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Add mon_status and refsel_status fields to struct zl3073x_chan in a stat group to cache the 'dpll_mon_status' and 'dpll_refsel_status' registers. Add zl3073x_chan_lock_state_get(), zl3073x_chan_is_ho_ready(), zl3073x_chan_refsel_state_get() and zl3073x_chan_refsel_ref_get() inline helpers for reading cached state, and zl3073x_chan_state_update() for refreshing both registers from hardware. Call it from zl3073x_chan_state_fetch() as well so that channel status is initialized at device startup. Call zl3073x_dev_chan_states_update() from the periodic work to keep the cached state up to date and convert zl3073x_dpll_lock_status_get() and zl3073x_dpll_selected_ref_get() to use the cached state via the new helpers instead of direct register reads. Signed-off-by: Ivan Vecera <ivecera@redhat.com> Link: https://patch.msgid.link/20260315174224.399074-5-ivecera@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>