linux-kernel - [PATCH] ARM: tegra: roth: Add MMC pwrseq to power wifi on

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Date:	Mon, 8 Jun 2015 16:41:32 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>,
	Stephen Warren <swarren@...dotorg.org>
CC:	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org, gnurou@...il.com,
	Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH] ARM: tegra: roth: Add MMC pwrseq to power wifi on

The wifi chip on roth needs to have its reset deasserted in order to be
probed. Add a mmc-pwrseq-simple to allow this to happen and get wifi
working at boot time.

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
 arch/arm/boot/dts/tegra114-roth.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/tegra114-roth.dts b/arch/arm/boot/dts/tegra114-roth.dts
index ea1772a686c2..04762532a178 100644
--- a/arch/arm/boot/dts/tegra114-roth.dts
+++ b/arch/arm/boot/dts/tegra114-roth.dts
@@ -972,6 +972,11 @@
 		nvidia,invert-interrupt;
 	};
 
+	sdhci0_pwrseq: sdhci0_pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio TEGRA_GPIO(CC, 5) GPIO_ACTIVE_LOW>;
+	};
+
 	/* Wifi */
 	sdhci@...00000 {
 		status = "okay";
@@ -979,6 +984,7 @@
 		broken-cd;
 		keep-power-in-suspend;
 		cap-sdio-irq;
+		mmc-pwrseq = <&sdhci0_pwrseq>;
 	};
 
 	/* SD card */
-- 
2.4.2

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