rpi3: enable jtag gpio option

Enable jtag gpio option at 1st bootloader level. The option
enables jtag gpio as alt4 mode as like following:
 GPIO22 - PIN13 - TRST
 GPIO23 - PIN16 - RTCK
 GPIO24 - PIN18 - TDO
 GPIO25 - PIN22 - TCK
 GPIO26 - PIN37 - TDI
 GPIO27 - PIN07 - TMS

This is requested for debugging secure world with jtag.

Change-Id: I0e25dd9ecf95fa003e56eb73eae5a668a1f6e3ba
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>

diff --git a/rpi3/boot/config.txt b/rpi3/boot/config.txt
index 32c8f6a..84c7b90 100644 (file)
--- a/rpi3/boot/config.txt
+++ b/rpi3/boot/config.txt
@@ -74,3 +74,6 @@ kernel_old=1
 
 # Skip filling ATAGS
 disable_commandline_tags=1
+
+# enable JTAG flag
+enable_jtag_gpio=1