renesas,ra-acmphs

Note

An implementation of a driver matching this compatible is available in drivers/comparator/comparator_renesas_ra.c.

Description

Renesas RA ACMPHS (High-Speed Analog COMParator) Controller

The following example displays the minimum node layout:

  acmphs_global: acmphs_global@deadbeef {
          ...

          acmphs0: acmphs0 {
                  compatible = "renesas,ra-acmphs";
                  channel = <0>;
                  status = "disabled";
          };
  };

Enabling the comparator controller node requires setting the minimum
default configuration of the comparator. This includes selecting the
positive and negative inputs, and routing them using pinctrl:

Note: A set of pinctrl for the default comparator controller node is
already defined on each board that supported comparator. Please check
the board’s pinctrl before defining it.

&pinctrl {
        acmphs_ivref0: acmphs_ivref0 {
                group1 {
                        /* IVREF0 */
                        psels = <RA_PSEL(RA_PSEL_ACMPHS, ..., ...)>;
                        renesas,analog-enable;
                };
        };

        acmphs0_ivcmp0: acmphs0_ivcmp0 {
                group1 {
                        /* CH0 IVCMP0 */
                        psels = <RA_PSEL(RA_PSEL_ACMPHS, ..., ...)>;
                        renesas,analog-enable;
                };
        };
};

&acmphs_global {
        status = "okay";

        acmphs0 {
                pinctrl-0 = <&acmphs_ivref0 &acmphs0_ivcmp0>;
                pinctrl-names = "default";
                interrupts = <90 12>;
                interrupt-names = "hs";
                reference-input-source = "ivref0";
                compare-input-source = "ivcmp0";
                status = "okay";
        };
};

Properties

Properties not inherited from the base binding file.

Name	Type	Details
`channel`	`int`	This property is required.
`reference-input-source`	`string`	Select the Analog reference voltage source. Note: ivref2 is connected to Vref ivref3 is connected to DA0 (DAC) If either of these is selected, there is no need to configure pinsel for pinctrl. This property is required. Legal values: `'ivref0'`, `'ivref1'`, `'ivref2'`, `'ivref3'`
`compare-input-source`	`string`	Select the Analog compare voltage source. Note: ivcmp1 is connected to DA0 (DAC) If ivcmp1 is selected, there is no need to configure pinsel for pinctrl. This property is required. Legal values: `'ivcmp0'`, `'ivcmp1'`, `'ivcmp2'`, `'ivcmp3'`
`noise-filter`	`int`	Select the PCLK divisor for the hardware digital debounce filter. Larger divisors provide a longer debounce and take longer for the output to update. Default value: `32` Legal values: `1`, `8`, `16`, `32`
`output-invert-polarity`	`boolean`	When enabled comparator output is inverted.
`pin-output-enable`	`boolean`	Turn this on to enable the CMPOUTn signal for this channel. The CMPOUTn signal for each channel is OR'd together and the result is output to VCOUT.
`pinctrl-0`	`phandles`	Pin configuration/s for the first state. Content is specific to the selected pin controller driver implementation.
`pinctrl-1`	`phandles`	Pin configuration/s for the second state. See pinctrl-0.
`pinctrl-2`	`phandles`	Pin configuration/s for the third state. See pinctrl-0.
`pinctrl-3`	`phandles`	Pin configuration/s for the fourth state. See pinctrl-0.
`pinctrl-4`	`phandles`	Pin configuration/s for the fifth state. See pinctrl-0.
`pinctrl-names`	`string-array`	Names for the provided states. The number of names needs to match the number of states.

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “renesas,ra-acmphs” compatible.

