D23004.diff
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	Index: head/sys/arm64/rockchip/rk805.c
	===================================================================
	--- head/sys/arm64/rockchip/rk805.c
	+++ head/sys/arm64/rockchip/rk805.c
	@@ -204,6 +204,7 @@
	.voltage_nstep = 64,
	},
	{
	+ /* BUCK3 voltage is calculated based on external resistor */
	.id = RK805_DCDC3,
	.name = "DCDC_REG3",
	.enable_reg = RK805_DCDC_EN,
	@@ -322,12 +323,16 @@
	.name = "SWITCH_REG1",
	.enable_reg = RK805_DCDC_EN,
	.enable_mask = 0x20,
	+ .voltage_min = 3000000,
	+ .voltage_max = 3000000,
	},
	{
	.id = RK808_SWITCH2,
	.name = "SWITCH_REG2",
	.enable_reg = RK805_DCDC_EN,
	.enable_mask = 0x40,
	+ .voltage_min = 3000000,
	+ .voltage_max = 3000000,
	},
	};

	@@ -449,6 +454,11 @@
	uint8_t val;

	sc = regnode_get_softc(regnode);
	+
	+ if (sc->def->voltage_min == sc->def->voltage_max) {
	+ *uvolt = sc->def->voltage_min;
	+ return (0);
	+ }

	if (!sc->def->voltage_step)
	return (ENXIO);