From patchwork Tue May 15 15:43:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 135899 Delivered-To: patch@linaro.org Received: by 2002:a2e:9706:0:0:0:0:0 with SMTP id r6-v6csp1183610lji; Tue, 15 May 2018 08:44:14 -0700 (PDT) X-Google-Smtp-Source: AB8JxZqWK8eIIyyOP/eMzthm7NG5kQz+PaMbtIlSpubUF97R5dY2aWh72ygm+tFJ8FM8m125m7It X-Received: by 2002:a65:534b:: with SMTP id w11-v6mr12507881pgr.79.1526399054160; Tue, 15 May 2018 08:44:14 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1526399054; cv=none; d=google.com; s=arc-20160816; b=OBxHp9dlab38BOt4sEnD0GjftvRzKyik9W8kM6syYWDb+lli1VRxUPp6cQNig8jN1J bzymr8WvmzuV7YQYIbHfzZ3jXx/SEZI7fD3D42Bx+PiB0aCYvHbRgUfkfCfkQZVjE6Ep z85ApVCOlvojWrh8W//yrmQx9/pvqn0Dilaeh2mwALcso9Q45byurXLDwt4TUjVUKCrx KxBzo7o8/XU9a8o5OGoxkufzbBJeOot0AtlFI9L0MrxW/G38qjQADyuPpTdsZoeVWMuu d8eZU2OCj+tBEDZ/MMHT2qa5jkj4Heia4ePLXTCPPYLeJTKZ1IwRVOiCYxFexK3MK259 tjog== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:message-id:date:subject:cc :to:from:dkim-signature:arc-authentication-results; bh=ajqQ3mNUKx9IUPH4ZfYDJ8zv+rvdcWuoY6xjerZdWn0=; b=u8xrVkY2bPnm0+Mp40cXDra0sK4qDrP7BkIbc8uV7lUA0gEM1MzebWMvWqjznKVWb+ TZcgr4kBcM6LK/AMexvul8U1EQhlBmFNExsg3aCgV0vmpXdBMJnkA7L0WTvR8UQxlZMj sC+FdAjLzmFTslBHch96mNlgLWkr/G+sS98WzPRH+fllTUPiwnR6OD2Yv9MDbuLlp26e BSu+SrElmHtyUGdffdja/OjkD8YigQOXJAhiQ7u1TzHmg5v19z2AC6CSDsmfaA3I9N6d /bZxO+MMOr3nEJ2TvezTzL9CJuFqPnE9u8c2B1UfdVfvr1NYvamOsJXAY5a4qQlanYZF tF9w== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@ti.com header.s=ti-com-17Q1 header.b=TF2KTWL/; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 21-v6si302524pfy.293.2018.05.15.08.44.13; Tue, 15 May 2018 08:44:14 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@ti.com header.s=ti-com-17Q1 header.b=TF2KTWL/; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753710AbeEOPoM (ORCPT + 5 others); Tue, 15 May 2018 11:44:12 -0400 Received: from lelnx193.ext.ti.com ([198.47.27.77]:32815 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752931AbeEOPoL (ORCPT ); Tue, 15 May 2018 11:44:11 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by lelnx193.ext.ti.com (8.15.1/8.15.1) with ESMTP id w4FFi3dt029947; Tue, 15 May 2018 10:44:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1526399043; bh=Haxtnw0Ys3lvemvuKIqi46hezwzhGOhMUJX8IF1p5T8=; h=From:To:CC:Subject:Date; b=TF2KTWL/yy9w8PP2p8HtPbatMZEjz+C7WBZ9UhGxSz63rOVdmk+ZyCgYAW2n4Z4vd buvlRpVyH3I1dtvyO2iHr52ljQRjeshYUeC2exbbrj4TuEO87t/dR8czoajw8zCa2f eMlDe1TQ8VSzS59958iqIRJjnH/zpqzRT7B7j1uc= Received: from DLEE111.ent.ti.com (dlee111.ent.ti.com [157.170.170.22]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id w4FFi3GX008865; Tue, 15 May 2018 10:44:03 -0500 Received: from DLEE112.ent.ti.com (157.170.170.23) by DLEE111.ent.ti.com (157.170.170.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Tue, 15 May 2018 10:44:03 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Tue, 15 May 2018 10:44:03 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id w4FFi3si003076; Tue, 15 May 2018 10:44:03 -0500 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.186.233]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id w4FFi2x04755; Tue, 15 May 2018 10:44:02 -0500 (CDT) From: Dan Murphy To: , , , CC: , , , Dan Murphy Subject: [PATCH v6 1/2] dt: