linux-kernel - [PATCH v3 7/8] ARM: dts: microchip: sama5d2_icp: Add power-supply property for sdmmc0 node

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Message-ID: <20240206120322.88907-8-mihai.sain@microchip.com>
Date: Tue, 6 Feb 2024 14:03:21 +0200
From: Mihai Sain <mihai.sain@...rochip.com>
To: <claudiu.beznea@...on.dev>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
	<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC: Mihai Sain <mihai.sain@...rochip.com>
Subject: [PATCH v3 7/8] ARM: dts: microchip: sama5d2_icp: Add power-supply property for sdmmc0 node

The sdmmc0 controller is powered from 3.3V regulator.
Add vmmc-supply and vqmmc-supply properties to sdmmc0 node.
The sdmmc controller from SAMA5D2 MPU has support for
IO voltage signaling/switching required by the UHS sd-card.
In order to avoid the issues from the tuning procedure required by
the UHS cards, keep the vqmmc at 3V3 to use the sd high-speed mode.

Signed-off-by: Mihai Sain <mihai.sain@...rochip.com>
---
 arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts b/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts
index 999adeca6f33..adcb3240e5f5 100644
--- a/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama5d2_icp.dts
@@ -712,6 +712,8 @@ &sdmmc0 {
 	bus-width = <4>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sdmmc0_default>;
+	vmmc-supply = <&vdd_io_reg>;	// 3.3V
+	vqmmc-supply = <&vdd_io_reg>;	// 3.3V
 	status = "okay";
 };
 
-- 
2.43.0