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From 9a7d42b76d21916d2eef2dfd6d61a7bdde97fb2b Mon Sep 17 00:00:00 2001
From: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Date: Fri, 12 Jan 2024 16:12:14 +0100
Subject: [PATCH v1 2/4] arm64: dts: freescale: imx8mp-verdin-dahlia: support
sleep-moci
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 two new
regulators for the USB hub and PCIe that can be turned off when the
system is suspended.
Upstream-Status: Submitted [https://lore.kernel.org/linux-devicetree/20240405160720.5977-1-eichest@gmail.com/]
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
---
.../dts/freescale/imx8mp-verdin-dahlia.dtsi | 44 +++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
index e68e0e6f21e9..abad1887040a 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
@@ -32,6 +32,25 @@ simple-audio-card,cpu {
sound-dai = <&sai1>;
};
};
+
+ reg_usb_hub: regulator-usb-hub {
+ compatible = "regulator-fixed";
+ enable-active-high;
+ /* Verdin CTRL_SLEEP_MOCI# (SODIMM 256) */
+ gpio = <&gpio4 29 GPIO_ACTIVE_HIGH>;
+ regulator-boot-on;
+ regulator-name = "HUB_PWR_EN";
+ };
+
+ reg_pcie: regulator-pcie {
+ compatible = "regulator-fixed";
+ enable-active-high;
+ /* Verdin CTRL_SLEEP_MOCI# (SODIMM 256) */
+ gpio = <&gpio4 29 GPIO_ACTIVE_HIGH>;
+ regulator-boot-on;
+ regulator-name = "PCIE_1_PWR_EN";
+ startup-delay-us = <100000>;
+ };
};
&backlight {
@@ -117,6 +136,7 @@ wm8904_1a: audio-codec@1a {
/* Verdin PCIE_1 */
&pcie {
+ vpcie-supply = <®_pcie>;
status = "okay";
};
@@ -143,6 +163,11 @@ ®_usdhc2_vmmc {
vin-supply = <®_3p3v>;
};
+/* We support turning off sleep moci on Dahlia */
+®_force_sleep_moci {
+ status = "disabled";
+};
+
/* Verdin I2S_1 */
&sai1 {
assigned-clocks = <&clk IMX8MP_CLK_SAI1>;
@@ -186,6 +211,25 @@ &usb3_phy1 {
status = "okay";
};
+&usb_dwc3_1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ usb_hub_3_0: usb-hub@1 {
+ compatible = "usb424,5744";
+ reg = <1>;
+ peer-hub = <&usb_hub_2_0>;
+ vdd-supply = <®_usb_hub>;
+ };
+
+ usb_hub_2_0: usb-hub@2 {
+ compatible = "usb424,2744";
+ reg = <2>;
+ peer-hub = <&usb_hub_3_0>;
+ vdd-supply = <®_usb_hub>;
+ };
+};
+
/* Verdin SD_1 */
&usdhc2 {
status = "okay";
--
2.40.1
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