linux-kernel - [PATCH v2 09/11] ARM: tegra: Use pwrseq-simple for the wifi in Nyan

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Date:	Thu, 15 Jan 2015 17:12:21 +0100
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	linux-tegra@...r.kernel.org
Cc:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Dylan Reid <dgreid@...omium.org>,
	Simon Glass <sjg@...omium.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 09/11] ARM: tegra: Use pwrseq-simple for the wifi in Nyan

The Nyan boards have a Marvell 88w8897 wifi card connected through SDIO
that need the reset line to be hold active for several milliseconds.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
---
 arch/arm/boot/dts/tegra124-nyan.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/tegra124-nyan.dtsi b/arch/arm/boot/dts/tegra124-nyan.dtsi
index 25bbcbe..dbaf261f 100644
--- a/arch/arm/boot/dts/tegra124-nyan.dtsi
+++ b/arch/arm/boot/dts/tegra124-nyan.dtsi
@@ -365,11 +365,19 @@
 		status = "okay";
 	};
 
+	sdhci0_pwrseq: sdhci0_pwrseq {
+		compatible = "mmc,pwrseq-simple";
+
+                reset-gpios = <&gpio TEGRA_GPIO(X, 7) GPIO_ACTIVE_LOW>;
+                delay = <20>; /* ms */
+	};
+
 	sdhci@0,700b0000 { /* WiFi/BT on this bus */
 		status = "okay";
 		bus-width = <4>;
 		no-1-8-v;
 		non-removable;
+		mmc-pwrseq = <&sdhci0_pwrseq>;
 	};
 
 	sdhci@0,700b0400 { /* SD Card on this bus */
-- 
1.9.3

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