From patchwork Tue Feb 7 19:22:09 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 9560935 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0DAF1602B1 for ; Tue, 7 Feb 2017 19:24:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F41E128481 for ; Tue, 7 Feb 2017 19:24:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E788728487; Tue, 7 Feb 2017 19:24:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, T_DKIM_INVALID autolearn=no version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 80F9A28481 for ; Tue, 7 Feb 2017 19:24:28 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cbBNL-000735-By; Tue, 07 Feb 2017 19:24:27 +0000 Received: from vern.gendns.com ([206.190.152.46]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cbBN1-0006Lm-Lz for linux-arm-kernel@lists.infradead.org; Tue, 07 Feb 2017 19:24:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lechnology.com; s=default; h=References:In-Reply-To:Message-Id:Date:Subject :Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=4truvRTFIIHt1wJoLTtYFRlexn+OqSpKnKJIdhFIbPA=; b=NTxtvCwP/PCOMe+2yR0WBdiWY UH9AvLLUj8KyNyzJV3JotaX0bl82IsusbECPpBPUwkCCld2xZXev4S+2LO4JEfxU2kq5Cbl0eb+tC nXEhhqZvNIycs92Y1T6lgemwhi/R9J2SYrjc8/cg/JXwmuAZgxCnBkPa4ckz/9/3MZvIP2jeLB3Ha nBLgC3vUC9dw7aT0WUvc1LzDZ55pZl+ymR2a1id7N9quNn4xH3wkXVzqCBd0W5ksPtvwgI06yvR8M aKG2/UmNEx0pmOyaN6zkNc7Ev3WYIF7MBQ90FqPwnRKHxUDnS9+2t9ZyhxwUS2Tq4jfltK0ivENDK CgiQhFLCw==; Received: from 108-198-5-147.lightspeed.okcbok.sbcglobal.net ([108.198.5.147]:53664 helo=freyr.lechnology.com) by vern.gendns.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-SHA256:128) (Exim 4.87) (envelope-from ) id 1cbBLf-002LOx-3j; Tue, 07 Feb 2017 14:22:43 -0500 From: David Lechner To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH 3/3] ARM: da850-lego-ev3: Add device tree node for sound Date: Tue, 7 Feb 2017 13:22:09 -0600 Message-Id: <1486495329-2789-4-git-send-email-david@lechnology.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1486495329-2789-1-git-send-email-david@lechnology.com> References: <1486495329-2789-1-git-send-email-david@lechnology.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170207_112407_848752_513E54C3 X-CRM114-Status: UNSURE ( 9.87 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , David Lechner , Kevin Hilman , Sekhar Nori , linux-kernel@vger.kernel.org, Rob Herring MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds a device tree node for sound on LEGO MINDSTORMS EV3. The EV3 uses one of the SoC PWMs connected to an amplifier to create sound from a speaker. The PWM is passed through a low-pass filter, so it is actually possible to do PCM playback, but there is no existing driver, so just using pwm-beeper for now, since it is also a compatible mode of operation. Signed-off-by: David Lechner --- arch/arm/boot/dts/da850-lego-ev3.dts | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts index 0309537..c20580a 100644 --- a/arch/arm/boot/dts/da850-lego-ev3.dts +++ b/arch/arm/boot/dts/da850-lego-ev3.dts @@ -123,6 +123,14 @@ pinctrl-0 = <&system_power_pin>; }; + sound { + compatible = "pwm-beeper"; + pinctrl-names = "default"; + pinctrl-0 = <&ehrpwm0b_pins>; + pwms = <&ehrpwm0 1 1000000 0>; + amp-supply = <&>; + }; + /* * This is a 5V current limiting regulator that is shared by USB, * the sensor (input) ports, the motor (output) ports and the A/DC. @@ -152,6 +160,18 @@ regulator-boot-on; vin-supply = <&vcc5v>; }; + + /* + * This is the amplifier for the speaker. + */ + amp: regulator3 { + pinctrl-names = "default"; + pinctrl-0 = <&_pins>; + compatible = "regulator-fixed"; + regulator-name = "amp"; + gpio = <&gpio 111 GPIO_ACTIVE_HIGH>; + enable-active-high; + }; }; &pmx_core { @@ -208,6 +228,13 @@ 0x4c 0x00008000 0x0000f000 >; }; + + amp_pins: pinmux_amp_pins { + pinctrl-single,bits = < + /* GP6[15] */ + 0x34 0x00000008 0x0000000f + >; + }; }; &pinconf { @@ -316,6 +343,10 @@ }; }; +&ehrpwm0 { + status = "okay"; +}; + &gpio { status = "okay"; };