Received-SPF: pass (google.com: domain of linux-kernel+bounces-54855-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
From: Mihai Sain <mihai.sain@microchip.com>
To: <claudiu.beznea@tuxon.dev>, <robh+dt@kernel.org>,
	<krzysztof.kozlowski+dt@linaro.org>, <conor+dt@kernel.org>,
	<nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
	<devicetree@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>
CC: Mihai Sain <mihai.sain@microchip.com>
Subject: [PATCH v3 7/8] ARM: dts: microchip: sama5d2_icp: Add power-supply property for sdmmc0 node
Date: Tue, 6 Feb 2024 14:03:21 +0200
Message-ID: <20240206120322.88907-8-mihai.sain@microchip.com>
In-Reply-To: <20240206120322.88907-1-mihai.sain@microchip.com>
References: <20240206120322.88907-1-mihai.sain@microchip.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain

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@microchip.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