OFFSET_EXT_CONF
[OFFSET_EXT_CONF] = 0x28,
[OFFSET_EXT_CONF] = 0x28,
[OFFSET_EXT_CONF] = 0x28,
mtk_i2c_writew(i2c, ext_conf_val, OFFSET_EXT_CONF);
mtk_i2c_readw(i2c, OFFSET_EXT_CONF));