From nobody Sat Feb 7 16:20:40 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F13E4C3DA6F for ; Wed, 23 Aug 2023 21:24:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237355AbjHWVX5 (ORCPT ); Wed, 23 Aug 2023 17:23:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234548AbjHWVX0 (ORCPT ); Wed, 23 Aug 2023 17:23:26 -0400 Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B76C10C8 for ; Wed, 23 Aug 2023 14:23:24 -0700 (PDT) Received: by mail-lf1-x12f.google.com with SMTP id 2adb3069b0e04-5007abb15e9so6455184e87.0 for ; Wed, 23 Aug 2023 14:23:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; t=1692825802; x=1693430602; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=ZCyOWk315MjZGxocWN7FVy6YgQBrW4jjk6j3HuEtPcg=; b=HqDu5/k7h5AKi5rWm+6EEWb/8Hs9Kkcn02IAL/PADtVQhlpZQGyiHh2IeSTVBzUD9w 8lHYdxcWG5/Rp8w5nCuz2k/Quq8OgbdD1DIXfYp2K8C1uzCtf1mZwFtfOyzJV2whPfhU +frvEfokyX8Oa6kJk+hllDVEbp7V6Yhq3hcfvMW6OBWbwSMy03ZJNmyyrLZIj7ZB4NYc LbDnlO12iVaOAUiOzut7obe8gclqzYQDz3H5ZHVceSwzyY7OPe4MedyzF0pxUpeAKv9U nednggDod5izuIqK8qCbdyS6SVDSya+upVqYxeKVvdp7xJ7wQNTKrCmIRm+RhlF6JZTq QYQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692825802; x=1693430602; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ZCyOWk315MjZGxocWN7FVy6YgQBrW4jjk6j3HuEtPcg=; b=F+F2rwm8jLrePgWI+Y/cnADqLbIoUNS/4346czH9+dAK9gUwIoBI/PPfhL8n0yXg01 XGAmmjRdG98evDpkFkr1mZyQEqgxbZQ+rN7ksjljk6WOW9toGmp/r+sExao8s9JZ7W4K 5tE0AsmXU89bAzmWGZr1gOxs82EJAuiqV25hAhtkQ4rq3Biglnz4wITIuTpGUHsh3Uwz /BfXWqZJh6Y9eeMpce7wD53YVhme2/e4eaMU9jJib//3Tpwjq94bOBRLxLbFeAhiB5bi QCGdsyT39vK005CUOjXUu0GN4SsCZURy0Y0NQ3YT5A1aVTdJQhQzwOzlbKBEuT90ZHMu SYNA== X-Gm-Message-State: AOJu0Yy+GQ+B9vNiVpsfxLSoOkjxDyXPhFjFUH35wXyFgDihWQt4DsN+ IQ8MpQp1L/Vl6TbTiq+vnbPDdw== X-Google-Smtp-Source: AGHT+IFWLcoQ9yFZz5y1bxGXDZKh8AhF7aEPKsJhTeShSI0jx6IJQvvoTXzjPWJlknxJ9p3fOUDYEQ== X-Received: by 2002:a19:6d1b:0:b0:4fb:89cd:9616 with SMTP id i27-20020a196d1b000000b004fb89cd9616mr8757794lfc.0.1692825802307; Wed, 23 Aug 2023 14:23:22 -0700 (PDT) Received: from stroh80.sec.9e.network (ip-078-094-000-051.um19.pools.vodafone-ip.de. [78.94.0.51]) by smtp.gmail.com with ESMTPSA id b12-20020aa7c90c000000b005254b41f507sm9608171edt.32.2023.08.23.14.23.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Aug 2023 14:23:21 -0700 (PDT) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: Pavel Machek , Lee Jones Cc: Patrick Rudolph , Naresh Solanki , linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org Subject: [PATCH] leds: max5970: Add support for max5970 Date: Wed, 23 Aug 2023 23:23:07 +0200 Message-ID: <20230823212309.1463769-1-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Patrick Rudolph The MAX5970 is hot swap controller and has 4 indication LED. Signed-off-by: Patrick Rudolph Signed-off-by: Naresh Solanki --- drivers/leds/Kconfig | 11 +++ drivers/leds/Makefile | 1 + drivers/leds/leds-max5970.c | 129 ++++++++++++++++++++++++++++++++++++ 3 files changed, 141 insertions(+) create mode 100644 drivers/leds/leds-max5970.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index b92208eccdea..03ef527cc545 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -637,6 +637,17 @@ config LEDS_ADP5520 To compile this driver as a module, choose M here: the module will be called leds-adp5520. =20 +config LEDS_MAX5970 + tristate "LED Support for Maxim 5970" + depends on LEDS_CLASS + depends on MFD_MAX5970 + help + This option enables support for the Maxim MAX5970 & MAX5978 smart + switch indication LEDs via the I2C bus. + + To compile this driver as a module, choose M here: the module will + be called leds-max5970. + config LEDS_MC13783 tristate "LED Support for MC13XXX PMIC" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index d7348e8bc019..6eaee0a753c6 