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Date: Thu, 27 Jul 2023 18:05:23 +0200 Message-Id: <20230727160525.23312-2-matuszpd@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230727160525.23312-1-matuszpd@gmail.com> References: <20230727160525.23312-1-matuszpd@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Website: http://www.broadchip.com Signed-off-by: Matus Gajdos --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml index af60bf1a6664..dc1ed3dc0c9f 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -202,6 +202,8 @@ patternProperties: description: Bosch Sensortec GmbH "^boundary,.*": description: Boundary Devices Inc. + "^broadchip,.*": + description: Broadchip Technology Group Co., Ltd. "^brcm,.*": description: Broadcom Corporation "^broadmobi,.*": From patchwork Thu Jul 27 16:05:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matus Gajdos X-Patchwork-Id: 708175 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 7D25AC001E0 for ; Thu, 27 Jul 2023 16:06:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233800AbjG0QGd (ORCPT ); Thu, 27 Jul 2023 12:06:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233476AbjG0QGa (ORCPT ); Thu, 27 Jul 2023 12:06:30 -0400 Received: from mail-lj1-x231.google.com (mail-lj1-x231.google.com [IPv6:2a00:1450:4864:20::231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 386ED2D45; Thu, 27 Jul 2023 09:06:29 -0700 (PDT) Received: by mail-lj1-x231.google.com with SMTP id 38308e7fff4ca-2b6f97c7115so18204001fa.2; Thu, 27 Jul 2023 09:06:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690473987; x=1691078787; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=yyKDf+CToOe8rKKKOXBY/UzZ8faPu6UhccJmfEJhILw=; b=jIyUhVoZRSdJJO/RKPbHwkRqRp4QkuP6L9jVwzEGc0cB09SWgMpcVxbkFdpdT7PcRW H6MI1od9iKQGz5ZqKK2W6t4fx6bTd/iy2u4v7JoxrfPm/hEpbFeeTUW6LKjdwmln4xFe i/zZ4lJSntCA/TrmAld3pui6ydKofYTPe30ttK+ganP0mfLtUl774clTvRiQ9htw1k7m vdL0KBvZDEZG6w1yYtnv39TG9ySbWme9LalA+v0nESfa81T3kfpxBFENLG0mNAfpqDjC JX1qal+A55JANOWitOZUgUH2/YzeV5+A27SgZUPU7e4/cEnTETiXxu69TQXqEU4Ex9y/ ppPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690473987; x=1691078787; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=yyKDf+CToOe8rKKKOXBY/UzZ8faPu6UhccJmfEJhILw=; b=U+hecDcCDdc4xj/lRlldRj+vyR2A5XI2sMtnVQpg/0QlBtJ6Xxx0YPhrWkEfaN/fi1 G6VuN18ObMZB+B1APktmewp//bbTk3U8zV6xJoWZTsfDAnG11Oj+mUJXlBnwUfn90ium sPXsrbkR5WrgJ088HLEsXztHpCfa9ZecsHRhhUzrlkmGiuiKYhflyxCteKoYGfOjUN/W Qk0D+yR1PvthsBNvQv2ve4LGZgfWkgpFIEUsy805PIYCxCS7s4kmIkoOLs8FW1mrIMv2 mR9CDGuAVuQNTU/emYeaTdBgoNydqzMAWGvvhFa1XgXgydQ0y6IeZqPeH6T8UIBqiO+J ZMXQ== X-Gm-Message-State: ABy/qLbb/F+NInTVhcm/4yR68wQ0D0YfNiVRX7NXxqdjHlE81SUXB9VB KNSrw1NrK6mltS92lXwEP2keAH4lr00s2Q== X-Google-Smtp-Source: APBJJlEQkdEBVvchG2qcztsQVkpCpSxQ4/441HR6s3d4gLwnmjmyRnb57s1Aq2wLH/YGWoOFxT8a7Q== X-Received: by 2002:a2e:9550:0:b0:2b6:e2aa:8fc2 with SMTP id t16-20020a2e9550000000b002b6e2aa8fc2mr2014600ljh.46.1690473987112; Thu, 27 Jul 2023 09:06:27 -0700 (PDT) Received: from localhost.localdomain ([2a01:c844:242b:b300:215:5dff:fe78:868]) by smtp.gmail.com with ESMTPSA id ck8-20020a170906c44800b00982be08a9besm936540ejb.172.2023.07.27.09.06.