arm64: dts: ti: k3-am654-base-board: Add VTT GPIO regulator for DDR

Hold the DDR vtt regulator active for functionality.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Kamlesh Gurudasani <kamlesh@ti.com>
Link: https://lore.kernel.org/r/20230419225913.663448-4-nm@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
index 01c0f06..30bb1c9 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
@@ -116,6 +116,20 @@
                vin-supply = <&vcc3v3_io>;
                gpio = <&pca9554 4 GPIO_ACTIVE_HIGH>;
        };
+
+       vtt_supply: regulator-3 {
+               compatible = "regulator-fixed";
+               regulator-name = "vtt";
+               pinctrl-names = "default";
+               pinctrl-0 = <&ddr_vtt_pins_default>;
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+               enable-active-high;
+               regulator-always-on;
+               regulator-boot-on;
+               vin-supply = <&vcc3v3_io>;
+               gpio = <&wkup_gpio0 28 GPIO_ACTIVE_HIGH>;
+       };
 };
 
 &wkup_pmx0 {
@@ -128,6 +142,12 @@
                >;
        };
 
+       ddr_vtt_pins_default: ddr-vtt-pins-default {
+               pinctrl-single,pins = <
+                       AM65X_WKUP_IOPAD(0x0040, PIN_OUTPUT_PULLUP, 7)  /* WKUP_GPIO0_28 */
+               >;
+       };
+
        wkup_i2c0_pins_default: wkup-i2c0-pins-default {
                pinctrl-single,pins = <
                        AM65X_WKUP_IOPAD(0x00e0, PIN_INPUT, 0) /* (AC7) WKUP_I2C0_SCL */