ISR_SAD
| ISR_GCAD | ISR_SAD | ISR_BED)
if ((rv & (ISR_SAD | ISR_UB)) == (ISR_SAD | ISR_UB))
bus_space_write_4(iot, ioh, I2C_ISR, ISR_SAD); /* Clear SAD */
isr & (ISR_BED|ISR_SAD|ISR_IRF|ISR_ITE|ISR_ALD|ISR_SSD));
if (isr & ISR_SAD) { /* Slave Address Detected */