bindings: lm3601x: Introduce the lm3601x driver Date: Tue, 15 May 2018 10:43:51 -0500 Message-ID: <20180515154352.20263-1-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Introduce the device tree bindings for the lm3601x family of LED torch, flash and IR drivers. Signed-off-by: Dan Murphy --- v6 - Removed multiple led child nodes, fixed example to display micro ranges for corresponding child nodes and added led-sources to define the current driver - https://patchwork.kernel.org/patch/10392121/ v5 - No changes - https://patchwork.kernel.org/patch/10391743/ v4 - Added " " around "=", changed strobe to flash on label, removed "support and register" comment and change ir lable to ir:torch - See v2 patchworks for comments v3 - Removed wildcard compatible - https://patchwork.kernel.org/patch/10386241/ v2 - No changes - https://patchwork.kernel.org/patch/10384587/ .../devicetree/bindings/leds/leds-lm3601x.txt | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-lm3601x.txt -- 2.17.0.582.gccdcbd54c -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/leds/leds-lm3601x.txt b/Documentation/devicetree/bindings/leds/leds-lm3601x.txt new file mode 100644 index 000000000000..27930a89e9a5 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-lm3601x.txt @@ -0,0 +1,47 @@ +* Texas Instruments - lm3601x Single-LED Flash Driver + +The LM3601X are ultra-small LED flash drivers that +provide a high level of adjustability. + +Required properties: + - compatible : Can be one of the following + "ti,lm36010" + "ti,lm36011" + - reg : I2C slave address + - #address-cells : 1 + - #size-cells : 0 + +Required child properties: + - reg : 0 + - led-sources: 0 - Indicates a IR mode + 1 - Indicates a Torch (white LED) mode + +Required properties for flash LED child nodes: + See Documentation/devicetree/bindings/leds/common.txt + - flash-max-microamp : Range from 11mA -> 1.5A + - flash-max-timeout-us : Range from 40ms -> 1600ms + - led-max-microamp : Range from 2.4mA -> 376mA + +Optional child properties: + - label : see Documentation/devicetree/bindings/leds/common.txt + +Example: +led-controller@64 { + compatible = "ti,lm36010"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x64>; + + led@0 { + reg = <0>; + label = "white:torch"; + led-max-microamp = <376000>; + flash-max-microamp = <1500000>; + flash-max-timeout-us = <1600000>; + led-sources = <1>; + }; +} + +For more product information please see the links below: +http://www.ti.com/product/LM36010 +http://www.ti.com/product/LM36011 From patchwork Tue May 15 15:43:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 135900 Delivered-To: patch@linaro.org Received: by 2002:a2e:9706:0:0:0:0:0 with SMTP id r6-v6csp1183634lji; Tue, 15 May 2018 08:44:15 -0700 (PDT) X-Google-Smtp-Source: AB8JxZpsuQjLTP/RvJPX2AadeSgYWhOXJe3UNRu0dBwW18qSeluUc7zCCDKNMYCMEhwki6I23uhh X-Received: by 2002:a62:a89:: with SMTP id 9-v6mr15426434pfk.112.1526399055397; Tue, 15 May 2018 08:44:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1526399055; cv=none; d=google.com; s=arc-20160816; b=JX1h0N5BWICSX70bCKS1h7ZacfN89Qrb1EL89A0Bg6ZWyoiV5LTgfeXKCh+hVmBK1g v3RjGicToCrwJHaLfK3VxFMofMUWL83ruoV8CVbS/JCFvUEMFMENNLWY4dWdabwxGY5p OSxS96AapBC0ub88omoeGcjenuLCQdcKS5agRNq5Wf+ed+6jRONXBynFuchlmwJ2yN9G