From 299655e3be68212bd2317cce9c1d8f11bb6ffbf7 Mon Sep 17 00:00:00 2001
From: Ivan Grokhotkov <ivan@espressif.com>
Date: Thu, 3 Nov 2016 14:49:05 +0800
Subject: [PATCH] esp32: add choice for RTC clock source

For now only one option is supported: internal RC oscillator
---
 components/esp32/Kconfig | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/components/esp32/Kconfig b/components/esp32/Kconfig
index 65cac4ee9f..1f04cf4bb7 100644
--- a/components/esp32/Kconfig
+++ b/components/esp32/Kconfig
@@ -349,5 +349,19 @@ config ESP32_TIME_SYSCALL_USE_NONE
     bool "None"
 endchoice
 
+choice ESP32_RTC_CLOCK_SOURCE
+	prompt "RTC clock source"
+	default ESP32_RTC_CLOCK_SOURCE_INTERNAL_RC
+	help
+		Choose which clock is used as RTC clock source.
+		The only available option for now is to use internal
+		150kHz RC oscillator.
+
+config ESP32_RTC_CLOCK_SOURCE_INTERNAL_RC
+	bool "Internal RC"
+config ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL
+	bool "External 32kHz crystal"
+	depends on DOCUMENTATION_FOR_RTC_CNTL
+endchoice
 
 endmenu