1bb6f9b042
There's no in-tree users, and bus notifiers are more generic anyway. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
26 lines
871 B
C
26 lines
871 B
C
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/* FIXME driver should be able to handle IRQs... */
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struct mcp23s08_chip_info {
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bool is_present; /* true if populated */
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unsigned pullups; /* BIT(x) means enable pullup x */
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};
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struct mcp23s08_platform_data {
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/* For mcp23s08, up to 4 slaves (numbered 0..3) can share one SPI
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* chipselect, each providing 1 gpio_chip instance with 8 gpios.
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* For mpc23s17, up to 8 slaves (numbered 0..7) can share one SPI
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* chipselect, each providing 1 gpio_chip (port A + port B) with
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* 16 gpios.
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*/
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struct mcp23s08_chip_info chip[8];
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/* "base" is the number of the first GPIO. Dynamic assignment is
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* not currently supported, and even if there are gaps in chip
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* addressing the GPIO numbers are sequential .. so for example
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* if only slaves 0 and 3 are present, their GPIOs range from
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* base to base+15 (or base+31 for s17 variant).
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*/
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unsigned base;
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};
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