A64_MIC2AMPEN
a64_acodec_pr_set_clear(sc, A64_MIC2_CTRL, A64_MIC2AMPEN, 0);
a64_acodec_pr_set_clear(sc, A64_MIC2_CTRL, 0, A64_MIC2AMPEN);
mc->un.ord = !!(a64_acodec_pr_read(sc, A64_MIC2_CTRL) & A64_MIC2AMPEN);