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Commit 3e7db1c1 authored by Martin Blumenstingl's avatar Martin Blumenstingl Committed by Kevin Hilman
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ARM: dts: meson8b: ec100: improve the description of the regulators 



USB_VBUS is a controlled by a Silergy SY6288CCAC-GP 2A Power
Distribution Switch. The name of it's enable GPIO signal is USB_PWR_EN.

VCC5V is supplied by the main power input called PWR_5V_STB. The name of
it's enable GPIO signal is 3V3_5V_EN.

VCC3V3, VCC_DDR3_1V5 and VCCK (the CPU power supply) each use a separate
Silergy SY8089AAC-GP 2A step down regulator. They are all supplied by the
board's main 5V. VCC3V3 and VCC_DDR3_1V5 are fixed regulators while the
voltage of VCCK can be changed by changing it's feedback voltage via
PWM_C.

VCC1V8 is an ABLIC S-1339D18-M5001-GP fixed voltage regulator which is
supplied by VCC3V3.

VCC_RTC is a Global Mixed-mode Technology Inc. G918T12U-GP LDO which. It
is supplied by either VCC3V3 (when the board is powered) or the RTC coin
cell battery.

Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: default avatarKevin Hilman <khilman@baylibre.com>
parent b7d10841

arch/arm/boot/dts/meson8b-ec100.dts

+68 −0
Original line number Diff line number Diff line
@@ -88,6 +88,9 @@ 
	};



	usb_vbus: regulator-usb-vbus {

		/*

		 * Silergy SY6288CCAC-GP 2A Power Distribution Switch.

		 */

		compatible = "regulator-fixed";



		regulator-name = "USB_VBUS";
@@ -95,11 +98,20 @@ 
		regulator-min-microvolt = <5000000>;

		regulator-max-microvolt = <5000000>;



		vin-supply = <&vcc_5v>;



		/*

		 * signal name from the schematics: USB_PWR_EN

		 */

		gpio = <&gpio_ao GPIOAO_5 GPIO_ACTIVE_HIGH>;

		enable-active-high;

	};



	vcc_5v: regulator-vcc5v {

		/*

		 * supplied by the main power input which called PWR_5V_STB

		 * in the schematics

		 */

		compatible = "regulator-fixed";



		regulator-name = "VCC5V";
@@ -107,6 +119,9 @@ 
		regulator-min-microvolt = <5000000>;

		regulator-max-microvolt = <5000000>;



		/*

		 * signal name from the schematics: 3V3_5V_EN

		 */

		gpio = <&gpio GPIODV_29 GPIO_ACTIVE_LOW>;



		regulator-boot-on;
@@ -114,12 +129,18 @@ 
	};



	vcck: regulator-vcck {

		/*

		 * Silergy SY8089AAC-GP 2A continuous, 3A peak, 1MHz

		 * Synchronous Step Down Regulator.

		 */

		compatible = "pwm-regulator";



		regulator-name = "VCCK";

		regulator-min-microvolt = <860000>;

		regulator-max-microvolt = <1140000>;



		vin-supply = <&vcc_5v>;



		pwms = <&pwm_cd 0 1148 0>;

		pwm-dutycycle-range = <100 0>;
@@ -128,19 +149,66 @@ 
	};



	vcc_1v8: regulator-vcc1v8 {

		/*

		 * ABLIC S-1339D18-M5001-GP

		 */

		compatible = "regulator-fixed";



		regulator-name = "VCC1V8";

		regulator-min-microvolt = <1800000>;

		regulator-max-microvolt = <1800000>;



		vin-supply = <&vcc_3v3>;

	};



	vcc_3v3: regulator-vcc3v3 {

		/*

		 * Silergy SY8089AAC-GP 2A continuous, 3A peak, 1MHz

		 * Synchronous Step Down Regulator. Also called

		 * VDDIO_AO3.3V in the schematics.

		 */

		compatible = "regulator-fixed";



		regulator-name = "VCC3V3";

		regulator-min-microvolt = <3300000>;

		regulator-max-microvolt = <3300000>;



		vin-supply = <&vcc_5v>;

	};



	vcc_ddr3: regulator-vcc-ddr3 {

		/*

		 * Silergy SY8089AAC-GP 2A continuous, 3A peak, 1MHz

		 * Synchronous Step Down Regulator. Also called

		 * DDR3_1.5V in the schematics.

		 */

		compatible = "regulator-fixed";



		regulator-name = "VCC_DDR3_1V5";

		regulator-min-microvolt = <1500000>;

		regulator-max-microvolt = <1500000>;



		vin-supply = <&vcc_5v>;



		regulator-boot-on;

		regulator-always-on;

	};



	vcc_rtc: regulator-vcc-rtc {

		/*

		 * Global Mixed-mode Technology Inc. G918T12U-GP

		 */

		compatible = "regulator-fixed";



		regulator-name = "VCC_RTC";

		regulator-min-microvolt = <900000>;

		regulator-max-microvolt = <900000>;



		/*

		 * When the board is powered then the input is VCC3V3,

		 * otherwise power is taken from the coin cell battery.

		 */

		vin-supply = <&vcc_3v3>;

	};

};