[v2] arm64: dts: imx8mn-var-som-symphony: add vcc supply for PCA9534
Commit Message
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(+)
base-commit: be3ca57cfb777ad820c6659d52e60bbdd36bf5ff
Comments
On Tue, Nov 07, 2023 at 10:50:40AM -0500, Hugo Villeneuve wrote:
> 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>
Applied, thanks!
@@ -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 {