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* misc: eeprom_93xx46: Add support for a GPIO 'select' line.Cory Tusar2016-02-111-0/+3
| | | | | | | | | | | This commit adds support to the eeprom_93x46 driver allowing a GPIO line to function as a 'select' or 'enable' signal prior to accessing the EEPROM. Signed-off-by: Cory Tusar <cory.tusar@pid1solutions.com> Tested-by: Chris Healy <chris.healy@zii.aero> Reviewed-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: eeprom_93xx46: Add quirks to support Atmel AT93C46D device.Cory Tusar2016-02-111-0/+6
| | | | | | | | | | | | | | | | | | | | Atmel devices in this family have some quirks not found in other similar chips - they do not support a sequential read of the entire EEPROM contents, and the control word sent at the start of each operation varies in bit length. This commit adds quirk support to the driver and modifies the read implementation to support non-sequential reads for consistency with other misc/eeprom drivers. Tested on a custom Freescale VF610-based platform, with an AT93C46D device attached via dspi2. The spi-gpio driver was used to allow the necessary non-byte-sized transfers. Signed-off-by: Cory Tusar <cory.tusar@pid1solutions.com> Tested-by: Chris Healy <chris.healy@zii.aero> Reviewed-by: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc/eeprom: add driver for microwire 93xx46 EEPROMsAnatolij Gustschin2011-07-251-0/+18
Add EEPROM driver for 93xx46 chips. It can also be used with spi_gpio driver to access 93xx46 EEPROMs connected over GPIO lines. This driver supports read/write/erase access to the EEPROM chips over sysfs files. [rdunlap@xenotime.net: fix printk format] Signed-off-by: Anatolij Gustschin <agust@denx.de> Cc: Jonathan Cameron <jic23@cam.ac.uk> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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