From patchwork Wed Jun 5 12:56:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Murphy X-Patchwork-Id: 165878 Delivered-To: patch@linaro.org Received: by 2002:a92:9e1a:0:0:0:0:0 with SMTP id q26csp7305951ili; Wed, 5 Jun 2019 05:56:51 -0700 (PDT) X-Google-Smtp-Source: APXvYqwoA29gXVq4zmt3/9MzslAaVkLCIqBNPpwjYuWmE8awaM6aKUtoYbgVO2gJBhOF+hkKChyi X-Received: by 2002:a63:de43:: with SMTP id y3mr4334730pgi.271.1559739411055; Wed, 05 Jun 2019 05:56:51 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1559739411; cv=none; d=google.com; s=arc-20160816; b=f+1X0ANTyC2kOFeJp+3AsGfAZPukxag8aIHjk54RKrcZGN0TI1XWLiTsPQ57YyL13E B5eGKtag4XZ4rXz6azUNr/PBj3sK+x7knse5Yw1B7JVmvpyDqpP/O4rBYfOSC/EqI0VD d90VOduWVbfk4HysmqR5kxctoNhM2xlgN2H05b/02KZe2W2rtYTnu4YA6K0LvkLuTpRc TS9K1MQTYLTfxdAoA0+I+Rvr+3/a2xglb+MgJELqtCU/gpQvu38OJyOHBR21xCDNea2V 9QbhuxLZCsl++AbkXlqaCkaBz6zEwfrj8UEQ0hCNL6Jde0SZTNZP7YVNIWufv2A4TeTz OLOA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=VtWPS57ssdVHDMp8Yb/arf3w3a52NwTmyrcIYl12xpk=; b=NTSr9jzvgbL09Eha3VXjB58MacFcHUnzdYYUgjw7yK0CTrLQovVFrV6kHWNeRvVs8l p88G8AdOS6pIBa72XTIOeDKeXP3kEGWsSNWeDsfiHJtoAZF19ls1X58ZRp4wnyaHJDiz FGJhq6mKBTnlqrRCZNcNZ+yJ2z7vh9dORkhnBTSr1H/kt4qfxHDpjRYXHVFgQHSxPgTQ 5OGgDpE1JIB9v7pdHFIoXG52zhcAyzBrLuCpJj3n3FMDOIg4ERqGcD1FTpa/Two91H/C 9FocZ6Gy98sEMRpCV2JboSv++o1Z67Gr6O/AH5sjA+iVUIS71AysLmNpQpaBdKTD6TBD 5aKQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=KaFbLFoO; spf=pass (google.com: best guess record for domain of linux-leds-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-leds-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 t16si29047226plm.65.2019.06.05.05.56.50; Wed, 05 Jun 2019 05:56:51 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-leds-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=KaFbLFoO; spf=pass (google.com: best guess record for domain of linux-leds-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-leds-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 S1727813AbfFEM4u (ORCPT + 1 other); Wed, 5 Jun 2019 08:56:50 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:35938 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727870AbfFEM4m (ORCPT ); Wed, 5 Jun 2019 08:56:42 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id x55CuciI099185; Wed, 5 Jun 2019 07:56:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1559739398; bh=VtWPS57ssdVHDMp8Yb/arf3w3a52NwTmyrcIYl12xpk=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=KaFbLFoOK+4GzcQYU4+4HQ7Ai73PMEGoWMGU9lkz+p7qlfri7oKAviQpWqGLcvO0K FtbwX0DEnYl0DWPrGqtSlGOtNB8VHLwCcfrmjcj/Ttdr47OVZfr9YLXsz109Q+6pBg DeHAh/tjQrA0ICE3WWJWTH2eBN0EP/Fu5RrClhU0= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x55CuciJ012186 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 5 Jun 2019 07:56:38 -0500 Received: from DFLE104.ent.ti.com (10.64.6.25) 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 15.1.1713.5; Wed, 5 Jun 2019 07:56:37 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Wed, 5 Jun 2019 07:56:37 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id x55CubFR097869; Wed, 5 Jun 2019 07:56:37 -0500 From: Dan Murphy To: , , , CC: , , , Dan Murphy Subject: [PATCH v6 5/5] leds: lm36274: Introduce the TI LM36274 LED driver Date: Wed, 5 Jun 2019 07:56:34 -0500 Message-ID: <20190605125634.7042-6-dmurphy@ti.com> X-Mailer: git-send-email 2.21.0.5.gaeb582a983 In-Reply-To: <20190605125634.7042-1-dmurphy@ti.com> References: <20190605125634.7042-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-leds-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Introduce the LM36274 LED driver. This driver uses the ti-lmu MFD driver to probe this LED driver. The driver configures only the LED registers and enables the outputs according to the config file. The driver utilizes the TI LMU (Lighting Management Unit) LED common framework to set the brightness bits. Signed-off-by: Dan Murphy Signed-off-by: Jacek Anaszewski --- drivers/leds/Kconfig | 8 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-lm36274.c | 174 ++++++++++++++++++++++++++++++++++++ 3 files changed, 183 insertions(+) create mode 100644 drivers/leds/leds-lm36274.c -- 2.21.0.5.gaeb582a983 Acked-by: Pavel Machek diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 91cb047059a0..61c585049b2d 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -798,6 +798,14 @@ config LEDS_LM3697 Say Y to enable the LM3697 LED driver for TI LMU devices. This supports the LED device LM3697. +config LEDS_LM36274 + tristate "LED driver for LM36274" + depends on LEDS_TI_LMU_COMMON + depends on MFD_TI_LMU + help + Say Y to enable the LM36274 LED driver for TI LMU devices. + This supports the LED device LM36274. + comment "LED Triggers" source "drivers/leds/trigger/Kconfig" diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 6c3350404ede..c52934732c1a 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -83,6 +83,7 @@ obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o obj-$(CONFIG_LEDS_LM3697) += leds-lm3697.o +obj-$(CONFIG_LEDS_LM36274) += leds-lm36274.o # LED SPI Drivers obj-$(CONFIG_LEDS_CR0014114) += leds-cr0014114.o diff --git a/drivers/leds/leds-lm36274.c b/drivers/leds/leds-lm36274.c new file mode 100644 index 000000000000..b47786d36d21 --- /dev/null +++ b/drivers/leds/leds-lm36274.