linux-kernel - [PATCH v1 4/4] arm64: dts: freescale: imx8mm-verdin-dahlia: support sleep-moci

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Message-Id: <20240405160720.5977-5-eichest@gmail.com>
Date: Fri,  5 Apr 2024 18:07:20 +0200
From: Stefan Eichenberger <eichest@...il.com>
To: robh@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	francesco.dolcini@...adex.com
Cc: devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Stefan Eichenberger <stefan.eichenberger@...adex.com>
Subject: [PATCH v1 4/4] arm64: dts: freescale: imx8mm-verdin-dahlia: support sleep-moci

From: Stefan Eichenberger <stefan.eichenberger@...adex.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 two new
regulators for the USB hub and PCIe that can be turned off when the
system is suspended.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@...adex.com>
---
 .../dts/freescale/imx8mm-verdin-dahlia.dtsi   | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-dahlia.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dahlia.dtsi
index b64dac4f29c2..393fc9e20423 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-verdin-dahlia.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-dahlia.dtsi
@@ -32,6 +32,25 @@ simple-audio-card,cpu {
 			sound-dai = <&sai2>;
 		};
 	};
+
+	reg_usb_hub: regulator-usb-hub {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		/* Verdin CTRL_SLEEP_MOCI# (SODIMM 256) */
+		gpio = <&gpio5 1 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 = <&gpio5 1 GPIO_ACTIVE_HIGH>;
+		regulator-boot-on;
+		regulator-name = "PCIE_1_PWR_EN";
+		startup-delay-us = <100000>;
+	};
 };
 
 /* Verdin SPI_1 */
@@ -98,6 +117,7 @@ wm8904_1a: audio-codec@1a {
 
 /* Verdin PCIE_1 */
 &pcie0 {
+	vpcie-supply = <&reg_pcie>;
 	status = "okay";
 };
 
@@ -120,6 +140,11 @@ &pwm3 {
 	status = "okay";
 };
 
+/* We support turning off sleep moci on Dahlia */
+&reg_force_sleep_moci {
+	status = "disabled";
+};
+
 /* Verdin I2S_1 */
 &sai2 {
 	status = "okay";
@@ -148,8 +173,16 @@ &usbotg1 {
 
 /* Verdin USB_2 */
 &usbotg2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
 	disable-over-current;
 	status = "okay";
+
+	usb-hub@1 {
+		compatible = "usb424,2744";
+		reg = <1>;
+		vdd-supply = <&reg_usb_hub>;
+	};
 };
 
 /* Verdin SD_1 */
-- 
2.40.1