From 61eee6d4fcba4c61ba74c92ca0550de2ce8832dc Mon Sep 17 00:00:00 2001
From: Peter Bigot <peter.bigot@nordicsemi.no>
Date: Tue, 20 Oct 2020 10:20:50 -0500
Subject: [PATCH] boards: nrf52840dk_nrf52840: document suppported QSPI opcodes

The SPI NOR device on this board supports fastread, 2READ, DREAD,
4READ, and QREAD for read opcodes, but only PP and QPP for write
opcodes.  Provide a clue to people trying to use 2READ with 2PP: it
won't work.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
---
 boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts b/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts
index eb724721fbc..5ccd2334f31 100644
--- a/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts
+++ b/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts
@@ -210,7 +210,9 @@ arduino_i2c: &i2c0 {
 	mx25r64: mx25r6435f@0 {
 		compatible = "nordic,qspi-nor";
 		reg = <0>;
+		/* MX24R64 supports only pp and pp4io */
 		writeoc = "pp4io";
+		/* MX24R64 supports all readoc options */
 		readoc = "read4io";
 		sck-frequency = <8000000>;
 		label = "MX25R64";