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- Generic SYSCON mapped register reset driver
- This is a generic reset driver using syscon to map the reset register.
- The reset is generally performed with a write to the reset register
- defined by the register map pointed by syscon reference plus the offset and
- shifted by the reset specifier/
- To assert a reset on some device, the equivalent of the following operation is
- performed, where reset_id is the reset specifier from the device's resets
- property.
- if (BIT(reset_id) & mask)
- regmap[offset][reset_id] = assert-high;
- Required properties:
- - compatible: should contain "syscon-reset"
- - #reset-cells: must be 1
- - regmap: this is phandle to the register map node
- - offset: offset in the register map for the reboot register (in bytes)
- Optional properties:
- - mask: accept only the reset specifiers defined by the mask (32 bit)
- - assert-high: Bit to write when asserting a reset. Defaults to 1.
- Default will be little endian mode, 32 bit access only.
- Example:
- reset-controller {
- compatible = "syscon-reset";
- #reset-cells = <1>;
- regmap = <&sysctl>;
- offset = <0x20>;
- mask = <0x27FFFFFF>;
- assert-high = <0>;
- };
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