From patchwork Mon Aug 19 14:39:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiko Stuebner X-Patchwork-Id: 13768466 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6876FC52D6F for ; Mon, 19 Aug 2024 14:42:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/d3goPYm6vGqd+0EyycSa9sK9erYdzHQNT4/10zUL/I=; b=Vw4Zv7nHpz0+NBp8HmgJjGnVwh wnFcz8HOBmbH1JL2ouV1/K3OvDzj7er8j7SGS3G3qImtmqs85cITbdwdR+qUsXJcj7TtL23c2AGkA IhnZXvrhvaH33Ey5jjTyukPSd4dGQXR0N05jzdMgtU2aPbPdO3hfSdurO2Rp+Mst82h6AEsJ/9lAe YjLIVBzpqguxR7siki9T9I8aR5mr6ATI6uQnPigjzv406wrEfmRhzpa68kXplEvYddD9JzY+h03fr K9mInF/tQ7W5jKmXyVg+sH7E12GQ/zPnliPo7Z/oypBpUSeOisuduAiGzNxPt1U/wXM8CgoH+poF3 15taQ5og==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sg3aC-00000001nJi-2Rv7; Mon, 19 Aug 2024 14:42:08 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sg3YL-00000001mfD-3fRj; Mon, 19 Aug 2024 14:40:16 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: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=/d3goPYm6vGqd+0EyycSa9sK9erYdzHQNT4/10zUL/I=; b=bvk23WjPtmOBPCIqopPgixTXyO rPoEEGsKSRgk/mc7pPnWxU+lv9bvgcsTzJII4+VU6fSNifH76nBvkmGfFVDk0ksNb8KBq58Sg/vkw cs5ZUSUenky57Fsq+un48C68J4jZc37Cd1TJo0qrdOdaQh0MDqcZkbRa4dHqjKdEiV4iBl60s2l2y dkqoH5Bi5GVbgnfK5K8L0XTAe+TpRTYjxb+I7DfNqILPGXi/Ss845ZyRQ7iB4JyigZxKjC1RXGgLV AxBXsXp9Sr6N6LEPHUr/xPUfoVQ+o61mH2OsmkumsKDWNIMJM+Cfr0YcifOOl7Cd+UEANqEsz3Dbj iRNq6R3A==; Received: from i53875a9f.versanet.de ([83.135.90.159] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1sg3YD-00014n-Tr; Mon, 19 Aug 2024 16:40:05 +0200 From: Heiko Stuebner To: lee@kernel.org Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, jdelvare@suse.com, linux@roeck-us.net, heiko@sntech.de, dmitry.torokhov@gmail.com, pavel@ucw.cz, ukleinek@debian.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-input@vger.kernel.org, linux-leds@vger.kernel.org Subject: [PATCH v5 3/7] leds: add driver for LEDs from qnap-mcu devices Date: Mon, 19 Aug 2024 16:39:56 +0200 Message-ID: <20240819144000.411846-4-heiko@sntech.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240819144000.411846-1-heiko@sntech.de> References: <20240819144000.411846-1-heiko@sntech.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240819_074014_330599_7A36316C X-CRM114-Status: GOOD ( 30.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This adds a driver that connects to the qnap-mcu mfd driver and provides access to the LEDs on it. Signed-off-by: Heiko Stuebner --- MAINTAINERS | 1 + drivers/leds/Kconfig | 11 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-qnap-mcu.c | 247 +++++++++++++++++++++++++++++++++++ 4 files changed, 260 insertions(+) create mode 100644 drivers/leds/leds-qnap-mcu.c diff --git a/MAINTAINERS b/MAINTAINERS index 0fbd2d953da4..4dff0e237f22 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18657,6 +18657,7 @@ F: drivers/media/tuners/qm1d1c0042* QNAP MCU DRIVER M: Heiko Stuebner S: Maintained +F: drivers/leds/leds-qnap-mcu.c F: drivers/mfd/qnap-mcu.c F: include/linux/qnap-mcu.h diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 8d9d8da376e4..9a337478dd80 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -580,6 +580,17 @@ config LEDS_PCA995X LED driver chips accessed via the I2C bus. Supported devices include PCA9955BTW, PCA9952TW and PCA9955TW. +config LEDS_QNAP_MCU + tristate "LED Support for QNAP MCU controllers" + depends on LEDS_CLASS + depends on MFD_QNAP_MCU + help + This option enables support for LEDs available on embedded + controllers used in QNAP NAS devices. + + This driver can also be built as a module. If so, the module + will be called qnap-mcu-leds. + config LEDS_WM831X_STATUS tristate "LED support for status LEDs on WM831x PMICs" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 18afbb5a23ee..c6f74865d729 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -79,6 +79,7 @@ obj-$(CONFIG_LEDS_PCA995X) += leds-pca995x.o obj-$(CONFIG_LEDS_PM8058) += leds-pm8058.o obj-$(CONFIG_LEDS_POWERNV) += leds-powernv.o obj-$(CONFIG_LEDS_PWM) += leds-pwm.o +obj-$(CONFIG_LEDS_QNAP_MCU) += leds-qnap-mcu.o obj-$(CONFIG_LEDS_REGULATOR) += leds-regulator.o obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o obj-$(CONFIG_LEDS_SUN50I_A100) += leds-sun50i-a100.o diff --git a/drivers/leds/leds-qnap-mcu.c b/drivers/leds/leds-qnap-mcu.c new file mode 100644 index 000000000000..aa5d662f2c7f --- /dev/null +++ b/drivers/leds/leds-qnap-mcu.c @@ -0,0 +1,247 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* + * Driver for LEDs found on QNAP MCU devices + * + * Copyright (C) 2024 Heiko Stuebner + */ + +#include +#include +#include +#include +#include +#include + +enum qnap_mcu_err_led_mode { + QNAP_MCU_ERR_LED_ON = 0, + QNAP_MCU_ERR_LED_OFF = 1, + QNAP_MCU_ERR_LED_BLINK_FAST = 2, + QNAP_MCU_ERR_LED_BLINK_SLOW = 3, +}; + +struct qnap_mcu_err_led { + struct qnap_mcu *mcu; + struct led_classdev cdev; + char name[LED_MAX_NAME_SIZE]; + u8 num; + u8 mode; +}; + +static inline struct qnap_mcu_err_led * + cdev_to_qnap_mcu_err_led(struct led_classdev *led_cdev) +{ + return container_of(led_cdev, struct qnap_mcu_err_led, cdev); +} + +static int qnap_mcu_err_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct qnap_mcu_err_led *err_led = cdev_to_qnap_mcu_err_led(led_cdev); + u8 cmd[] = { + [0] = 0x40, + [1] = 0x52, + [2] = 0x30 + err_led->num, + [3] = 0x30 + }; + + /* + * If the led is off, turn it on. Otherwise don't disturb + * a possible set blink-mode. + */ + if (value == 0) + err_led->mode = QNAP_MCU_ERR_LED_OFF; + else if (err_led->mode == QNAP_MCU_ERR_LED_OFF) + err_led->mode = QNAP_MCU_ERR_LED_ON; + + cmd[3] = 0x30 + err_led->mode; + + return qnap_mcu_exec_with_ack(err_led->mcu, cmd, sizeof(cmd)); +} + +static int qnap_mcu_err_led_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + struct qnap_mcu_err_led *err_led = cdev_to_qnap_mcu_err_led(led_cdev); + u8 cmd[] = { + [0] = 0x40, + [1] = 0x52, + [2] = 0x30 + err_led->num, + [3] = 0x30 + }; + + /* LED is off, nothing to do */ + if (err_led->mode == QNAP_MCU_ERR_LED_OFF) + return 0; + + if (*delay_on < 500) { + *delay_on = 100; + *delay_off = 100; + err_led->mode = QNAP_MCU_ERR_LED_BLINK_FAST; + } else { + *delay_on = 500; + *delay_off = 500; + err_led->mode = QNAP_MCU_ERR_LED_BLINK_SLOW; + } + + cmd[3] = 0x30 + err_led->mode; + + return qnap_mcu_exec_with_ack(err_led->mcu, cmd, sizeof(cmd)); +} + +static int qnap_mcu_register_err_led(struct device *dev, struct qnap_mcu *mcu, int num) +{ + struct qnap_mcu_err_led *err_led; + int ret; + + err_led = devm_kzalloc(dev, sizeof(*err_led), GFP_KERNEL); + if (!err_led) + return -ENOMEM; + + err_led->mcu = mcu; + err_led->num = num; + err_led->mode = QNAP_MCU_ERR_LED_OFF; + + snprintf(err_led->name, LED_MAX_NAME_SIZE, "hdd%d:red:status", num + 1); + err_led->cdev.name = err_led->name; + + err_led->cdev.brightness_set_blocking = qnap_mcu_err_led_set; + err_led->cdev.blink_set = qnap_mcu_err_led_blink_set; + err_led->cdev.brightness = 