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arm64: dts: imx8mn-var-som-symphony: add vcc supply for PCA9534

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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>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Hugo Villeneuve
2023-11-07 10:50:40 -05:00
committed by Shawn Guo
parent 67275c2f3d
commit c8e6e06ede
1 changed files with 10 additions and 0 deletions
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10
arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts
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@@ -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;
};
};
&ethphy {
@@ -79,6 +88,7 @@ pca9534: gpio@20 {
interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
#gpio-cells = <2>;
wakeup-source;
vcc-supply = <&reg_per_3v3>;
/* USB 3.0 OTG (usbotg1) / SATA port switch, set to USB 3.0 */
usb3-sata-sel-hog {