drivers_at86rf215 : Expose to Kconfig

Expose Configurations to Kconfig

Co-Authored-By: benpicco <benpicco@googlemail.com>
Co-Authored-By: Leandro Lanzieri <leandro.lanzieri@haw-hamburg.de>

drivers/Kconfig.net

@@ -5,6 +5,7 @@
 # directory for more details.
 
 menu "Network Device Drivers"
+rsource "at86rf215/Kconfig"
 rsource "cc110x/Kconfig"
 rsource "mrf24j40/Kconfig"
 source "$(RIOTCPU)/nrf52/radio/nrf802154/Kconfig"

drivers/at86rf215/Kconfig

@@ -0,0 +1,41 @@
+# Copyright (c) 2020 Freie Universitaet Berlin
+#
+# 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 KCONFIG_MODULE_AT86RF215
+    bool "Configure AT86RF215 driver"
+    depends on MODULE_AT86RF215
+    help
+        Configure the AT86RF215 driver using Kconfig.
+
+if KCONFIG_MODULE_AT86RF215
+
+config AT86RF215_USE_CLOCK_OUTPUT
+    bool "Enable clock output"
+    help
+        Enable this to enable the clock output pin of the AT86RF215 chip.
+        This way it can be used as a clock source in place of a separate crystal.
+        You also have to enable this if you want to measure the clock frequency
+        for trimming. After proper trim value is applied this may be disabled
+        if not used otherwise.
+        By Default it is turned off to save energy.
+
+config AT86RF215_TRIM_VAL_EN
+    bool "Enable crystal oscillator trimming"
+    help
+        Enable crystal oscillator trimming.
+
+config AT86RF215_TRIM_VAL
+    int "Trim value for the crystal oscillator"
+    range 0 15
+    default 0
+    depends on AT86RF215_TRIM_VAL_EN
+    help
+        Each increment adds 300nF capacitance between the crystal oscillator pins
+        TCXO and XTAL2.Tweak the value until the measured clock output matches
+        26 MHz the best.
+        For more information Refer Table 6-25 TRIM in Datasheet
+
+endif # KCONFIG_MODULE_AT86RF215