Commit 0f78ba96 authored by Dmitry Torokhov's avatar Dmitry Torokhov

Input: gpio_keys_polled - keep button data constant

Commit 633a21d8 ("input: gpio_keys_polled: Add support for GPIO
descriptors") placed gpio descriptor into gpio_keys_button structure, which
is supposed to be part of platform data and not modifiable by the driver.
To keep the data constant, let's move the descriptor to
gpio_keys_button_data structure instead.
Tested-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 8dd5e0b3
......@@ -624,7 +624,6 @@ gpio_keys_get_devtree_pdata(struct device *dev)
struct gpio_keys_button *button;
int error;
int nbuttons;
int i;
node = dev->of_node;
if (!node)
......@@ -640,19 +639,18 @@ gpio_keys_get_devtree_pdata(struct device *dev)
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
button = (struct gpio_keys_button *)(pdata + 1);
pdata->buttons = button;
pdata->nbuttons = nbuttons;
pdata->rep = !!of_get_property(node, "autorepeat", NULL);
of_property_read_string(node, "label", &pdata->name);
i = 0;
for_each_available_child_of_node(node, pp) {
enum of_gpio_flags flags;
button = &pdata->buttons[i++];
button->gpio = of_get_gpio_flags(pp, 0, &flags);
if (button->gpio < 0) {
error = button->gpio;
......@@ -694,6 +692,8 @@ gpio_keys_get_devtree_pdata(struct device *dev)
if (of_property_read_u32(pp, "debounce-interval",
&button->debounce_interval))
button->debounce_interval = 5;
button++;
}
if (pdata->nbuttons == 0)
......
......@@ -30,6 +30,7 @@
#define DRV_NAME "gpio-keys-polled"
struct gpio_keys_button_data {
struct gpio_desc *gpiod;
int last_state;
int count;
int threshold;
......@@ -46,7 +47,7 @@ struct gpio_keys_polled_dev {
};
static void gpio_keys_button_event(struct input_polled_dev *dev,
struct gpio_keys_button *button,
const struct gpio_keys_button *button,
int state)
{
struct gpio_keys_polled_dev *bdev = dev->private;
......@@ -70,15 +71,15 @@ static void gpio_keys_button_event(struct input_polled_dev *dev,
}
static void gpio_keys_polled_check_state(struct input_polled_dev *dev,
struct gpio_keys_button *button,
const struct gpio_keys_button *button,
struct gpio_keys_button_data *bdata)
{
int state;
if (bdata->can_sleep)
state = !!gpiod_get_value_cansleep(button->gpiod);
state = !!gpiod_get_value_cansleep(bdata->gpiod);
else
state = !!gpiod_get_value(button->gpiod);
state = !!gpiod_get_value(bdata->gpiod);
gpio_keys_button_event(dev, button, state);
......@@ -142,48 +143,35 @@ static void gpio_keys_polled_close(struct input_polled_dev *dev)
pdata->disable(bdev->dev);
}
static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct device *dev)
static struct gpio_keys_platform_data *
gpio_keys_polled_get_devtree_pdata(struct device *dev)
{
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button *button;
struct fwnode_handle *child;
int error;
int nbuttons;
nbuttons = device_get_child_node_count(dev);
if (nbuttons == 0)
return NULL;
return ERR_PTR(-EINVAL);
pdata = devm_kzalloc(dev, sizeof(*pdata) + nbuttons * sizeof(*button),
GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
button = (struct gpio_keys_button *)(pdata + 1);
pdata->buttons = button;
pdata->nbuttons = nbuttons;
pdata->rep = device_property_present(dev, "autorepeat");
device_property_read_u32(dev, "poll-interval", &pdata->poll_interval);
device_for_each_child_node(dev, child) {
struct gpio_desc *desc;
desc = devm_get_gpiod_from_child(dev, NULL, child);
if (IS_ERR(desc)) {
error = PTR_ERR(desc);
if (error != -EPROBE_DEFER)
dev_err(dev,
"Failed to get gpio flags, error: %d\n",
error);
fwnode_handle_put(child);
return ERR_PTR(error);
}
button = &pdata->buttons[pdata->nbuttons++];
button->gpiod = desc;
if (fwnode_property_read_u32(child, "linux,code", &button->code)) {
dev_err(dev, "Button without keycode: %d\n",
pdata->nbuttons - 1);
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);
}
......@@ -206,10 +194,9 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct
if (fwnode_property_read_u32(child, "debounce-interval",
&button->debounce_interval))
button->debounce_interval = 5;
}
if (pdata->nbuttons == 0)
