diff mbox series

[v1,2/2] arm64: dts: ti: k3-am62-verdin-dahlia: support sleep-moci

Message ID 20240301084901.16656-3-eichest@gmail.com (mailing list archive)
State New, archived
Headers show
Series arm64: dts: ti: k3-am62-verdin: add sleep-moci support | expand

Commit Message

Stefan Eichenberger March 1, 2024, 8:49 a.m. UTC 
From: Stefan Eichenberger <stefan.eichenberger@toradex.com>

Previously, we had the sleep-moci pin set to always on. However, the
Dahlia carrier board supports disabling the sleep-moci when the system
is suspended to power down peripherals that support it. This reduces
overall power consumption. This commit adds support for this feature by
disabling the reg_force_sleep_moci regulator and adding a new regulator
for the USB hub that can be turned off when the system is suspended.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
---
 .../boot/dts/ti/k3-am62-verdin-dahlia.dtsi    | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

Comments

Francesco Dolcini March 1, 2024, 9 a.m. UTC | #1 
On Fri, Mar 01, 2024 at 09:49:01AM +0100, Stefan Eichenberger wrote:
> From: Stefan Eichenberger <stefan.eichenberger@toradex.com>
> 
> Previously, we had the sleep-moci pin set to always on. However, the
> Dahlia carrier board supports disabling the sleep-moci when the system
> is suspended to power down peripherals that support it. This reduces
> overall power consumption. This commit adds support for this feature by
> disabling the reg_force_sleep_moci regulator and adding a new regulator
> for the USB hub that can be turned off when the system is suspended.
> 
> Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>

Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi
index bf6d27e70bc4..bb066e726527 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-verdin-dahlia.dtsi
@@ -43,6 +43,15 @@  simple-audio-card,cpu {
 			sound-dai = <&mcasp0>;
 		};
 	};
+
+	reg_usb_hub: regulator-usb-hub {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		/* Verdin CTRL_SLEEP_MOCI# (SODIMM 256) */
+		gpio = <&main_gpio0 31 GPIO_ACTIVE_HIGH>;
+		regulator-boot-on;
+		regulator-name = "HUB_PWR_EN";
+	};
 };
 
 /* Verdin ETHs */
@@ -183,6 +192,11 @@  &ospi0 {
 	status = "okay";
 };
 
+/* Do not force CTRL_SLEEP_MOCI# always enabled */
+&reg_force_sleep_moci {
+	status = "disabled";
+};
+
 /* Verdin SD_1 */
 &sdhci1 {
 	ti,driver-strength-ohm = <33>;
@@ -204,7 +218,15 @@  &usbss1 {
 };
 
 &usb1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
 	status = "okay";
+
+	usb-hub@1 {
+		compatible = "usb424,2744";
+		reg = <1>;
+		vdd-supply = <&reg_usb_hub>;
+	};
 };
 
 /* Verdin CTRL_WAKE1_MICO# */