diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/spi/mcp23s08.h | 15 | ||||
| -rw-r--r-- | include/linux/spi/spi_oc_tiny.h | 20 |
2 files changed, 29 insertions, 6 deletions
diff --git a/include/linux/spi/mcp23s08.h b/include/linux/spi/mcp23s08.h index 22ef107..c42cff8 100644 --- a/include/linux/spi/mcp23s08.h +++ b/include/linux/spi/mcp23s08.h @@ -2,21 +2,24 @@ /* FIXME driver should be able to handle IRQs... */ struct mcp23s08_chip_info { - bool is_present; /* true iff populated */ - u8 pullups; /* BIT(x) means enable pullup x */ + bool is_present; /* true if populated */ + unsigned pullups; /* BIT(x) means enable pullup x */ }; struct mcp23s08_platform_data { - /* Four slaves (numbered 0..3) can share one SPI chipselect, and - * will provide 8..32 GPIOs using 1..4 gpio_chip instances. + /* For mcp23s08, up to 4 slaves (numbered 0..3) can share one SPI + * chipselect, each providing 1 gpio_chip instance with 8 gpios. + * For mpc23s17, up to 8 slaves (numbered 0..7) can share one SPI + * chipselect, each providing 1 gpio_chip (port A + port B) with + * 16 gpios. */ - struct mcp23s08_chip_info chip[4]; + struct mcp23s08_chip_info chip[8]; /* "base" is the number of the first GPIO. Dynamic assignment is * not currently supported, and even if there are gaps in chip * addressing the GPIO numbers are sequential .. so for example * if only slaves 0 and 3 are present, their GPIOs range from - * base to base+15. + * base to base+15 (or base+31 for s17 variant). */ unsigned base; diff --git a/include/linux/spi/spi_oc_tiny.h b/include/linux/spi/spi_oc_tiny.h new file mode 100644 index 0000000..1ac529c --- /dev/null +++ b/include/linux/spi/spi_oc_tiny.h @@ -0,0 +1,20 @@ +#ifndef _LINUX_SPI_SPI_OC_TINY_H +#define _LINUX_SPI_SPI_OC_TINY_H + +/** + * struct tiny_spi_platform_data - platform data of the OpenCores tiny SPI + * @freq: input clock freq to the core. + * @baudwidth: baud rate divider width of the core. + * @gpio_cs_count: number of gpio pins used for chipselect. + * @gpio_cs: array of gpio pins used for chipselect. + * + * freq and baudwidth are used only if the divider is programmable. + */ +struct tiny_spi_platform_data { + unsigned int freq; + unsigned int baudwidth; + unsigned int gpio_cs_count; + int *gpio_cs; +}; + +#endif /* _LINUX_SPI_SPI_OC_TINY_H */ |
