android: remove timed output/gpio driver (9f6b6877) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/staging/android/Kconfig

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		@@ -14,20 +14,6 @@ config ASHMEM
		It is, in theory, a good memory allocator for low-memory devices,
		because it can discard shared memory units when under memory pressure.

		config ANDROID_TIMED_OUTPUT
		bool "Timed output class driver"
		default y

		config ANDROID_TIMED_GPIO
		tristate "Android timed gpio driver"
		depends on GPIOLIB \|\| COMPILE_TEST
		depends on ANDROID_TIMED_OUTPUT
		default n
		---help---
		Unlike generic gpio is to allow programs to access and manipulate gpio
		registers from user space, timed output/gpio is a system to allow changing
		a gpio pin and restore it automatically after a specified timeout.

		config ANDROID_LOW_MEMORY_KILLER
		bool "Android Low Memory Killer"
		---help---

drivers/staging/android/Makefile

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		@@ -3,8 +3,6 @@ ccflags-y += -I$(src) # needed for trace events
		obj-y += ion/

		obj-$(CONFIG_ASHMEM) += ashmem.o
		obj-$(CONFIG_ANDROID_TIMED_OUTPUT) += timed_output.o
		obj-$(CONFIG_ANDROID_TIMED_GPIO) += timed_gpio.o
		obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o
		obj-$(CONFIG_SYNC) += sync.o sync_debug.o
		obj-$(CONFIG_SW_SYNC) += sw_sync.o

drivers/staging/android/timed_gpio.c

deleted100644 → 0

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		/* drivers/misc/timed_gpio.c
		*
		* Copyright (C) 2008 Google, Inc.
		* Author: Mike Lockwood <lockwood@android.com>
		*
		* This software is licensed under the terms of the GNU General Public
		* License version 2, as published by the Free Software Foundation, and
		* may be copied, distributed, and modified under those terms.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		*/

		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/slab.h>
		#include <linux/hrtimer.h>
		#include <linux/err.h>
		#include <linux/gpio.h>
		#include <linux/ktime.h>

		#include "timed_output.h"
		#include "timed_gpio.h"

		struct timed_gpio_data {
		struct timed_output_dev dev;
		struct hrtimer timer;
		spinlock_t lock;
		unsigned gpio;
		int max_timeout;
		u8 active_low;
		};

		static enum hrtimer_restart gpio_timer_func(struct hrtimer *timer)
		{
		struct timed_gpio_data *data =
		container_of(timer, struct timed_gpio_data, timer);

		gpio_direction_output(data->gpio, data->active_low ? 1 : 0);
		return HRTIMER_NORESTART;
		}

		static int gpio_get_time(struct timed_output_dev *dev)
		{
		struct timed_gpio_data *data;
		ktime_t t;

		data = container_of(dev, struct timed_gpio_data, dev);

		if (!hrtimer_active(&data->timer))
		return 0;

		t = hrtimer_get_remaining(&data->timer);

		return ktime_to_ms(t);
		}

		static void gpio_enable(struct timed_output_dev *dev, int value)
		{
		struct timed_gpio_data *data =
		container_of(dev, struct timed_gpio_data, dev);
		unsigned long flags;

		spin_lock_irqsave(&data->lock, flags);

		/* cancel previous timer and set GPIO according to value */
		hrtimer_cancel(&data->timer);
		gpio_direction_output(data->gpio, data->active_low ? !value : !!value);

		if (value > 0) {
		if (value > data->max_timeout)
		value = data->max_timeout;

		hrtimer_start(&data->timer,
		ktime_set(value / 1000, (value % 1000) * 1000000),
		HRTIMER_MODE_REL);
		}

		spin_unlock_irqrestore(&data->lock, flags);
		}

		static int timed_gpio_probe(struct platform_device *pdev)
		{
		struct timed_gpio_platform_data *pdata = pdev->dev.platform_data;
		struct timed_gpio *cur_gpio;
		struct timed_gpio_data gpio_data, gpio_dat;
		int i, ret;

		if (!pdata)
		return -EBUSY;

		gpio_data = devm_kcalloc(&pdev->dev, pdata->num_gpios,
		sizeof(*gpio_data), GFP_KERNEL);
		if (!gpio_data)
		return -ENOMEM;

		for (i = 0; i < pdata->num_gpios; i++) {
		cur_gpio = &pdata->gpios[i];
		gpio_dat = &gpio_data[i];

		hrtimer_init(&gpio_dat->timer, CLOCK_MONOTONIC,
		HRTIMER_MODE_REL);
		gpio_dat->timer.function = gpio_timer_func;
		spin_lock_init(&gpio_dat->lock);

		gpio_dat->dev.name = cur_gpio->name;
		gpio_dat->dev.get_time = gpio_get_time;
		gpio_dat->dev.enable = gpio_enable;
		ret = gpio_request(cur_gpio->gpio, cur_gpio->name);
		if (ret < 0)
		goto err_out;
		ret = timed_output_dev_register(&gpio_dat->dev);
		if (ret < 0) {
		gpio_free(cur_gpio->gpio);
		goto err_out;
		}