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jul 2023 09:06:26 -0700 (PDT) From: Matus Gajdos To: Pavel Machek , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Matus Gajdos Subject: [PATCH 2/3] dt-bindings: leds: Add binding for Broadchip BCT3024 LED driver Date: Thu, 27 Jul 2023 18:05:24 +0200 Message-Id: <20230727160525.23312-3-matuszpd@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230727160525.23312-1-matuszpd@gmail.com> References: <20230727160525.23312-1-matuszpd@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org The BCT3024 chip is an I2C LED driver with independent 24 output channels. Each channel supports 256 levels. Signed-off-by: Matus Gajdos --- .../bindings/leds/broadchip,bct3024.yaml | 89 +++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/broadchip,bct3024.yaml diff --git a/Documentation/devicetree/bindings/leds/broadchip,bct3024.yaml b/Documentation/devicetree/bindings/leds/broadchip,bct3024.yaml new file mode 100644 index 000000000000..0d622894e79c --- /dev/null +++ b/Documentation/devicetree/bindings/leds/broadchip,bct3024.yaml @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/broadchip,bct3024.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadchip BCT3024 LED Driver + +maintainers: + - Matus Gajdos + +description: | + The BCT3024 is an I2C LED driver with independent 24 output channels. Each + channel supports 256 levels and its output current can be scaled by a factor + of 1, 1/2, 1/3 and 1/4. + +properties: + compatible: + const: broadchip,bct3024 + + reg: + description: I2C slave address of the driver. + maxItems: 1 + + vdd-supply: + description: Regulator providing power to the VDD pin. + + shutdown-gpios: + maxItems: 1 + description: GPIO attached to the SDB pin. + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^led@[0-9a-f]+$": + type: object + $ref: common.yaml# + unevaluatedProperties: false + + properties: + reg: + description: Index of the LED channel. + minimum: 0 + maximum: 23 + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + +additionalProperties: false + +examples: + - | + #include + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@3c { + compatible = "broadchip,bct3024"; + reg = <0x3c>; + #address-cells = <1>; + #size-cells = <0>; + + vdd-supply = <®_3v3d>; + + led@0 { + reg = <0x00>; + function = LED_FUNCTION_INDICATOR; + color = ; + }; + + led@1 { + reg = <0x01>; + function = LED_FUNCTION_INDICATOR; + color = ; + }; + }; + }; + +... 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Each channel supports 256 levels. Signed-off-by: Matus Gajdos --- drivers/leds/Kconfig | 9 + drivers/leds/Makefile | 1 + drivers/leds/leds-bct3024.c | 564 ++++++++++++++++++++++++++++++++++++ 3 files changed, 574 insertions(+) create mode 100644 drivers/leds/leds-bct3024.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 6046dfeca16f..75059db201e2 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -135,6 +135,15 @@ config LEDS_BCM6358 This option enables support for LEDs connected to the BCM6358 LED HW controller accessed via MMIO registers. +config LEDS_BCT3024 + tristate "LED Support for Broadchip BCT3024" + depends on LEDS_CLASS + depends on I2C + depends on OF + help + This option enables support for LEDs connected to the BCT3024 + LED driver. + config LEDS_CHT_WCOVE tristate "LED support for Intel Cherry Trail Whiskey Cove PMIC" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index d71f1226540c..f9eaed4c2317 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_LEDS_AW200XX) += leds-aw200xx.