Release 4.11 drivers/input/keyboard/gpio_keys.c
/*
* Driver for keys on GPIO lines capable of generating interrupts.
*
* Copyright 2005 Phil Blundell
* Copyright 2010, 2011 David Jander <david@protonic.nl>
*
* 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 <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <linux/workqueue.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/spinlock.h>
struct gpio_button_data {
const struct gpio_keys_button *button;
struct input_dev *input;
struct gpio_desc *gpiod;
unsigned short *code;
struct timer_list release_timer;
unsigned int release_delay; /* in msecs, for IRQ-only buttons */
struct delayed_work work;
unsigned int software_debounce; /* in msecs, for GPIO-driven buttons */
unsigned int irq;
spinlock_t lock;
bool disabled;
bool key_pressed;
};
struct gpio_keys_drvdata {
const struct gpio_keys_platform_data *pdata;
struct input_dev *input;
struct mutex disable_lock;
unsigned short *keymap;
struct gpio_button_data data[0];
};
/*
* SYSFS interface for enabling/disabling keys and switches:
*
* There are 4 attributes under /sys/devices/platform/gpio-keys/
* keys [ro] - bitmap of keys (EV_KEY) which can be
* disabled
* switches [ro] - bitmap of switches (EV_SW) which can be
* disabled
* disabled_keys [rw] - bitmap of keys currently disabled
* disabled_switches [rw] - bitmap of switches currently disabled
*
* Userland can change these values and hence disable event generation
* for each key (or switch). Disabling a key means its interrupt line
* is disabled.
*
* For example, if we have following switches set up as gpio-keys:
* SW_DOCK = 5
* SW_CAMERA_LENS_COVER = 9
* SW_KEYPAD_SLIDE = 10
* SW_FRONT_PROXIMITY = 11
* This is read from switches:
* 11-9,5
* Next we want to disable proximity (11) and dock (5), we write:
* 11,5
* to file disabled_switches. Now proximity and dock IRQs are disabled.
* This can be verified by reading the file disabled_switches:
* 11,5
* If we now want to enable proximity (11) switch we write:
* 5
* to disabled_switches.
*
* We can disable only those keys which don't allow sharing the irq.
*/
/**
* get_n_events_by_type() - returns maximum number of events per @type
* @type: type of button (%EV_KEY, %EV_SW)
*
* Return value of this function can be used to allocate bitmap
* large enough to hold all bits for given type.
*/
static int get_n_events_by_type(int type)
{
BUG_ON(type != EV_SW && type != EV_KEY);
return (type == EV_KEY) ? KEY_CNT : SW_CNT;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mika Westerberg | 31 | 100.00% | 1 | 100.00% |
Total | 31 | 100.00% | 1 | 100.00% |
/**
* get_bm_events_by_type() - returns bitmap of supported events per @type
* @input: input device from which bitmap is retrieved
* @type: type of button (%EV_KEY, %EV_SW)
*
* Return value of this function can be used to allocate bitmap
* large enough to hold all bits for given type.
*/
static const unsigned long *get_bm_events_by_type(struct input_dev *dev,
int type)
{
BUG_ON(type != EV_SW && type != EV_KEY);
return (type == EV_KEY) ? dev->keybit : dev->swbit;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Dmitry Torokhov | 43 | 100.00% | 1 | 100.00% |
Total | 43 | 100.00% | 1 | 100.00% |
/**
* gpio_keys_disable_button() - disables given GPIO button
* @bdata: button data for button to be disabled
*
* Disables button pointed by @bdata. This is done by masking
* IRQ line. After this function is called, button won't generate
* input events anymore. Note that one can only disable buttons
* that don't share IRQs.
*
* Make sure that @bdata->disable_lock is locked when entering
* this function to avoid races when concurrent threads are
* disabling buttons at the same time.
*/
static void gpio_keys_disable_button(struct gpio_button_data *bdata)
{
if (!bdata->disabled) {
/*
* Disable IRQ and associated timer/work structure.
*/
disable_irq(bdata->irq);
if (bdata->gpiod)
cancel_delayed_work_sync(&bdata->work);
else
del_timer_sync(&bdata->release_timer);
bdata->disabled = true;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mika Westerberg | 44 | 77.19% | 1 | 25.00% |
Dmitry Torokhov | 11 | 19.30% | 1 | 25.00% |
Laxman Dewangan | 1 | 1.75% | 1 | 25.00% |
Geert Uytterhoeven | 1 | 1.75% | 1 | 25.00% |
Total | 57 | 100.00% | 4 | 100.00% |
/**
* gpio_keys_enable_button() - enables given GPIO button
* @bdata: button data for button to be disabled
*
* Enables given button pointed by @bdata.