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_LEDS_LP8501) +=3D leds-lp8501.o obj-$(CONFIG_LEDS_LP8788) +=3D leds-lp8788.o obj-$(CONFIG_LEDS_LP8860) +=3D leds-lp8860.o obj-$(CONFIG_LEDS_LT3593) +=3D leds-lt3593.o +obj-$(CONFIG_LEDS_MAX5970) +=3D leds-max5970.o obj-$(CONFIG_LEDS_MAX77650) +=3D leds-max77650.o obj-$(CONFIG_LEDS_MAX8997) +=3D leds-max8997.o obj-$(CONFIG_LEDS_MC13783) +=3D leds-mc13783.o diff --git a/drivers/leds/leds-max5970.c b/drivers/leds/leds-max5970.c new file mode 100644 index 000000000000..5be1b927f39e --- /dev/null +++ b/drivers/leds/leds-max5970.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Device driver for leds in MAX5970 and MAX5978 IC + * + * Copyright (c) 2022 9elements GmbH + * + * Author: Patrick Rudolph + */ + +#include +#include +#include +#include +#include + +#define ldev_to_maxled(c) container_of(c, struct max5970_led, cdev) + +struct max5970_led { + struct device *dev; + struct regmap *regmap; + struct led_classdev cdev; + unsigned int index; +}; + +static int max5970_led_set_brightness(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct max5970_led *ddata =3D ldev_to_maxled(cdev); + int ret, val; + + if (!ddata->regmap) + return -ENODEV; + + /* Set/clear corresponding bit for given led index */ + val =3D !brightness ? BIT(ddata->index) : 0; + + ret =3D regmap_update_bits(ddata->regmap, MAX5970_REG_LED_FLASH, BIT(ddat= a->index), val); + if (ret < 0) + dev_err(cdev->dev, "failed to set brightness %d", ret); + + return ret; +} + +static int max5970_setup_led(struct max5970_led *ddata, struct regmap *reg= map, + struct device_node *nc, u32 reg) +{ + int ret; + + if (of_property_read_string(nc, "label", &ddata->cdev.name)) + ddata->cdev.name =3D nc->name; + + ddata->cdev.max_brightness =3D 1; + ddata->cdev.brightness_set_blocking =3D max5970_led_set_brightness; + ddata->cdev.default_trigger =3D "none"; + + ret =3D devm_led_classdev_register(ddata->dev, &ddata->cdev); + if (ret) + dev_err(ddata->dev, "Error initializing LED %s", ddata->cdev.name); + + return ret; +} + +static int max5970_led_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct device_node *np =3D dev_of_node(dev->parent); + struct regmap *regmap; + struct device_node *led_node; + struct device_node *child; + struct max5970_led *ddata[MAX5970_NUM_LEDS]; + int ret =3D -ENODEV, num_leds =3D 0; + + regmap =3D dev_get_regmap(pdev->dev.parent, NULL); + if (!regmap) + return -EPROBE_DEFER; + + led_node =3D of_get_child_by_name(np, "leds"); + if (!led_node) + return -ENODEV; + + for_each_available_child_of_node(led_node, child) { + u32 reg; + + if (of_property_read_u32(child, "reg", ®)) + continue; + + if (reg >=3D MAX5970_NUM_LEDS) { + dev_err(dev, "invalid LED (%u >=3D %d)\n", reg, MAX5970_NUM_LEDS); + continue; + } + + ddata[num_leds] =3D devm_kzalloc(dev, sizeof(struct max5970_led), GFP_KE= RNEL); + if (!ddata[num_leds]) { + ret =3D -ENOMEM; + goto exit; + } + + ddata[num_leds]->index =3D reg; + ddata[num_leds]->regmap =3D regmap; + ddata[num_leds]->dev =3D dev; + + ret =3D max5970_setup_led(ddata[num_leds], regmap, child, reg); + if (ret < 0) { + dev_err(dev, "Failed to initialize LED %u\n", reg); + goto exit; + } + num_leds++; + } + + return ret; + +exit: + for (int j =3D 0; j < num_leds; j++) + devm_led_classdev_unregister(dev, &ddata[j]->cdev); + + return ret; +} + +static struct platform_driver max5970_led_driver =3D { + .driver =3D { + .name =3D "max5970-led", + }, + .probe =3D max5970_led_probe, +}; + +module_platform_driver(max5970_led_driver); +MODULE_AUTHOR("Patrick Rudolph "); +MODULE_DESCRIPTION("MAX5970_hot-swap controller LED driver"); +MODULE_LICENSE("GPL"); base-commit: baca986e1f2c31f8e4b2a6d99d47c3bc844033e8 --=20 2.41.0