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ARM: dts: meson8b: ec100: improve the description of the regulators

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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: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Martin Blumenstingl 2019-01-19 00:43:38 +01:00 committed by Kevin Hilman
parent b7d10841e5
commit 3e7db1c1b7
1 changed files with 68 additions and 0 deletions
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68
arch/arm/boot/dts/meson8b-ec100.dts
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@ -88,6 +88,9 @@ power {
};
usb_vbus: regulator-usb-vbus {
/*
* Silergy SY6288CCAC-GP 2A Power Distribution Switch.
*/
compatible = "regulator-fixed";
regulator-name = "USB_VBUS";
@ -95,11 +98,20 @@ usb_vbus: regulator-usb-vbus {
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 @@ vcc_5v: regulator-vcc5v {
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 @@ vcc_5v: regulator-vcc5v {
};
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 @@ vcck: regulator-vcck {
};
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>;
};
};