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config DM_I2C
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bool "Enable Driver Model for I2C drivers"
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depends on DM
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help
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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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bool "Enable I2C compatibility layer"
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depends on DM
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help
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Enable old-style I2C functions for compatibility with existing code.
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This option can be enabled as a temporary measure to avoid needing
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to convert all code for a board in a single commit. It should not
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be enabled for any board in an official release.
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config DM_I2C_GPIO
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bool "Enable Driver Model for software emulated I2C bus driver"
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depends on DM_I2C && DM_GPIO
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help
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Enable the i2c bus driver emulation by using the GPIOs. The bus GPIO
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configuration is given by the device tree. Kernel-style device tree
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bindings are supported.
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Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
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config SYS_I2C_SANDBOX
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bool "Sandbox I2C driver"
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depends on SANDBOX && DM_I2C
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help
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Enable I2C support for sandbox. This is an emulation of a real I2C
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bus. Devices can be attached to the bus using the device tree
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which specifies the driver to use. As an example, see this device
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tree fragment from sandbox.dts. It shows that the I2C bus has a
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single EEPROM at address 0x2c (7-bit address) which is emulated by
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the driver for "sandbox,i2c-eeprom", which is in
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drivers/misc/i2c_eeprom_emul.c.
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i2c@0 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0>;
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compatible = "sandbox,i2c";
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clock-frequency = <400000>;
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eeprom@2c {
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reg = <0x2c>;
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compatible = "i2c-eeprom";
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emul {
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compatible = "sandbox,i2c-eeprom";
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sandbox,filename = "i2c.bin";
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sandbox,size = <128>;
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};
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};
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};
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config SYS_I2C_UNIPHIER
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bool "UniPhier I2C driver"
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depends on ARCH_UNIPHIER && DM_I2C
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default y
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help
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Support for UniPhier I2C controller driver. This I2C controller
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is used on PH1-LD4, PH1-sLD8 or older UniPhier SoCs.
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config SYS_I2C_UNIPHIER_F
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bool "UniPhier FIFO-builtin I2C driver"
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depends on ARCH_UNIPHIER && DM_I2C
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default y
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help
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Support for UniPhier FIFO-builtin I2C controller driver.
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This I2C controller is used on PH1-Pro4 or newer UniPhier SoCs.
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