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clock/gowin_gw5a: change allowed frequency range for GW5A- prefix 

When targeting GW5A-25 ES, the Gowin IDE has a more strict frequency
range.

Change the range when GW5A- is matched to this.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
This commit is contained in:
Icenowy Zheng 2023-09-05 16:50:49 +08:00
parent 85dadb827a
commit 7afe06a60c
1 changed files with 6 additions and 2 deletions
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8
litex/soc/cores/clock/gowin_gw5a.py
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@ -36,7 +36,9 @@ class GW5APLL(LiteXModule):
@staticmethod
def get_vco_freq_range(device):
vco_freq_range = None
if device.startswith('GW5A-') or device.startswith('GW5AT-') or device.startswith('GW5AST-'):
if device.startswith('GW5A-'):
vco_freq_range = (800e6, 1600e6) # As restricted by Gowin toolchain 1.9.9b3
elif device.startswith('GW5A-') or device.startswith('GW5AT-') or device.startswith('GW5AST-'):
vco_freq_range = (800e6, 2000e6) # datasheet values
if vco_freq_range is None:
raise ValueError(f"Unsupported device {device}.")
@ -45,7 +47,9 @@ class GW5APLL(LiteXModule):
@staticmethod
def get_pfd_freq_range(device):
pfd_freq_range = None
if device.startswith('GW5A-') or device.startswith('GW5AT-') or device.startswith('GW5AST-'):
if device.startswith('GW5A-'):
pfd_freq_range = (19e6, 400e6) # As restricted by Gowin toolchain 1.9.9b3
elif device.startswith('GW5AT-') or device.startswith('GW5AST-'):
pfd_freq_range = (10e6, 400e6) # datasheet values
if pfd_freq_range is None:
raise ValueError(f"Unsupported device {device}.")