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[80.98.14.92]) by smtp.gmail.com with ESMTPSA id o16sm22412728wmi.29.2017.12.27.04.15.54 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 27 Dec 2017 04:15:54 -0800 (PST) From: Linus Walleij To: Dmitry Torokhov , linux-input@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Linus Walleij , =?utf-8?q?Heiko_St=C3=BCbner?= Subject: [PATCH] Input: misc: gpio_tilt: Delete driver Date: Wed, 27 Dec 2017 13:15:47 +0100 Message-Id: <20171227121547.20558-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.14.3 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This driver was merged in 2011 as a tool for detecting the orientation of a screen. The device driver assumes board file setup using the platform data from . But no boards in the kernel tree defines this platform data. As I am faced with refactoring drivers to use GPIO descriptors and pass decriptor tables from boards, or use the device tree device drivers like these creates a serious problem: I cannot fix them and cannot test them, not even compile-test them with a system actually using it (no in-tree boardfile). I suggest to delete this driver and rewrite it using device tree if it is still in use on actively maintained systems. I can also offer to rewrite it out of the blue using device tree if someone promise to test it and help me iterate it. Cc: Heiko Stübner Signed-off-by: Linus Walleij --- Heiko: not meaning to be militant here, just contain the situation, as stated: if you like the driver and can test it, I can reimplement it from scratch using device tree. --- Documentation/gpio/drivers-on-gpio.txt | 5 - Documentation/input/devices/gpio-tilt.rst | 103 --------------- drivers/input/misc/Kconfig | 14 -- drivers/input/misc/Makefile | 1 - drivers/input/misc/gpio_tilt_polled.c | 210 ------------------------------ include/linux/input/gpio_tilt.h | 74 ----------- 6 files changed, 407 deletions(-) delete mode 100644 Documentation/input/devices/gpio-tilt.rst delete mode 100644 drivers/input/misc/gpio_tilt_polled.c delete mode 100644 include/linux/input/gpio_tilt.h -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Acked-by: Heiko Stuebner diff --git a/Documentation/gpio/drivers-on-gpio.txt b/Documentation/gpio/drivers-on-gpio.txt index 9a78d385b92e..a2ccbab12eb7 100644 --- a/Documentation/gpio/drivers-on-gpio.txt +++ b/Documentation/gpio/drivers-on-gpio.txt @@ -28,11 +28,6 @@ hardware descriptions such as device tree or ACPI: - gpio-beeper: drivers/input/misc/gpio-beeper.c is used to provide a beep from an external speaker connected to a GPIO line. -- gpio-tilt-polled: drivers/input/misc/gpio_tilt_polled.c provides tilt - detection switches using GPIO, which is useful for your homebrewn pinball - machine if for nothing else. It can detect different tilt angles of the - monitored object. - - extcon-gpio: drivers/extcon/extcon-gpio.c is used when you need to read an external connector status, such as a headset line for an audio driver or an HDMI connector. It will provide a better userspace sysfs interface than GPIO. diff --git a/Documentation/input/devices/gpio-tilt.rst b/Documentation/input/devices/gpio-tilt.rst deleted file mode 100644 index fa6e64570aa7..000000000000 --- a/Documentation/input/devices/gpio-tilt.rst +++ /dev/null @@ -1,103 +0,0 @@ -Driver for tilt-switches connected via GPIOs -============================================ - -Generic driver to read data from tilt switches connected via gpios. -Orientation can be provided by one or more than one tilt switches, -i.e. each tilt switch providing one axis, and the number of axes -is also not limited. - - -Data