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[v3,2/2] ARM: dts: stm32: prtt1c: Add PoDL PSE regulator nodes

Message ID 20230531102113.3353065-3-o.rempel@pengutronix.de (mailing list archive)
State Not Applicable
Headers show
Series Extend dt-bindings for PSE-PD controllers and update prtt1c dts | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Oleksij Rempel May 31, 2023, 10:21 a.m. UTC
This commit introduces Power over Data Line (PoDL) Power Source
Equipment (PSE) regulator nodes to the PRTT1C devicetree. The addition
of these nodes enables support for PoDL in PRTT1C devices, allowing
power delivery and data transmission over a single twisted pair.

The new PoDL PSE regulator nodes provide voltage capability information
of the current board design, which can be used as a hint for system
administrators when configuring and managing power settings. This update
enhances the versatility and simplifies the power management of PRTT1C
devices while ensuring compatibility with connected Powered Devices
(PDs).

After applying this patch, the power delivery can be controlled from
user space with a patched [1] ethtool version using the following commands:
  ethtool --set-pse t1l2 podl-pse-admin-control enable
to enable power delivery, and
  ethtool --show-pse t1l2
to display the PoDL PSE settings.

By integrating PoDL PSE support into the PRTT1C devicetree, users can
benefit from streamlined power and data connections in their
deployments, improving overall system efficiency and reducing cabling
complexity.

[1] https://lore.kernel.org/all/20230317093024.1051999-1-o.rempel@pengutronix.de/

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 arch/arm/boot/dts/stm32mp151a-prtt1c.dts | 32 ++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/stm32mp151a-prtt1c.dts b/arch/arm/boot/dts/stm32mp151a-prtt1c.dts
index 58bb05a8c685..ca0d3329cfd7 100644
--- a/arch/arm/boot/dts/stm32mp151a-prtt1c.dts
+++ b/arch/arm/boot/dts/stm32mp151a-prtt1c.dts
@@ -23,6 +23,18 @@  clock_sja1105: clock-sja1105 {
 		clock-frequency = <25000000>;
 	};
 
+	pse_t1l1: ethernet-pse-1 {
+		compatible = "podl-pse-regulator";
+		pse-supply = <&reg_t1l1>;
+		#pse-cells = <0>;
+	};
+
+	pse_t1l2: ethernet-pse-2 {
+		compatible = "podl-pse-regulator";
+		pse-supply = <&reg_t1l2>;
+		#pse-cells = <0>;
+	};
+
 	mdio0: mdio {
 		compatible = "virtual,mdio-gpio";
 		#address-cells = <1>;
@@ -32,6 +44,24 @@  mdio0: mdio {
 
 	};
 
+	reg_t1l1: regulator-pse-t1l1 {
+		compatible = "regulator-fixed";
+		regulator-name = "pse-t1l1";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		gpio = <&gpiog 13 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	reg_t1l2: regulator-pse-t1l2 {
+		compatible = "regulator-fixed";
+		regulator-name = "pse-t1l2";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		gpio = <&gpiog 14 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	wifi_pwrseq: wifi-pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&gpiod 8 GPIO_ACTIVE_LOW>;
@@ -92,6 +122,7 @@  t1l1_phy: ethernet-phy@7 {
 		reset-gpios = <&gpiog 12 GPIO_ACTIVE_LOW>;
 		reset-assert-us = <10>;
 		reset-deassert-us = <35>;
+		pses = <&pse_t1l1>;
 	};
 
 	/* TI DP83TD510E */
@@ -102,6 +133,7 @@  t1l2_phy: ethernet-phy@10 {
 		reset-gpios = <&gpiog 11 GPIO_ACTIVE_LOW>;
 		reset-assert-us = <10>;
 		reset-deassert-us = <35>;
+		pses = <&pse_t1l2>;
 	};
 
 	/* Micrel KSZ9031 */