From patchwork Fri Jan 18 13:42:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 10770157 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5E09C17FB for ; Fri, 18 Jan 2019 13:43:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4D6612E5AF for ; Fri, 18 Jan 2019 13:43:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 412FF2E5B4; Fri, 18 Jan 2019 13:43:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B2E482E5AF for ; Fri, 18 Jan 2019 13:43:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727784AbfARNnj (ORCPT ); Fri, 18 Jan 2019 08:43:39 -0500 Received: from mail-wr1-f66.google.com ([209.85.221.66]:36124 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727854AbfARNnU (ORCPT ); Fri, 18 Jan 2019 08:43:20 -0500 Received: by mail-wr1-f66.google.com with SMTP id u4so15125464wrp.3 for ; Fri, 18 Jan 2019 05:43:19 -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=KkzVP3QcY5pUSFATtiQjGoFup8VMxpPvK5ZMUkSUxAM=; b=Lw6XqOoN9YcTWqwlXeTVIirP3LSYGHzAAX8XE3Q3Yegj6j7vGygj+/tZg9ZZ9cWnPt BaeUhe7ccvQZDdvKf1Qx2LoNKx9qycmsoEnJBmJzbVovZu+uBj438to/O1kFJdQocUHV qJ7QJcS/W03Wym7gboncZnIu8a38oiuVmGuPNZGOvRp8qNCib8ET3XNsp2DZLUa2qi61 MN8xSDXWBmUnmGM4TV049bdtYEVd7uTCBifcAvjcPbDPhUOWZSY4JqBjkps2/utQmf1Y zG792rFuBv/9QMegBHiQ11tljtwtn8OrsAEVBl07VK/tOQ7ngOJUI15bkwsrlDUCxAtb b4/A== 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=KkzVP3QcY5pUSFATtiQjGoFup8VMxpPvK5ZMUkSUxAM=; b=efduUqMP1Y9xHE6av9nr753YNoii4C+uu7y5fR6oVwhnZMUoWeeo73OAjK0usVaCKh 7+rH466rbFN/Ldkp82DEwfbJtvmY8Gkn0RXPPxBBoq/2hHDXj+bZJ97mUPN8iVntzXwg HZCGnWF8zX0yoNKJ2nU62PMsj1WvhcHQJwPIx2NG4pl6DrYM9z1ohmbnwFi+kG5K95Ms EJJ7YynUNGMQmIW+5ubL7kdnAtTMOe2zuOJfP8zsHWifo1bOVvATmJb9C1tVlHi1Xqar otArTQjH8hwsUNyGFmspPiJ7RZIJOZviWz0I+kxiUlxOGTgadrxZ+e7Sa8AUEu3997Jy 9i4w== X-Gm-Message-State: AJcUukdOpt6xkpEUhm4b/SGX8Y4GH2Q7el7SvE1EBp5P3RiVYNWwqsQB SF9cPQFl99Pf0cJBOU6R41iXGA== X-Google-Smtp-Source: ALg8bN4J0ZA9v9dtSVKwDj7dxnczDgJiqTwEgLyT/iQwggz7WXQX2/rNBQdF9u8Mgbo6rA4wXvDx1Q== X-Received: by 2002:adf:ef0d:: with SMTP id e13mr16425427wro.29.1547818998916; Fri, 18 Jan 2019 05:43:18 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id a132sm51033934wmh.5.2019.01.18.05.43.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 18 Jan 2019 05:43:18 -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 11/13] leds: max77650: add LEDs support Date: Fri, 18 Jan 2019 14:42:42 +0100 Message-Id: <20190118134244.22253-12-brgl@bgdev.pl> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190118134244.22253-1-brgl@bgdev.pl> References: <20190118134244.22253-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 | 162 +++++++++++++++++++++++++++++++++++ 3 files changed, 169 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..be2bb1c60448 --- /dev/null +++ b/drivers/leds/leds-max77650.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 BayLibre SAS + * Author: Bartosz Golaszewski + * + * LEDS 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_leds; + +struct max77650_led { + struct led_classdev cdev; + struct max77650_leds *parent; + unsigned int regA; + unsigned int regB; +}; + +struct max77650_leds { + struct regmap *map; + struct max77650_led leds[MAX77650_NUM_LEDS]; +}; + +static struct max77650_led *max77650_to_led(struct led_classdev *cdev) +{ + return container_of(cdev, struct max77650_led, cdev); +} + +static int max77650_leds_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct max77650_led *led = max77650_to_led(cdev); + struct regmap *regmap = led->parent->map; + 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(regmap, led->regA, mask, val); +} + +static int max77650_leds_probe(struct platform_device *pdev) +{ + struct device_node *of_node, *child; + struct max77650_leds *leds; + struct max77650_led *led; + struct device *parent; + struct device *dev; + int rv, num_leds; + u32 reg; + + dev = &pdev->dev; + parent = dev->parent; + of_node = dev->of_node; + + if (!of_node) + return -ENODEV; + + leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL); + if (!leds) + return -ENOMEM; + + leds->map = dev_get_regmap(dev->parent, NULL); + if (!leds->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->leds[reg]; + + led->parent = leds; + led->regA = MAX77650_LED_A_BASE + reg; + led->regB = MAX77650_LED_B_BASE + reg; + led->cdev.brightness_set_blocking + = max77650_leds_brightness_set; + + led->cdev.name = of_get_property(child, "label", NULL); + if (!led->cdev.name) + led->cdev.name = child->name; + + 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(leds->map, led->regA, + MAX77650_LED_A_DEFAULT); + if (rv) + return rv; + + rv = regmap_write(leds->map, led->regB, + MAX77650_LED_B_DEFAULT); + if (rv) + return rv; + } + + rv = regmap_write(leds->map, + MAX77650_REG_CNFG_LED_TOP, + MAX77650_LED_TOP_DEFAULT); + if (rv) + return rv; + + return 0; +} + +static struct platform_driver max77650_leds_driver = { + .driver = { + .name = "max77650-leds", + }, + .probe = max77650_leds_probe, +}; +module_platform_driver(max77650_leds_driver); + +MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver"); +MODULE_AUTHOR("Bartosz Golaszewski "); +MODULE_LICENSE("GPL");