*
* Make sure that @bdata->disable_lock is locked when entering
* this function to avoid races with concurrent threads trying
* to enable the same button at the same time.
*/
static void gpio_keys_enable_button(struct gpio_button_data *bdata)
{
if (bdata->disabled) {
enable_irq(bdata->irq);
bdata->disabled = false;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mika Westerberg | 31 | 96.88% | 1 | 50.00% |
Laxman Dewangan | 1 | 3.12% | 1 | 50.00% |
Total | 32 | 100.00% | 2 | 100.00% |
/**
* gpio_keys_attr_show_helper() - fill in stringified bitmap of buttons
* @ddata: pointer to drvdata
* @buf: buffer where stringified bitmap is written
* @type: button type (%EV_KEY, %EV_SW)
* @only_disabled: does caller want only those buttons that are
* currently disabled or all buttons that can be
* disabled
*
* This function writes buttons that can be disabled to @buf. If
* @only_disabled is true, then @buf contains only those buttons
* that are currently disabled. Returns 0 on success or negative
* errno on failure.
*/
static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata,
char *buf, unsigned int type,
bool only_disabled)
{
int n_events = get_n_events_by_type(type);
unsigned long *bits;
ssize_t ret;
int i;
bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL);
if (!bits)
return -ENOMEM;
for (i = 0; i < ddata->pdata->nbuttons; i++) {
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->button->type != type)
continue;
if (only_disabled && !bdata->disabled)
continue;
__set_bit(*bdata->code, bits);
}
ret = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", n_events, bits);
buf[ret++] = '\n';
buf[ret] = '\0';
kfree(bits);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mika Westerberg | 162 | 94.74% | 1 | 25.00% |
Tejun Heo | 5 | 2.92% | 1 | 25.00% |
Alexandre Pereira da Silva | 3 | 1.75% | 1 | 25.00% |
Hans de Goede | 1 | 0.58% | 1 | 25.00% |
Total | 171 | 100.00% | 4 | 100.00% |
/**
* gpio_keys_attr_store_helper() - enable/disable buttons based on given bitmap
* @ddata: pointer to drvdata
* @buf: buffer from userspace that contains stringified bitmap
* @type: button type (%EV_KEY, %EV_SW)
*
* This function parses stringified bitmap from @buf and disables/enables
* GPIO buttons accordingly. Returns 0 on success and negative error
* on failure.
*/
static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata,
const char *buf, unsigned int type)
{
int n_events = get_n_events_by_type(type);
const unsigned long *bitmap = get_bm_events_by_type(ddata->input, type);
unsigned long *bits;
ssize_t error;
int i;
bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL);
if (!bits)
return -ENOMEM;
error = bitmap_parselist(buf, bits, n_events);
if (error)
goto out;
/* First validate */
if (!bitmap_subset(bits, bitmap, n_events)) {
error = -EINVAL;
goto out;
}
for (i = 0; i < ddata->pdata->nbuttons; i++) {
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->button->type != type)
continue;
if (test_bit(*bdata->code, bits) &&
!bdata->button->can_disable) {
error = -EINVAL;
goto out;
}
}
mutex_lock(&ddata->disable_lock);
for (i = 0; i < ddata->pdata->nbuttons; i++) {
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->button->type != type)
continue;
if (test_bit(*bdata->code, bits))
gpio_keys_disable_button(bdata);
else
gpio_keys_enable_button(bdata);
}
mutex_unlock(&ddata->disable_lock);
out:
kfree(bits);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mika Westerberg | 240 | 83.92% | 1 | 20.00% |
Dmitry Torokhov | 37 | 12.94% | 1 | 20.00% |
Alexandre Pereira da Silva | 6 | 2.10% | 1 | 20.00% |
Hans de Goede | 2 | 0.70% | 1 | 20.00% |