Name	Type	Details
`interrupts`	`array`	IRQ number and priority to use for interrupt Comparator: - "hs": generated on valid edge detection from comparison result Note: when this interrupts property is not defined, none of the trigger APIs can be used (set_trigger, set_trigger_callback, trigger_is_pending). See Important properties for more information.
`status`	`string`	Indicates the operational status of the hardware or other resource that the node represents. In particular: - "okay" means the resource is operational and, for example, can be used by device drivers - "disabled" means the resource is not operational and the system should treat it as if it is not present For details, see "2.3.4 status" in Devicetree Specification v0.4. Legal values: `'ok'`, `'okay'`, `'disabled'`, `'reserved'`, `'fail'`, `'fail-sss'` See Important properties for more information.
`compatible`	`string-array`	This property is a list of strings that essentially define what type of hardware or other resource this devicetree node represents. Each device driver checks for specific compatible property values to find the devicetree nodes that represent resources that the driver should manage. The recommended format is "vendor,device", The "vendor" part is an abbreviated name of the vendor. The "device" is usually from the datasheet. The compatible property can have multiple values, ordered from most- to least-specific. Having additional values is useful when the device is a specific instance of a more general family, to allow the system to match the most specific driver available. For details, see "2.3.1 compatible" in Devicetree Specification v0.4. This property is required. See Important properties for more information.
`reg`	`array`	Information used to address the device. The value is specific to the device (i.e. is different depending on the compatible property). The "reg" property is typically a sequence of (address, length) pairs. Each pair is called a "register block". Values are conventionally written in hex. For details, see "2.3.6 reg" in Devicetree Specification v0.4. See Important properties for more information.
`reg-names`	`string-array`	Optional names given to each register block in the "reg" property. For example: / { soc { #address-cells = <1>; #size-cells = <1>; uart@1000 { reg = <0x1000 0x2000>, <0x3000 0x4000>; reg-names = "foo", "bar"; }; }; }; The uart@1000 node has two register blocks: - one with base address 0x1000, size 0x2000, and name "foo" - another with base address 0x3000, size 0x4000, and name "bar"
`interrupts-extended`	`compound`	Extended interrupt specifier for device, used as an alternative to the "interrupts" property. For details, see "2.4 Interrupts and Interrupt Mapping" in Devicetree Specification v0.4.
`interrupt-names`	`string-array`	Optional names given to each interrupt generated by a device. The interrupts themselves are defined in either "interrupts" or "interrupts-extended" properties. For details, see "2.4 Interrupts and Interrupt Mapping" in Devicetree Specification v0.4.
`interrupt-parent`	`phandle`	If present, this refers to the node which handles interrupts generated by this device. For details, see "2.4 Interrupts and Interrupt Mapping" in Devicetree Specification v0.4.
`label`	`string`	Human readable string describing the device. Use of this property is deprecated except as needed on a case-by-case basis. For details, see "4.1.2 Miscellaneous Properties" in Devicetree Specification v0.4. See Important properties for more information.
`clocks`	`phandle-array`	Information about the device's clock providers. In general, this property should follow conventions established in the dt-schema binding: https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/clock/clock.yaml
`clock-names`	`string-array`	Optional names given to each clock provider in the "clocks" property.
`#address-cells`	`int`	This property encodes the number of <u32> cells used by address fields in "reg" properties in this node's children. For details, see "2.3.5 #address-cells and #size-cells" in Devicetree Specification v0.4.
`#size-cells`	`int`	This property encodes the number of <u32> cells used by size fields in "reg" properties in this node's children. For details, see "2.3.5 #address-cells and #size-cells" in Devicetree Specification v0.4.
`dmas`	`phandle-array`	DMA channel specifiers relevant to the device.
`dma-names`	`string-array`	Optional names given to the DMA channel specifiers in the "dmas" property.
`io-channels`	`phandle-array`	IO channel specifiers relevant to the device.
`io-channel-names`	`string-array`	Optional names given to the IO channel specifiers in the "io-channels" property.
`mboxes`	`phandle-array`	Mailbox / IPM channel specifiers relevant to the device.
`mbox-names`	`string-array`	Optional names given to the mbox specifiers in the "mboxes" property.
`power-domains`	`phandle-array`	Power domain specifiers relevant to the device.
`power-domain-names`	`string-array`	Optional names given to the power domain specifiers in the "power-domains" property.
`#power-domain-cells`	`int`	Number of cells in power-domains property
`zephyr,deferred-init`	`boolean`	Do not initialize device automatically on boot. Device should be manually initialized using device_init().
`wakeup-source`	`boolean`	Property to identify that a device can be used as wake up source. When this property is provided a specific flag is set into the device that tells the system that the device is capable of wake up the system. Wake up capable devices are disabled (interruptions will not wake up the system) by default but they can be enabled at runtime if necessary.
`zephyr,pm-device-runtime-auto`	`boolean`	Automatically configure the device for runtime power management after the init function runs.
`zephyr,disabling-power-states`	`phandles`	List of power states that will disable this device power.