MESON_SDHC_ISTA
regmap_write(host->regmap, MESON_SDHC_ISTA, MESON_SDHC_ISTA_ALL_IRQS);
regmap_update_bits(host->regmap, MESON_SDHC_ISTA,
regmap_read(host->regmap, MESON_SDHC_ISTA, &ista);
regmap_write(host->regmap, MESON_SDHC_ISTA, MESON_SDHC_ISTA_ALL_IRQS);