From patchwork Thu Nov 26 06:56:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kim, Milo" X-Patchwork-Id: 548940 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id B84221402D2 for ; Thu, 26 Nov 2015 18:01:32 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752444AbbKZHBR (ORCPT ); Thu, 26 Nov 2015 02:01:17 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:38329 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752012AbbKZG6t (ORCPT ); Thu, 26 Nov 2015 01:58:49 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id tAQ6wh36025100; Thu, 26 Nov 2015 00:58:43 -0600 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id tAQ6whrU008578; Thu, 26 Nov 2015 00:58:43 -0600 Received: from dflp32.itg.ti.com (10.64.6.15) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.224.2; Thu, 26 Nov 2015 00:58:43 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id tAQ6wgXe018559; Thu, 26 Nov 2015 00:58:43 -0600 From: Milo Kim To: , , , CC: , , , Milo Kim Subject: [PATCH v2 2/9] Documentation: dt-bindings: leds: backlight: add TI LMU backlight binding information Date: Thu, 26 Nov 2015 15:56:58 +0900 Message-ID: <1448521025-2796-3-git-send-email-milo.kim@ti.com> X-Mailer: git-send-email 1.9.5.msysgit.0 In-Reply-To: <1448521025-2796-1-git-send-email-milo.kim@ti.com> References: <1448521025-2796-1-git-send-email-milo.kim@ti.com> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697 use common dt-bindings for describing backlight device. Cc: Rob Herring Cc: devicetree@vger.kernel.org Cc: Lee Jones Cc: Jacek Anaszewski Cc: Mark Brown Cc: linux-leds@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Milo Kim --- .../bindings/leds/backlight/ti-lmu-backlight.txt | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti-lmu-backlight.txt diff --git a/Documentation/devicetree/bindings/leds/backlight/ti-lmu-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/ti-lmu-backlight.txt new file mode 100644 index 0000000..c2c35b2 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/ti-lmu-backlight.txt @@ -0,0 +1,65 @@ +TI LMU backlight device tree bindings + +Required property: + - compatible: Should be one of: + "ti,lm3532-backlight" + "ti,lm3631-backlight" + "ti,lm3632-backlight" + "ti,lm3633-backlight" + "ti,lm3695-backlight" + "ti,lm3697-backlight" + +Optional properties: + There are two backlight control mode. One is I2C, the other is PWM mode. + Following properties are only specified in PWM mode. + Please note that LMU backlight device can have only one PWM channel. + + - pwms: OF device-tree PWM specification. + - pwm-names: a list of names for the PWM devices specified in the "pwms" + property. + + For the PWM user nodes, please refer to [1]. + +Child nodes: + LMU backlight is represented as sub-nodes of the TI LMU device [2]. + So, LMU backlight should have more than one backlight child node. + Each node exactly matches with backlight control bank configuration. + Maximum numbers of child nodes depend on the device. + 1 = LM3631, LM3632, LM3695 + 2 = LM3633, LM3697 + 3 = LM3532 + + Required property of a child node: + - led-sources: List of enabled channels from 0 to 2. + Please refer to LED binding [3]. + For output channels, please refer to the datasheets [4]. + + Optional properties of a child node: + - label: Backlight channel identification. + Please refer to LED binding [3]. + - default-brightness-level: Backlight initial brightness value. + Type is . It is set as soon as backlight + device is created. + 0 ~ 2047 = LM3631, LM3632, LM3633, LM3695 and + LM3697 + 0 ~ 255 = LM3532 + - ramp-up-msec, ramp-down-msec: Light dimming effect properties. + Type is . Unit is millisecond. + 0 ~ 65 msec = LM3532 + 0 ~ 4000 msec = LM3631 + 0 ~ 16000 msec = LM3633 and LM3697 + - pwm-period: PWM period. Only valid in PWM brightness mode. + Type is . If this property is missing, then control + mode is set to I2C by default. + +Examples: Please refer to ti-lmu dt-bindings. [2]. + +[1] ../pwm/pwm.txt +[2] ../mfd/ti-lmu.txt +[3] ../leds/common.txt +[4] LM3532: http://www.ti.com/product/LM3532/datasheet + LM3631: http://www.ti.com/product/LM3631/datasheet + LM3632: http://www.ti.com/product/LM3632A/datasheet + LM3633: http://www.ti.com/product/LM3633/datasheet + LM3695: Datasheet is not opened yet, but only two strings are used. + LM3697: http://www.ti.com/product/LM3697/datasheet