arm64: dts: ti: k3-am642-evm: Add VTT GPIO regulator for DDR

Hold the DDR vtt regulator active for functionality.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230414073328.381336-10-nm@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 9cf181d..3d0b473 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -148,6 +148,20 @@
                regulator-boot-on;
        };
 
+       vtt_supply: regulator-5 {
+               compatible = "regulator-fixed";
+               regulator-name = "vtt";
+               pinctrl-names = "default";
+               pinctrl-0 = <&ddr_vtt_pins_default>;
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+               gpio = <&main_gpio0 12 GPIO_ACTIVE_HIGH>;
+               vin-supply = <&vsys_3v3>;
+               enable-active-high;
+               regulator-always-on;
+               regulator-boot-on;
+       };
+
        leds {
                compatible = "gpio-leds";
 
@@ -338,6 +352,12 @@
                        AM64X_IOPAD(0x0258, PIN_OUTPUT, 0) /* (C17) MCAN1_TX */
                >;
        };
+
+       ddr_vtt_pins_default: ddr-vtt-pins-default {
+               pinctrl-single,pins = <
+                       AM64X_IOPAD(0x0030, PIN_OUTPUT_PULLUP, 7) /* (L18) OSPI0_CSN1.GPIO0_12 */
+               >;
+       };
 };
 
 &main_uart0 {