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@@ -2,16 +2,13 @@ config DM_I2C
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bool "Enable Driver Model for I2C drivers"
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bool "Enable Driver Model for I2C drivers"
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depends on DM
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depends on DM
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help
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help
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- Enable driver model for I2C. This SPI flash interface
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- (spi_flash_probe(), spi_flash_write(), etc.) is then
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- implemented by the SPI flash uclass. There is one standard
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- SPI flash driver which knows how to probe most chips
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- supported by U-Boot. The uclass interface is defined in
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- include/spi_flash.h, but is currently fully compatible
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- with the old interface to avoid confusion and duplication
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- during the transition parent. SPI and SPI flash must be
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- enabled together (it is not possible to use driver model
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- for one and not the other).
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+ Enable driver model for I2C. The I2C uclass interface: probe, read,
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+ write and speed, is implemented with the bus drivers operations,
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+ which provide methods for bus setting and data transfer. Each chip
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+ device (bus child) info is kept as parent platdata. The interface
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+ is defined in include/i2c.h. When i2c bus driver supports the i2c
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+ uclass, but the device drivers not, then DM_I2C_COMPAT config can
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+ be used as compatibility layer.
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config DM_I2C_COMPAT
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config DM_I2C_COMPAT
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bool "Enable I2C compatibility layer"
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bool "Enable I2C compatibility layer"
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Przemyslaw Marczak