		gpio_dat->gpio = cur_gpio->gpio;
		gpio_dat->max_timeout = cur_gpio->max_timeout;
		gpio_dat->active_low = cur_gpio->active_low;
		gpio_direction_output(gpio_dat->gpio, gpio_dat->active_low);
		}

		platform_set_drvdata(pdev, gpio_data);

		return 0;

		err_out:
		while (--i >= 0) {
		timed_output_dev_unregister(&gpio_data[i].dev);
		gpio_free(gpio_data[i].gpio);
		}

		return ret;
		}

		static int timed_gpio_remove(struct platform_device *pdev)
		{
		struct timed_gpio_platform_data *pdata = pdev->dev.platform_data;
		struct timed_gpio_data *gpio_data = platform_get_drvdata(pdev);
		int i;

		for (i = 0; i < pdata->num_gpios; i++) {
		timed_output_dev_unregister(&gpio_data[i].dev);
		gpio_free(gpio_data[i].gpio);
		}

		return 0;
		}

		static struct platform_driver timed_gpio_driver = {
		.probe = timed_gpio_probe,
		.remove = timed_gpio_remove,
		.driver = {
		.name = TIMED_GPIO_NAME,
		},
		};

		module_platform_driver(timed_gpio_driver);

		MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
		MODULE_DESCRIPTION("timed gpio driver");
		MODULE_LICENSE("GPL");

drivers/staging/android/timed_gpio.h

deleted100644 → 0

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		/* include/linux/timed_gpio.h
		*
		* Copyright (C) 2008 Google, Inc.
		*
		* This software is licensed under the terms of the GNU General Public
		* License version 2, as published by the Free Software Foundation, and
		* may be copied, distributed, and modified under those terms.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		*/

		#ifndef _LINUX_TIMED_GPIO_H
		#define _LINUX_TIMED_GPIO_H

		#define TIMED_GPIO_NAME "timed-gpio"

		struct timed_gpio {
		const char *name;
		unsigned gpio;
		int max_timeout;
		u8 active_low;
		};

		struct timed_gpio_platform_data {
		int num_gpios;
		struct timed_gpio *gpios;
		};

		#endif

drivers/staging/android/timed_output.c

deleted100644 → 0

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		/* drivers/misc/timed_output.c
		*
		* Copyright (C) 2009 Google, Inc.
		* Author: Mike Lockwood <lockwood@android.com>
		*
		* This software is licensed under the terms of the GNU General Public
		* License version 2, as published by the Free Software Foundation, and
		* may be copied, distributed, and modified under those terms.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		*/

		#define pr_fmt(fmt) "timed_output: " fmt

		#include <linux/init.h>
		#include <linux/export.h>
		#include <linux/types.h>
		#include <linux/device.h>
		#include <linux/fs.h>
		#include <linux/err.h>

		#include "timed_output.h"

		static struct class *timed_output_class;
		static atomic_t device_count;

		static ssize_t enable_show(struct device dev, struct device_attribute attr,
		char *buf)
		{
		struct timed_output_dev *tdev = dev_get_drvdata(dev);
		int remaining = tdev->get_time(tdev);

		return sprintf(buf, "%d\n", remaining);
		}

		static ssize_t enable_store(struct device dev, struct device_attribute attr,
		const char *buf, size_t size)
		{
		struct timed_output_dev *tdev = dev_get_drvdata(dev);
		int value;
		int rc;

		rc = kstrtoint(buf, 0, &value);
		if (rc != 0)
		return -EINVAL;

		tdev->enable(tdev, value);

		return size;
		}
		static DEVICE_ATTR_RW(enable);

		static struct attribute *timed_output_attrs[] = {
		&dev_attr_enable.attr,
		NULL,
		};
		ATTRIBUTE_GROUPS(timed_output);

		static int create_timed_output_class(void)
		{
		if (!timed_output_class) {
		timed_output_class = class_create(THIS_MODULE, "timed_output");
		if (IS_ERR(timed_output_class))
		return PTR_ERR(timed_output_class);
		atomic_set(&device_count, 0);
		timed_output_class->dev_groups = timed_output_groups;
		}

		return 0;
		}

		int timed_output_dev_register(struct timed_output_dev *tdev)
		{
		int ret;

		if (!tdev \|\| !tdev->name \|\| !tdev->enable \|\| !tdev->get_time)
		return -EINVAL;

		ret = create_timed_output_class();
		if (ret < 0)
		return ret;

		tdev->index = atomic_inc_return(&device_count);
		tdev->dev = device_create(timed_output_class, NULL,
		MKDEV(0, tdev->index), NULL, "%s", tdev->name);
		if (IS_ERR(tdev->dev))
		return PTR_ERR(tdev->dev);

		dev_set_drvdata(tdev->dev, tdev);
		tdev->state = 0;
		return 0;
		}
		EXPORT_SYMBOL_GPL(timed_output_dev_register);

		void timed_output_dev_unregister(struct timed_output_dev *tdev)
		{
		tdev->enable(tdev, 0);
		device_destroy(timed_output_class, MKDEV(0, tdev->index));
		}
		EXPORT_SYMBOL_GPL(timed_output_dev_unregister);

		static int __init timed_output_init(void)
		{
		return create_timed_output_class();
		}
		device_initcall(timed_output_init);