Dmitry Baryshkov | 1 | 0.35% | 1 | 20.00% |
Total | 286 | 100.00% | 5 | 100.00% |
#define ATTR_SHOW_FN(name, type, only_disabled) \
static ssize_t gpio_keys_show_##name(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct platform_device *pdev = to_platform_device(dev); \
struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); \
\
return gpio_keys_attr_show_helper(ddata, buf, \
type, only_disabled); \
}
ATTR_SHOW_FN(keys, EV_KEY, false);
ATTR_SHOW_FN(switches, EV_SW, false);
ATTR_SHOW_FN(disabled_keys, EV_KEY, true);
ATTR_SHOW_FN(disabled_switches, EV_SW, true);
/*
* ATTRIBUTES:
*
* /sys/devices/platform/gpio-keys/keys [ro]
* /sys/devices/platform/gpio-keys/switches [ro]
*/
static DEVICE_ATTR(keys, S_IRUGO, gpio_keys_show_keys, NULL);
static DEVICE_ATTR(switches, S_IRUGO, gpio_keys_show_switches, NULL);
#define ATTR_STORE_FN(name, type) \
static ssize_t gpio_keys_store_##name(struct device *dev, \
struct device_attribute *attr, \
const char *buf, \
size_t count) \
{ \
struct platform_device *pdev = to_platform_device(dev); \
struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); \
ssize_t error; \
\
error = gpio_keys_attr_store_helper(ddata, buf, type); \
if (error) \
return error; \
\
return count; \
}
ATTR_STORE_FN(disabled_keys, EV_KEY);
ATTR_STORE_FN(disabled_switches, EV_SW);
/*
* ATTRIBUTES:
*
* /sys/devices/platform/gpio-keys/disabled_keys [rw]
* /sys/devices/platform/gpio-keys/disables_switches [rw]
*/
static DEVICE_ATTR(disabled_keys, S_IWUSR | S_IRUGO,
gpio_keys_show_disabled_keys,
gpio_keys_store_disabled_keys);
static DEVICE_ATTR(disabled_switches, S_IWUSR | S_IRUGO,
gpio_keys_show_disabled_switches,
gpio_keys_store_disabled_switches);
static struct attribute *gpio_keys_attrs[] = {
&dev_attr_keys.attr,
&dev_attr_switches.attr,
&dev_attr_disabled_keys.attr,
&dev_attr_disabled_switches.attr,
NULL,
};
static struct attribute_group gpio_keys_attr_group = {
.attrs = gpio_keys_attrs,
};
static void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
{
const struct gpio_keys_button *button = bdata->button;
struct input_dev *input = bdata->input;
unsigned int type = button->type ?: EV_KEY;
int state;
state = gpiod_get_value_cansleep(bdata->gpiod);
if (state < 0) {
dev_err(input->dev.parent,
"failed to get gpio state: %d\n", state);
return;
}
if (type == EV_ABS) {
if (state)
input_event(input, type, button->code, button->value);
} else {
input_event(input, type, *bdata->code, state);
}
input_sync(input);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Dmitry Baryshkov | 45 | 36.29% | 1 | 10.00% |
Alexander Stein | 30 | 24.19% | 1 | 10.00% |
Björn Andersson | 19 | 15.32% | 1 | 10.00% |
Uwe Kleine-König | 10 | 8.06% | 1 | 10.00% |
Geert Uytterhoeven | 10 | 8.06% | 1 | 10.00% |
Jani Nikula | 4 | 3.23% | 1 | 10.00% |
Daniel Mack | 2 | 1.61% | 1 | 10.00% |
Hans de Goede | 2 | 1.61% | 1 | 10.00% |
Laxman Dewangan | 1 | 0.81% | 1 | 10.00% |
Dmitry Torokhov | 1 | 0.81% | 1 | 10.00% |
Total | 124 | 100.00% | 10 | 100.00% |
static void gpio_keys_gpio_work_func(struct work_struct *work)
{
struct gpio_button_data *bdata =
container_of(work, struct gpio_button_data, work.work);
gpio_keys_gpio_report_event(bdata);
if (bdata->button->wakeup)
pm_relax(bdata->input->dev.parent);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Daniel Mack | 29 | 55.77% | 1 | 25.00% |
Neil Brown | 19 | 36.54% | 1 | 25.00% |
Dmitry Torokhov | 2 | 3.85% | 1 | 25.00% |
Laxman Dewangan | 2 | 3.85% | 1 | 25.00% |
Total | 52 | 100.00% | 4 | 100.00% |
static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
{
struct gpio_button_data *bdata = dev_id;
BUG_ON(irq != bdata->irq);
