From patchwork Tue Mar 18 16:26:25 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Dubois-Briand X-Patchwork-Id: 14021306 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A0D5212B3A; Tue, 18 Mar 2025 16:26:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.198 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742315220; cv=none; b=r/HiW6rZiLiHz8z2S8yhdzywfNjNWETpXJGTpUlI+zmPMI5CIqOtZSfxsRxC+htr7G3Wz7Hn8cUqV40OcZOug3EKuKdBDAsdlVQw9lTUiNRUMTrZbwqV+do2sZkbHf+5sAYENlAqOC3WIBuW3SnoA8s5IdYphCRdrWSQiQUn630= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742315220; c=relaxed/simple; bh=hrUQt9P6MlDrl5X1gQll4pFJ0lKxjCaTE0UbBmYk/yY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=X7qsDi256sib+9tqbqcqHW6R8NU1sk/fSIYnklFQJp7RNpEiNSRegz9HYxQeFweWV9oF/J3DfOjIbFTMrxVwmPuITnY0zfglk8WozeGglv64HwXGyxmZCHs14D6LMywOLZWN5wMpW36Aa20JUTOK/9cjCSstc26tmaCq6eC4Oj4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=FFYNJwrK; arc=none smtp.client-ip=217.70.183.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="FFYNJwrK" Received: by mail.gandi.net (Postfix) with ESMTPSA id 9CB94442B1; Tue, 18 Mar 2025 16:26:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1742315215; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YiTYiy65zakLWOEGkN2kYpRq71egvJxsAE8Ap+kg44o=; b=FFYNJwrKlqi9bRQQLx8+0jEjpfafmtpEEI1mPoJ5TLG7KoSKAqidtowh76/1RHm6Cj8GaG AvLXSMtn8koZydBG8CRTsQBCQwdej+vTTv0Pd966P3TtokUoab6x/6IfMe2u81bT5nELBm rwaSBwegwgF8ncPTdDUHdjO9SQh+ChEbi1MEmdTEmak8K+z7Tp3dMO/y9Kearzf0W7YRV6 mofFwijBvAbrB15TftLf+Rb4VzkQaMVjO9oaIweIm0ORHueTDeUcYporoS7t08IqcnXSVH kUCreX3lmC9yewq2U01tkqD6eV7k9pJB7S1ieDkyZrejSrdNxr6wq58a47Mt7w== From: Mathieu Dubois-Briand Date: Tue, 18 Mar 2025 17:26:25 +0100 Subject: [PATCH v5 09/11] input: keyboard: Add support for MAX7360 keypad Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250318-mdb-max7360-support-v5-9-fb20baf97da0@bootlin.com> References: <20250318-mdb-max7360-support-v5-0-fb20baf97da0@bootlin.com> In-Reply-To: <20250318-mdb-max7360-support-v5-0-fb20baf97da0@bootlin.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kamel Bouhara , Linus Walleij , Bartosz Golaszewski , Dmitry Torokhov , =?utf-8?q?Uwe_Kleine-K=C3=B6n?= =?utf-8?q?ig?= , Michael Walle , Mark Brown , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-pwm@vger.kernel.org, andriy.shevchenko@intel.com, =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Mathieu Dubois-Briand X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1742315204; l=10088; i=mathieu.dubois-briand@bootlin.com; s=20241219; h=from:subject:message-id; bh=hrUQt9P6MlDrl5X1gQll4pFJ0lKxjCaTE0UbBmYk/yY=; b=Sm4cnfnBbVd1Nf3/qv01pTWCY/HUkjnb3jScYO2GrL4rIYCufEG5pyp9rzyW3KtAx7DeZ1rSG JNptE+IFhvlDj/0oeO5DLYwI/QS8XrqrcDlZ6DmjLRvIBwkYkgYy7G5 X-Developer-Key: i=mathieu.dubois-briand@bootlin.com; a=ed25519; pk=1PVTmzPXfKvDwcPUzG0aqdGoKZJA3b9s+3DqRlm0Lww= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddugedvledvucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomhepofgrthhhihgvuhcuffhusghoihhsqdeurhhirghnugcuoehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpedthfegtedvvdehjeeiheehheeuteejleektdefheehgfefgeelhfetgedttdfhteenucfkphepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeinecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehinhgvthepvdgrtddumegtsgdugeemheehieemjegrtddtmeeffhgtfhemfhgstdgumeduvdeivdemvdgvjeeipdhhvghloheplgduvdejrddtrddurddungdpmhgrihhlfhhrohhmpehmrghthhhivghurdguuhgsohhishdqsghrihgrnhgusegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopedvfedprhgtphhtthhopehlihhnuhigqdhinhhpuhhtsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepuggrkhhrsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehrrghfrggvlhesk hgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhgrthhhihgvuhdrughusghoihhsqdgsrhhirghnugessghoohhtlhhinhdrtghomhdprhgtphhtthhopehukhhlvghinhgvkheskhgvrhhnvghlrdhorhhgpdhrtghpthhtohepkhgrmhgvlhdrsghouhhhrghrrgessghoohhtlhhinhdrtghomhdprhgtphhtthhopehgrhgvghhkhheslhhinhhugihfohhunhgurghtihhonhdrohhrghdprhgtphhtthhopehmfigrlhhlvgeskhgvrhhnvghlrdhorhhg X-GND-Sasl: mathieu.dubois-briand@bootlin.com Add driver for Maxim Integrated MAX7360 keypad controller, providing support for up to 64 keys, with a matrix of 8 columns and 8 rows. Signed-off-by: Mathieu Dubois-Briand --- drivers/input/keyboard/Kconfig | 12 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/max7360-keypad.c | 264 ++++++++++++++++++++++++++++++++ 3 files changed, 277 insertions(+) diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 721ab69e84ac..bba029f65cfa 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -421,6 +421,18 @@ config KEYBOARD_MAX7359 To compile this driver as a module, choose M here: the module will be called max7359_keypad. +config KEYBOARD_MAX7360 + tristate "Maxim MAX7360 Key Switch Controller" + select INPUT_MATRIXKMAP + depends on I2C + depends on MFD_MAX7360 + help + If you say yes here you get support for the keypad controller on the + Maxim MAX7360 I/O Expander. + + To compile this driver as a module, choose M here: the + module will be called max7360_keypad. + config KEYBOARD_MPR121 tristate "Freescale MPR121 Touchkey" depends on I2C diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 1e0721c30709..b49d32d4003d 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_KEYBOARD_LPC32XX) += lpc32xx-keys.o obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o +obj-$(CONFIG_KEYBOARD_MAX7360) += max7360-keypad.o obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o obj-$(CONFIG_KEYBOARD_MT6779) += mt6779-keypad.o obj-$(CONFIG_KEYBOARD_MTK_PMIC) += mtk-pmic-keys.o diff --git a/drivers/input/keyboard/max7360-keypad.c b/drivers/input/keyboard/max7360-keypad.c new file mode 100644 index 000000000000..bea4621c0622 --- /dev/null +++ b/drivers/input/keyboard/max7360-keypad.c @@ -0,0 +1,264 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2025 Bootlin + * + * Author: Mathieu Dubois-Briand + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct max7360_keypad { + struct input_dev *input; + unsigned int rows; + unsigned int cols; + unsigned int debounce_ms; + int irq; + struct regmap *regmap; + unsigned short keycodes[MAX7360_MAX_KEY_ROWS * MAX7360_MAX_KEY_COLS]; +}; + +static irqreturn_t max7360_keypad_irq(int irq, void *data) +{ + struct max7360_keypad *max7360_keypad = data; + unsigned int val; + unsigned int row, col; + unsigned int release; + unsigned int code; + int ret; + + do { + ret = regmap_read(max7360_keypad->regmap, MAX7360_REG_KEYFIFO, &val); + if (ret) { + dev_err(&max7360_keypad->input->dev, "Failed to read max7360 FIFO"); + return IRQ_NONE; + } + + /* FIFO overflow: ignore it and get next event. */ + if (val == MAX7360_FIFO_OVERFLOW) + dev_warn(&max7360_keypad->input->dev, "max7360 FIFO overflow"); + } while (val == MAX7360_FIFO_OVERFLOW); + + if (val == MAX7360_FIFO_EMPTY) { + dev_dbg(&max7360_keypad->input->dev, "Got a spurious interrupt"); + + return IRQ_NONE; + } + + row = FIELD_GET(MAX7360_FIFO_ROW, val); + col = FIELD_GET(MAX7360_FIFO_COL, val); + release = val & MAX7360_FIFO_RELEASE; + + code = MATRIX_SCAN_CODE(row, col, MAX7360_ROW_SHIFT); + + dev_dbg(&max7360_keypad->input->dev, "key[%d:%d] %s\n", row, col, + release ? "release" : "press"); + + input_event(max7360_keypad->input, EV_MSC, MSC_SCAN, code); + input_report_key(max7360_keypad->input, max7360_keypad->keycodes[code], !release); + input_sync(max7360_keypad->input); + + return IRQ_HANDLED; +} + +static int max7360_keypad_open(struct input_dev *pdev) +{ + struct max7360_keypad *max7360_keypad = input_get_drvdata(pdev); + int ret; + + /* + * Somebody is using the device: get out of sleep. + */ + ret = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_CONFIG, + MAX7360_CFG_SLEEP, MAX7360_CFG_SLEEP); + if (ret) { + dev_err(&max7360_keypad->input->dev, + "Failed to write max7360 configuration\n"); + return ret; + } + + return 0; +} + +static void max7360_keypad_close(struct input_dev *pdev) +{ + struct max7360_keypad *max7360_keypad = input_get_drvdata(pdev); + int ret; + + /* + * Nobody is using the device anymore: go to sleep. + */ + ret = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_CONFIG, MAX7360_CFG_SLEEP, 0); + if (ret) + dev_err(&max7360_keypad->input->dev, + "Failed to write max7360 configuration\n"); +} + +static int max7360_keypad_hw_init(struct max7360_keypad *max7360_keypad) +{ + unsigned int val; + int ret; + + val = max7360_keypad->debounce_ms - MAX7360_DEBOUNCE_MIN; + ret = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_DEBOUNCE, + MAX7360_DEBOUNCE, + FIELD_PREP(MAX7360_DEBOUNCE, val)); + if (ret) { + return dev_err_probe(&max7360_keypad->input->dev, ret, + "Failed to write max7360 debounce configuration\n"); + } + + ret = regmap_write_bits(max7360_keypad->regmap, MAX7360_REG_INTERRUPT, + MAX7360_INTERRUPT_TIME_MASK, + FIELD_PREP(MAX7360_INTERRUPT_TIME_MASK, 1)); + if (ret) { + return dev_err_probe(&max7360_keypad->input->dev, ret, + "Failed to write max7360 keypad interrupt configuration\n"); + } + + return 0; +} + +static int max7360_keypad_parse_dt(struct platform_device *pdev, + struct max7360_keypad *max7360_keypad, + bool *autorepeat) +{ + int ret; + + ret = matrix_keypad_parse_properties(pdev->dev.parent, &max7360_keypad->rows, + &max7360_keypad->cols); + if (ret) + return ret; + + if (!max7360_keypad->rows || !max7360_keypad->cols || + max7360_keypad->rows > MAX7360_MAX_KEY_ROWS || + max7360_keypad->cols > MAX7360_MAX_KEY_COLS) { + dev_err(&pdev->dev, + "Invalid number of columns or rows (%ux%u)\n", + max7360_keypad->cols, max7360_keypad->rows); + return -EINVAL; + } + + *autorepeat = device_property_read_bool(pdev->dev.parent, "autorepeat"); + + max7360_keypad->debounce_ms = MAX7360_DEBOUNCE_MIN; + ret = device_property_read_u32(pdev->dev.parent, "keypad-debounce-delay-ms", + &max7360_keypad->debounce_ms); + if (ret == -EINVAL) { + dev_info(&pdev->dev, "Using default keypad-debounce-delay-ms: %u\n", + max7360_keypad->debounce_ms); + } else if (ret < 0) { + dev_err(&pdev->dev, + "Failed to read keypad-debounce-delay-ms property\n"); + return ret; + } else if (max7360_keypad->debounce_ms < MAX7360_DEBOUNCE_MIN || + max7360_keypad->debounce_ms > MAX7360_DEBOUNCE_MAX) { + dev_err(&pdev->dev, + "Invalid keypad-debounce-delay-ms: %u, should be between %u and %u.\n", + max7360_keypad->debounce_ms, MAX7360_DEBOUNCE_MIN, MAX7360_DEBOUNCE_MAX); + return -EINVAL; + } + + return 0; +} + +static int max7360_keypad_probe(struct platform_device *pdev) +{ + struct max7360_keypad *max7360_keypad; + struct input_dev *input; + bool autorepeat; + int ret; + int irq; + + if (!pdev->dev.parent) + return dev_err_probe(&pdev->dev, -ENODEV, "No parent device\n"); + + irq = platform_get_irq_byname(to_platform_device(pdev->dev.parent), "intk"); + if (irq < 0) + return irq; + + max7360_keypad = devm_kzalloc(&pdev->dev, sizeof(*max7360_keypad), GFP_KERNEL); + if (!max7360_keypad) + return -ENOMEM; + + max7360_keypad->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!max7360_keypad->regmap) + return dev_err_probe(&pdev->dev, -ENODEV, "Could not get parent regmap\n"); + + ret = max7360_keypad_parse_dt(pdev, max7360_keypad, &autorepeat); + if (ret) + return ret; + + input = devm_input_allocate_device(pdev->dev.parent); + if (!input) + return -ENOMEM; + + max7360_keypad->input = input; + + input->id.bustype = BUS_I2C; + input->name = pdev->name; + input->open = max7360_keypad_open; + input->close = max7360_keypad_close; + + ret = matrix_keypad_build_keymap(NULL, NULL, MAX7360_MAX_KEY_ROWS, MAX7360_MAX_KEY_COLS, + max7360_keypad->keycodes, input); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "Failed to build keymap\n"); + + input_set_capability(input, EV_MSC, MSC_SCAN); + if (autorepeat) + __set_bit(EV_REP, input->evbit); + + input_set_drvdata(input, max7360_keypad); + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, max7360_keypad_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "max7360-keypad", max7360_keypad); + if (ret) + return dev_err_probe(&pdev->dev, ret, "Failed to register interrupt\n"); + + ret = input_register_device(input); + if (ret) + return dev_err_probe(&pdev->dev, ret, "Could not register input device\n"); + + platform_set_drvdata(pdev, max7360_keypad); + + ret = max7360_keypad_hw_init(max7360_keypad); + if (ret) + return dev_err_probe(&pdev->dev, ret, "Failed to initialize max7360 keypad\n"); + + device_init_wakeup(&pdev->dev, true); + ret = dev_pm_set_wake_irq(&pdev->dev, irq); + if (ret) + dev_warn(&pdev->dev, "Failed to set up wakeup irq: %d\n", ret); + + return 0; +} + +static void max7360_keypad_remove(struct platform_device *pdev) +{ + dev_pm_clear_wake_irq(&pdev->dev); +} + +static struct platform_driver max7360_keypad_driver = { + .driver = { + .name = "max7360-keypad", + }, + .probe = max7360_keypad_probe, + .remove = max7360_keypad_remove, +}; +module_platform_driver(max7360_keypad_driver); + +MODULE_DESCRIPTION("MAX7360 Keypad driver"); +MODULE_AUTHOR("Mathieu Dubois-Briand "); +MODULE_LICENSE("GPL");