3ca9b1ac28
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>
28 lines
723 B
C
28 lines
723 B
C
/*
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* Module: eeprom_93xx46
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* platform description for 93xx46 EEPROMs.
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*/
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struct gpio_desc;
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struct eeprom_93xx46_platform_data {
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unsigned char flags;
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#define EE_ADDR8 0x01 /* 8 bit addr. cfg */
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#define EE_ADDR16 0x02 /* 16 bit addr. cfg */
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#define EE_READONLY 0x08 /* forbid writing */
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unsigned int quirks;
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/* Single word read transfers only; no sequential read. */
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#define EEPROM_93XX46_QUIRK_SINGLE_WORD_READ (1 << 0)
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/* Instructions such as EWEN are (addrlen + 2) in length. */
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#define EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH (1 << 1)
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/*
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* optional hooks to control additional logic
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* before and after spi transfer.
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*/
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void (*prepare)(void *);
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void (*finish)(void *);
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struct gpio_desc *select;
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};
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