@@ -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>;
};
};
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> --- arch/arm/boot/dts/meson8b-ec100.dts | 68 +++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+)