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Ensure the current pin frequency is always present in the list of supported frequencies reported to userspace. Previously, if the firmware node was missing or didn't include the current operating frequency in the supported-frequencies-hz property, the pin would report a frequency that wasn't in its supported list. Get the current frequency early in zl3073x_pin_props_get(): - For input pins: use zl3073x_dev_ref_freq_get() - For output pins: use zl3073x_dev_output_pin_freq_get() Place the current frequency at index 0 of the supported frequencies array, then append frequencies from the firmware node (if present), skipping any duplicate of the current frequency. Signed-off-by: Ivan Vecera <ivecera@redhat.com> Link: https://patch.msgid.link/20260205154350.3180465-3-ivecera@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>