linux-kernel - [PATCH v1 02/10] ARM: tegra: acer-a500: Specify proper voltage for WiFi SDIO bus

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Date:   Mon, 10 May 2021 23:25:52 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Agneli <poczt@...tonmail.ch>, Paul Fertser <fercerpav@...il.com>,
        Svyatoslav Ryhel <clamor95@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 02/10] ARM: tegra: acer-a500: Specify proper voltage for WiFi SDIO bus

Tegra20 has v2.00 SDMMC controller which doesn't support voltage
switching and the WiFi SDIO bus voltage is fixed to 1.8v in accordance
to the board's schematics, while MMC core confusingly saying that it's
3.3v because of the v2.00. Let's correct the voltage in the device-tree
just for consistency. This is a minor improvement which doesn't fix any
problems.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 arch/arm/boot/dts/tegra20-acer-a500-picasso.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts b/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts
index d7d97b7e4794..eff9bfb2d442 100644
--- a/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts
+++ b/arch/arm/boot/dts/tegra20-acer-a500-picasso.dts
@@ -762,7 +762,7 @@ sdmmc1: mmc@...00000 {
 
 		mmc-pwrseq = <&brcm_wifi_pwrseq>;
 		vmmc-supply = <&vdd_3v3_sys>;
-		vqmmc-supply = <&vdd_3v3_sys>;
+		vqmmc-supply = <&vdd_1v8_sys>;
 
 		/* Azurewave AW-NH611 BCM4329 */
 		wifi@1 {
-- 
2.30.2