REG_CTRL_START
meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, 0);
meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, REG_CTRL_START);
meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, REG_CTRL_START);
meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, 0);
meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, 0);