gkqb8aQ/dwoJ1RlwMeFUbVr7CmU+CkzzqoEsR/LVx2HyIuCYOkQ/FL2Nuto4k/CFvr3Y 4OuU/JIWd3/vBm45wVp/HV1XO+1Z99p9JkJEcZJxS/CuPC7uci4hIcFwb2R38SxJN6rW VUIg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature :arc-authentication-results; bh=MBM9SL1yVM5xLAPwYmQ7bzXERIxIFHxNseYw6MGLM+4=; b=qj424fuqrO11eOHEjArBgKuOQEz/lRnAnIIvEl7g8zT4Kw1NeAyJZK/XsYCuC4IilK o61ARgis9xsehJUj8z2FZxmM2JGkUidc1zT4fuN6FYDfG/Ze7MHew3s15aorGUa9pkZa cV4DHkqmWyNH67Fa4wJHj63OlvfiqrtrhQVyWroEoW1oGG0A4fueYSi13WOFXOaVpY9C p7Oh8uMw8ySIrLSRq5sQMDiWPhH3ljadicVN74/MLv3OxkLCfFskpzW4DqCTCnCUTH0x 5zgfBibahg95oVoqOqqJ5l1ps9zwuOIuDCGxOd1xZ6b3B6nCpJi36u9H1vah9fUxHnd8 530A== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@ti.com header.s=ti-com-17Q1 header.b=G7oQ/Pl7; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 21-v6si302524pfy.293.2018.05.15.08.44.15; Tue, 15 May 2018 08:44:15 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@ti.com header.s=ti-com-17Q1 header.b=G7oQ/Pl7; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753972AbeEOPoN (ORCPT + 5 others); Tue, 15 May 2018 11:44:13 -0400 Received: from lelnx193.ext.ti.com ([198.47.27.77]:32816 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753531AbeEOPoL (ORCPT ); Tue, 15 May 2018 11:44:11 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by lelnx193.ext.ti.com (8.15.1/8.15.1) with ESMTP id w4FFi40x029952; Tue, 15 May 2018 10:44:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1526399044; bh=N06k+fL2oyfq4lLJrUP4tRFO/9QOp8kMTejJYEw9pNA=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=G7oQ/Pl77hh5CG5o6wYDOCGDHBKZ0liRdt8aP7XjV59iPulYSyYfMglXoZGpFNyiH AOm5FN53DoUi+obsJV07XNTys4UMKKkNi/EmZ4wEkL/3RLU2ldAoSQE2q/xss1UlvG IXawAQlXM0Oow8LOrYQd1dfnx3ucRH8UcxDTKgOE= Received: from DFLE110.ent.ti.com (dfle110.ent.ti.com [10.64.6.31]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id w4FFi4NM008894; Tue, 15 May 2018 10:44:04 -0500 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Tue, 15 May 2018 10:44:03 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) 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; Tue, 15 May 2018 10:44:03 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w4FFi3Nk015297; Tue, 15 May 2018 10:44:03 -0500 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.186.233]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id w4FFi3x04759; Tue, 15 May 2018 10:44:03 -0500 (CDT) From: Dan Murphy To: , , , CC: , , , Dan Murphy Subject: [PATCH v6 2/2] leds: lm3601x: Introduce the lm3601x LED driver Date: Tue, 15 May 2018 10:43:52 -0500 Message-ID: <20180515154352.20263-2-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20180515154352.20263-1-dmurphy@ti.com> References: <20180515154352.20263-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Introduce the family of LED devices that can drive a torch, strobe or IR LED. The LED driver can be configured with a strobe timer to execute a strobe flash. The IR LED brightness is controlled via the torch brightness register. The data sheet for each the LM36010 and LM36011 LED drivers can be found here: http://www.ti.com/product/LM36010 http://www.ti.com/product/LM36011 Signed-off-by: Dan Murphy --- v6 - This driver has been heavily modified from v5. There is no longer reading of individual child nodes. There are too many