0; + err_led->cdev.max_brightness = 1; + + ret = devm_led_classdev_register(dev, &err_led->cdev); + if (ret) + return dev_err_probe(dev, ret, "failed to register hdd led %d", num); + + return qnap_mcu_err_led_set(&err_led->cdev, 0); +} + +enum qnap_mcu_usb_led_mode { + QNAP_MCU_USB_LED_ON = 1, + QNAP_MCU_USB_LED_OFF = 3, + QNAP_MCU_USB_LED_BLINK = 2, +}; + +struct qnap_mcu_usb_led { + struct qnap_mcu *mcu; + struct led_classdev cdev; + u8 mode; +}; + +static inline struct qnap_mcu_usb_led * + cdev_to_qnap_mcu_usb_led(struct led_classdev *led_cdev) +{ + return container_of(led_cdev, struct qnap_mcu_usb_led, cdev); +} + +static int qnap_mcu_usb_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct qnap_mcu_usb_led *usb_led = cdev_to_qnap_mcu_usb_led(led_cdev); + u8 cmd[] = { + [0] = 0x40, + [1] = 0x43, + [2] = 0 + }; + + /* + * If the led is off, turn it on. Otherwise don't disturb + * a possible set blink-mode. + */ + if (value == 0) + usb_led->mode = QNAP_MCU_USB_LED_OFF; + else if (usb_led->mode == QNAP_MCU_USB_LED_OFF) + usb_led->mode = QNAP_MCU_USB_LED_ON; + + /* byte 3 is shared between the usb led target and setting the mode */ + cmd[2] = 0x44 | usb_led->mode; + + return qnap_mcu_exec_with_ack(usb_led->mcu, cmd, sizeof(cmd)); +} + +static int qnap_mcu_usb_led_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + struct qnap_mcu_usb_led *usb_led = cdev_to_qnap_mcu_usb_led(led_cdev); + u8 cmd[] = { + [0] = 0x40, + [1] = 0x43, + [2] = 0 + }; + + /* LED is off, nothing to do */ + if (usb_led->mode == QNAP_MCU_USB_LED_OFF) + return 0; + + *delay_on = 250; + *delay_off = 250; + usb_led->mode = QNAP_MCU_USB_LED_BLINK; + + /* byte 3 is shared between the usb led target and setting the mode */ + cmd[2] = 0x44 | usb_led->mode; + + return qnap_mcu_exec_with_ack(usb_led->mcu, cmd, sizeof(cmd)); +} + +static int qnap_mcu_register_usb_led(struct device *dev, struct qnap_mcu *mcu) +{ + struct qnap_mcu_usb_led *usb_led; + int ret; + + usb_led = devm_kzalloc(dev, sizeof(*usb_led), GFP_KERNEL); + if (!usb_led) + return -ENOMEM; + + usb_led->mcu = mcu; + usb_led->mode = QNAP_MCU_USB_LED_OFF; + usb_led->cdev.name = "usb:blue:disk"; + usb_led->cdev.brightness_set_blocking = qnap_mcu_usb_led_set; + usb_led->cdev.blink_set = qnap_mcu_usb_led_blink_set; + usb_led->cdev.brightness = 0; + usb_led->cdev.max_brightness = 1; + + ret = devm_led_classdev_register(dev, &usb_led->cdev); + if (ret) + return dev_err_probe(dev, ret, "failed to register usb led"); + + return qnap_mcu_usb_led_set(&usb_led->cdev, 0); +} + +static int qnap_mcu_leds_probe(struct platform_device *pdev) +{ + struct qnap_mcu *mcu = dev_get_drvdata(pdev->dev.parent); + const struct qnap_mcu_variant *variant = qnap_mcu_get_variant_data(mcu); + int ret, i; + + for (i = 0; i < variant->num_drives; i++) { + ret = qnap_mcu_register_err_led(&pdev->dev, mcu, i); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "failed to register error led %d\n", i); + } + + if (variant->usb_led) { + ret = qnap_mcu_register_usb_led(&pdev->dev, mcu); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "failed to register usb led %d\n", i); + } + + return 0; +} + +static struct platform_driver qnap_mcu_leds_driver = { + .probe = qnap_mcu_leds_probe, + .driver = { + .name = "qnap-mcu-leds", + }, +}; +module_platform_driver(qnap_mcu_leds_driver); + +MODULE_ALIAS("platform:qnap-mcu-leds"); +MODULE_AUTHOR("Heiko Stuebner "); +MODULE_DESCRIPTION("QNAP MCU LEDs driver"); +MODULE_LICENSE("GPL");