Messages in this thread Patch in this message | | | From | Hugo Villeneuve <> | Date | Tue, 7 Nov 2023 10:50:40 -0500 | Subject | [PATCH v2] arm64: dts: imx8mn-var-som-symphony: add vcc supply for PCA9534 |
| |
From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
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 <hvilleneuve@dimonoff.com> --- Changes for V2: - add peripherals regulator and update commit message for Q2 mosfet.
.../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 @@ led { 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 @@ pca9534: gpio@20 { 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 { base-commit: be3ca57cfb777ad820c6659d52e60bbdd36bf5ff -- 2.39.2
| |