From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C94BEC169C4 for ; Tue, 29 Jan 2019 13:36:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8BEA621473 for ; Tue, 29 Jan 2019 13:36:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="AFx6YF6z" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728723AbfA2Ngs (ORCPT ); Tue, 29 Jan 2019 08:36:48 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:35240 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728367AbfA2NgJ (ORCPT ); Tue, 29 Jan 2019 08:36:09 -0500 Received: by mail-wm1-f65.google.com with SMTP id t200so17961698wmt.0 for ; Tue, 29 Jan 2019 05:36:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gB/PvlnxJ7cgc5ND9S5qMtcljY7I1sdDozrdVgxrOqg=; b=AFx6YF6z4O7RiTO3KaT2cj2HtMQDx13LcR8kqoyQLS9VkrMP6bpn8OpkixwWnU+Hcd ixN04Px5ugVuRnf5rXkiq003sX4Q/At+/Yn/FX/jjh0IsOAdQGIiqmsMuAXHsPmv1EZs 5+rUwJ5rjLiF1qGvI2Dbg446icgN3dsFLeN+KgMmPi1lfivmS9iuXD1z9qC7t4+hdU80 DOJP0XCSse2u6wyTkb5OjYWqcftHKPN527SUFd/CRO8JCv5kM8zWrsA3tvf/7eNk3dbx Q1QMKgW97tNNh76/E3ZJfq7iInO4MR2ztKo78fbzAkQf1nfGew+SL8yP1XOr5CBZALFj 63Gg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gB/PvlnxJ7cgc5ND9S5qMtcljY7I1sdDozrdVgxrOqg=; b=om+lKWuATriXyus5m75/njlxIkjS8X9xpNh2cdzcW1z6Sr17Q7BoBXdRzSDlHou0zZ oZAYS+nq6CCPenUJWsY5T6TY9ZFxjWV39PXeNEayNo0BhGfBfh06C8qV3fy/ML4ehntj jTTsCaxAIbhRzLzxq+nc2SlO8dKyvDcqt9OCcI7hgPTAawFyzoEg1gjBdIGC/v8op18a z9v3E01f1x4Jw8+tPELCgfWxQgbJNuU1MHkkr8foI1c2CvanAxqz8WOKhFUe2qPQ6/mw V1WQ94WHDW5SzwI0UDhZIcZ+fUSztU6vzur0NzTJZCB1siFj8Z0AcPM+pwUhH/0Q8rDB ++1w== X-Gm-Message-State: AJcUukdEzC7Y/JdlVeuyv5Z5VeDkcTnzYaJzTbFDfL+a3OfDCd63pFQ6 G3pDX9hmIVM/q5/T15nzMYfgHQ== X-Google-Smtp-Source: ALg8bN5+h4LQ1vlb7h1HcAtXVpRpaBxHzENelRpS1WInZc4UN8okjv6jZ4szwm4YqZj0xX0p0f5TIw== X-Received: by 2002:a1c:b70a:: with SMTP id h10mr20574721wmf.125.1548768967937; Tue, 29 Jan 2019 05:36:07 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id k128sm4367891wmd.37.2019.01.29.05.36.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Jan 2019 05:36:07 -0800 (PST) From: Bartosz Golaszewski To: Rob Herring , Mark Rutland , Linus Walleij , Dmitry Torokhov , Jacek Anaszewski , Pavel Machek , Lee Jones , Sebastian Reichel , Liam Girdwood , Mark Brown , Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v2 11/13] leds: max77650: add LEDs support Date: Tue, 29 Jan 2019 14:35:43 +0100 Message-Id: <20190129133545.1931-13-brgl@bgdev.pl> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190129133545.1931-1-brgl@bgdev.pl> References: <20190129133545.1931-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bartosz Golaszewski This adds basic support for LEDs for the max77650 PMIC. The device has three current sinks for driving LEDs. Signed-off-by: Bartosz Golaszewski --- drivers/leds/Kconfig | 6 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-max77650.c | 152 +++++++++++++++++++++++++++++++++++ 3 files changed, 159 insertions(+) create mode 100644 drivers/leds/leds-max77650.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a72f97fca57b..6e7a8f51eccc 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -608,6 +608,12 @@ config LEDS_TLC591XX This option enables support for Texas Instruments TLC59108 and TLC59116 LED controllers. +config LEDS_MAX77650 + tristate "LED support for Maxim MAX77650 PMIC" + depends on MFD_MAX77650 + help + LEDs driver for MAX77650 family of PMICs from Maxim Integrated." + config LEDS_MAX77693 tristate "LED support for MAX77693 Flash" depends on LEDS_CLASS_FLASH diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 4c1b0054f379..f48b2404dbb7 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o obj-$(CONFIG_LEDS_NS2) += leds-ns2.o obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o +obj-$(CONFIG_LEDS_MAX77650) += leds-max77650.o obj-$(CONFIG_LEDS_MAX77693) += leds-max77693.o obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o diff --git a/drivers/leds/leds-max77650.c b/drivers/leds/leds-max77650.c new file mode 100644 index 000000000000..e3a3c0e79b7a --- /dev/null +++ b/drivers/leds/leds-max77650.c @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2018 BayLibre SAS +// Author: Bartosz Golaszewski +// +// LED driver for MAXIM 77650/77651 charger/power-supply. + +#include +#include +#include +#include +#include +#include + +#define MAX77650_NUM_LEDS 3 + +#define MAX77650_LED_A_BASE 0x40 +#define MAX77650_LED_B_BASE 0x43 + +#define MAX77650_LED_BR_MASK GENMASK(4, 0) +#define MAX77650_LED_EN_MASK GENMASK(7, 6) + +/* Enable EN_LED_MSTR. */ +#define MAX77650_LED_TOP_DEFAULT BIT(0) + +#define MAX77650_LED_ENABLE GENMASK(7, 6) +#define MAX77650_LED_DISABLE 0x00 + +#define MAX77650_LED_A_DEFAULT MAX77650_LED_DISABLE +/* 100% on duty */ +#define MAX77650_LED_B_DEFAULT GENMASK(3, 0) + +struct max77650_led { + struct led_classdev cdev; + struct regmap *map; + unsigned int regA; + unsigned int regB; +}; + +static struct max77650_led *max77650_to_led(struct led_classdev *cdev) +{ + return container_of(cdev, struct max77650_led, cdev); +} + +static int max77650_led_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct max77650_led *led = max77650_to_led(cdev); + int val, mask; + + mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK; + + if (brightness == LED_OFF) { + val = MAX77650_LED_DISABLE; + } else { + val = MAX77650_LED_ENABLE; + /* + * We can set the brightness with 5-bit resolution. + * + * For brightness == 1, the bits we're writing will be 0, but + * since we keep LED_FS0 set to 12.8mA full-scale range, the + * LED will be lit slightly. + */ + val |= brightness / 8; + } + + return regmap_update_bits(led->map, led->regA, mask, val); +} + +static int max77650_led_probe(struct platform_device *pdev) +{ + struct device_node *of_node, *child; + struct max77650_led *leds, *led; + struct device *parent; + struct device *dev; + struct regmap *map; + const char *label; + int rv, num_leds; + u32 reg; + + dev = &pdev->dev; + parent = dev->parent; + of_node = dev->of_node; + + if (!of_node) + return -ENODEV; + + leds = devm_kcalloc(dev, sizeof(*leds), MAX77650_NUM_LEDS, GFP_KERNEL); + if (!leds) + return -ENOMEM; + + map = dev_get_regmap(dev->parent, NULL); + if (!map) + return -ENODEV; + + num_leds = of_get_child_count(of_node); + if (!num_leds || num_leds > MAX77650_NUM_LEDS) + return -ENODEV; + + for_each_child_of_node(of_node, child) { + rv = of_property_read_u32(child, "reg", ®); + if (rv || reg >= MAX77650_NUM_LEDS) + return -EINVAL; + + led = &leds[reg]; + led->map = map; + led->regA = MAX77650_LED_A_BASE + reg; + led->regB = MAX77650_LED_B_BASE + reg; + led->cdev.brightness_set_blocking = max77650_led_brightness_set; + + label = of_get_property(child, "label", NULL); + if (!label) { + led->cdev.name = "max77650::"; + } else { + led->cdev.name = devm_kasprintf(dev, GFP_KERNEL, + "max77650:%s", label); + if (!led->cdev.name) + return -ENOMEM; + } + + of_property_read_string(child, "linux,default-trigger", + &led->cdev.default_trigger); + + rv = devm_of_led_classdev_register(dev, child, &led->cdev); + if (rv) + return rv; + + rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT); + if (rv) + return rv; + + rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT); + if (rv) + return rv; + } + + return regmap_write(map, + MAX77650_REG_CNFG_LED_TOP, + MAX77650_LED_TOP_DEFAULT); +} + +static struct platform_driver max77650_led_driver = { + .driver = { + .name = "max77650-led", + }, + .probe = max77650_led_probe, +}; +module_platform_driver(max77650_led_driver); + +MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver"); +MODULE_AUTHOR("Bartosz Golaszewski "); +MODULE_LICENSE("GPL v2"); -- 2.20.1