if (bdata->button->wakeup)
pm_stay_awake(bdata->input->dev.parent);
mod_delayed_work(system_wq,
&bdata->work,
msecs_to_jiffies(bdata->software_debounce));
return IRQ_HANDLED;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Laxman Dewangan | 46 | 67.65% | 1 | 25.00% |
Neil Brown | 15 | 22.06% | 1 | 25.00% |
Dmitry Torokhov | 5 | 7.35% | 1 | 25.00% |
Phil Blundell | 2 | 2.94% | 1 | 25.00% |
Total | 68 | 100.00% | 4 | 100.00% |
static void gpio_keys_irq_timer(unsigned long _data)
{
struct gpio_button_data *bdata = (struct gpio_button_data *)_data;
struct input_dev *input = bdata->input;
unsigned long flags;
spin_lock_irqsave(&bdata->lock, flags);
if (bdata->key_pressed) {
input_event(input, EV_KEY, *bdata->code, 0);
input_sync(input);
bdata->key_pressed = false;
}
spin_unlock_irqrestore(&bdata->lock, flags);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Laxman Dewangan | 87 | 98.86% | 1 | 50.00% |
Hans de Goede | 1 | 1.14% | 1 | 50.00% |
Total | 88 | 100.00% | 2 | 100.00% |
static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id)
{
struct gpio_button_data *bdata = dev_id;
struct input_dev *input = bdata->input;
unsigned long flags;
BUG_ON(irq != bdata->irq);
spin_lock_irqsave(&bdata->lock, flags);
if (!bdata->key_pressed) {
if (bdata->button->wakeup)
pm_wakeup_event(bdata->input->dev.parent, 0);
input_event(input, EV_KEY, *bdata->code, 1);
input_sync(input);
if (!bdata->release_delay) {
input_event(input, EV_KEY, *bdata->code, 0);
input_sync(input);
goto out;
}
bdata->key_pressed = true;
}
if (bdata->release_delay)
mod_timer(&bdata->release_timer,
jiffies + msecs_to_jiffies(bdata->release_delay));
out:
spin_unlock_irqrestore(&bdata->lock, flags);
return IRQ_HANDLED;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Laxman Dewangan | 92 | 52.27% | 1 | 9.09% |
Phil Blundell | 24 | 13.64% | 1 | 9.09% |
Neil Brown | 21 | 11.93% | 1 | 9.09% |
Jani Nikula | 14 | 7.95% | 2 | 18.18% |
Uwe Kleine-König | 7 | 3.98% | 1 | 9.09% |
Dmitry Baryshkov | 5 | 2.84% | 1 | 9.09% |
Dmitry Torokhov | 4 | 2.27% | 1 | 9.09% |
Hans de Goede | 4 | 2.27% | 1 | 9.09% |
David Brownell | 3 | 1.70% | 1 | 9.09% |
Grazvydas Ignotas | 2 | 1.14% | 1 | 9.09% |
Total | 176 | 100.00% | 11 | 100.00% |
static void gpio_keys_quiesce_key(void *data)
{
struct gpio_button_data *bdata = data;
if (bdata->gpiod)
cancel_delayed_work_sync(&bdata->work);
else
del_timer_sync(&bdata->release_timer);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexander Shiyan | 34 | 85.00% | 1 | 33.33% |
Dmitry Torokhov | 5 | 12.50% | 1 | 33.33% |
Geert Uytterhoeven | 1 | 2.50% | 1 | 33.33% |
Total | 40 | 100.00% | 3 | 100.00% |
static int gpio_keys_setup_key(struct platform_device *pdev,
struct input_dev *input,
struct gpio_keys_drvdata *ddata,
const struct gpio_keys_button *button,
int idx,
struct fwnode_handle *child)
{
const char *desc = button->desc ? button->desc : "gpio_keys";
struct device *dev = &pdev->dev;
struct gpio_button_data *bdata = &ddata->data[idx];
irq_handler_t isr;
unsigned long irqflags;
int irq;
int error;
bdata->input = input;
bdata->button = button;
spin_lock_init(&bdata->lock);
if (child) {
bdata->gpiod = devm_fwnode_get_gpiod_from_child(dev, NULL,
child,
GPIOD_IN,
desc);
if (IS_ERR(bdata->gpiod)) {
error = PTR_ERR(bdata->gpiod);
if (error == -ENOENT) {
/*
* GPIO is optional, we may be dealing with
* purely interrupt-driven setup.
*/
bdata->gpiod = NULL;
} else {
if (error != -EPROBE_DEFER)
dev_err(dev, "failed to get gpio: %d\n",
error);
return error;
}
}
} else if (gpio_is_valid(button->gpio)) {
/*
* Legacy GPIO number, so request the GPIO here and
* convert it to descriptor.
