GVBB_I2C
u8 gvbb_i2c = itd1000_read_reg(state, GVBB_I2C) & 0xbf;
itd1000_write_reg(state, GVBB_I2C, gvbb_i2c | (1 << 6));
{ GVBB_I2C, 0x03 },