structures ---------------- - -The array of struct gpio in the gpios field is used to list the gpios -that represent the current tilt state. - -The array of struct gpio_tilt_axis describes the axes that are reported -to the input system. The values set therein are used for the -input_set_abs_params calls needed to init the axes. - -The array of struct gpio_tilt_state maps gpio states to the corresponding -values to report. The gpio state is represented as a bitfield where the -bit-index corresponds to the index of the gpio in the struct gpio array. -In the same manner the values stored in the axes array correspond to -the elements of the gpio_tilt_axis-array. - - -Example -------- - -Example configuration for a single TS1003 tilt switch that rotates around -one axis in 4 steps and emits the current tilt via two GPIOs:: - - static int sg060_tilt_enable(struct device *dev) { - /* code to enable the sensors */ - }; - - static void sg060_tilt_disable(struct device *dev) { - /* code to disable the sensors */ - }; - - static struct gpio sg060_tilt_gpios[] = { - { SG060_TILT_GPIO_SENSOR1, GPIOF_IN, "tilt_sensor1" }, - { SG060_TILT_GPIO_SENSOR2, GPIOF_IN, "tilt_sensor2" }, - }; - - static struct gpio_tilt_state sg060_tilt_states[] = { - { - .gpios = (0 << 1) | (0 << 0), - .axes = (int[]) { - 0, - }, - }, { - .gpios = (0 << 1) | (1 << 0), - .axes = (int[]) { - 1, /* 90 degrees */ - }, - }, { - .gpios = (1 << 1) | (1 << 0), - .axes = (int[]) { - 2, /* 180 degrees */ - }, - }, { - .gpios = (1 << 1) | (0 << 0), - .axes = (int[]) { - 3, /* 270 degrees */ - }, - }, - }; - - static struct gpio_tilt_axis sg060_tilt_axes[] = { - { - .axis = ABS_RY, - .min = 0, - .max = 3, - .fuzz = 0, - .flat = 0, - }, - }; - - static struct gpio_tilt_platform_data sg060_tilt_pdata= { - .gpios = sg060_tilt_gpios, - .nr_gpios = ARRAY_SIZE(sg060_tilt_gpios), - - .axes = sg060_tilt_axes, - .nr_axes = ARRAY_SIZE(sg060_tilt_axes), - - .states = sg060_tilt_states, - .nr_states = ARRAY_SIZE(sg060_tilt_states), - - .debounce_interval = 100, - - .poll_interval = 1000, - .enable = sg060_tilt_enable, - .disable = sg060_tilt_disable, - }; - - static struct platform_device sg060_device_tilt = { - .name = "gpio-tilt-polled", - .id = -1, - .dev = { - .platform_data = &sg060_tilt_pdata, - }, - }; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 9f082a388388..4791e73839d9 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -268,20 +268,6 @@ config INPUT_GPIO_BEEPER To compile this driver as a module, choose M here: the module will be called gpio-beeper. -config INPUT_GPIO_TILT_POLLED - tristate "Polled GPIO tilt switch" - depends on GPIOLIB || COMPILE_TEST - select INPUT_POLLDEV - help - This driver implements support for tilt switches connected - to GPIO pins that are not capable of generating interrupts. - - The list of gpios to use and the mapping of their states - to specific angles is done via platform data. - - To compile this driver as a module, choose M here: the - module will be called gpio_tilt_polled. - config INPUT_GPIO_DECODER tristate "Polled GPIO Decoder Input driver" depends on GPIOLIB || COMPILE_TEST diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 4b6118d313fe..a8f61af865aa 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -36,7 +36,6 @@ obj-$(CONFIG_INPUT_DRV2665_HAPTICS) += drv2665.o obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o -obj-$(CONFIG_INPUT_GPIO_TILT_POLLED) += gpio_tilt_polled.o obj-$(CONFIG_INPUT_GPIO_DECODER) += gpio_decoder.o obj-$(CONFIG_INPUT_HISI_POWERKEY) += hisi_powerkey.o obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o diff --git a/drivers/input/misc/gpio_tilt_polled.c