From patchwork Fri Apr 14 05:53:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Kemnade X-Patchwork-Id: 674181 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 0B874C77B78 for ; Fri, 14 Apr 2023 05:53:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229689AbjDNFxz (ORCPT ); Fri, 14 Apr 2023 01:53:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229540AbjDNFxx (ORCPT ); Fri, 14 Apr 2023 01:53:53 -0400 Received: from mail.andi.de1.cc (mail.andi.de1.cc [IPv6:2a01:238:4321:8900:456f:ecd6:43e:202c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E12EF4200; Thu, 13 Apr 2023 22:53:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kemnade.info; s=20220719; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=lA9kpCMxXbRCfAmCAB/+MeQZki/ml2bCRzoTdFMlRYI=; b=uyLpLiM4ZYTToOurnBKzfCUUBZ Rmuf5c19ZEsEJNJLSBGcvwrx8it3MMkFL0BzgoJksqlI1wmT+fEEl1VZd9b7xeOioLKzIgwHZuZXd I6U5OLMcDFTuAKEBp4j4Wk1BUKqCClihZhjW4HP/TXRctuig9SSD5WkpeQkHbJHhYDi0BNfOMtpxD /H3NlquUw3GS7ClkX9KDzMOELliauAfcyhXHbdKsVpxMkUxIQGpQ3xpLK+EzhqhwUSlIMQzpKevV6 8Tm2Sd1yUKYifNhmoLFlbqqOhoDLE2R7glEOSHdufBwBvdSRdsYym+0EewU/pS+1x3nAs/mfpyTpG i/Gb82Fg==; Received: from p200300ccff0c0d001a3da2fffebfd33a.dip0.t-ipconnect.de ([2003:cc:ff0c:d00:1a3d:a2ff:febf:d33a] helo=aktux) by mail.andi.de1.cc with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1pnCNV-0005Mn-SG; Fri, 14 Apr 2023 07:53:46 +0200 Received: from andi by aktux with local (Exim 4.96) (envelope-from ) id 1pnCNV-001PH4-1f; Fri, 14 Apr 2023 07:53:45 +0200 From: Andreas Kemnade To: pavel@ucw.cz, lee@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, andreas@kemnade.info, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Matti Vaittinen Subject: [PATCH v4 2/2] leds: bd2606mvv: Driver for the Rohm 6 Channel i2c LED driver Date: Fri, 14 Apr 2023 07:53:41 +0200 Message-Id: <20230414055341.335456-3-andreas@kemnade.info> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230414055341.335456-1-andreas@kemnade.info> References: <20230414055341.335456-1-andreas@kemnade.info> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The device provides 6 channels which can be individually turned off and on but groups of two channels share a common brightness register. Limitation: The GPIO to enable the device is not used yet. Signed-off-by: Andreas Kemnade Reviewed-by: Matti Vaittinen --- drivers/leds/Kconfig | 11 +++ drivers/leds/Makefile | 1 + drivers/leds/leds-bd2606mvv.c | 143 ++++++++++++++++++++++++++++++++++ 3 files changed, 155 insertions(+) create mode 100644 drivers/leds/leds-bd2606mvv.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 9dbce09eabacf..cc4eadbb2542e 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -551,6 +551,17 @@ config LEDS_REGULATOR help This option enables support for regulator driven LEDs. +config LEDS_BD2606MVV + tristate "LED driver for BD2606MVV" + depends on LEDS_CLASS + depends on I2C + select REGMAP_I2C + help + This option enables support for BD2606MVV LED driver chips + accessed via the I2C bus. It supports setting brightness, with + the limitiation that there are groups of two channels sharing + a brightness setting, but not the on/off setting. + config LEDS_BD2802 tristate "LED driver for BD2802 RGB LED" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index d30395d11fd84..c07d1512c745a 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_LEDS_ARIEL) += leds-ariel.o obj-$(CONFIG_LEDS_AW2013) += leds-aw2013.o obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o +obj-$(CONFIG_LEDS_BD2606MVV) += leds-bd2606mvv.o obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o obj-$(CONFIG_LEDS_BLINKM) += leds-blinkm.o obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o diff --git a/drivers/leds/leds-bd2606mvv.c b/drivers/leds/leds-bd2606mvv.c new file mode 100644 index 0000000000000..81ceeaa434494 --- /dev/null +++ b/drivers/leds/leds-bd2606mvv.