ATOM_S6_HW_I2C_BUSY_STATE
WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;
WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE);
tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE;