From patchwork Wed Sep 26 13:09:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 10615947 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AF395417B for ; Wed, 26 Sep 2018 13:10:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9C84F2AE75 for ; Wed, 26 Sep 2018 13:10:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8F92D2AE83; Wed, 26 Sep 2018 13:10:51 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 257082AE75 for ; Wed, 26 Sep 2018 13:10:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728680AbeIZTXa (ORCPT ); Wed, 26 Sep 2018 15:23:30 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:55118 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728469AbeIZTWr (ORCPT ); Wed, 26 Sep 2018 15:22:47 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id w8QD9mF2014975; Wed, 26 Sep 2018 08:09:48 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1537967388; bh=pSmD2M/O+yZuviPXrMoZZB16/Jfgp2hSP7dtvrq1WXQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=AM8dZOgAr5VexWlSN2iXV1OYlm2E+m7jcR2JHiQvyKYSDcc/OBJX3dPHrrY0O/hhr IACRfDXMhImSxt+jEANBV0w6FBxsCfZs41suHGuIRhz609RAW9q59HXHmaUqQHIQxk v7lK6qyCtunN6u6kmsOYtE6dUskcL/ep2XniA2YI= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id w8QD9mXF021315; Wed, 26 Sep 2018 08:09:48 -0500 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Wed, 26 Sep 2018 08:09:48 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Wed, 26 Sep 2018 08:09:48 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id w8QD9mNs003545; Wed, 26 Sep 2018 08:09:48 -0500 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.176.238]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id w8QD9mx11639; Wed, 26 Sep 2018 08:09:48 -0500 (CDT) From: Dan Murphy To: , , CC: , , , , , Dan Murphy Subject: [RFC PATCH 4/9] dt-bindings: leds: Add bindings for lm3697 driver Date: Wed, 26 Sep 2018 08:09:16 -0500 Message-ID: <20180926130921.12329-5-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20180926130921.12329-1-dmurphy@ti.com> References: <20180926130921.12329-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add the device tree bindings for the lm3697 LED driver for backlighting and display. Signed-off-by: Dan Murphy --- .../devicetree/bindings/leds/leds-lm3697.txt | 98 +++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-lm3697.txt diff --git a/Documentation/devicetree/bindings/leds/leds-lm3697.txt b/Documentation/devicetree/bindings/leds/leds-lm3697.txt new file mode 100644 index 000000000000..4bb2ed51025b --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-lm3697.txt @@ -0,0 +1,98 @@ +* Texas Instruments - LM3697 Highly Efficient White LED Driver + +The LM3697 11-bit LED driver provides high- +performance backlight dimming for 1, 2, or 3 series +LED strings while delivering up to 90% efficiency. + +This device is suitable for display and keypad Lighting + +Required properties: + - compatible: + "ti,lm3697" + - reg : I2C slave address + - #address-cells : 1 + - #size-cells : 0 + +Optional properties: + - enable-gpios : GPIO pin to enable/disable the device + - vled-supply : LED supply + +Required child properties: + - reg : 0 - LED is Controlled by bank A + 1 - LED is Controlled by bank B + - led-sources : Indicates which HVLED string is associated to which + control bank. Each element in the array is associated + with a specific HVLED string. Element 0 is HVLED1, + element 1 is HVLED2 and element 2 HVLED3. + Additional information is contained + in Documentation/devicetree/bindings/leds/common.txt + 0 - HVLED is not active in this control bank + 1 - HVLED string is controlled by this control bank + +Optional child properties: + - runtime-ramp-up-msec: Current ramping from one brightness level to + the a higher brightness level. + Range from 2048 us - 117.44 s + - runtime-ramp-down-msec: Current ramping from one brightness level to + the a lower brightness level. + Range from 2048 us - 117.44 s + - label : see Documentation/devicetree/bindings/leds/common.txt + - linux,default-trigger : + see Documentation/devicetree/bindings/leds/common.txt + +Example: + +HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is +controlled by control bank B. + +led-controller@36 { + compatible = "ti,lm3697"; + reg = <0x36>; + #address-cells = <1>; + #size-cells = <0>; + + enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; + vled-supply = <&vbatt>; + + led@0 { + reg = <0>; + led-sources = <1 0 1>; + runtime-ramp-up-msec = <5000>; + runtime-ramp-down-msec = <1000>; + label = "white:first_backlight_cluster"; + linux,default-trigger = "backlight"; + }; + + led@1 { + reg = <1>; + led-sources = <0 1 0>; + runtime-ramp-up-msec = <500>; + runtime-ramp-down-msec = <1000>; + label = "white:second_backlight_cluster"; + linux,default-trigger = "backlight"; + }; +} + +All HVLED strings controlled by control bank A + +led-controller@36 { + compatible = "ti,lm3697"; + reg = <0x36>; + #address-cells = <1>; + #size-cells = <0>; + + enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; + vled-supply = <&vbatt>; + + led@0 { + reg = <0>; + led-sources = <1 1 1>; + runtime-ramp-up-msec = <500>; + runtime-ramp-down-msec = <1000>; + label = "white:backlight_cluster"; + linux,default-trigger = "backlight"; + }; +} + +For more product information please see the link below: +http://www.ti.com/lit/ds/symlink/lm3697.pdf