From c8e6e06edec287ef7fd9b034d93be51e27497853 Mon Sep 17 00:00:00 2001 From: Hugo Villeneuve Date: Tue, 7 Nov 2023 10:50:40 -0500 Subject: [PATCH] arm64: dts: imx8mn-var-som-symphony: add vcc supply for PCA9534 The following warning is shown when probing device: pca953x 1-0020: supply vcc not found, using dummy regulator Define a new fixed 3.3v regulator for carrier board peripherals, enabled by mosfet switch Q2 after the SOM_3V3 supply rises (no software control). Add this new regulator as vcc supply to the PCA9534 to silence the warning. Signed-off-by: Hugo Villeneuve Signed-off-by: Shawn Guo --- .../boot/dts/freescale/imx8mn-var-som-symphony.dts | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts index a7a57442cb81..a6b94d1957c9 100644 --- a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts +++ b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts @@ -57,6 +57,15 @@ linux,default-trigger = "heartbeat"; }; }; + + /* Peripherals supply, enabled by Q2 after SOM_3V3 rises. */ + reg_per_3v3: regulator-peripheral-3v3 { + compatible = "regulator-fixed"; + regulator-name = "per_3v3"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-always-on; + }; }; ðphy { @@ -79,6 +88,7 @@ interrupts = <7 IRQ_TYPE_EDGE_FALLING>; #gpio-cells = <2>; wakeup-source; + vcc-supply = <®_per_3v3>; /* USB 3.0 OTG (usbotg1) / SATA port switch, set to USB 3.0 */ usb3-sata-sel-hog {