From patchwork Wed May 9 11:57:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 135253 Delivered-To: patch@linaro.org Received: by 10.46.151.6 with SMTP id r6csp5542707lji; Wed, 9 May 2018 04:57:48 -0700 (PDT) X-Google-Smtp-Source: AB8JxZpXXMQndZvdgaRf14B9H7u58C0Adimu1w0lLubquTvbBsc5oH1mnD7gwg9Ox2oBtvY6VhzJ X-Received: by 2002:a17:902:2f84:: with SMTP id t4-v6mr46510812plb.24.1525867068098; Wed, 09 May 2018 04:57:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525867068; cv=none; d=google.com; s=arc-20160816; b=OeeaZXd0LoJxChlYg5l56mQoHytGOgFz3btLl1RrIVIcPyFgbxSO18JvH7awLrfbhS oM5dtLnOxyKvqZwfRokQn4ZFFbhiMI68XbpLr3EigNEBiopa16rC0RI6tRslSEbW7I93 XhTXp1WfHRDusHaFGYTMzRDrPIP6/lFJXOGNcGQCeHdpc9uBmMLRsCBstSFRUrfpV5NM BRv74xYZtwFd+dcFSFArIw9Ml9xR/mIQwIwe5mBD7UI0oPz6szPKazMZSVSttjlI3++R +xFV1etLJVnLT4t+GewhMZVYEQp3+O9T9OiWVD+Q+9oPHHdUIf9DUnOTFIC18hQxcHpR COhA== 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=4s6G3EINzFTDF3QKojUsMpqNMlYwx/wZLV0hDbKzb0Y=; b=vgvjDjRoBRAiZReyaywWqVR/NzMrSWc+N1toboXaile++kzv1iWfLbG/lRJCyDvAMz I1ME9AmM5g/T1jF271UTU5LFqpV0//5mYxeLk7xbQnRdeM6Tz50P5UCSSJUi5UhHfyaB kuHyp92HQ/JQ7nHQp+kMURHwoWBR752JGY+KHqx4koGFexI5K0cRpCBY2meAi78ffWrK Ushdr4PEDRG/y4S4Scayt/RV4Dy2ZYoPTPp6QTltjWS/ap1t2efAGy7LMWn9v7jtYGVM nQM3PDX/JBYVKrC0gv+a0PLHfgW/oVEv1jdyCazaF2lh79j8u7j8JpF8inm/uwLhloUe +nFg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=EOYZ1avY; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (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 68-v6si26228462pla.452.2018.05.09.04.57.47; Wed, 09 May 2018 04:57:48 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=EOYZ1avY; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934785AbeEIL5p (ORCPT + 29 others); Wed, 9 May 2018 07:57:45 -0400 Received: from lelnx194.ext.ti.com ([198.47.27.80]:56180 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934708AbeEIL5j (ORCPT ); Wed, 9 May 2018 07:57:39 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by lelnx194.ext.ti.com (8.15.1/8.15.1) with ESMTP id w49BvVkh003497; Wed, 9 May 2018 06:57:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1525867051; bh=4s6G3EINzFTDF3QKojUsMpqNMlYwx/wZLV0hDbKzb0Y=; h=From:To:CC:Subject:Date; b=EOYZ1avYTrZJtztur3PLI5P+TiMMbo4deqMteoyALfO3pDSavuGk9KUDWncSA1MXb eutA/FFJrN2n8yrLey/TjxxS04kMHXzyCRhmW4tkwmByyQ8EL6rkYZUgwJo9XnlpE8 dN1LJG4SQHCGs2UR7DVbZVdWgLUXbrXiXQ4I9NmQ= Received: from DLEE112.ent.ti.com (dlee112.ent.ti.com [157.170.170.23]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id w49BvVGZ008006; Wed, 9 May 2018 06:57:31 -0500 Received: from DLEE105.ent.ti.com (157.170.170.35) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1466.3; Wed, 9 May 2018 06:57:31 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Wed, 9 May 2018 06:57:31 -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 w49BvVLo027998; Wed, 9 May 2018 06:57:31 -0500 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.166.20]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id w49BvUx24043; Wed, 9 May 2018 06:57:30 -0500 (CDT) From: Dan Murphy To: , , , , CC: , , , Dan Murphy Subject: [PATCH v3 1/2] dt: bindings: lm3601x: Introduce the lm3601x driver Date: Wed, 9 May 2018 06:57:26 -0500 Message-ID: <20180509115727.12070-1-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: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce the device tree bindings for the lm3601x family of LED torch, flash and IR drivers. Signed-off-by: Dan Murphy --- 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 | 50 +++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-lm3601x.txt -- 2.17.0.582.gccdcbd54c diff --git a/Documentation/devicetree/bindings/leds/leds-lm3601x.txt b/Documentation/devicetree/bindings/leds/leds-lm3601x.txt new file mode 100644 index 000000000000..a2fc350bc5f1 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-lm3601x.txt @@ -0,0 +1,50 @@ +* Texas Instruments - lm3601x Single-LED Flash Driver + +The LM3601X are ultra-small LED flash drivers that +provides 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 - Indicates to support and register a torch interface + 1 - Indicates to support and register a strobe interface + 2 - Indicates to support and register an ir interface + +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=<10000>; + }; + + led@1 { + reg = <1>; + label = "white:strobe"; + flash-max-microamp=<10000>; + flash-max-timeout-us=<800>; + }; + + led@2 { + reg = <2>; + label = "invisible:ir"; + }; +} + +For more product information please see the links below: +http://www.ti.com/product/LM36010 +http://www.ti.com/product/LM36011 From patchwork Wed May 9 11:57:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 135252 Delivered-To: patch@linaro.org Received: by 10.46.151.6 with SMTP id r6csp5542677lji; Wed, 9 May 2018 04:57:46 -0700 (PDT) X-Google-Smtp-Source: AB8JxZq5voz74CExy0D8GVMWH2fOE/263XhcXJWkHvROPcH96hDfb7Pz+dvc2BeiRdSeX/yJRb4H X-Received: by 2002:a17:902:5ac1:: with SMTP id g1-v6mr45379974plm.43.1525867065920; Wed, 09 May 2018 04:57:45 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525867065; cv=none; d=google.com; s=arc-20160816; b=ww4QcIBHPETzZC5fo4bQjOVrgn5WX+Z3/gQCkZCTmg4uwmyp1UVqZ510lEDoQyoS/3 CU63zx/VarzZwUPkJywOjZ3TIyZWDKCcL2Fkmvgrwx0bDaFzOjddwOdNIdlvkQWHJkWX JlZmxeHjey783Jmgul8/4PlauGgjLdzMxt4hqX+aLiKEfFMWjO/K+NA7mxEdJcsNUyJa XJBnVdrT7ULSXhjH1/w6f+pcDlhd7olPTEGztLqntTMTy+VHHmR1Jgnd+6p1nh3x83gL 2eah76g0OvvRWK5nu+iFrBDdzprz8nvqGehPwZ+paMtLwQnCFQiFjTZbmMiL9LXvws7B bgQw== 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=KwKJSfJIVT8SCA36duhc8fd3RgXCJlHI/E80Lh/XChE=; b=nddgVkWcyPfEFql8uqdt5DQfJd8gWlJQD7T6APJy/1Atvr8e6fJEckkrj/JQZmJpDO +TXxyZ6X5Bnn5RCBjyfJzNqsPCtvMCuU9wvu+++k+ncZ/v4rK9lOHQeiQfqpzCE4IveP VVypbQzvOh2nSz6lUlFo+3et+MZdMkbTBW3/PPd9RgVMzs3cj5L+mn+XKkQ3gzBqswAG C9acLndGFAk2G9aC5uwnBzlJTFs5h9yx3YZGRwIaZ3vdZISyBPW9qt5jmVeGrguimC7x 4UE97GtjGmF2tbi+PcK+XdcpeslAD0jVR9aiS2VvraFKe2Z1zAjZkhrG6m9vZB96lZWg YssQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=uPPhSFel; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (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 q6si25710453pfh.17.2018.05.09.04.57.45; Wed, 09 May 2018 04:57:45 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=uPPhSFel; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934761AbeEIL5n (ORCPT + 29 others); Wed, 9 May 2018 07:57:43 -0400 Received: from lelnx194.ext.ti.com ([198.47.27.80]:56179 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934433AbeEIL5j (ORCPT ); Wed, 9 May 2018 07:57:39 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by lelnx194.ext.ti.com (8.15.1/8.15.1) with ESMTP id w49BvW8u003502; Wed, 9 May 2018 06:57:32 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1525867052; bh=KwKJSfJIVT8SCA36duhc8fd3RgXCJlHI/E80Lh/XChE=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=uPPhSFel7dUMdZiAKsLzQdtRxnyBMgs8lTYBXDLBlZ6xnSIkYX5hv7t19IffLwiin EnPd6/DU7OySEfaXY87+PYDSZTAtbyoH26Q3OsbghTIFIvnoIao64NQr8ddHYeLrA6 4IRwJwVrMeCQ5wVthL0fpiwEuZ5/wYLiD51aeQkQ= Received: from DFLE110.ent.ti.com (dfle110.ent.ti.com [10.64.6.31]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id w49BvWi1008017; Wed, 9 May 2018 06:57:32 -0500 Received: from DFLE113.ent.ti.com (10.64.6.34) 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; Wed, 9 May 2018 06:57:31 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1466.3 via Frontend Transport; Wed, 9 May 2018 06:57:31 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w49BvVjN001313; Wed, 9 May 2018 06:57:31 -0500 Received: from localhost (a0272616local-lt.dhcp.ti.com [172.22.166.20]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id w49BvVx24050; Wed, 9 May 2018 06:57:31 -0500 (CDT) From: Dan Murphy To: , , , , CC: , , , Dan Murphy Subject: [PATCH v3 2/2] leds: lm3601x: Introduce the lm3601x LED driver Date: Wed, 9 May 2018 06:57:27 -0500 Message-ID: <20180509115727.12070-2-dmurphy@ti.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20180509115727.12070-1-dmurphy@ti.com> References: <20180509115727.12070-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 --- 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 | 611 ++++++++++++++++++++++++++++++++++++ 3 files changed, 621 insertions(+) create mode 100644 drivers/leds/leds-lm3601x.c -- 2.17.0.582.gccdcbd54c 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..877d69449a91 --- /dev/null +++ b/drivers/leds/leds-lm3601x.c @@ -0,0 +1,611 @@ +// 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_STROBE 0x1 +#define LM3601X_LED_IR 0x2 + +/* 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 + +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 + * @cdev_torch: led class device pointer for the torch + * @cdev_ir: led class device pointer for infrared + * @fled_cdev: flash led class device pointer + * @strobe_node: DT device node for the strobe + * @torch: LED label for the torch + * @strobe: LED label for the strobe + * @ir: LED label for the infrared + * @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 + */ +struct lm3601x_led { + struct mutex lock; + struct regmap *regmap; + struct i2c_client *client; + + struct led_classdev cdev_torch; + struct led_classdev cdev_ir; + + struct led_classdev_flash fled_cdev; + + struct device_node *strobe_node; + struct device_node *torch_node; + struct device_node *ir_node; + + char torch[LED_MAX_NAME_SIZE]; + char strobe[LED_MAX_NAME_SIZE]; + char ir[LED_MAX_NAME_SIZE]; + + unsigned int last_flag; + unsigned int strobe_timeout; + + u32 torch_current_max; + u32 strobe_current_max; + u32 max_strobe_timeout; +}; + +static const struct lm3601x_max_timeouts strobe_timeouts[] = { + { 40, 0x00 }, + { 80, 0x01 }, + { 120, 0x02 }, + { 160, 0x03 }, + { 200, 0x04 }, + { 240, 0x05 }, + { 280, 0x06 }, + { 320, 0x07 }, + { 360, 0x08 }, + { 400, 0x09 }, + { 600, 0x0a }, + { 800, 0x0b }, + { 1000, 0x0c }, + { 1200, 0x0d }, + { 1400, 0x0e }, + { 1600, 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_FLAT, + .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 = flags_val; + + return led->last_flag; +} + +static int lm3601x_torch_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lm3601x_led *led = + container_of(cdev, struct lm3601x_led, cdev_torch); + 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_TORCH, 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, + LM3601X_MODE_TORCH, + LM3601X_MODE_TORCH); + +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 = sizeof(strobe_timeouts) / sizeof(strobe_timeouts[0]); + 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, + 0x1e, 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); + + if (timeout > led->max_strobe_timeout) + ret = -EINVAL; + else + 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_ir_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lm3601x_led *led = + container_of(cdev, struct lm3601x_led, cdev_ir); + 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, + 0xfe, 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); + if (ret < 0) + goto out; + + ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG, + LM3601X_MODE_IR_DRV, + LM3601X_MODE_IR_DRV); + +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; + + if (led->torch_node) { + led->cdev_torch.name = led->torch; + led->cdev_torch.max_brightness = LED_FULL; + led->cdev_torch.brightness_set_blocking = lm3601x_torch_brightness_set; + err = devm_led_classdev_register(&led->client->dev, + &led->cdev_torch); + if (err < 0) + return err; + } + + if (led->strobe_node) { + 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); + if (err < 0) + return err; + } + + if (led->ir_node) { + led->cdev_ir.name = led->ir; + led->cdev_ir.max_brightness = LED_FULL; + led->cdev_ir.brightness_set_blocking = + lm3601x_ir_brightness_set; + + err = devm_led_classdev_register(&led->client->dev, + &led->cdev_ir); + } + + 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; + int ret = -ENODEV; + + for_each_available_child_of_node(node, child_node) { + u32 id = 0; + + of_property_read_u32(child_node, "reg", &id); + + switch (id) { + case LM3601X_LED_TORCH: + led->torch_node = of_node_get(child_node); + break; + case LM3601X_LED_STROBE: + led->strobe_node = of_node_get(child_node); + break; + case LM3601X_LED_IR: + led->ir_node = of_node_get(child_node); + break; + default: + dev_warn(&led->client->dev, + "unknown LED %u encountered, ignoring\n", id); + break; + } + } + + if (led->torch_node) { + ret = of_property_read_string(led->torch_node, "label", &name); + if (!ret) + snprintf(led->torch, sizeof(led->torch), + "%s:%s", led->torch_node->name, name); + else + snprintf(led->torch, sizeof(led->torch), + "%s:torch", led->torch_node->name); + ret = of_property_read_u32(led->torch_node, "led-max-microamp", + &led->torch_current_max); + if (ret < 0) { + led->torch_current_max = LM3601X_MIN_TORCH_I_UA; + dev_warn(&led->client->dev, + "led-max-microamp DT property missing\n"); + } + } + + if (led->strobe_node) { + ret = of_property_read_string(led->strobe_node, "label", &name); + if (!ret) + snprintf(led->strobe, sizeof(led->strobe), + "%s:%s", led->strobe_node->name, name); + else + snprintf(led->strobe, sizeof(led->strobe), + "%s::strobe", led->strobe_node->name); + + ret = of_property_read_u32(led->strobe_node, + "flash-max-microamp", + &led->strobe_current_max); + if (ret < 0) { + led->strobe_current_max = LM3601X_MIN_STROBE_I_MA; + dev_warn(&led->client->dev, + "flash-max-microamp DT property missing\n"); + } + + ret = of_property_read_u32(led->strobe_node, + "flash-max-timeout-us", + &led->max_strobe_timeout); + if (ret < 0) { + led->max_strobe_timeout = strobe_timeouts[0].reg_val; + dev_warn(&led->client->dev, + "flash-max-timeout-us DT property missing\n"); + } + + lm3601x_init_flash_timeout(led); + + } + + if (led->ir_node) { + ret = of_property_read_string(led->ir_node, "label", &name); + if (!ret) + snprintf(led->ir, sizeof(led->ir), + "%s:%s", led->ir_node->name, name); + else + snprintf(led->ir, sizeof(led->ir), + "%s::infrared", led->ir_node->name); + } + + 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_write(led->regmap, LM3601X_ENABLE_REG, 0); + + 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");