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android: remove timed output/gpio driver

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timed_output was only used by the Android vibrator HAL which has now
learned how to use LED triggers instead[1]. Any users of it in AOSP are
on ancient kernels. Adding support for LED triggers is purely DT changes
and proper kernel config.

[1] https://android.googlesource.com/platform%2Fhardware%2Flibhardware/+/61701df363310a5cbd95e3e1638baa9526e42c9b

Cc: John Stultz <john.stultz@linaro.org>
Cc: "Arve Hjønnevåg" <arve@android.com>
Cc: Riley Andrews <riandrews@android.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rob Herring 2016-03-24 15:58:17 -05:00 committed by Greg Kroah-Hartman
parent 64938182e7
commit 9f6b68774f
6 changed files with 0 additions and 362 deletions
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14
drivers/staging/android/Kconfig
View File

@ -14,20 +14,6 @@ config ASHMEM
It is, in theory, a good memory allocator for low-memory devices, It is, in theory, a good memory allocator for low-memory devices,
because it can discard shared memory units when under memory pressure. 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 config ANDROID_LOW_MEMORY_KILLER
bool "Android Low Memory Killer" bool "Android Low Memory Killer"
---help--- ---help---

2
drivers/staging/android/Makefile
View File

@ -3,8 +3,6 @@ ccflags-y += -I$(src) # needed for trace events
obj-y += ion/ obj-y += ion/
obj-$(CONFIG_ASHMEM) += ashmem.o 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-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o
obj-$(CONFIG_SYNC) += sync.o sync_debug.o obj-$(CONFIG_SYNC) += sync.o sync_debug.o
obj-$(CONFIG_SW_SYNC) += sw_sync.o obj-$(CONFIG_SW_SYNC) += sw_sync.o

166
drivers/staging/android/timed_gpio.c
View File

@ -1,166 +0,0 @@
/* 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");

33
drivers/staging/android/timed_gpio.h
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@ -1,33 +0,0 @@
/* 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

110
drivers/staging/android/timed_output.c
View File

@ -1,110 +0,0 @@
/* 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);

37
drivers/staging/android/timed_output.h
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@ -1,37 +0,0 @@
/* include/linux/timed_output.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_OUTPUT_H
#define _LINUX_TIMED_OUTPUT_H
struct timed_output_dev {
const char *name;
/* enable the output and set the timer */
void (*enable)(struct timed_output_dev *sdev, int timeout);
/* returns the current number of milliseconds remaining on the timer */
int (*get_time)(struct timed_output_dev *sdev);
/* private data */
struct device *dev;
int index;
int state;
};
int timed_output_dev_register(struct timed_output_dev *dev);
void timed_output_dev_unregister(struct timed_output_dev *dev);
#endif