changes to list here see - https://patchwork.kernel.org/patch/10392123/ v5 - Fixed magic numbers, change reg cache type, added of_put_node to release the dt node ref, and I did not change the remove function to leave the LED in its state on driver removal - https://patchwork.kernel.org/patch/10391741/ v4 - Fixed Cocci issue using ARRAY_SIZE - https://patchwork.kernel.org/patch/10389259/ v3 - removed wildcard dt compatible, fixed copyright, fixed struct doc, removed RO registers from default, added regmap volatile for FLAGS_REG, updated regmap cache type, fixed unlock and extra semi colon in strobe_set, removed unnecessary out label in led register and fixed checking of the ret in brightness_set - https://patchwork.kernel.org/patch/10386243/ v2 - Fixed kbuild issue and removed unused cdev_strobe - https://patchwork.kernel.org/patch/10384585/ drivers/leds/Kconfig | 9 + drivers/leds/Makefile | 1 + drivers/leds/leds-lm3601x.c | 595 ++++++++++++++++++++++++++++++++++++ 3 files changed, 605 insertions(+) create mode 100644 drivers/leds/leds-lm3601x.c -- 2.17.0.582.gccdcbd54c -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 2c896c0e69e1..50ae536f343f 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -145,6 +145,15 @@ config LEDS_LM3692X This option enables support for the TI LM3692x family of white LED string drivers used for backlighting. +config LEDS_LM3601X + tristate "LED support for LM3601x Chips" + depends on LEDS_CLASS && I2C && OF + depends on LEDS_CLASS_FLASH + select REGMAP_I2C + help + This option enables support for the TI LM3601x family + of flash, torch and indicator classes. + config LEDS_LOCOMO tristate "LED Support for Locomo device" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 91eca81cae82..b79807fe1b67 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -76,6 +76,7 @@ obj-$(CONFIG_LEDS_MLXREG) += leds-mlxreg.o obj-$(CONFIG_LEDS_NIC78BX) += leds-nic78bx.o obj-$(CONFIG_LEDS_MT6323) += leds-mt6323.o obj-$(CONFIG_LEDS_LM3692X) += leds-lm3692x.o +obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o # LED SPI Drivers obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o diff --git a/drivers/leds/leds-lm3601x.c b/drivers/leds/leds-lm3601x.c new file mode 100644 index 000000000000..fa87da5d5159 --- /dev/null +++ b/drivers/leds/leds-lm3601x.c @@ -0,0 +1,595 @@ +// SPDX-License-Identifier: GPL-2.0 +// Flash and torch driver for Texas Instruments LM3601X LED +// Flash driver chip family +// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define LM3601X_LED_TORCH 0x0 +#define LM3601X_LED_IR 0x1 + +/* Registers */ +#define LM3601X_ENABLE_REG 0x01 +#define LM3601X_CFG_REG 0x02 +#define LM3601X_LED_FLASH_REG 0x03 +#define LM3601X_LED_TORCH_REG 0x04 +#define LM3601X_FLAGS_REG 0x05 +#define LM3601X_DEV_ID_REG 0x06 + +#define LM3601X_SW_RESET BIT(7) + +/* Enable Mode bits */ +#define LM3601X_MODE_STANDBY 0x00 +#define LM3601X_MODE_IR_DRV BIT(0) +#define LM3601X_MODE_TORCH BIT(1) +#define LM3601X_MODE_STROBE (BIT(0) | BIT(1)) +#define LM3601X_STRB_EN BIT(2) +#define LM3601X_STRB_LVL_TRIG ~BIT(3) +#define LM3601X_STRB_EDGE_TRIG BIT(3) +#define LM3601X_IVFM_EN BIT(4) + +#define LM36010_BOOST_LIMIT_19 ~BIT(5) +#define LM36010_BOOST_LIMIT_28 BIT(5) +#define LM36010_BOOST_FREQ_2MHZ ~BIT(6) +#define LM36010_BOOST_FREQ_4MHZ BIT(6) +#define LM36010_BOOST_MODE_NORM ~BIT(7) +#define LM36010_BOOST_MODE_PASS BIT(7) + +/* Flag Mask */ +#define LM3601X_FLASH_TIME_OUT BIT(0) +#define LM3601X_UVLO_FAULT BIT(1) +#define LM3601X_THERM_SHUTDOWN BIT(2) +#define LM3601X_THERM_CURR BIT(3) +#define LM36010_CURR_LIMIT BIT(4) +#define LM3601X_SHORT_FAULT BIT(5) +#define LM3601X_IVFM_TRIP BIT(6) +#define LM36010_OVP_FAULT BIT(7) + +#define LM3601X_MIN_TORCH_I_UA 2400 +#define LM3601X_MIN_STROBE_I_MA 11 + +#define LM3601X_TIMEOUT_MASK 0x1e +#define LM3601X_ENABLE_MASK 0x03 + +enum lm3601x_type { + CHIP_LM36010 = 0, + CHIP_LM36011, +}; + +/** + * struct lm3601x_max_timeouts - + * @timeout: timeout value in ms + * @regval: the value of the register to write + */ +struct lm3601x_max_timeouts { + int timeout; + int reg_val; +}; + +/** + * struct lm3601x_led - + * @lock: Lock for reading/writing the device + * @regmap: Devices register map + * @client: Pointer to the I2C client + * @led_node: DT device node for the led + * @cdev_torch: led class device pointer for the torch + * @cdev_ir: led class device pointer for infrared + * @fled_cdev: flash led class device pointer + * @led_name: LED label for the Torch or IR LED + * @strobe: LED label for the strobe + * @last_flag: last known flags register value + * @strobe_timeout: the timeout for the strobe + * @torch_current_max: maximum current for the torch + * @strobe_current_max: maximum current for the strobe + * @max_strobe_timeout: maximum timeout for the strobe + * @led_mode: The mode to enable either IR or Torch + */ +struct lm3601x_led { + struct mutex lock; + struct regmap *regmap; + struct i2c_client *client; + + struct device_node *led_node; + + struct led_classdev cdev_torch; + struct led_classdev cdev_ir; + + struct led_classdev_flash fled_cdev; + + char led_name[LED_MAX_NAME_SIZE]; + char strobe[LED_MAX_NAME_SIZE]; + + unsigned int last_flag; + unsigned int strobe_timeout; + + u32 torch_current_max; + u32 strobe_current_max; + u32 max_strobe_timeout; + + int led_mode; +}; + +static const struct lm3601x_max_timeouts strobe_timeouts[] = { + { 40000, 0x00 }, + { 80000, 0x01 }, + { 120000, 0x02 }, + { 160000, 0x03 }, + { 200000, 0x04 }, + { 240000, 0x05 }, + { 280000, 0x06 }, + { 320000, 0x07 }, + { 360000, 0x08 }, + { 400000, 0x09 }, + { 600000, 0x0a }, + { 800000, 0x0b }, + { 1000000, 0x0c }, + { 1200000, 0x0d }, + { 1400000, 0x0e }, + { 1600000, 0x0f }, +}; + +static const struct reg_default lm3601x_regmap_defs[] = { + { LM3601X_ENABLE_REG, 0x20 }, + { LM3601X_CFG_REG, 0x15 }, + { LM3601X_LED_FLASH_REG, 0x00 }, + { LM3601X_LED_TORCH_REG, 0x00 }, +}; + +static bool lm3601x_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LM3601X_FLAGS_REG: + return true; + default: + return false; + } +} + +static const struct regmap_config lm3601x_regmap = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = LM3601X_DEV_ID_REG, + .reg_defaults = lm3601x_regmap_defs, + .num_reg_defaults = ARRAY_SIZE(lm3601x_regmap_defs), + .cache_type = REGCACHE_RBTREE, + .volatile_reg = lm3601x_volatile_reg, +}; + +static struct lm3601x_led *fled_cdev_to_led( + struct led_classdev_flash *fled_cdev) +{ + return container_of(fled_cdev, struct lm3601x_led, fled_cdev); +} + +static int