ICSIER
rcar_i2c_write(priv, ICSIER, SAR);
rcar_i2c_write(priv, ICSIER, 0);
ssr_filtered = ssr_raw & rcar_i2c_read(priv, ICSIER);
rcar_i2c_write(priv, ICSIER, SDE | SSR | SAR);
rcar_i2c_write(priv, ICSIER, SDR | SSR | SAR);
rcar_i2c_write(priv, ICSIER, SAR);