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From: Stefan Eichenberger <eichest@gmail.com>
To: nm@ti.com, vigneshr@ti.com, kristo@kernel.org,
	robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
	conor+dt@kernel.org
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, francesco.dolcini@toradex.com,
	Stefan Eichenberger <stefan.eichenberger@toradex.com>
Subject: [PATCH v1 2/2] arm64: dts: ti: k3-am62-verdin-dahlia: support sleep-moci
Date: Fri,  1 Mar 2024 09:49:01 +0100	[thread overview]
Message-ID: <20240301084901.16656-3-eichest@gmail.com> (raw)
In-Reply-To: <20240301084901.16656-1-eichest@gmail.com>

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(+)

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# */
-- 
2.40.1


  parent reply	other threads:[~2024-03-01  8:49 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-01  8:48 [PATCH v1 0/2] arm64: dts: ti: k3-am62-verdin: add sleep-moci support Stefan Eichenberger
2024-03-01  8:49 ` [PATCH v1 1/2] arm64: dts: ti: k3-am62-verdin: replace sleep-moci hog with regulator Stefan Eichenberger
2024-03-01  9:00   ` Francesco Dolcini
2024-03-01  8:49 ` Stefan Eichenberger [this message]
2024-03-01  9:00   ` [PATCH v1 2/2] arm64: dts: ti: k3-am62-verdin-dahlia: support sleep-moci Francesco Dolcini
2024-04-17  7:53 ` [PATCH v1 0/2] arm64: dts: ti: k3-am62-verdin: add sleep-moci support Francesco Dolcini
2024-04-26 22:42 ` Nishanth Menon

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