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assists: gen_domain_dts: Add TTC counter support for Zephyr DTS #728

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Merged
zeddii merged 1 commit into from
Apr 6, 2026
Merged

assists: gen_domain_dts: Add TTC counter support for Zephyr DTS #728

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50 changes: 34 additions & 16 deletions lopper/assists/gen_domain_dts.py
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Original file line number Diff line number Diff line change
Expand Up @@ -763,7 +763,7 @@ def xlnx_generate_zephyr_domain_dts_arm(tgt_node, sdt, options, machine):
if "xlnx,zynqmp-rtc" in node["compatible"].value:
rtc_nodes.append(node)

xlnx_remove_unsupported_nodes(tgt_node, sdt)
xlnx_remove_unsupported_nodes(tgt_node, sdt, machine)

# Zephyr Watchdog samples/tests expects watchdog0 alias.
# Add watchdog0 alias by referring it to the first occurence of the wwdt node
Expand All @@ -785,15 +785,13 @@ def xlnx_generate_zephyr_domain_dts_arm(tgt_node, sdt, options, machine):
compatible = node.propval('compatible', list)[0]
if compatible == "arm,armv8-timer" and 'psv_cortexr5' in machine:
sdt.tree.delete(node)
if compatible == "xlnx,ttcps" and 'psv_cortexr5' not in machine:
sdt.tree.delete(node)
if node.name == 'reserved-memory' and 'r52' in machine:
node.delete('ranges')
node + LopperProp(name='ranges')

return True

def xlnx_remove_unsupported_nodes(tgt_node, sdt):
def xlnx_remove_unsupported_nodes(tgt_node, sdt, machine):
root_node = sdt.tree['/']
root_sub_nodes = root_node.subnodes()
valid_alias_proplist = []
Expand Down Expand Up @@ -939,18 +937,38 @@ def xlnx_remove_unsupported_nodes(tgt_node, sdt):
node["compatible"] = "xlnx,versal-8.9a"
# TTCPS
if "cdns,ttc" in node["compatible"].value:
node["compatible"] = "xlnx,ttcps"
if node.propval('interrupt-names') == ['']:
ttc_irq_names = ["irq_0", "irq_1", "irq_2"]
node["interrupt-names"] = LopperProp("interrupt-names")
node["interrupt-names"].value = ttc_irq_names
node.add(node["interrupt-names"])
clk_freq = node.propval('xlnx,clock-freq')
# Round to nearest MHz (optional but clean)
rounded_clk = int(round(clk_freq[0] / 1000000.0)) * 1000000
node["clock-frequency"] = LopperProp("clock-frequency")
node["clock-frequency"].value = rounded_clk
node.add(node["clock-frequency"])
if 'psv_cortexr5' in machine:
node["compatible"] = "xlnx,ttcps"
if node.propval('interrupt-names') == ['']:
ttc_irq_names = ["irq_0", "irq_1", "irq_2"]
node["interrupt-names"] = LopperProp("interrupt-names")
node["interrupt-names"].value = ttc_irq_names
node.add(node["interrupt-names"])
clk_freq = node.propval('xlnx,clock-freq')
# Round to nearest MHz (optional but clean)
rounded_clk = int(round(clk_freq[0] / 1000000.0)) * 1000000
node["clock-frequency"] = LopperProp("clock-frequency")
node["clock-frequency"].value = rounded_clk
node.add(node["clock-frequency"])
else:
for i in range(3):
new_node = LopperNode()
new_node["compatible"] = "xlnx,ttc-counter"
new_node["clock-frequency"] = LopperProp("clock-frequency")
new_node["clock-frequency"].value = node["xlnx,clock-freq"].value
new_node.add(new_node["clock-frequency"])
new_node["reg"] = node["reg"]
new_node.label_set(f"{node.label}_timer{i}")
new_node["interrupt-parent"] = node["interrupt-parent"]
new_node.name = f"counter{i}@{node['reg'][1]:x}"
new_node["timer-id"] = LopperProp("timer-id")
new_node["timer-id"].value = i
new_node["interrupts"] = LopperProp("interrupts")
new_node["interrupts"].value = node["interrupts"].value[i * 4 : (i + 1) * 4]
new_node["timer-width"] = node["timer-width"]
new_node.parent = node.parent
node.parent.add(new_node)
sdt.tree.delete(node)
# CANFD
if "xlnx,canfd-2.0" in node["compatible"].value:
node["compatible"] = "xlnx,canfd-2.0"
Expand Down
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