return ERR_PTR(-EINVAL);
button++;
}
return pdata;
}
......@@ -220,7 +207,7 @@ static void gpio_keys_polled_set_abs_params(struct input_dev *input,
int i, min = 0, max = 0;
for (i = 0; i < pdata->nbuttons; i++) {
struct gpio_keys_button *button = &pdata->buttons[i];
const struct gpio_keys_button *button = &pdata->buttons[i];
if (button->type != EV_ABS || button->code != code)
continue;
......@@ -230,6 +217,7 @@ static void gpio_keys_polled_set_abs_params(struct input_dev *input,
if (button->value > max)
max = button->value;
}
input_set_abs_params(input, code, min, max, 0, 0);
}
......@@ -242,6 +230,7 @@ MODULE_DEVICE_TABLE(of, gpio_keys_polled_of_match);
static int gpio_keys_polled_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct fwnode_handle *child = NULL;
const struct gpio_keys_platform_data *pdata = dev_get_platdata(dev);
struct gpio_keys_polled_dev *bdev;
struct input_polled_dev *poll_dev;
......@@ -254,10 +243,6 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
pdata = gpio_keys_polled_get_devtree_pdata(dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
if (!pdata) {
dev_err(dev, "missing platform data\n");
return -EINVAL;
}
}
if (!pdata->poll_interval) {
......@@ -300,20 +285,40 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
__set_bit(EV_REP, input->evbit);
for (i = 0; i < pdata->nbuttons; i++) {
struct gpio_keys_button *button = &pdata->buttons[i];
const struct gpio_keys_button *button = &pdata->buttons[i];
struct gpio_keys_button_data *bdata = &bdev->data[i];
unsigned int type = button->type ?: EV_KEY;
if (button->wakeup) {
dev_err(dev, DRV_NAME " does not support wakeup\n");
fwnode_handle_put(child);
return -EINVAL;
}
/*
* Legacy GPIO number so request the GPIO here and
* convert it to descriptor.
*/
if (!button->gpiod && gpio_is_valid(button->gpio)) {
if (!dev_get_platdata(dev)) {
/* No legacy static platform data */
child = device_get_next_child_node(dev, child);
if (!child) {
dev_err(dev, "missing child device node\n");
return -EINVAL;
}
bdata->gpiod = devm_get_gpiod_from_child(dev, NULL,
child);
if (IS_ERR(bdata->gpiod)) {
error = PTR_ERR(bdata->gpiod);
if (error != -EPROBE_DEFER)
dev_err(dev,
"failed to get gpio: %d\n",
error);
fwnode_handle_put(child);
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)
......@@ -322,18 +327,22 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
error = devm_gpio_request_one(&pdev->dev, button->gpio,
flags, button->desc ? : DRV_NAME);
if (error) {
dev_err(dev, "unable to claim gpio %u, err=%d\n",
dev_err(dev,
"unable to claim gpio %u, err=%d\n",
button->gpio, error);
return error;
}
button->gpiod = gpio_to_desc(button->gpio);
bdata->gpiod = gpio_to_desc(button->gpio);
if (!bdata->gpiod) {
dev_err(dev,
"unable to convert gpio %u to descriptor\n",
button->gpio);
return -EINVAL;
}
}
if (IS_ERR(button->gpiod))
return PTR_ERR(button->gpiod);
bdata->can_sleep = gpiod_cansleep(button->gpiod);
bdata->can_sleep = gpiod_cansleep(bdata->gpiod);
bdata->last_state = -1;
bdata->threshold = DIV_ROUND_UP(button->debounce_interval,
pdata->poll_interval);
......@@ -344,6 +353,8 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
button->code);
}
fwnode_handle_put(child);
bdev->poll_dev = poll_dev;
bdev->dev = dev;
bdev->pdata = pdata;
......
......@@ -2,7 +2,6 @@
#define _GPIO_KEYS_H
struct device;
struct gpio_desc;
/**
* struct gpio_keys_button - configuration parameters
......@@ -18,7 +17,6 @@ struct gpio_desc;
* disable button via sysfs
* @value: axis value for %EV_ABS
* @irq: Irq number in case of interrupt keys
* @gpiod: GPIO descriptor
*/
struct gpio_keys_button {
unsigned int code;
......@@ -31,7 +29,6 @@ struct gpio_keys_button {
bool can_disable;
int value;
unsigned int irq;
struct gpio_desc *gpiod;
};
/**
......@@ -46,7 +43,7 @@ struct gpio_keys_button {
* @name: input device name
*/
struct gpio_keys_platform_data {
struct gpio_keys_button *buttons;
const struct gpio_keys_button *buttons;
int nbuttons;
unsigned int poll_interval;
unsigned int rep:1;
......
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