dt-bindings: clock: tegra124-dfll: Convert to json-schema

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-NVIDIA Tegra124 DFLL FCPU clocksource
-
-This binding uses the common clock binding:
-Documentation/devicetree/bindings/clock/clock-bindings.txt
-
-The DFLL IP block on Tegra is a root clocksource designed for clocking
-the fast CPU cluster. It consists of a free-running voltage controlled
-oscillator connected to the CPU voltage rail (VDD_CPU), and a closed loop
-control module that will automatically adjust the VDD_CPU voltage by
-communicating with an off-chip PMIC either via an I2C bus or via PWM signals.
-
-Required properties:
-- compatible : should be one of:
-  - "nvidia,tegra124-dfll": for Tegra124
-  - "nvidia,tegra210-dfll": for Tegra210
-- reg : Defines the following set of registers, in the order listed:
-        - registers for the DFLL control logic.
-        - registers for the I2C output logic.
-        - registers for the integrated I2C master controller.
-        - look-up table RAM for voltage register values.
-- interrupts: Should contain the DFLL block interrupt.
-- clocks: Must contain an entry for each entry in clock-names.
-  See clock-bindings.txt for details.
-- clock-names: Must include the following entries:
-  - soc: Clock source for the DFLL control logic.
-  - ref: The closed loop reference clock
-  - i2c: Clock source for the integrated I2C master.
-- resets: Must contain an entry for each entry in reset-names.
-  See ../reset/reset.txt for details.
-- reset-names: Must include the following entries:
-  - dvco: Reset control for the DFLL DVCO.
-- #clock-cells: Must be 0.
-- clock-output-names: Name of the clock output.
-- vdd-cpu-supply: Regulator for the CPU voltage rail that the DFLL
-  hardware will start controlling. The regulator will be queried for
-  the I2C register, control values and supported voltages.
-
-Required properties for the control loop parameters:
-- nvidia,sample-rate: Sample rate of the DFLL control loop.
-- nvidia,droop-ctrl: See the register CL_DVFS_DROOP_CTRL in the TRM.
-- nvidia,force-mode: See the field DFLL_PARAMS_FORCE_MODE in the TRM.
-- nvidia,cf: Numeric value, see the field DFLL_PARAMS_CF_PARAM in the TRM.
-- nvidia,ci: Numeric value, see the field DFLL_PARAMS_CI_PARAM in the TRM.
-- nvidia,cg: Numeric value, see the field DFLL_PARAMS_CG_PARAM in the TRM.
-
-Optional properties for the control loop parameters:
-- nvidia,cg-scale: Boolean value, see the field DFLL_PARAMS_CG_SCALE in the TRM.
-
-Optional properties for mode selection:
-- nvidia,pwm-to-pmic: Use PWM to control regulator rather then I2C.
-
-Required properties for I2C mode:
-- nvidia,i2c-fs-rate: I2C transfer rate, if using full speed mode.
-
-Required properties for PWM mode:
-- nvidia,pwm-period-nanoseconds: period of PWM square wave in nanoseconds.
-- nvidia,pwm-tristate-microvolts: Regulator voltage in micro volts when PWM
-  control is disabled and the PWM output is tristated. Note that this voltage is
-  configured in hardware, typically via a resistor divider.
-- nvidia,pwm-min-microvolts: Regulator voltage in micro volts when PWM control
-  is enabled and PWM output is low. Hence, this is the minimum output voltage
-  that the regulator supports when PWM control is enabled.
-- nvidia,pwm-voltage-step-microvolts: Voltage increase in micro volts
-  corresponding to a 1/33th increase in duty cycle. Eg the voltage for 2/33th
-  duty cycle would be: nvidia,pwm-min-microvolts +
-  nvidia,pwm-voltage-step-microvolts * 2.
-- pinctrl-0: I/O pad configuration when PWM control is enabled.
-- pinctrl-1: I/O pad configuration when PWM control is disabled.
-- pinctrl-names: must include the following entries:
-  - dvfs_pwm_enable: I/O pad configuration when PWM control is enabled.
