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[68.180.127.24]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33c3311a111sm3920735eec.6.2026.09.19.01.36.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 19 Sep 2026 01:36:58 -0700 (PDT) From: Ethan Nelson-Moore To: Shuah Khan , Randy Dunlap , Dmitry Torokhov , Andres Salomon , Bjorn Helgaas , linux-gpio@vger.kernel.org, linux-doc@vger.kernel.org, linux-input@vger.kernel.org Cc: Hans-Christian Egtvedt , Ethan Nelson-Moore , Linus Walleij , Bartosz Golaszewski , Jonathan Corbet Subject: [PATCH] Input: gpio_mouse - remove driver that has never been used in the kernel Date: Sat, 19 Sep 2026 01:36:40 -0700 Message-ID: <20260919083655.586922-1-enelsonmoore@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The gpio_mouse driver was added in 2007, but it has never been referenced by any platform data or DTS files in the kernel, and it does not support ACPI probing. Therefore, it has clearly never been used by any users of unmodified mainline Linux. Remove it. Signed-off-by: Ethan Nelson-Moore --- .../driver-api/gpio/drivers-on-gpio.rst | 5 - drivers/input/mouse/Kconfig | 15 -- drivers/input/mouse/Makefile | 1 - drivers/input/mouse/gpio_mouse.c | 170 ------------------ 4 files changed, 191 deletions(-) delete mode 100644 drivers/input/mouse/gpio_mouse.c diff --git a/Documentation/driver-api/gpio/drivers-on-gpio.rst b/Documentation/driver-api/gpio/drivers-on-gpio.rst index 95572d2a94ce..e386d909bc08 100644 --- a/Documentation/driver-api/gpio/drivers-on-gpio.rst +++ b/Documentation/driver-api/gpio/drivers-on-gpio.rst @@ -21,11 +21,6 @@ hardware descriptions such as device tree or ACPI: GPIO line cannot generate interrupts, so it needs to be periodically polled by a timer. -- gpio_mouse: drivers/input/mouse/gpio_mouse.c is used to provide a mouse with - up to three buttons by simply using GPIOs and no mouse port. You can cut the - mouse cable and connect the wires to GPIO lines or solder a mouse connector - to the lines for a more permanent solution of this type. - - gpio-beeper: drivers/input/misc/gpio-beeper.c is used to provide a beep from an external speaker connected to a GPIO line. (If the beep is controlled by off/on, for an actual PWM waveform, see pwm-gpio below.) diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig index 074130d88953..5f2466c08b9a 100644 --- a/drivers/input/mouse/Kconfig +++ b/drivers/input/mouse/Kconfig @@ -332,21 +332,6 @@ config MOUSE_VSXXXAA described in the source file). This driver also works with the digitizer (VSXXX-AB) DEC produced. -config MOUSE_GPIO - tristate "GPIO mouse" - depends on GPIOLIB || COMPILE_TEST - help - This driver simulates a mouse on GPIO lines of various CPUs (and some - other chips). - - Say Y here if your device has buttons or a simple joystick connected - directly to GPIO lines. Your board-specific setup logic must also - provide a platform device and platform data saying which GPIOs are - used. - - To compile this driver as a module, choose M here: the - module will be called gpio_mouse. - config MOUSE_MAPLE tristate "Maple mouse (for the Dreamcast)" depends on MAPLE diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile index ed40f141691e..52c0a99853b0 100644 --- a/drivers/input/mouse/Makefile +++ b/drivers/input/mouse/Makefile @@ -11,7 +11,6 @@ obj-$(CONFIG_MOUSE_ATARI) += atarimouse.o obj-$(CONFIG_MOUSE_BCM5974) += bcm5974.o obj-$(CONFIG_MOUSE_CYAPA) += cyapatp.o obj-$(CONFIG_MOUSE_ELAN_I2C) += elan_i2c.o -obj-$(CONFIG_MOUSE_GPIO) += gpio_mouse.o obj-$(CONFIG_MOUSE_MAPLE) += maplemouse.o obj-$(CONFIG_MOUSE_PS2) += psmouse.o obj-$(CONFIG_MOUSE_RISCPC) += rpcmouse.o diff --git a/drivers/input/mouse/gpio_mouse.c b/drivers/input/mouse/gpio_mouse.c deleted file mode 100644 index 18ccbd45004a..000000000000 --- a/drivers/input/mouse/gpio_mouse.c +++ /dev/null @@ -1,170 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Driver for simulating a mouse on GPIO lines. - * - * Copyright (C) 2007 Atmel Corporation - * Copyright (C) 2017 Linus Walleij - */ - -#include -#include -#include -#include -#include -#include - -/** - * struct gpio_mouse - * @scan_ms: the scan interval in milliseconds. - * @up: GPIO line for up value. - * @down: GPIO line for down value. - * @left: GPIO line for left value. - * @right: GPIO line for right value. - * @bleft: GPIO line for left button. - * @bmiddle: GPIO line for middle button. - * @bright: GPIO line for right button. - * - * This struct must be added to the platform_device in the board code. - * It is used by the gpio_mouse driver to setup GPIO lines and to - * calculate mouse movement. - */ -struct gpio_mouse { - u32 scan_ms; - struct gpio_desc *up; - struct gpio_desc *down; - struct gpio_desc *left; - struct gpio_desc *right; - struct gpio_desc *bleft; - struct gpio_desc *bmiddle; - struct gpio_desc *bright; -}; - -/* - * Timer function which is run every scan_ms ms when the device is opened. - * The dev input variable is set to the input_dev pointer. - */ -static void gpio_mouse_scan(struct input_dev *input) -{ - struct gpio_mouse *gpio = input_get_drvdata(input); - int x, y; - - if (gpio->bleft) - input_report_key(input, BTN_LEFT, - gpiod_get_value(gpio->bleft)); - if (gpio->bmiddle) - input_report_key(input, BTN_MIDDLE, - gpiod_get_value(gpio->bmiddle)); - if (gpio->bright) - input_report_key(input, BTN_RIGHT, - gpiod_get_value(gpio->bright)); - - x = gpiod_get_value(gpio->right) - gpiod_get_value(gpio->left); - y = gpiod_get_value(gpio->down) - gpiod_get_value(gpio->up); - - input_report_rel(input, REL_X, x); - input_report_rel(input, REL_Y, y); - input_sync(input); -} - -static int gpio_mouse_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct gpio_mouse *gmouse; - struct input_dev *input; - int error; - - gmouse = devm_kzalloc(dev, sizeof(*gmouse), GFP_KERNEL); - if (!gmouse) - return -ENOMEM; - - /* Assign some default scanning time */ - error = device_property_read_u32(dev, "scan-interval-ms", - &gmouse->scan_ms); - if (error || gmouse->scan_ms == 0) { - dev_warn(dev, "invalid scan time, set to 50 ms\n"); - gmouse->scan_ms = 50; - } - - gmouse->up = devm_gpiod_get(dev, "up", GPIOD_IN); - if (IS_ERR(gmouse->up)) - return PTR_ERR(gmouse->up); - gmouse->down = devm_gpiod_get(dev, "down", GPIOD_IN); - if (IS_ERR(gmouse->down)) - return PTR_ERR(gmouse->down); - gmouse->left = devm_gpiod_get(dev, "left", GPIOD_IN); - if (IS_ERR(gmouse->left)) - return PTR_ERR(gmouse->left); - gmouse->right = devm_gpiod_get(dev, "right", GPIOD_IN); - if (IS_ERR(gmouse->right)) - return PTR_ERR(gmouse->right); - - gmouse->bleft = devm_gpiod_get_optional(dev, "button-left", GPIOD_IN); - if (IS_ERR(gmouse->bleft)) - return PTR_ERR(gmouse->bleft); - gmouse->bmiddle = devm_gpiod_get_optional(dev, "button-middle", - GPIOD_IN); - if (IS_ERR(gmouse->bmiddle)) - return PTR_ERR(gmouse->bmiddle); - gmouse->bright = devm_gpiod_get_optional(dev, "button-right", - GPIOD_IN); - if (IS_ERR(gmouse->bright)) - return PTR_ERR(gmouse->bright); - - input = devm_input_allocate_device(dev); - if (!input) - return -ENOMEM; - - input->name = pdev->name; - input->id.bustype = BUS_HOST; - - input_set_drvdata(input, gmouse); - - input_set_capability(input, EV_REL, REL_X); - input_set_capability(input, EV_REL, REL_Y); - if (gmouse->bleft) - input_set_capability(input, EV_KEY, BTN_LEFT); - if (gmouse->bmiddle) - input_set_capability(input, EV_KEY, BTN_MIDDLE); - if (gmouse->bright) - input_set_capability(input, EV_KEY, BTN_RIGHT); - - error = input_setup_polling(input, gpio_mouse_scan); - if (error) - return error; - - input_set_poll_interval(input, gmouse->scan_ms); - - error = input_register_device(input); - if (error) { - dev_err(dev, "could not register input device\n"); - return error; - } - - dev_dbg(dev, "%d ms scan time, buttons: %s%s%s\n", - gmouse->scan_ms, - gmouse->bleft ? "" : "left ", - gmouse->bmiddle ? "" : "middle ", - gmouse->bright ? "" : "right"); - - return 0; -} - -static const struct of_device_id gpio_mouse_of_match[] = { - { .compatible = "gpio-mouse", }, - { }, -}; -MODULE_DEVICE_TABLE(of, gpio_mouse_of_match); - -static struct platform_driver gpio_mouse_device_driver = { - .probe = gpio_mouse_probe, - .driver = { - .name = "gpio_mouse", - .of_match_table = gpio_mouse_of_match, - } -}; -module_platform_driver(gpio_mouse_device_driver); - -MODULE_AUTHOR("Hans-Christian Egtvedt "); -MODULE_DESCRIPTION("GPIO mouse driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:gpio_mouse"); /* work with hotplug and coldplug */ -- 2.43.0