From patchwork Wed Jan 28 10:10:19 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martinez Canillas X-Patchwork-Id: 5727771 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id DA4269F1D6 for ; Wed, 28 Jan 2015 10:13:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 181C32027D for ; Wed, 28 Jan 2015 10:13:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 08AF420270 for ; Wed, 28 Jan 2015 10:13:37 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YGPbQ-0004Sp-41; Wed, 28 Jan 2015 10:12:04 +0000 Received: from bhuna.collabora.co.uk ([93.93.135.160]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YGPaj-0003KK-9g for linux-arm-kernel@lists.infradead.org; Wed, 28 Jan 2015 10:11:21 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: javier) with ESMTPSA id F38CD600EB9 From: Javier Martinez Canillas To: Ulf Hansson Subject: [PATCH 5/5] ARM: dts: exynos5250-snow: Enable wifi power-on Date: Wed, 28 Jan 2015 11:10:19 +0100 Message-Id: <1422439819-29854-6-git-send-email-javier.martinez@collabora.co.uk> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> References: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150128_021121_516321_33EAC76E X-CRM114-Status: UNSURE ( 8.69 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-mmc@vger.kernel.org, Doug Anderson , linux-kernel@vger.kernel.org, Kukjin Kim , Olof Johansson , Javier Martinez Canillas , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Snow board has a MMC/SDIO wifi chip that is always powered but it needs a power sequence involving a reset (active low) and an enable (active high) pins. Both pins are marked as active low since the MMC simple power sequence driver asserts the pins prior to the card power up procedure and de-asserts the pins after the card has been powered. So the reset line will be left de-asserted and the enable pin will be left asserted. The chip also needs an external 32kHz reference clock to be operational that is by the MAX77686 PMIC clock. Add a simple MMC power sequence provider for the wifi MMC/SDIO slot. Signed-off-by: Javier Martinez Canillas --- arch/arm/boot/dts/exynos5250-snow.dts | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts index b9aeec430527..0f7971ba8238 100644 --- a/arch/arm/boot/dts/exynos5250-snow.dts +++ b/arch/arm/boot/dts/exynos5250-snow.dts @@ -229,6 +229,13 @@ power-supply = <&fet6>; backlight = <&backlight>; }; + + mmc3_pwrseq: mmc3_pwrseq { + reset-gpios = <&gpx0 2 GPIO_ACTIVE_LOW>, /* WIFI_RSTn */ + <&gpx0 1 GPIO_ACTIVE_LOW>; /* WIFI_EN */ + clocks = <&max77686 MAX77686_CLK_PMIC>; + clock-names = "ext_clock"; + }; }; &dp { @@ -531,17 +538,33 @@ status = "okay"; num-slots = <1>; broken-cd; + cap-sdio-irq; card-detect-delay = <200>; samsung,dw-mshc-ciu-div = <3>; samsung,dw-mshc-sdr-timing = <2 3>; samsung,dw-mshc-ddr-timing = <1 2>; pinctrl-names = "default"; - pinctrl-0 = <&sd3_clk &sd3_cmd &sd3_bus4>; + pinctrl-0 = <&sd3_clk &sd3_cmd &sd3_bus4 &wifi_en &wifi_rst>; bus-width = <4>; cap-sd-highspeed; + mmc-pwrseq = <&mmc3_pwrseq>; }; &pinctrl_0 { + wifi_en: wifi-en { + samsung,pins = "gpx0-1"; + samsung,pin-function = <1>; + samsung,pin-pud = <0>; + samsung,pin-drv = <0>; + }; + + wifi_rst: wifi-rst { + samsung,pins = "gpx0-2"; + samsung,pin-function = <1>; + samsung,pin-pud = <0>; + samsung,pin-drv = <0>; + }; + power_key_irq: power-key-irq { samsung,pins = "gpx1-3"; samsung,pin-function = <0xf>;