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2023 Andreas Kemnade + * + * Datasheet: + * https://fscdn.rohm.com/en/products/databook/datasheet/ic/power/led_driver/bd2606mvv_1-e.pdf + */ + +#include +#include +#include +#include +#include +#include +#include + +#define BD2606_MAX_LEDS 6 +#define BD2606_MAX_BRIGHTNESS 63 +#define BD2606_REG_PWRCNT 3 +#define ldev_to_led(c) container_of(c, struct bd2606mvv_led, ldev) + +struct bd2606mvv_led { + unsigned int led_no; + struct led_classdev ldev; + struct bd2606mvv_priv *priv; +}; + +struct bd2606mvv_priv { + struct bd2606mvv_led leds[BD2606_MAX_LEDS]; + struct regmap *regmap; +}; + +static int +bd2606mvv_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct bd2606mvv_led *led = ldev_to_led(led_cdev); + struct bd2606mvv_priv *priv = led->priv; + int err; + + if (brightness == 0) + return regmap_update_bits(priv->regmap, + BD2606_REG_PWRCNT, + 1 << led->led_no, + 0); + + /* shared brightness register */ + err = regmap_write(priv->regmap, led->led_no / 2, + brightness); + if (err) + return err; + + return regmap_update_bits(priv->regmap, + BD2606_REG_PWRCNT, + 1 << led->led_no, + 1 << led->led_no); +} + +static const struct regmap_config bd2606mvv_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x3, +}; + +static int bd2606mvv_probe(struct i2c_client *client) +{ + struct fwnode_handle *np, *child; + struct device *dev = &client->dev; + struct bd2606mvv_priv *priv; + bool active[BD2606_MAX_LEDS] = { 0 }; + int err, reg; + + np = dev_fwnode(dev); + if (!np) + return -ENODEV; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->regmap = devm_regmap_init_i2c(client, &bd2606mvv_regmap); + if (IS_ERR(priv->regmap)) { + err = PTR_ERR(priv->regmap); + dev_err(dev, "Failed to allocate register map: %d\n", err); + return err; + } + + i2c_set_clientdata(client, priv); + + fwnode_for_each_available_child_node(np, child) { + struct bd2606mvv_led *led; + struct led_init_data init_data = {}; + + init_data.fwnode = child; + + err = fwnode_property_read_u32(child, "reg", ®); + if (err) { + fwnode_handle_put(child); + return err; + } + if (reg < 0 || reg >= BD2606_MAX_LEDS || + active[reg]) { + fwnode_handle_put(child); + return -EINVAL; + } + led = &priv->leds[reg]; + + active[reg] = true; + led->priv = priv; + led->led_no = reg; + led->ldev.brightness_set_blocking = bd2606mvv_brightness_set; + led->ldev.max_brightness = BD2606_MAX_BRIGHTNESS; + err = devm_led_classdev_register_ext(dev, &led->ldev, + &init_data); + if (err < 0) { + fwnode_handle_put(child); + return dev_err_probe(dev, err, + "couldn't register LED %s\n", + led->ldev.name); + } + } + return 0; +} + +static const struct of_device_id __maybe_unused of_bd2606mvv_leds_match[] = { + { .compatible = "rohm,bd2606mvv", }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_bd2606mvv_leds_match); + +static struct i2c_driver bd2606mvv_driver = { + .driver = { + .name = "leds-bd2606mvv", + .of_match_table = of_match_ptr(of_bd2606mvv_leds_match), + }, + .probe_new = bd2606mvv_probe, +}; + +module_i2c_driver(bd2606mvv_driver); + +MODULE_AUTHOR("Andreas Kemnade "); +MODULE_DESCRIPTION("BD2606 LED driver"); +MODULE_LICENSE("GPL");