> + switch (dev->state) {
> + case SC18IS600_STAT_OK:
> + break;
> + case SC18IS600_STAT_NAK_ADDR:
> + return -EIO;
> + case SC18IS600_STAT_NAK_DATA:
> + return -EREMOTEIO;
> + case SC18IS600_STAT_SIZE:
> + return -EINVAL;
> + case SC18IS600_STAT_TIMEOUT:
> + return -ETIMEDOUT;
> + case SC18IS600_STAT_TIMEOUT2:
> + return -ETIMEDOUT;
> + case SC18IS600_STAT_BLOCKED:
> + return -ETIMEDOUT;
> + default:
> + case SC18IS600_STAT_BUSY:
> + dev_err(&dev->spi->dev, "device hangup detected, reset!");
> + sc18is600_reset(dev);
> + return -EAGAIN;
> + }Please have a look at Documentation/i2c/fault-codes. Most look good, but the NAK cases probably need fixing.
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