DTS Configuration
The configuration of DTS includes: I2C mount, body, regulator, rtc, and other parts. The
following code block shows an example of the device tree source code of the "&i2c5"
and "pmic_axp15060: axp15060_reg@36
".
&i2c5 {
clock-frequency = <100000>;
i2c-sda-hold-time-ns = <300>;
i2c-sda-falling-time-ns = <510>;
i2c-scl-falling-time-ns = <510>;
auto_calc_scl_lhcnt;
pinctrl-names = "default";
pinctrl-0 = <&i2c5_pins>;
status = "okay";
pmic_axp15060: axp15060_reg@36 {
compatible = "starfive,axp15060-regulator";
reg = <0x36>;
regulators {
cpu_vdd: DCDC2 {
regulator-boot-on;
regulator-always-on;
regulator-compatible = "cpu_vdd";
regulator-name = "cpu_vdd";
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1540000>;
};
emmc_vdd: BLDO3 {
regulator-boot-on;
regulator-always-on;
regulator-compatible = "emmc_vdd";
regulator-name = "emmc_vdd";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
};
vcc_3v3: BLDO4 {
regulator-boot-on;
regulator-always-on;
regulator-compatible = "vcc_3v3";
regulator-name = "vcc_3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
};
};
};The following list provides explanations for the parameters included in the above code
block.
- clock-frequency: The frequency of the above clock.
- pinctrl-names: The name of the pinctrl.
- status: The work status of the i2c.
- compatible: Compatibility information, used to associate the driver and its target device.
- reg: Register base address of i2c.
- regulators: Regulators that needed to be controlled.
- regulator-boot-on: The regulator that is enabled by the bootloader or firmware.
- regulator-always-on: Never perform the power-off operation on the regulator.
- regulator-min-microvolt: The minimum voltage that the user can set.
- regulator-max-microvolt: The maximum voltage that the user can set.