ARM: dts: sun8i: h2+: add SY8113B regulator used by Orange Pi Zero board

Orange Pi Zero board has a SY8113B regulator, which is controlled via
GPIO and capable of outputing 1.1V when the PL6 GPIO is set to output 0
or 1.3V when the PL6 GPIO is set to input or output 1, and the output is
the power supply of the ARM cores in H2+ SoC.

Add the device tree node of this regulator and set the cpu's cpu-supply
property to it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
[wens@csie.org: rename regulator node name and label]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

diff --git a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
index 0bc031f..84cd9c0 100644 (file)
--- a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
+++ b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
@@ -89,6 +89,23 @@
                gpio = <&pio 0 20 GPIO_ACTIVE_HIGH>;
        };
 
+       reg_vdd_cpux: vdd-cpux-regulator {
+               compatible = "regulator-gpio";
+               regulator-name = "vdd-cpux";
+               regulator-type = "voltage";
+               regulator-boot-on;
+               regulator-always-on;
+               regulator-min-microvolt = <1100000>;
+               regulator-max-microvolt = <1300000>;
+               regulator-ramp-delay = <50>; /* 4ms */
+
+               gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
+               enable-active-high;
+               gpios-states = <1>;
+               states = <1100000 0
+                         1300000 1>;
+       };
+
        wifi_pwrseq: wifi_pwrseq {
                compatible = "mmc-pwrseq-simple";
                reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>;
@@ -96,6 +113,10 @@
        };
 };
 
+&cpu0 {
+       cpu-supply = <&reg_vdd_cpux>;
+};
+
 &ehci0 {
        status = "okay";
 };