lm3601x_read_faults(struct lm3601x_led *led) +{ + int flags_val; + int ret; + + ret = regmap_read(led->regmap, LM3601X_FLAGS_REG, &flags_val); + if (ret < 0) + return -EIO; + + led->last_flag = 0; + + if (flags_val & LM36010_OVP_FAULT) + led->last_flag |= LED_FAULT_OVER_VOLTAGE; + + if (flags_val & (LM3601X_THERM_SHUTDOWN | LM3601X_THERM_CURR)) + led->last_flag |= LED_FAULT_OVER_TEMPERATURE; + + if (flags_val & LM3601X_SHORT_FAULT) + led->last_flag |= LED_FAULT_SHORT_CIRCUIT; + + if (flags_val & LM36010_CURR_LIMIT) + led->last_flag |= LED_FAULT_OVER_CURRENT; + + if (flags_val & LM3601X_UVLO_FAULT) + led->last_flag |= LED_FAULT_UNDER_VOLTAGE; + + if (flags_val & LM3601X_IVFM_TRIP) + led->last_flag |= LED_FAULT_INPUT_VOLTAGE; + + if (flags_val & LM3601X_THERM_SHUTDOWN) + led->last_flag |= LED_FAULT_LED_OVER_TEMPERATURE; + + return led->last_flag; +} + +static int lm3601x_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lm3601x_led *led = + container_of(cdev, struct lm3601x_led, cdev_torch); + u8 brightness_val; + int ret, led_mode_val; + + mutex_lock(&led->lock); + + ret = lm3601x_read_faults(led); + if (ret < 0) + goto out; + + if (led->led_mode == LM3601X_LED_TORCH) + led_mode_val = LM3601X_MODE_TORCH; + else + led_mode_val = LM3601X_MODE_IR_DRV; + + if (brightness == LED_OFF) { + ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG, + led_mode_val, LED_OFF); + goto out; + } + + if (brightness == LED_ON) + brightness_val = LED_ON; + else + brightness_val = (brightness/2); + + ret = regmap_write(led->regmap, LM3601X_LED_TORCH_REG, brightness_val); + if (ret < 0) + goto out; + + ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG, + led_mode_val, + led_mode_val); + +out: + mutex_unlock(&led->lock); + return ret; +} + +static int lm3601x_strobe_set(struct led_classdev_flash *fled_cdev, + bool state) +{ + struct lm3601x_led *led = fled_cdev_to_led(fled_cdev); + int ret; + int current_timeout; + int reg_count; + int i; + int timeout_reg_val = 0; + + mutex_lock(&led->lock); + + ret = regmap_read(led->regmap, LM3601X_CFG_REG, ¤t_timeout); + if (ret < 0) + goto out; + + reg_count = ARRAY_SIZE(strobe_timeouts); + for (i = 0; i < reg_count; i++) { + if (led->strobe_timeout > strobe_timeouts[i].timeout) + continue; + + if (led->strobe_timeout <= strobe_timeouts[i].timeout) { + timeout_reg_val = (strobe_timeouts[i].reg_val << 1); + break; + } + + ret = -EINVAL; + goto out; + } + + if (led->strobe_timeout != current_timeout) + ret = regmap_update_bits(led->regmap, LM3601X_CFG_REG, + LM3601X_TIMEOUT_MASK, timeout_reg_val); + + if (state) + ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG, + LM3601X_MODE_STROBE, + LM3601X_MODE_STROBE); + else + ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG, + LM3601X_MODE_STROBE, LED_OFF); + + ret = lm3601x_read_faults(led); +out: + mutex_unlock(&led->lock); + return ret; +} + +static int lm3601x_strobe_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(cdev); + struct lm3601x_led *led = fled_cdev_to_led(fled_cdev); + int ret; + u8 brightness_val; + + mutex_lock(&led->lock); + ret = lm3601x_read_faults(led); + if (ret < 0) + goto out; + + if (brightness == LED_OFF) { + ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG, + LM3601X_MODE_STROBE, LED_OFF); + goto