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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 867F3C43334 for ; Thu, 7 Jul 2022 13:42:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235965AbiGGNmO (ORCPT ); Thu, 7 Jul 2022 09:42:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235968AbiGGNlz (ORCPT ); Thu, 7 Jul 2022 09:41:55 -0400 Received: from mail-ej1-x634.google.com (mail-ej1-x634.google.com [IPv6:2a00:1450:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0433524971 for ; Thu, 7 Jul 2022 06:41:54 -0700 (PDT) Received: by mail-ej1-x634.google.com with SMTP id os14so2256944ejb.4 for ; Thu, 07 Jul 2022 06:41:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=bDCTJrI1zdZJoGe/yArvDEW3LAIX1C7pupl+sZWFohc=; b=LUadlLlRFiQCDkTi0qW4TyzoS1IRiWz5I5W2HSGe2ibGUc5F4S9fhhmRQve12jX9X7 v23Dm4cZImzLVVCjLk1IBm7dsi4LW6UEJc7cM+DsTXrinsoDHj/SxLeJDOs+xWwfmz/+ SyFrDk2E7aVvbHSTor30iDDVmDNTX2QD202v9Ql2IlGPndYArTrmotEF0ag41+P35pUt EcGVnD7N3ViMOBCq69OybzRwTLVr8AXzYJeUdRjnv+kMO4H1WJfeoJm9tfMll09oYchC 6MrZn7V0uFkVfLkAawaFW0XYkNa5pU4SRsyju6lK/5vZ3XAho7ZR7vGDcgTEVP3Gs1HO /lFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bDCTJrI1zdZJoGe/yArvDEW3LAIX1C7pupl+sZWFohc=; b=N2p/vsmS56dRPL8WHFShr12SdxAAc+Xpnr4wJk8k2zQYrWs18upucAu7yLMhMQpBwz xNYaUT0+UQwohl0zJ4ZCM/fBiYpbYVsaMQl3Ql6ataFQP9/eQOnCOTUZHHlKDls+x2m1 ft0cRbsTDCSChx9GyCRc/us4ncFwF9QsO3iooNVj9cW7ib/vXOtAe9t9ewmUV2PixhgY qyotSxJgDzahMStjKtSF+SMP5RIAgrZkpqOy0fi0hgc69aFmUeoKp2f/zqLKYN+O9ChP 8IBSJbH5bAN//wnf5+lAPyyPHE8ZqnlYCVCvmB//SUyWrjo7vtQbjEWT6j/qw5ndjede j5mg== X-Gm-Message-State: AJIora8iDB+Rlag2QB4sJNP8VTs1lmurXeL9hLUK5XP3fUr5UrjAY29K xBZc3cuN7Qkk4zoYzSadDDTOtE10N1oXJulI X-Google-Smtp-Source: AGRyM1uF6t8vryvFi8UqoPp7a1RGjGj9CGud6t5Rj2uxS8HWtOy5Y2xWWTd/esdEfNAZe6Rwos5mrQ== X-Received: by 2002:a17:906:9c82:b0:6df:c5f0:d456 with SMTP id fj2-20020a1709069c8200b006dfc5f0d456mr45926311ejc.287.1657201312303; Thu, 07 Jul 2022 06:41:52 -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 eg37-20020a05640228a500b0043a587eb95dsm9550141edb.5.2022.07.07.06.41.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Jul 2022 06:41:51 -0700 (PDT) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: linux-kernel@vger.kernel.org, Pavel Machek Cc: Patrick Rudolph , Naresh Solanki Subject: [PATCH v2 5/5] leds: max597x: Add support for max597x Date: Thu, 7 Jul 2022 15:41:41 +0200 Message-Id: <20220707134141.1172300-6-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220707134141.1172300-1-Naresh.Solanki@9elements.com> References: <20220707134141.1172300-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Patrick Rudolph max597x is hot swap controller with indication led support. This driver uses DT property to configure led during boot time & also provide the led control in sysfs. Signed-off-by: Patrick Rudolph Signed-off-by: Naresh Solanki --- drivers/leds/Kconfig | 10 +++ drivers/leds/Makefile | 1 + drivers/leds/leds-max597x.c | 130 ++++++++++++++++++++++++++++++++++++ 3 files changed, 141 insertions(+) create mode 100644 drivers/leds/leds-max597x.