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Driver for the native I2C adapter found in Rockchip RK3xxx SoCs. Configuration is only possible through devicetree. The driver is interrupt driven and supports the I2C_M_IGNORE_NAK mangling bit. Signed-off-by: Max Schwarz <max.schwarz@online.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
43 lines
981 B
Plaintext
43 lines
981 B
Plaintext
* Rockchip RK3xxx I2C controller
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This driver interfaces with the native I2C controller present in Rockchip
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RK3xxx SoCs.
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Required properties :
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- reg : Offset and length of the register set for the device
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- compatible : should be "rockchip,rk3066-i2c", "rockchip,rk3188-i2c" or
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"rockchip,rk3288-i2c".
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- interrupts : interrupt number
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- clocks : parent clock
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Required on RK3066, RK3188 :
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- rockchip,grf : the phandle of the syscon node for the general register
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file (GRF)
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- on those SoCs an alias with the correct I2C bus ID (bit offset in the GRF)
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is also required.
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Optional properties :
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- clock-frequency : SCL frequency to use (in Hz). If omitted, 100kHz is used.
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Example:
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aliases {
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i2c0 = &i2c0;
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}
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i2c0: i2c@2002d000 {
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compatible = "rockchip,rk3188-i2c";
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reg = <0x2002d000 0x1000>;
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interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
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#address-cells = <1>;
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#size-cells = <0>;
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rockchip,grf = <&grf>;
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clock-names = "i2c";
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clocks = <&cru PCLK_I2C0>;
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};
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