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Add support for the I2C controller found on several NXP devices including LPC2xxx, LPC178x/7x and LPC18xx/43xx. The controller is implemented as a state machine and the driver act upon the state changes when the bus is accessed. The I2C controller supports master/slave operation, bus arbitration, programmable clock rate, and speeds up to 1 Mbit/s. Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
34 lines
751 B
Plaintext
34 lines
751 B
Plaintext
NXP I2C controller for LPC2xxx/178x/18xx/43xx
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Required properties:
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- compatible: must be "nxp,lpc1788-i2c"
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- reg: physical address and length of the device registers
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- interrupts: a single interrupt specifier
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- clocks: clock for the device
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- #address-cells: should be <1>
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- #size-cells: should be <0>
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Optional properties:
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- clock-frequency: the desired I2C bus clock frequency in Hz; in
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absence of this property the default value is used (100 kHz).
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Example:
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i2c0: i2c@400a1000 {
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compatible = "nxp,lpc1788-i2c";
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reg = <0x400a1000 0x1000>;
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interrupts = <18>;
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clocks = <&ccu1 CLK_APB1_I2C0>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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&i2c0 {
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clock-frequency = <400000>;
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lm75@48 {
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compatible = "nxp,lm75";
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reg = <0x48>;
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};
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};
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