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- Kernel driver spi-sc18is602
- ===========================
- Supported chips:
- * NXP SI18IS602/602B/603
- Datasheet: http://www.nxp.com/documents/data_sheet/SC18IS602_602B_603.pdf
- Author:
- Guenter Roeck <linux@roeck-us.net>
- Description
- -----------
- This driver provides connects a NXP SC18IS602/603 I2C-bus to SPI bridge to the
- kernel's SPI core subsystem.
- The driver does not probe for supported chips, since the SI18IS602/603 does not
- support Chip ID registers. You will have to instantiate the devices explicitly.
- Please see Documentation/i2c/instantiating-devices for details.
- Usage Notes
- -----------
- This driver requires the I2C adapter driver to support raw I2C messages. I2C
- adapter drivers which can only handle the SMBus protocol are not supported.
- The maximum SPI message size supported by SC18IS602/603 is 200 bytes. Attempts
- to initiate longer transfers will fail with -EINVAL. EEPROM read operations and
- similar large accesses have to be split into multiple chunks of no more than
- 200 bytes per SPI message (128 bytes of data per message is recommended). This
- means that programs such as "cp" or "od", which automatically use large block
- sizes to access a device, can not be used directly to read data from EEPROM.
- Programs such as dd, where the block size can be specified, should be used
- instead.
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