*/
unsigned flags = GPIOF_IN;
if (button->active_low)
flags |= GPIOF_ACTIVE_LOW;
error = devm_gpio_request_one(dev, button->gpio, flags, desc);
if (error < 0) {
dev_err(dev, "Failed to request GPIO %d, error %d\n",
button->gpio, error);
return error;
}
bdata->gpiod = gpio_to_desc(button->gpio);
if (!bdata->gpiod)
return -EINVAL;
}
if (bdata->gpiod) {
if (button->debounce_interval) {
error = gpiod_set_debounce(bdata->gpiod,
button->debounce_interval * 1000);
/* use timer if gpiolib doesn't provide debounce */
if (error < 0)
bdata->software_debounce =
button->debounce_interval;
}
if (button->irq) {
bdata->irq = button->irq;
} else {
irq = gpiod_to_irq(bdata->gpiod);
if (irq < 0) {
error = irq;
dev_err(dev,
"Unable to get irq number for GPIO %d, error %d\n",
button->gpio, error);
return error;
}
bdata->irq = irq;
}
INIT_DELAYED_WORK(&bdata->work, gpio_keys_gpio_work_func);
isr = gpio_keys_gpio_isr;
irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
} else {
if (!button->irq) {
dev_err(dev, "Found button without gpio or irq\n");
return -EINVAL;
}
bdata->irq = button->irq;
if (button->type && button->type != EV_KEY) {
dev_err(dev, "Only EV_KEY allowed for IRQ buttons.\n");
return -EINVAL;
}
bdata->release_delay = button->debounce_interval;
setup_timer(&bdata->release_timer,
gpio_keys_irq_timer, (unsigned long)bdata);
isr = gpio_keys_irq_isr;
irqflags = 0;
}
bdata->code = &ddata->keymap[idx];
*bdata->code = button->code;
input_set_capability(input, button->type ?: EV_KEY, *bdata->code);
/*
* Install custom action to cancel release timer and
* workqueue item.
*/
error = devm_add_action(dev, gpio_keys_quiesce_key, bdata);
if (error) {
dev_err(dev, "failed to register quiesce action, error: %d\n",
error);
return error;
}
/*
* If platform has specified that the button can be disabled,
* we don't want it to share the interrupt line.
*/
if (!button->can_disable)
irqflags |= IRQF_SHARED;
error = devm_request_any_context_irq(dev, bdata->irq, isr, irqflags,
desc, bdata);
if (error < 0) {
dev_err(dev, "Unable to claim irq %d; error %d\n",
bdata->irq, error);
return error;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Laxman Dewangan | 180 | 29.13% | 1 | 5.88% |
Dmitry Torokhov | 135 | 21.84% | 5 | 29.41% |
Ben Dooks | 121 | 19.58% | 1 | 5.88% |
Geert Uytterhoeven | 44 | 7.12% | 1 | 5.88% |
Alexander Shiyan | 43 | 6.96% | 1 | 5.88% |
Hans de Goede | 41 | 6.63% | 1 | 5.88% |
Mika Westerberg | 29 | 4.69% | 1 | 5.88% |
Grazvydas Ignotas | 17 | 2.75% | 1 | 5.88% |
Alexander Stein | 3 | 0.49% | 2 | 11.76% |
Andy Shevchenko | 2 | 0.32% | 1 | 5.88% |
Philippe Langlais | 2 | 0.32% | 1 | 5.88% |
Boris Brezillon | 1 | 0.16% | 1 | 5.88% |
Total | 618 | 100.00% | 17 | 100.00% |
static void gpio_keys_report_state(struct gpio_keys_drvdata *ddata)
{
struct input_dev *input = ddata->input;
int i;
for (i = 0; i < ddata->pdata->nbuttons; i++) {
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->gpiod)
gpio_keys_gpio_report_event(bdata);
}
input_sync(input);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Dmitry Torokhov | 70 | 98.59% | 1 | 50.00% |
Geert Uytterhoeven | 1 | 1.41% | 1 | 50.00% |
Total | 71 | 100.00% | 2 | 100.00% |
static int gpio_keys_open(struct input_dev *input)
{
struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
const struct gpio_keys_platform_data *pdata = ddata->pdata;
int error;
if (pdata->enable) {
error = pdata->enable(input->dev.parent);
if (error)
return error;
}
/* Report current state of buttons that are connected to GPIOs */
gpio_keys_report_state(ddata);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Shubhrajyoti Datta | 35 | 49.30% | 1 | 33.33% |
Dmitry Torokhov | 25 | 35.21% | 1 | 33.33% |
Alexandre Pereira da Silva | 11 | 15.49% | 1 | 33.33% |