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a49979f41eee..64070cadac31 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -598,6 +598,16 @@ config LEDS_ADP5520 To compile this driver as a module, choose M here: the module will be called leds-adp5520. +config LEDS_MAX597X + tristate "Maxim 597x leds" + depends on I2C + depends on OF + depends on LEDS_CLASS + depends MFD_MAX597X + help + This driver controls a Maxim 5970/5978 indication led via I2C bus. + The MAX5970/5978 is a smart switch with 4 indication leds + config LEDS_MC13783 tristate "LED Support for MC13XXX PMIC" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 4fd2f92cd198..c44b0e9559ab 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_LEDS_LP8501) += leds-lp8501.o obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o obj-$(CONFIG_LEDS_LP8860) += leds-lp8860.o obj-$(CONFIG_LEDS_LT3593) += leds-lt3593.o +obj-$(CONFIG_LEDS_MAX597X) += leds-max597x.o obj-$(CONFIG_LEDS_MAX77650) += leds-max77650.o obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o diff --git a/drivers/leds/leds-max597x.c b/drivers/leds/leds-max597x.c new file mode 100644 index 000000000000..645d6cdcfa34 --- /dev/null +++ b/drivers/leds/leds-max597x.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Device driver for regulators in MAX5970 and MAX5978 IC + * + * Copyright (c) 2022 9elements GmbH + * + * Author: Patrick Rudolph + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct max597x_led { + struct regmap *regmap; + struct led_classdev led; + unsigned int index; +}; + +static int max597x_led_set_brightness(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct max597x_led *led = cdev->driver_data; + int ret; + + if (!led || !led->regmap) + return -1; + + ret = regmap_update_bits(led->regmap, MAX5970_REG_LED_FLASH, + 1 << led->index, ~brightness << led->index); + if (ret < 0) + dev_err(cdev->dev, "failed to set brightness %d\n", ret); + return ret; +} + +static int max597x_led(struct max597x_data *max597x, struct device_node *nc, u32 reg) +{ + struct max597x_led *led; + const char *state; + int ret = 0; + + led = devm_kzalloc(max597x->dev, sizeof(struct max597x_led), + GFP_KERNEL); + if (!led) + return -ENOMEM; + + if (of_property_read_string(nc, "label", &led->led.name)) + led->led.name = nc->name; + + led->led.max_brightness = 1; + led->led.brightness_set_blocking = max597x_led_set_brightness; + led->led.default_trigger = "none"; + led->index = reg; + led->regmap = max597x->regmap; + ret = led_classdev_register(max597x->dev, &led->led); + if (ret) { + dev_err(max597x->dev, "Error in initializing led %s", led->led.name); + devm_kfree(max597x->dev, led); + return ret; + } + led->led.driver_data = led; + led->led.dev = max597x->dev; + if (!of_property_read_string(nc, "default-state", &state)) { + if (!strcmp(state, "on")) { + led->led.brightness = 1; + led_set_brightness(&led->led, led->led.brightness); + } + } + return 0; +} + +static int max597x_led_probe(struct platform_device *pdev) +{ + + + struct max597x_data *max597x = dev_get_drvdata(pdev->dev.parent); + struct device_node *np = dev_of_node(pdev->dev.parent); + struct device_node *led_node; + struct device_node *child; + int ret = 0; + + + led_node = 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 >= MAX597X_NUM_LEDS) { + dev_err(max597x->dev, "invalid LED (%u >= %d)\n", reg, + MAX597X_NUM_LEDS); + continue; + } + + ret = max597x_led(max597x, child, reg); + if (ret < 0) { + of_node_put(child); + return ret; + } + } + + return ret; +} + +static struct platform_driver max597x_led_driver = { + .driver = { + .name = "max597x-led", + }, + .probe = max597x_led_probe, +}; + +module_platform_driver(max597x_led_driver); + + +MODULE_AUTHOR("Patrick Rudolph "); +MODULE_DESCRIPTION("MAX5970_hot-swap controller driver"); +MODULE_LICENSE("GPL v2"); -- 2.35.3