mirror of https://gitee.com/openkylin/linux.git
42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
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ST SSC binding, for I2C mode operation
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Required properties :
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- compatible : Must be "st,comms-ssc-i2c" or "st,comms-ssc4-i2c"
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- reg : Offset and length of the register set for the device
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- interrupts : the interrupt specifier
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- clock-names: Must contain "ssc".
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- clocks: Must contain an entry for each name in clock-names. See the common
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clock bindings.
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- A pinctrl state named "default" must be defined to set pins in mode of
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operation for I2C transfer.
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Optional properties :
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- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
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the default 100 kHz frequency will be used. As only Normal and Fast modes
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are supported, possible values are 100000 and 400000.
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- st,i2c-min-scl-pulse-width-us : The minimum valid SCL pulse width that is
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allowed through the deglitch circuit. In units of us.
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- st,i2c-min-sda-pulse-width-us : The minimum valid SDA pulse width that is
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allowed through the deglitch circuit. In units of us.
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- A pinctrl state named "idle" could be defined to set pins in idle state
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when I2C instance is not performing a transfer.
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- A pinctrl state named "sleep" could be defined to set pins in sleep state
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when driver enters in suspend.
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Example :
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i2c0: i2c@fed40000 {
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compatible = "st,comms-ssc4-i2c";
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reg = <0xfed40000 0x110>;
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interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&CLK_S_ICN_REG_0>;
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clock-names = "ssc";
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clock-frequency = <400000>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_i2c0_default>;
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st,i2c-min-scl-pulse-width-us = <0>;
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st,i2c-min-sda-pulse-width-us = <5>;
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};
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