diff options
Diffstat (limited to 'src/include/device/i2c.h')
| -rw-r--r-- | src/include/device/i2c.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/include/device/i2c.h b/src/include/device/i2c.h index c8c7b2283d..d8a793c716 100644 --- a/src/include/device/i2c.h +++ b/src/include/device/i2c.h @@ -168,4 +168,26 @@ static inline int i2c_writeb(unsigned bus, uint8_t chip, uint8_t reg, return i2c_transfer(bus, &seg, 1); } +/* I2C bus operation for ramstage drivers */ +struct device; +struct i2c_bus_operations { + /* + * This is an SOC specific method that can be provided to translate the + * 'struct device' for an I2C controller into a unique I2C bus number. + * Returns -1 if the bus number for this device cannot be determined. + */ + int (*dev_to_bus)(struct device *dev); +}; + +/* Return I2C bus number for provided device, -1 if not found */ +int i2c_dev_find_bus(struct device *dev); + +/* Variants of I2C helper functions that take a device instead of bus number */ +int i2c_dev_transfer(struct device *dev, struct i2c_seg *segments, int count); +int i2c_dev_readb(struct device *dev, uint8_t reg, uint8_t *data); +int i2c_dev_writeb(struct device *dev, uint8_t reg, uint8_t data); +int i2c_dev_read_bytes(struct device *dev, uint8_t reg, uint8_t *data, int len); +int i2c_dev_read_raw(struct device *dev, uint8_t *data, int len); +int i2c_dev_write_raw(struct device *dev, uint8_t *data, int len); + #endif /* _DEVICE_I2C_H_ */ |