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0 +// TI LM36274 LED chip family driver +// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include + +#define LM36274_MAX_STRINGS 4 +#define LM36274_BL_EN BIT(4) + +/** + * struct lm36274 + * @pdev: platform device + * @led_dev: led class device + * @lmu_data: Register and setting values for common code + * @regmap: Devices register map + * @dev: Pointer to the devices device struct + * @led_sources - The LED strings supported in this array + * @num_leds - Number of LED strings are supported in this array + */ +struct lm36274 { + struct platform_device *pdev; + struct led_classdev led_dev; + struct ti_lmu_bank lmu_data; + struct regmap *regmap; + struct device *dev; + + u32 led_sources[LM36274_MAX_STRINGS]; + int num_leds; +}; + +static int lm36274_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brt_val) +{ + struct lm36274 *led = container_of(led_cdev, struct lm36274, led_dev); + + return ti_lmu_common_set_brightness(&led->lmu_data, brt_val); +} + +static int lm36274_init(struct lm36274 *lm36274_data) +{ + int enable_val = 0; + int i; + + for (i = 0; i < lm36274_data->num_leds; i++) + enable_val |= (1 << lm36274_data->led_sources[i]); + + if (!enable_val) { + dev_err(lm36274_data->dev, "No LEDs were enabled\n"); + return -EINVAL; + } + + enable_val |= LM36274_BL_EN; + + return regmap_write(lm36274_data->regmap, LM36274_REG_BL_EN, + enable_val); +} + +static int lm36274_parse_dt(struct lm36274 *lm36274_data) +{ + struct fwnode_handle *child = NULL; + char label[LED_MAX_NAME_SIZE]; + struct device *dev = &lm36274_data->pdev->dev; + const char *name; + int child_cnt; + int ret = -EINVAL; + + /* There should only be 1 node */ + child_cnt = device_get_child_node_count(dev); + if (child_cnt != 1) + return ret; + + device_for_each_child_node(dev, child) { + ret = fwnode_property_read_string(child, "label", &name); + if (ret) + snprintf(label, sizeof(label), + "%s::", lm36274_data->pdev->name); + else + snprintf(label, sizeof(label), + "%s:%s", lm36274_data->pdev->name, name); + + lm36274_data->num_leds = fwnode_property_read_u32_array(child, + "led-sources", + NULL, 0); + if (lm36274_data->num_leds <= 0) + return -ENODEV; + + ret = fwnode_property_read_u32_array(child, "led-sources", + lm36274_data->led_sources, + lm36274_data->num_leds); + if (ret) { + dev_err(dev, "led-sources property missing\n"); + return -EINVAL; + } + + fwnode_property_read_string(child, "linux,default-trigger", + &lm36274_data->led_dev.default_trigger); + + } + + lm36274_data->lmu_data.regmap = lm36274_data->regmap; + lm36274_data->lmu_data.max_brightness = MAX_BRIGHTNESS_11BIT; + lm36274_data->lmu_data.msb_brightness_reg = LM36274_REG_BRT_MSB; + lm36274_data->lmu_data.lsb_brightness_reg = LM36274_REG_BRT_LSB; + + lm36274_data->led_dev.name = label; + lm36274_data->led_dev.max_brightness = MAX_BRIGHTNESS_11BIT; + lm36274_data->led_dev.brightness_set_blocking = lm36274_brightness_set; + + return ret; +} + +static int lm36274_probe(struct platform_device *pdev) +{ + struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent); + struct lm36274 *lm36274_data; + int ret; + + lm36274_data = devm_kzalloc(&pdev->dev, sizeof(*lm36274_data), + GFP_KERNEL); + if (!lm36274_data) { + ret = -ENOMEM; + return ret; + } + + lm36274_data->pdev = pdev; + lm36274_data->dev = lmu->dev; + lm36274_data->regmap = lmu->regmap; + dev_set_drvdata(&pdev->dev, lm36274_data); + + ret = lm36274_parse_dt(lm36274_data); + if (ret) { + dev_err(lm36274_data->dev, "Failed to parse DT node\n"); + return ret; + } + + ret = lm36274_init(lm36274_data); + if (ret) { + dev_err(lm36274_data->dev, "Failed to init the device\n"); + return ret; + } + + return devm_led_classdev_register(lm36274_data->dev, + &lm36274_data->led_dev); +} + +static const struct of_device_id of_lm36274_leds_match[] = { + { .compatible = "ti,lm36274-backlight", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_lm36274_leds_match); + +static struct platform_driver lm36274_driver = { + .probe = lm36274_probe, + .driver = { + .name = "lm36274-leds", + }, +}; +module_platform_driver(lm36274_driver) + +MODULE_DESCRIPTION("Texas Instruments LM36274 LED driver"); +MODULE_AUTHOR("Dan Murphy "); +MODULE_LICENSE("GPL v2");