Total | 71 | 100.00% | 3 | 100.00% |
static void gpio_keys_close(struct input_dev *input)
{
struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
const struct gpio_keys_platform_data *pdata = ddata->pdata;
if (pdata->disable)
pdata->disable(input->dev.parent);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Shubhrajyoti Datta | 36 | 75.00% | 1 | 50.00% |
Alexandre Pereira da Silva | 12 | 25.00% | 1 | 50.00% |
Total | 48 | 100.00% | 2 | 100.00% |
/*
* Handlers for alternative sources of platform_data
*/
/*
* Translate properties into platform_data
*/
static struct gpio_keys_platform_data *
gpio_keys_get_devtree_pdata(struct device *dev)
{
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button *button;
struct fwnode_handle *child;
int nbuttons;
nbuttons = device_get_child_node_count(dev);
if (nbuttons == 0)
return ERR_PTR(-ENODEV);
pdata = devm_kzalloc(dev,
sizeof(*pdata) + nbuttons * sizeof(*button),
GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
button = (struct gpio_keys_button *)(pdata + 1);
pdata->buttons = button;
pdata->nbuttons = nbuttons;
pdata->rep = device_property_read_bool(dev, "autorepeat");
device_property_read_string(dev, "label", &pdata->name);
device_for_each_child_node(dev, child) {
if (is_of_node(child))
button->irq =
irq_of_parse_and_map(to_of_node(child), 0);
if (fwnode_property_read_u32(child, "linux,code",
&button->code)) {
dev_err(dev, "Button without keycode\n");
fwnode_handle_put(child);
return ERR_PTR(-EINVAL);
}
fwnode_property_read_string(child, "label", &button->desc);
if (fwnode_property_read_u32(child, "linux,input-type",
&button->type))
button->type = EV_KEY;
button->wakeup =
fwnode_property_read_bool(child, "wakeup-source") ||
/* legacy name */
fwnode_property_read_bool(child, "gpio-key,wakeup");
button->can_disable =
fwnode_property_read_bool(child, "linux,can-disable");
if (fwnode_property_read_u32(child, "debounce-interval",
&button->debounce_interval))
button->debounce_interval = 5;
button++;
}
return pdata;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Dmitry Torokhov | 85 | 29.72% | 6 | 37.50% |
David Jander | 75 | 26.22% | 1 | 6.25% |
Alexandre Pereira da Silva | 62 | 21.68% | 1 | 6.25% |
Andy Shevchenko | 24 | 8.39% | 1 | 6.25% |
Tobias Klauser | 14 | 4.90% | 2 | 12.50% |
Laxman Dewangan | 10 | 3.50% | 1 | 6.25% |
Phil Blundell | 7 | 2.45% | 1 | 6.25% |
Shubhrajyoti Datta | 5 | 1.75% | 1 | 6.25% |
Mika Westerberg | 2 | 0.70% | 1 | 6.25% |
Ben Dooks | 2 | 0.70% | 1 | 6.25% |
Total | 286 | 100.00% | 16 | 100.00% |
static const struct of_device_id gpio_keys_of_match[] = {
{ .compatible = "gpio-keys", },
{ },
};
MODULE_DEVICE_TABLE(of, gpio_keys_of_match);
static int gpio_keys_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct gpio_keys_platform_data *pdata = dev_get_platdata(dev);
struct fwnode_handle *child = NULL;
struct gpio_keys_drvdata *ddata;
struct input_dev *input;
size_t size;
int i, error;
int wakeup = 0;
if (!pdata) {
pdata = gpio_keys_get_devtree_pdata(dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
}
size = sizeof(struct gpio_keys_drvdata) +
pdata->nbuttons * sizeof(struct gpio_button_data);
ddata = devm_kzalloc(dev, size, GFP_KERNEL);
if (!ddata) {
dev_err(dev, "failed to allocate state\n");
return -ENOMEM;
}
ddata->keymap = devm_kcalloc(dev,
pdata->nbuttons, sizeof(ddata->keymap[0]),
GFP_KERNEL);
if (!ddata->keymap)
return -ENOMEM;
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(dev, "failed to allocate input device\n");
return -ENOMEM;
}
ddata->pdata = pdata;
ddata->input = input;
mutex_init(&ddata->disable_lock);
platform_set_drvdata(pdev, ddata);
input_set_drvdata(input, ddata);
input->name = pdata->name ? : pdev->name;
input->phys = "gpio-keys/input0";