diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/device/i2c_bus.c | 6 | ||||
| -rw-r--r-- | src/include/device/i2c_bus.h | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/device/i2c_bus.c b/src/device/i2c_bus.c index a63086cf41..c355506f72 100644 --- a/src/device/i2c_bus.c +++ b/src/device/i2c_bus.c @@ -6,6 +6,12 @@ #include <device/i2c_bus.h> #include <commonlib/endian.h> +bool i2c_dev_detect(struct device *dev, unsigned int addr) +{ + struct i2c_msg seg = { .flags = 0, .slave = addr, .buf = NULL, .len = 0 }; + return dev->ops->ops_i2c_bus->transfer(dev, &seg, 0) == 0; +} + struct bus *i2c_link(const struct device *const dev) { if (!dev || !dev->bus) diff --git a/src/include/device/i2c_bus.h b/src/include/device/i2c_bus.h index 42f461dc9e..1a7e777278 100644 --- a/src/include/device/i2c_bus.h +++ b/src/include/device/i2c_bus.h @@ -13,6 +13,11 @@ struct i2c_bus_operations { int (*transfer)(struct device *, const struct i2c_msg *, size_t count); }; +/** + * Determine device presence at a given slave address. + */ +bool i2c_dev_detect(struct device *dev, unsigned int addr); + /* * Returns the first upstream facing link whose bus implements either * `i2c_bus_operations` *or* `smbus_bus_operations`. |