-  - dvfs_pwm_disable: I/O pad configuration when PWM control is disabled.
-
-Example for I2C:
-
-clock@70110000 {
-        compatible = "nvidia,tegra124-dfll";
-        reg = <0 0x70110000 0 0x100>, /* DFLL control */
-              <0 0x70110000 0 0x100>, /* I2C output control */
-              <0 0x70110100 0 0x100>, /* Integrated I2C controller */
-              <0 0x70110200 0 0x100>; /* Look-up table RAM */
-        interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
-        clocks = <&tegra_car TEGRA124_CLK_DFLL_SOC>,
-                 <&tegra_car TEGRA124_CLK_DFLL_REF>,
-                 <&tegra_car TEGRA124_CLK_I2C5>;
-        clock-names = "soc", "ref", "i2c";
-        resets = <&tegra_car TEGRA124_RST_DFLL_DVCO>;
-        reset-names = "dvco";
-        #clock-cells = <0>;
-        clock-output-names = "dfllCPU_out";
-        vdd-cpu-supply = <&vdd_cpu>;
-
-        nvidia,sample-rate = <12500>;
-        nvidia,droop-ctrl = <0x00000f00>;
-        nvidia,force-mode = <1>;
-        nvidia,cf = <10>;
-        nvidia,ci = <0>;
-        nvidia,cg = <2>;
-
-        nvidia,i2c-fs-rate = <400000>;
-};
-
-Example for PWM:
-
-clock@70110000 {
-	compatible = "nvidia,tegra124-dfll";
-	reg = <0 0x70110000 0 0x100>, /* DFLL control */
-	      <0 0x70110000 0 0x100>, /* I2C output control */
-	      <0 0x70110100 0 0x100>, /* Integrated I2C controller */
-	      <0 0x70110200 0 0x100>; /* Look-up table RAM */
-	interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
-	clocks = <&tegra_car TEGRA210_CLK_DFLL_SOC>,
-	         <&tegra_car TEGRA210_CLK_DFLL_REF>,
-		 <&tegra_car TEGRA124_CLK_I2C5>;;
-	clock-names = "soc", "ref", "i2c";
-	resets = <&tegra_car TEGRA124_RST_DFLL_DVCO>;
-	reset-names = "dvco";
-	#clock-cells = <0>;
-	clock-output-names = "dfllCPU_out";
-
-	nvidia,sample-rate = <25000>;
-	nvidia,droop-ctrl = <0x00000f00>;
-	nvidia,force-mode = <1>;
-	nvidia,cf = <6>;
-	nvidia,ci = <0>;
-	nvidia,cg = <2>;
-
-	nvidia,pwm-min-microvolts = <708000>; /* 708mV */
-	nvidia,pwm-period-nanoseconds = <2500>; /* 2.5us */
-	nvidia,pwm-to-pmic;
-	nvidia,pwm-tristate-microvolts = <1000000>;
-	nvidia,pwm-voltage-step-microvolts = <19200>; /* 19.2mV */
-
-	pinctrl-names = "dvfs_pwm_enable", "dvfs_pwm_disable";
-	pinctrl-0 = <&dvfs_pwm_active_state>;
-	pinctrl-1 = <&dvfs_pwm_inactive_state>;
-};
-
-/* pinmux nodes added for completeness. Binding doc can be found in:
- * Documentation/devicetree/bindings/pinctrl/nvidia,tegra210-pinmux.yaml
- */
-
-pinmux: pinmux@700008d4 {
-	dvfs_pwm_active_state: dvfs_pwm_active {
-		dvfs_pwm_pbb1 {
-			nvidia,pins = "dvfs_pwm_pbb1";
-			nvidia,tristate = <TEGRA_PIN_DISABLE>;
-		};
-	};
-	dvfs_pwm_inactive_state: dvfs_pwm_inactive {
-		dvfs_pwm_pbb1 {
-			nvidia,pins = "dvfs_pwm_pbb1";
-			nvidia,tristate = <TEGRA_PIN_ENABLE>;
-		};
-	};
-};

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