE_ZTIMER_CONVERT_SHIFT
+    select MODULE_ZTIMER_EXTEND
+
+if MODULE_ZTIMER
+
+menu "Backends"
+
+config MODULE_ZTIMER_PERIPH_RTC
+    bool "RTC peripheral"
+    depends on HAS_PERIPH_RTC
+    select MODULE_PERIPH_RTC
+
+config MODULE_ZTIMER_PERIPH_RTT
+    bool "RTT peripheral"
+    depends on HAS_PERIPH_RTT
+    select MODULE_PERIPH_RTT
+
+config MODULE_ZTIMER_PERIPH_TIMER
+    bool "Timer peripheral"
+    depends on HAS_PERIPH_TIMER
+    select MODULE_PERIPH_TIMER
+
+endmenu # Backends
+
+menu "Clocks"
+
+config MODULE_ZTIMER_USEC
+    bool "Microseconds"
+    depends on MODULE_ZTIMER_PERIPH_TIMER
+
+config MODULE_ZTIMER_MSEC
+    bool "Milliseconds"
+    depends on MODULE_ZTIMER_PERIPH_TIMER || MODULE_ZTIMER_PERIPH_RTT
+
+endmenu # Clocks
+
+
+menu "Frequency conversion"
+
+config MODULE_ZTIMER_CONVERT_MULDIV64
+    bool "64-bits arithmetic conversion"
+    select MODULE_ZTIMER_CONVERT
+    help
+        muldiv64 is very precise, but the overhead is the highest. On MCUs
+        without hardware division this might not be a good choice.
+
+config MODULE_ZTIMER_CONVERT_FRAC
+    bool "Fractional conversion"
+    select MODULE_ZTIMER_CONVERT
+    select MODULE_FRAC
+    help
+        Frac can be used for arbitrary frequency conversions, but trades in
+        precision to gain speed. In cases where shift conversion cannot be used,
+        this is likely the best trade off.
+
+config MODULE_ZTIMER_CONVERT_SHIFT
+    bool "Shift conversion"
+    select MODULE_ZTIMER_CONVERT
+    help
+        Shift conversion is both fast and super precise, but cannot work for
+        arbitrary frequencies. It's kind of a software prescaler for the
+        underlying clock. So if the hardware clock frequency and the target
+        clock frequency differ by a factor that is a power of two, this is the
+        best choice - otherwise it is simply not usable.
+
+config MODULE_ZTIMER_CONVERT
+    bool
+
+endmenu # Frequency conversion
+
+
+menu "xtimer and evtimer compatibility"
+
+choice
+    bool "xtimer compatibility"
+    optional
+    depends on MODULE_ZTIMER_USEC
+
+config MODULE_XTIMER_ON_ZTIMER
+    bool "ztimer_usec as timer backend for xtimer"
+
+config MODULE_ZTIMER_XTIMER_COMPAT
+    bool "map xtimer calls to ztimer"
+    select MODULE_DIV
+    help
+        This is a wrapper of xtimer API on ztimer_usec and is currently
+        incomplete. Unless doing testing, use xtimer on ztimer.
+
+endchoice
+
+comment "The ztimer xtimer compatibility module is incomplete, consider using MODULE_XTIMER_ON_ZTIMER instead."
+    depends on MODULE_ZTIMER_XTIMER_COMPAT
+
+config MODULE_EVTIMER_ON_ZTIMER
+    bool "Use ztimer_msec as timer backend for evtimer"
+    depends on MODULE_ZTIMER_MSEC
+    select MODULE_ZTIMER_NOW64
+
+endmenu # xtimer compatibility
+
+
+# TODO: only use MODULE_ZTIMER_AUTO_INIT, for now we try to get the same modules
+# as the Makefile dependency resolution. See sys/ztimer/Makefile.dep for more
+# info on why two modules are used.
+config MODULE_AUTO_INIT_ZTIMER
+    bool "Auto initialize ztimer"
+    depends on MODULE_AUTO_INIT
+    select MODULE_ZTIMER_AUTO_INIT
+    default y
+
+config MODULE_ZTIMER_NOW64
+    bool "Use a 64-bits result for ztimer_now()"
+
+config MODULE_ZTIMER_OVERHEAD
+    bool "Overhead measurement functionalities"
+
+config MODULE_ZTIMER_MOCK
+    bool "Mock backend (for testing only)"
+    help
+        This ztimer module implements a virtual clock that can be used for
+        unittests. It can be manually adjusted to different timestamps and
+        manually fired to simulate different scenarios and test the ztimer
+        implementation using this as a backing timer.
+
+config MODULE_ZTIMER_AUTO_INIT
+    bool
+
+config MODULE_ZTIMER_CORE
+    bool
+
+config MODULE_ZTIMER_EXTEND
+    bool
+
+endif # MODULE_ZTIMER