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_BCT3024) += leds-bct3024.o obj-$(CONFIG_LEDS_BD2606MVV) += leds-bd2606mvv.o obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o obj-$(CONFIG_LEDS_BLINKM) += leds-blinkm.o diff --git a/drivers/leds/leds-bct3024.c b/drivers/leds/leds-bct3024.c new file mode 100644 index 000000000000..7732fe022093 --- /dev/null +++ b/drivers/leds/leds-bct3024.c @@ -0,0 +1,564 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * LED driver for Broadchip BCT3024, based on leds-syscon.c + * + * Copyright 2023 Matus Gajdos + */ + +#include +#include +#include +#include +#include +#include + +#define BCT3024_LED_COUNT 36 +#define BCT3024_REG_SHUTDOWN (0x00) +#define BCT3024_REG_BRIGHTNESS(n) (0x01 + (n)) +#define BCT3024_REG_UPDATE (0x25) +#define BCT3024_REG_CONTROL(n) (0x26 + (n)) +#define BCT3024_REG_GLOBAL_CONTROL (0x4a) +#define BCT3024_REG_RESET (0x4f) + +enum bct3024_state { + BCT3024_STATE_INIT, + BCT3024_STATE_SHUTDOWN, + BCT3024_STATE_IDLE, + BCT3024_STATE_ACTIVE, +}; + +struct bct3024_led { + struct bct3024_led *next; + bool active; + unsigned int idx; + struct led_classdev ldev; + struct bct3024_data *priv; +}; + +struct bct3024_data { + enum bct3024_state state; + struct device *dev; + struct gpio_desc *shutdown_gpiod; + struct regulator *supply; + struct regmap *regmap; + struct mutex lock; + struct bct3024_led leds[BCT3024_LED_COUNT]; +}; + +static const struct reg_default bct3024_defaults[] = { + { BCT3024_REG_SHUTDOWN, 0x00 }, + { BCT3024_REG_BRIGHTNESS(0), 0x00 }, + { BCT3024_REG_BRIGHTNESS(1), 0x00 }, + { BCT3024_REG_BRIGHTNESS(2), 0x00 }, + { BCT3024_REG_BRIGHTNESS(3), 0x00 }, + { BCT3024_REG_BRIGHTNESS(4), 0x00 }, + { BCT3024_REG_BRIGHTNESS(5), 0x00 }, + { BCT3024_REG_BRIGHTNESS(6), 0x00 }, + { BCT3024_REG_BRIGHTNESS(7), 0x00 }, + { BCT3024_REG_BRIGHTNESS(8), 0x00 }, + { BCT3024_REG_BRIGHTNESS(9), 0x00 }, + { BCT3024_REG_BRIGHTNESS(10), 0x00 }, + { BCT3024_REG_BRIGHTNESS(11), 0x00 }, + { BCT3024_REG_BRIGHTNESS(12), 0x00 }, + { BCT3024_REG_BRIGHTNESS(13), 0x00 }, + { BCT3024_REG_BRIGHTNESS(14), 0x00 }, + { BCT3024_REG_BRIGHTNESS(15), 0x00 }, + { BCT3024_REG_BRIGHTNESS(16), 0x00 }, + { BCT3024_REG_BRIGHTNESS(17), 0x00 }, + { BCT3024_REG_BRIGHTNESS(18), 0x00 }, + { BCT3024_REG_BRIGHTNESS(19), 0x00 }, + { BCT3024_REG_BRIGHTNESS(20), 0x00 }, + { BCT3024_REG_BRIGHTNESS(21), 0x00 }, + { BCT3024_REG_BRIGHTNESS(22), 0x00 }, + { BCT3024_REG_BRIGHTNESS(23), 0x00 }, + { BCT3024_REG_BRIGHTNESS(24), 0x00 }, + { BCT3024_REG_BRIGHTNESS(25), 0x00 }, + { BCT3024_REG_BRIGHTNESS(26), 0x00 }, + { BCT3024_REG_BRIGHTNESS(27), 0x00 }, + { BCT3024_REG_BRIGHTNESS(28), 0x00 }, + { BCT3024_REG_BRIGHTNESS(29), 0x00 }, + { BCT3024_REG_BRIGHTNESS(30), 0x00 }, + { BCT3024_REG_BRIGHTNESS(31), 0x00 }, + { BCT3024_REG_BRIGHTNESS(32), 0x00 }, + { BCT3024_REG_BRIGHTNESS(33), 0x00 }, + { BCT3024_REG_BRIGHTNESS(34), 0x00 }, + { BCT3024_REG_BRIGHTNESS(35), 0x00 }, + { BCT3024_REG_UPDATE, 0x00 }, + { BCT3024_REG_CONTROL(0), 0x00 }, + { BCT3024_REG_CONTROL(1), 0x00 }, + { BCT3024_REG_CONTROL(2), 0x00 }, + { BCT3024_REG_CONTROL(3), 0x00 }, + { BCT3024_REG_CONTROL(4), 0x00 }, + { BCT3024_REG_CONTROL(5), 0x00 }, + { BCT3024_REG_CONTROL(6), 0x00 }, + { BCT3024_REG_CONTROL(7), 0x00 }, + { BCT3024_REG_CONTROL(8), 0x00 }, + { BCT3024_REG_CONTROL(9), 0x00 }, + { BCT3024_REG_CONTROL(10), 0x00 }, + { BCT3024_REG_CONTROL(11), 0x00 }, + { BCT3024_REG_CONTROL(12), 0x00 }, + { BCT3024_REG_CONTROL(13), 0x00 }, + { BCT3024_REG_CONTROL(14), 0x00 }, + { BCT3024_REG_CONTROL(15), 0x00 }, + { BCT3024_REG_CONTROL(16), 0x00 }, + { BCT3024_REG_CONTROL(17), 0x00 }, + { BCT3024_REG_CONTROL(18), 0x00 }, + { BCT3024_REG_CONTROL(19), 0x00 }, + { BCT3024_REG_CONTROL(20), 0x00 }, + { BCT3024_REG_CONTROL(21), 0x00 }, + { BCT3024_REG_CONTROL(22), 0x00 }, + { BCT3024_REG_CONTROL(23), 0x00 }, + { BCT3024_REG_CONTROL(24), 0x00 }, + { BCT3024_REG_CONTROL(25), 0x00 }, + { BCT3024_REG_CONTROL(26), 0x00 }, + { BCT3024_REG_CONTROL(27), 0x00 }, + { BCT3024_REG_CONTROL(28), 0x00 }, + { BCT3024_REG_CONTROL(29), 0x00 }, + { BCT3024_REG_CONTROL(30), 0x00 }, + { BCT3024_REG_CONTROL(31), 0x00 }, + { BCT3024_REG_CONTROL(32), 0x00 }, + { BCT3024_REG_CONTROL(33), 0x00 }, + { BCT3024_REG_CONTROL(34), 0x00 }, + { BCT3024_REG_CONTROL(35), 0x00 }, + { BCT3024_REG_GLOBAL_CONTROL, 0x00 }, + { BCT3024_REG_RESET, 0x00 }, +}; + +static bool bct3024_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case BCT3024_REG_UPDATE: + case BCT3024_REG_RESET: + return true; + default: + return false; + } +} + +static bool bct3024_readable_reg(struct device *dev, unsigned int reg) +{ + /* The chip doesn't support i2c read */ + return false; +} + +static bool bct3024_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case BCT3024_REG_SHUTDOWN: + case BCT3024_REG_BRIGHTNESS(0) ... BCT3024_REG_BRIGHTNESS(35): + case BCT3024_REG_UPDATE: + case BCT3024_REG_CONTROL(0) ... BCT3024_REG_CONTROL(35): + case BCT3024_REG_GLOBAL_CONTROL: + case BCT3024_REG_RESET: + return true; + default: + return false; + } +} + +static const struct regmap_config bct3024_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = BCT3024_REG_RESET, + .reg_defaults = bct3024_defaults, + .num_reg_defaults = ARRAY_SIZE(bct3024_defaults), + .volatile_reg = bct3024_volatile_reg, + .readable_reg = bct3024_readable_reg, + .writeable_reg = bct3024_writeable_reg, + .cache_type = REGCACHE_FLAT, +}; + +static int bct3024_write(struct bct3024_data *priv, unsigned int reg, + unsigned int val) +{ + int ret = regmap_write(priv->regmap, reg, val); + + if (ret < 0) + dev_err(priv->dev, "failed to write register 0x%x: %d\n", reg, ret); + + return ret; +} + +static bool bct3024_any_active(struct bct3024_data *priv) +{ + int i; + + for (i = ARRAY_SIZE(priv->leds); i--; ) + if (priv->leds[i].active && priv->leds[i].ldev.brightness) + return true; + + return false; +} + +static int bct3024_set_shutdown_reg(struct bct3024_data *priv, bool shutdown) +{ + unsigned int val = shutdown || !bct3024_any_active(priv) ? 0 : 1; + int ret = bct3024_write(priv, BCT3024_REG_SHUTDOWN, val); + + return ret < 0 ? ret : val; +} + +static int bct3024_shutdown(struct bct3024_data *priv, int active) +{ + struct device *dev = priv->dev; + int is_off = priv->state == BCT3024_STATE_INIT || + priv->state == BCT3024_STATE_SHUTDOWN; + int ret; + + if (is_off == active) { + /* Nothing to do here */ + } else if (active) { + priv->state = BCT3024_STATE_SHUTDOWN; + + bct3024_set_shutdown_reg(priv, true); + regcache_cache_only(priv->regmap, true); + + if (priv->shutdown_gpiod) + gpiod_set_value_cansleep(priv->shutdown_gpiod, 1); + + if (priv->supply) { + ret = regulator_disable(priv->supply); + if (ret < 0) + dev_err(dev, "failed to disable supply: %d\n", ret); + } + } else { + if (priv->supply) { + ret = regulator_enable(priv->supply); + if (ret < 0) { + dev_err(dev, "failed to enable supply: %d\n", ret); + return ret; + } + } + + if (priv->shutdown_gpiod) + gpiod_set_value_cansleep(priv->shutdown_gpiod, 0); + + if (priv->state == BCT3024_STATE_SHUTDOWN) { + regcache_cache_only(priv->regmap, false); + regcache_mark_dirty(priv->regmap); + ret = regcache_sync(priv->regmap); + if (ret < 0) { + dev_err(dev, "failed to sync regmap: %d\n", ret); + return