- /*
- * Read ADC channel waiting at most 400ms (see data sheet for further
- * info).
- * To avoid long busy wait we spin for few milliseconds then
- * start sleeping.
- */
- end = jiffies + msecs_to_jiffies(400);
- while (time_before(jiffies, end)) {
- i2c_smbus_write_byte(client, cmd);
-
- if (loop++ < 5)
- mdelay(1);
- else
- msleep(1);
-
- ret = i2c_smbus_read_byte(client);
- if (ret < 0)
- return ret;
- else if (ret & 0x0080)
- break;
- }