1 files changed, 28 insertions, 0 deletions
diff --git a/tcl/interface/raspberrypi5-gpiod.cfg b/tcl/interface/raspberrypi5-gpiod.cfg
new file mode 100644
index 0000000..9624ad5
--- /dev/null
+++ b/tcl/interface/raspberrypi5-gpiod.cfg
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# Config for Raspberry Pi 5 used as a bitbang adapter.
+# https://www.raspberrypi.com/documentation/computers/raspberry-pi.html
+
+# Raspberry Pi 5 is not compatible with bcm2835gpio native GPIO driver.
+# The linuxgpiod driver without configurable adapter speed runs at approximately
+# 800 kHz (SWD writes) and 360 kHz (SWD reads)
+
+adapter driver linuxgpiod
+
+proc read_file { name } {
+	if {[catch {open $name r} fd]} {
+		return ""
+	}
+	set result [read $fd]
+	close $fd
+	return $result
+}
+
+set pcie_aspm [read_file /sys/module/pcie_aspm/parameters/policy]
+if {![string match {*\[performance\]*} $pcie_aspm]} {
+	echo "Warn : Switch PCIe power saving off or the first couple of pulses gets clocked as fast as 20 MHz"
+	echo "Warn : Issue 'echo performance | sudo tee /sys/module/pcie_aspm/parameters/policy'"
+}
+
+set GPIO_CHIP 4
+source [find interface/raspberrypi-gpio-connector.cfg]