mirror of https://gitee.com/openkylin/linux.git
42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
ST SSC binding, for I2C mode operation
|
|
|
|
Required properties :
|
|
- compatible : Must be "st,comms-ssc-i2c" or "st,comms-ssc4-i2c"
|
|
- reg : Offset and length of the register set for the device
|
|
- interrupts : the interrupt specifier
|
|
- clock-names: Must contain "ssc".
|
|
- clocks: Must contain an entry for each name in clock-names. See the common
|
|
clock bindings.
|
|
- A pinctrl state named "default" must be defined to set pins in mode of
|
|
operation for I2C transfer.
|
|
|
|
Optional properties :
|
|
- clock-frequency : Desired I2C bus clock frequency in Hz. If not specified,
|
|
the default 100 kHz frequency will be used. As only Normal and Fast modes
|
|
are supported, possible values are 100000 and 400000.
|
|
- st,i2c-min-scl-pulse-width-us : The minimum valid SCL pulse width that is
|
|
allowed through the deglitch circuit. In units of us.
|
|
- st,i2c-min-sda-pulse-width-us : The minimum valid SDA pulse width that is
|
|
allowed through the deglitch circuit. In units of us.
|
|
- A pinctrl state named "idle" could be defined to set pins in idle state
|
|
when I2C instance is not performing a transfer.
|
|
- A pinctrl state named "sleep" could be defined to set pins in sleep state
|
|
when driver enters in suspend.
|
|
|
|
|
|
|
|
Example :
|
|
|
|
i2c0: i2c@fed40000 {
|
|
compatible = "st,comms-ssc4-i2c";
|
|
reg = <0xfed40000 0x110>;
|
|
interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
|
|
clocks = <&clk_s_a0_ls CLK_ICN_REG>;
|
|
clock-names = "ssc";
|
|
clock-frequency = <400000>;
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&pinctrl_i2c0_default>;
|
|
st,i2c-min-scl-pulse-width-us = <0>;
|
|
st,i2c-min-sda-pulse-width-us = <5>;
|
|
};
|