b/drivers/input/misc/gpio_tilt_polled.c deleted file mode 100644 index 6e217a45e39a..000000000000 --- a/drivers/input/misc/gpio_tilt_polled.c +++ /dev/null @@ -1,210 +0,0 @@ -/* - * Driver for tilt switches connected via GPIO lines - * not capable of generating interrupts - * - * Copyright (C) 2011 Heiko Stuebner - * - * based on: drivers/input/keyboard/gpio_keys_polled.c - * - * Copyright (C) 2007-2010 Gabor Juhos - * Copyright (C) 2010 Nuno Goncalves - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define DRV_NAME "gpio-tilt-polled" - -struct gpio_tilt_polled_dev { - struct input_polled_dev *poll_dev; - struct device *dev; - const struct gpio_tilt_platform_data *pdata; - - int last_state; - - int threshold; - int count; -}; - -static void gpio_tilt_polled_poll(struct input_polled_dev *dev) -{ - struct gpio_tilt_polled_dev *tdev = dev->private; - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - struct input_dev *input = dev->input; - struct gpio_tilt_state *tilt_state = NULL; - int state, i; - - if (tdev->count < tdev->threshold) { - tdev->count++; - } else { - state = 0; - for (i = 0; i < pdata->nr_gpios; i++) - state |= (!!gpio_get_value(pdata->gpios[i].gpio) << i); - - if (state != tdev->last_state) { - for (i = 0; i < pdata->nr_states; i++) - if (pdata->states[i].gpios == state) - tilt_state = &pdata->states[i]; - - if (tilt_state) { - for (i = 0; i < pdata->nr_axes; i++) - input_report_abs(input, - pdata->axes[i].axis, - tilt_state->axes[i]); - - input_sync(input); - } - - tdev->count = 0; - tdev->last_state = state; - } - } -} - -static void gpio_tilt_polled_open(struct input_polled_dev *dev) -{ - struct gpio_tilt_polled_dev *tdev = dev->private; - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - - if (pdata->enable) - pdata->enable(tdev->dev); - - /* report initial state of the axes */ - tdev->last_state = -1; - tdev->count = tdev->threshold; - gpio_tilt_polled_poll(tdev->poll_dev); -} - -static void gpio_tilt_polled_close(struct input_polled_dev *dev) -{ - struct gpio_tilt_polled_dev *tdev = dev->private; - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - - if (pdata->disable) - pdata->disable(tdev->dev); -} - -static int gpio_tilt_polled_probe(struct platform_device *pdev) -{ - const struct gpio_tilt_platform_data *pdata = - dev_get_platdata(&pdev->dev); - struct device *dev = &pdev->dev; - struct gpio_tilt_polled_dev *tdev; - struct input_polled_dev *poll_dev; - struct input_dev *input; - int error, i; - - if (!pdata || !pdata->poll_interval) - return -EINVAL; - - tdev = kzalloc(sizeof(struct gpio_tilt_polled_dev), GFP_KERNEL); - if (!tdev) { - dev_err(dev, "no memory for private data\n"); - return -ENOMEM; - } - - error = gpio_request_array(pdata->gpios, pdata->nr_gpios); - if (error) { - dev_err(dev, - "Could not request tilt GPIOs: %d\n", error); - goto err_free_tdev; - } - - poll_dev = input_allocate_polled_device(); - if (!poll_dev) { - dev_err(dev, "no memory for polled device\n"); - error = -ENOMEM; - goto err_free_gpios; - } - - poll_dev->private = tdev; - poll_dev->poll = gpio_tilt_polled_poll; - poll_dev->poll_interval = pdata->poll_interval; - poll_dev->open = gpio_tilt_polled_open; - poll_dev->close = gpio_tilt_polled_close; - - input = poll_dev->input; - - input->name = pdev->name; - input->phys = DRV_NAME"/input0"; - input->dev.parent = dev; - - input->id.bustype = BUS_HOST; - input->id.vendor = 0x0001; - input->id.product = 0x0001; - input->id.version = 0x0100; - - __set_bit(EV_ABS, input->evbit); - for (i = 0; i < pdata->nr_axes; i++) - input_set_abs_params(input, pdata->axes[i].axis, - pdata->axes[i].min, pdata->axes[i].max, - pdata->axes[i].fuzz, pdata->axes[i].flat); - - tdev->threshold = DIV_ROUND_UP(pdata->debounce_interval, - pdata->poll_interval); - - tdev->poll_dev = poll_dev; - tdev->dev = dev; - tdev->pdata = pdata; - - error = input_register_polled_device(poll_dev); - if (error) { - dev_err(dev, "unable to register polled device, err=%d\n", - error); - goto err_free_polldev; - } - - platform_set_drvdata(pdev, tdev); - - return 0; - -err_free_polldev: - input_free_polled_device(poll_dev); -err_free_gpios: - gpio_free_array(pdata->gpios, pdata->nr_gpios); -err_free_tdev: - kfree(tdev); - - return error; -} - -static int gpio_tilt_polled_remove(struct platform_device *pdev) -{ - struct gpio_tilt_polled_dev *tdev = platform_get_drvdata(pdev); - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - - input_unregister_polled_device(tdev->poll_dev); - input_free_polled_device(tdev->poll_dev); - - gpio_free_array(pdata->gpios, pdata->nr_gpios); - - kfree(tdev); - - return 0; -} - -static struct platform_driver gpio_tilt_polled_driver = { - .probe = gpio_tilt_polled_probe, - .remove = gpio_tilt_polled_remove, - .driver = { - .name = DRV_NAME, - }, -}; - -module_platform_driver(gpio_tilt_polled_driver); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Heiko Stuebner "); -MODULE_DESCRIPTION("Polled GPIO tilt driver"); -MODULE_ALIAS("platform:" DRV_NAME); diff --git a/include/linux/input/gpio_tilt.h b/include/linux/input/gpio_tilt.h deleted file mode 100644 index f9d932476a80..000000000000 --- a/include/linux/input/gpio_tilt.h +++ /dev/null @@ -1,74 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _INPUT_GPIO_TILT_H -#define _INPUT_GPIO_TILT_H - -/** - * struct gpio_tilt_axis - Axis used by the tilt switch - * @axis: Constant describing the axis, e.g. ABS_X - * @min: minimum value for abs_param - * @max: maximum value for abs_param - * @fuzz: fuzz value for abs_param - * @flat: flat value for abs_param - */ -struct gpio_tilt_axis { - int axis; - int min; - int max; - int fuzz; - int flat; -}; - -/** - * struct gpio_tilt_state - state description - * @gpios: bitfield of gpio target-states for the value - * @axes: array containing the axes settings for the gpio state - * The array indizes must correspond to the axes defined - * in platform_data - * - * This structure describes a supported axis settings - * and the necessary gpio-state which represent it. - * - * The n-th bit in the bitfield describes the state of the n-th GPIO - * from the gpios-array defined in gpio_regulator_config below. - */ -struct gpio_tilt_state { - int gpios; - int *axes; -}; - -/** - * struct gpio_tilt_platform_data - * @gpios: Array containing the gpios determining the tilt state - * @nr_gpios: Number of gpios - * @axes: Array of gpio_tilt_axis descriptions - * @nr_axes: Number of axes - * @states: Array of gpio_tilt_state entries describing - * the gpio state for specific tilts - * @nr_states: Number of states available - * @debounce_interval: debounce ticks interval in msecs - * @poll_interval: polling interval in msecs - for polling driver only - * @enable: callback to enable the tilt switch - * @disable: callback to disable the tilt switch - * - * This structure contains gpio-tilt-switch configuration - * information that must be passed by platform code to the - * gpio-tilt input driver. - */ -struct gpio_tilt_platform_data { - struct gpio *gpios; - int nr_gpios; - - struct gpio_tilt_axis *axes; - int nr_axes; - - struct gpio_tilt_state *states; - int nr_states; - - int debounce_interval; - - unsigned int poll_interval; - int (*enable)(struct device *dev); - void (*disable)(struct device *dev); -}; - -#endif