out; + } + + if (brightness == LED_ON) + brightness_val = LED_ON; + else + brightness_val = (brightness/2); + + ret = regmap_write(led->regmap, LM3601X_LED_FLASH_REG, brightness_val); + +out: + mutex_unlock(&led->lock); + return ret; +} + +static int lm3601x_strobe_timeout_set(struct led_classdev_flash *fled_cdev, + u32 timeout) +{ + struct lm3601x_led *led = fled_cdev_to_led(fled_cdev); + int ret = 0; + + mutex_lock(&led->lock); + + led->strobe_timeout = timeout; + + mutex_unlock(&led->lock); + + return ret; +} + +static int lm3601x_strobe_get(struct led_classdev_flash *fled_cdev, + bool *state) +{ + struct lm3601x_led *led = fled_cdev_to_led(fled_cdev); + int ret; + int strobe_state; + + mutex_lock(&led->lock); + + ret = regmap_read(led->regmap, LM3601X_ENABLE_REG, &strobe_state); + if (ret < 0) + goto out; + + *state = strobe_state & LM3601X_MODE_STROBE; + +out: + mutex_unlock(&led->lock); + return ret; +} + +static int lm3601x_strobe_fault_get(struct led_classdev_flash *fled_cdev, + u32 *fault) +{ + struct lm3601x_led *led = fled_cdev_to_led(fled_cdev); + + lm3601x_read_faults(led); + + *fault = led->last_flag; + + return 0; +} + +static const struct led_flash_ops strobe_ops = { + .strobe_set = lm3601x_strobe_set, + .strobe_get = lm3601x_strobe_get, + .timeout_set = lm3601x_strobe_timeout_set, + .fault_get = lm3601x_strobe_fault_get, +}; + +static int lm3601x_register_leds(struct lm3601x_led *led) +{ + struct led_classdev_flash *fled_cdev; + struct led_classdev *led_cdev; + int err = -ENODEV; + + led->cdev_torch.name = led->led_name; + led->cdev_torch.max_brightness = LED_FULL; + led->cdev_torch.brightness_set_blocking = lm3601x_brightness_set; + err = devm_led_classdev_register(&led->client->dev, + &led->cdev_torch); + if (err < 0) + return err; + + fled_cdev = &led->fled_cdev; + fled_cdev->ops = &strobe_ops; + + led_cdev = &fled_cdev->led_cdev; + led_cdev->name = led->strobe; + led_cdev->max_brightness = LED_FULL; + led_cdev->brightness_set_blocking = lm3601x_strobe_brightness_set; + led_cdev->flags |= LED_DEV_CAP_FLASH; + + err = led_classdev_flash_register(&led->client->dev, + fled_cdev); + + return err; +} + +static void lm3601x_init_flash_timeout(struct lm3601x_led *led) +{ + struct led_flash_setting *setting; + + setting = &led->fled_cdev.timeout; + setting->min = strobe_timeouts[0].timeout; + setting->max = led->max_strobe_timeout; + setting->step = 40; + setting->val = led->max_strobe_timeout; +} + +static int lm3601x_parse_node(struct lm3601x_led *led, + struct device_node *node) +{ + struct device_node *child_node; + const char *name; + char *mode_name; + int ret = -ENODEV; + + for_each_available_child_of_node(node, child_node) { + led->led_node = of_node_get(child_node); + if (!led->led_node) { + dev_err(&led->client->dev, + "No LED Child node\n"); + + goto out_err; + } + + ret = of_property_read_u32(led->led_node, "led-sources", + &led->led_mode); + if (ret) { + dev_err(&led->client->dev, + "led-sources DT property missing\n"); + goto out_err; + } + + if (led->led_mode < LM3601X_LED_TORCH || + led->led_mode > LM3601X_LED_IR) { + dev_warn(&led->client->dev, + "Invalid led mode requested\n"); + + goto out_err; + + } + } + + if (led->led_mode == LM3601X_LED_TORCH) { + ret = of_property_read_string(led->led_node, "label", &name); + if (!ret) + snprintf(led->led_name, sizeof(led->led_name), + "%s:%s", led->led_node->name, name); + else + snprintf(led->led_name, sizeof(led->led_name), + "%s:torch", led->led_node->name); + + ret = of_property_read_u32(led->led_node, "led-max-microamp", + &led->torch_current_max); + if (ret < 0) { + dev_warn(&led->client->dev, + "led-max-microamp DT property missing\n"); + + goto out_err; + } + + mode_name = "torch"; + + } else if (led->led_mode == LM3601X_LED_IR) { + ret = of_property_read_string(led->led_node, "label", &name); + if (!ret) + snprintf(led->led_name, sizeof(led->led_name), + "%s:%s", led->led_node->name, name); + else + snprintf(led->led_name, sizeof(led->led_name), + "%s::infrared", led->led_node->name); + + mode_name = "ir"; + + } else { + dev_warn(&led->client->dev, + "No LED mode is selected exiting probe\n"); + + goto out_err; + } + + /* Flash mode is available in IR or Torch mode so read the DT */ + snprintf(led->strobe, sizeof(led->strobe), + "%s:%s:strobe", led->led_node->name, mode_name); + + ret = of_property_read_u32(led->led_node, + "flash-max-microamp", + &led->strobe_current_max); + if (ret < 0) { + dev_warn(&led->client->dev, + "flash-max-microamp DT property missing\n"); + goto out_err; + } + + ret = of_property_read_u32(led->led_node, + "flash-max-timeout-us", + &led->max_strobe_timeout); + if (ret < 0) { + dev_warn(&led->client->dev, + "flash-max-timeout-us DT property missing\n"); + + goto out_err; + } + + lm3601x_init_flash_timeout(led); + +out_err: + of_node_put(led->led_node); + return ret; +} + +static int lm3601x_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lm3601x_led *led; + int err; + + led = devm_kzalloc(&client->dev, + sizeof(struct lm3601x_led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + err = lm3601x_parse_node(led, client->dev.of_node); + if (err < 0) + return -ENODEV; + + led->client = client; + led->regmap = devm_regmap_init_i2c(client, &lm3601x_regmap); + if (IS_ERR(led->regmap)) { + err = PTR_ERR(led->regmap); + dev_err(&client->dev, + "Failed to allocate register map: %d\n", err); + return err; + } + + mutex_init(&led->lock); + i2c_set_clientdata(client, led); + err = lm3601x_register_leds(led); + + return err; +} + +static int lm3601x_remove(struct i2c_client *client) +{ + struct lm3601x_led *led = i2c_get_clientdata(client); + + regmap_update_bits(led->regmap, LM3601X_ENABLE_REG, + LM3601X_ENABLE_MASK, + LM3601X_MODE_STANDBY); + + return 0; +} + +static const struct i2c_device_id lm3601x_id[] = { + { "LM36010", CHIP_LM36010 }, + { "LM36011", CHIP_LM36011 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, lm3601x_id); + +static const struct of_device_id of_lm3601x_leds_match[] = { + { .compatible = "ti,lm36010", }, + { .compatible = "ti,lm36011", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_lm3601x_leds_match); + +static struct i2c_driver lm3601x_i2c_driver = { + .driver = { + .name = "lm3601x", + .of_match_table = of_lm3601x_leds_match, + }, + .probe = lm3601x_probe, + .remove = lm3601x_remove, + .id_table = lm3601x_id, +}; +module_i2c_driver(lm3601x_i2c_driver); + +MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3601X"); +MODULE_AUTHOR("Dan Murphy "); +MODULE_LICENSE("GPL v2");