-
- /* AD7418 has a curious behaviour on registers 6 and 7. They
- * both always read 0xC071 and are not documented on the datasheet.
- * We use them to detect the chip.
- */
- if (kind <= 0) {
- int reg, reg6, reg7;
-
- /* the AD7416 lies within this address range, but I have
- * no means to check.
- */
- if (address >= 0x48 && address <= 0x4f) {
- /* XXX add tests for AD7416 here */
- /* data->type = ad7416; */
- }
- /* here we might have AD7417 or AD7418 */
- else if (address >= 0x28 && address <= 0x2f) {
- reg6 = i2c_smbus_read_word_data(client, 0x06);
- reg7 = i2c_smbus_read_word_data(client, 0x07);
-
- if (address == 0x28 && reg6 == 0xC071 && reg7 == 0xC071)
- data->type = ad7418;
-
- /* XXX add tests for AD7417 here */
-
-
- /* both AD7417 and AD7418 have bits 0-5 of
- * the CONF2 register at 0
- */
- reg = i2c_smbus_read_byte_data(client,
- AD7418_REG_CONF2);
- if (reg & 0x3F)
- data->type = any_chip; /* detection failed */
- }
- } else {
- dev_dbg(&adapter->dev, "detection forced\n");
- }
-
- if (kind > 0)
- data->type = kind;
- else if (kind < 0 && data->type == any_chip) {
- err = -ENODEV;
- goto exit_free;
- }