diff options
Diffstat (limited to 'kernel/include/linux/spi/max7301.h')
| -rw-r--r-- | kernel/include/linux/spi/max7301.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/kernel/include/linux/spi/max7301.h b/kernel/include/linux/spi/max7301.h new file mode 100644 index 000000000..bcaa2f762 --- /dev/null +++ b/kernel/include/linux/spi/max7301.h @@ -0,0 +1,35 @@ +#ifndef LINUX_SPI_MAX7301_H +#define LINUX_SPI_MAX7301_H + +#include <linux/gpio.h> + +/* + * Some registers must be read back to modify. + * To save time we cache them here in memory + */ +struct max7301 { + struct mutex lock; + u8 port_config[8]; /* field 0 is unused */ + u32 out_level; /* cached output levels */ + u32 input_pullup_active; + struct gpio_chip chip; + struct device *dev; + int (*write)(struct device *dev, unsigned int reg, unsigned int val); + int (*read)(struct device *dev, unsigned int reg); +}; + +struct max7301_platform_data { + /* number assigned to the first GPIO */ + unsigned base; + /* + * bitmask controlling the pullup configuration, + * + * _note_ the 4 lowest bits are unused, because the first 4 + * ports of the controller are not used, too. + */ + u32 input_pullup_active; +}; + +extern int __max730x_remove(struct device *dev); +extern int __max730x_probe(struct max7301 *ts); +#endif |