ret; + } + } + + ret = bct3024_set_shutdown_reg(priv, false); + if (ret < 0) + return ret; + + priv->state = ret ? BCT3024_STATE_ACTIVE : BCT3024_STATE_IDLE; + } + + return 0; +} + +static int bct3024_brightness_set(struct led_classdev *ldev, + enum led_brightness brightness) +{ + struct bct3024_led *led = container_of(ldev, struct bct3024_led, ldev); + struct bct3024_data *priv = led->priv; + struct device *dev = priv->dev; + int ret; + unsigned int ctrl, bright; + + if (priv->state == BCT3024_STATE_INIT) + return -EIO; + + if (brightness == 0) { + ctrl = 0x00; + bright = 0; + } else if (brightness < 256) { + ctrl = 0x01; + bright = brightness; + } + + mutex_lock(&priv->lock); + + if (bct3024_any_active(priv) && (priv->state == BCT3024_STATE_IDLE || + priv->state == BCT3024_STATE_SHUTDOWN)) { + pm_runtime_get_sync(dev); + priv->state = BCT3024_STATE_ACTIVE; + } + + for (; led; led = led->next) { + ret = bct3024_write(priv, BCT3024_REG_CONTROL(led->idx), ctrl); + if (ret < 0) + goto exit; + ret = bct3024_write(priv, BCT3024_REG_BRIGHTNESS(led->idx), bright); + if (ret < 0) + goto exit; + } + + ret = bct3024_write(priv, BCT3024_REG_UPDATE, 0); + if (ret < 0) + goto exit; + + ret = bct3024_set_shutdown_reg(priv, false); + if (ret < 0) + goto exit; + + if (!ret && priv->state == BCT3024_STATE_ACTIVE) { + priv->state = BCT3024_STATE_IDLE; + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + /* Activate autosuspend */ + pm_runtime_idle(dev); + } + + ret = 0; + +exit: + mutex_unlock(&priv->lock); + + return ret; +} + +static int bct3024_setup_led(struct bct3024_data *priv, u32 reg, + struct bct3024_led **prev, struct led_init_data *idata) +{ + struct device *dev = priv->dev; + struct bct3024_led *led; + int ret; + + if (reg >= BCT3024_LED_COUNT) { + ret = -EINVAL; + dev_err_probe(dev, ret, "invalid reg value: %u\n", reg); + return ret; + } + + led = &priv->leds[reg]; + + if (led->active) { + ret = -EINVAL; + dev_err_probe(dev, ret, "reg redeclared: %u\n", reg); + return ret; + } + + led->active = true; + led->priv = priv; + led->idx = reg; + + if (!*prev) { + led->ldev.max_brightness = 255; + led->ldev.brightness_set_blocking = bct3024_brightness_set; + + ret = devm_led_classdev_register_ext(dev, &led->ldev, idata); + if (ret < 0) { + dev_err_probe(dev, ret, "failed to register led %u\n", reg); + return ret; + } + } else + (*prev)->next = led; + + *prev = led; + + return 0; +} + +static int bct3024_of_parse(struct i2c_client *client) +{ + struct bct3024_data *priv = i2c_get_clientdata(client); + struct device *dev = priv->dev; + struct device_node *np; + int ret; + + ret = of_get_child_count(dev->of_node); + if (!ret || ret > ARRAY_SIZE(priv->leds)) { + dev_err_probe(dev, -EINVAL, "invalid nodes count: %d\n", ret); + return -EINVAL; + } + + for_each_child_of_node(dev->of_node, np) { + u32 regs[BCT3024_LED_COUNT]; + struct led_init_data idata = { + .fwnode = of_fwnode_handle(np), + .devicename = client->name, + }; + struct bct3024_led *led; + int count, i; + + count = of_property_read_variable_u32_array(np, "reg", regs, 1, + BCT3024_LED_COUNT); + if (count < 0) { + ret = count; + dev_err_probe(dev, ret, "failed to read node reg\n"); + goto fail; + } + + for (i = 0, led = NULL; i < count; i++) { + ret = bct3024_setup_led(priv, regs[i], &led, &idata); + if (ret < 0) + goto fail; + } + } + + return 0; + +fail: + of_node_put(np); + + return ret; +} + +static int bct3024_i2c_probe(struct i2c_client *client) +{ + struct bct3024_data *priv; + struct device *dev = &client->dev; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + + priv->supply = devm_regulator_get_optional(dev, "vdd"); + if (IS_ERR(priv->supply)) { + ret = PTR_ERR(priv->supply); + if (ret != -ENODEV) { + dev_err_probe(dev, ret, "failed to get supply\n"); + return ret; + } + priv->supply = NULL; + } + + priv->shutdown_gpiod = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH); + if (IS_ERR(priv->shutdown_gpiod)) { + ret = PTR_ERR(priv->shutdown_gpiod); + dev_err_probe(dev, ret, "failed to get shutdown gpio\n"); + return ret; + } + + priv->regmap = devm_regmap_init_i2c(client, &bct3024_regmap); + if (IS_ERR(priv->regmap)) { + ret = PTR_ERR(priv->regmap); + return ret; + } + + mutex_init(&priv->lock); + i2c_set_clientdata(client, priv); + + pm_runtime_set_autosuspend_delay(dev, 2000); + pm_runtime_use_autosuspend(dev); + pm_runtime_enable(dev); + if (!pm_runtime_enabled(dev)) { + ret = bct3024_shutdown(priv, false); + if (ret < 0) + return ret; + } + + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) + goto fail; + + ret = bct3024_of_parse(client); + if (ret < 0) + goto fail; + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return 0; + +fail: + dev_err_probe(dev, ret, "probe failed\n"); + if (!pm_runtime_status_suspended(dev)) + bct3024_shutdown(priv, 2); + return ret; +} + +static void bct3024_i2c_remove(struct i2c_client *client) +{ + struct bct3024_data *priv = i2c_get_clientdata(client); + + bct3024_shutdown(priv, true); + pm_runtime_disable(priv->dev); + mutex_destroy(&priv->lock); +} + +static void bct3024_i2c_shutdown(struct i2c_client *client) +{ + struct bct3024_data *priv = i2c_get_clientdata(client); + + bct3024_shutdown(priv, true); +} + +#ifdef CONFIG_PM_SLEEP +static int bct3024_runtime_idle(struct device *dev) +{ + struct bct3024_data *priv = dev_get_drvdata(dev); + + dev_dbg(dev, "%s: %d\n", __func__, priv->state); + + return priv->state == BCT3024_STATE_ACTIVE ? -EBUSY : 0; +} + +static int bct3024_runtime_suspend(struct device *dev) +{ + struct bct3024_data *priv = dev_get_drvdata(dev); + + dev_dbg(dev, "%s: %d\n", __func__, priv->state); + + switch (priv->state) { + case BCT3024_STATE_INIT: + case BCT3024_STATE_SHUTDOWN: + return 0; + default: + break; + } + + return bct3024_shutdown(priv, true); +} + +static int bct3024_runtime_resume(struct device *dev) +{ + struct bct3024_data *priv = dev_get_drvdata(dev); + int ret; + + dev_dbg(dev, "%s: %d\n", __func__, priv->state); + + switch (priv->state) { + case BCT3024_STATE_INIT: + case BCT3024_STATE_SHUTDOWN: + break; + default: + return 0; + } + + ret = bct3024_shutdown(priv, false); + if (ret < 0) + bct3024_shutdown(priv, 2); + + return ret; +} +#endif + +static const struct dev_pm_ops bct3024_pm_ops = { + SET_RUNTIME_PM_OPS(bct3024_runtime_suspend, bct3024_runtime_resume, + bct3024_runtime_idle) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) +}; + +static const struct of_device_id bct3024_of_match[] = { + { .compatible = "broadchip,bct3024" }, + { } +}; +MODULE_DEVICE_TABLE(of, bct3024_of_match); + +static struct i2c_driver bct3024_driver = { + .driver = { + .name = "bct3024", + .of_match_table = bct3024_of_match, + .pm = &bct3024_pm_ops, + }, + .probe_new = bct3024_i2c_probe, + .shutdown = bct3024_i2c_shutdown, + .remove = bct3024_i2c_remove, +}; + +module_i2c_driver(bct3024_driver); + +MODULE_AUTHOR("Matus Gajdos "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Broadchip BCT3024 LED driver");