drivers/am335xgpio: Add AM335x driver for bitbang support on BeagleBones

[fw/openocd] / tcl / interface / beaglebone-jtag-native.cfg

diff --git a/tcl/interface/beaglebone-jtag-native.cfg b/tcl/interface/beaglebone-jtag-native.cfg
new file mode 100644 (file)
index 0000000..cd32ca4
--- /dev/null
+++ b/tcl/interface/beaglebone-jtag-native.cfg
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# BeagleBone native GPIO interface for JTAG
+#
+# This is best used with a fast buffer but it is also suitable for a direct
+# connection if the target voltage matches the host's IO voltage (typically
+# 3.3V) and the cable is short.
+#
+# DO NOT APPLY VOLTAGE TO THE GPIO PINS UNTIL SYS_RESETN IS HIGH.
+#
+# Do not forget the GND connection.
+
+adapter driver am335xgpio
+
+# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
+# These depend on the system clock, calibrated for stock 1 GHz BeagleBoneBlack
+# am335xgpio speed SPEED_COEFF SPEED_OFFSET
+am335xgpio speed_coeffs 600000 575
+
+am335xgpio tdo_num 20
+am335xgpio tdi_num 60
+am335xgpio tms_num 4
+am335xgpio tck_num 2
+
+am335xgpio led_num 51
+am335xgpio led_on_state on
+
+am335xgpio srst_num 65
+reset_config srst_only srst_push_pull