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(snip) > > compatible = "rcar,r8a78000-mfis-mailbox", > > "rcar,gen5-mfis-mailbox", > > "rcar,mfis-mailbox"; (snip) > You changed nothing. Please read again Geert answer. I guess you mentioned about generic compatible "rcar,mfis-mailbox". I didn't mention in this mail thread (?), but 1) we can keep compatible with Gen3/Gen4 and Gen5, 2) we don't support Gen3/Gen4. Thank you for your help !! Best regards --- Kuninori Morimoto