Make use of the device property API in this driver so that both OF based
systems and ACPI based systems can use this driver.
Suggested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Suggested-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/input/keyboard/gpio_keys.c | 141 ++++++++++++++++++-------------------
1 file changed, 69 insertions(+), 72 deletions(-)
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 0f04cb1..5576f2a 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -28,8 +28,6 @@
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/spinlock.h>
@@ -468,7 +466,8 @@ static void gpio_keys_quiesce_key(void *data)
static int gpio_keys_setup_key(struct platform_device *pdev,
struct input_dev *input,
struct gpio_button_data *bdata,
- const struct gpio_keys_button *button)
+ const struct gpio_keys_button *button,
+ struct fwnode_handle *child)
{
const char *desc = button->desc ? button->desc : "gpio_keys";
struct device *dev = &pdev->dev;
@@ -481,11 +480,28 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
bdata->button = button;
spin_lock_init(&bdata->lock);
- /*
- * Legacy GPIO number, so request the GPIO here and
- * convert it to descriptor.
- */
- if (gpio_is_valid(button->gpio)) {
+ if (child) {
+ bdata->gpiod = devm_get_gpiod_from_child(dev, NULL, child);
+ 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)
@@ -502,7 +518,9 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
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);
@@ -533,9 +551,10 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
} else {
if (!button->irq) {
- dev_err(dev, "No IRQ specified\n");
+ dev_err(dev, "Found button without gpio or irq\n");
return -EINVAL;
}
+
bdata->irq = button->irq;
if (button->type && button->type != EV_KEY) {
@@ -627,24 +646,18 @@ static void gpio_keys_close(struct input_dev *input)
* Handlers for alternative sources of platform_data
*/
-#ifdef CONFIG_OF
/*
- * Translate OpenFirmware node properties into platform_data
+ * Translate properties into platform_data
*/
static struct gpio_keys_platform_data *
gpio_keys_get_devtree_pdata(struct device *dev)
{
- struct device_node *node, *pp;
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button *button;
- int error;
+ struct fwnode_handle *child;
int nbuttons;
- node = dev->of_node;
- if (!node)
- return ERR_PTR(-ENODEV);
-
- nbuttons = of_get_available_child_count(node);
+ nbuttons = device_get_child_node_count(dev);
if (nbuttons == 0)
return ERR_PTR(-ENODEV);
@@ -659,64 +672,43 @@ gpio_keys_get_devtree_pdata(struct device *dev)
pdata->buttons = button;
pdata->nbuttons = nbuttons;
- pdata->rep = !!of_get_property(node, "autorepeat", NULL);
+ pdata->rep = device_property_read_bool(dev, "autorepeat");
- of_property_read_string(node, "label", &pdata->name);
+ device_property_read_string(dev, "label", &pdata->name);
- for_each_available_child_of_node(node, pp) {
- enum of_gpio_flags flags;
+ device_for_each_child_node(dev, child) {
+ if (is_of_node(child))
+ button->irq =
+ irq_of_parse_and_map(to_of_node(child), 0);
- button->gpio = of_get_gpio_flags(pp, 0, &flags);
- if (button->gpio < 0) {
- error = button->gpio;
- if (error != -ENOENT) {
- if (error != -EPROBE_DEFER)
- dev_err(dev,
- "Failed to get gpio flags, error: %d\n",
- error);
- of_node_put(pp);
- return ERR_PTR(error);
- }
- } else {
- button->active_low = flags & OF_GPIO_ACTIVE_LOW;
- }
-
- button->irq = irq_of_parse_and_map(pp, 0);
-
- if (!gpio_is_valid(button->gpio) && !button->irq) {
- dev_err(dev, "Found button without gpios or irqs\n");
- of_node_put(pp);
- return ERR_PTR(-EINVAL);
- }
-
- if (of_property_read_u32(pp, "linux,code", &button->code)) {
- dev_err(dev, "Button without keycode: 0x%x\n",
- button->gpio);
- of_node_put(pp);
+ 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);
}
- button->desc = of_get_property(pp, "label", NULL);
+ fwnode_property_read_string(child, "label", &button->desc);
- if (of_property_read_u32(pp, "linux,input-type", &button->type))
+ if (fwnode_property_read_u32(child, "linux,input-type",
+ &button->type))
button->type = EV_KEY;
- button->wakeup = of_property_read_bool(pp, "wakeup-source") ||
- /* legacy name */
- of_property_read_bool(pp, "gpio-key,wakeup");
+ button->wakeup =
+ fwnode_property_read_bool(child, "wakeup-source") ||
+ /* legacy name */
+ fwnode_property_read_bool(child, "gpio-key,wakeup");
- button->can_disable = !!of_get_property(pp, "linux,can-disable", NULL);
+ button->can_disable =
+ fwnode_property_read_bool(child, "linux,can-disable");
- if (of_property_read_u32(pp, "debounce-interval",
+ if (fwnode_property_read_u32(child, "debounce-interval",
&button->debounce_interval))
button->debounce_interval = 5;
button++;
}
- if (pdata->nbuttons == 0)
- return ERR_PTR(-EINVAL);
-
return pdata;
}
@@ -726,20 +718,11 @@ static const struct of_device_id gpio_keys_of_match[] = {
};
MODULE_DEVICE_TABLE(of, gpio_keys_of_match);
-#else
-
-static inline struct gpio_keys_platform_data *
-gpio_keys_get_devtree_pdata(struct device *dev)
-{
- return ERR_PTR(-ENODEV);
-}
-
-#endif
-
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;
@@ -792,14 +775,28 @@ static int gpio_keys_probe(struct platform_device *pdev)
const struct gpio_keys_button *button = &pdata->buttons[i];
struct gpio_button_data *bdata = &ddata->data[i];
- error = gpio_keys_setup_key(pdev, input, bdata, button);
- if (error)
+ if (!dev_get_platdata(dev)) {
+ child = device_get_next_child_node(&pdev->dev, child);
+ if (!child) {
+ dev_err(&pdev->dev,
+ "missing child device node for entry %d\n",
+ i);
+ return -EINVAL;
+ }
+ }
+
+ error = gpio_keys_setup_key(pdev, input, bdata, button, child);
+ if (error) {
+ fwnode_handle_put(child);
return error;
+ }
if (button->wakeup)
wakeup = 1;
}
+ fwnode_handle_put(child);
+
error = sysfs_create_group(&pdev->dev.kobj, &gpio_keys_attr_group);
if (error) {
dev_err(dev, "Unable to export keys/switches, error: %d\n",
@@ -889,7 +886,7 @@ static struct platform_driver gpio_keys_device_driver = {
.driver = {
.name = "gpio-keys",
.pm = &gpio_keys_pm_ops,
- .of_match_table = of_match_ptr(gpio_keys_of_match),
+ .of_match_table = gpio_keys_of_match,
}
};
--
2.8.0.rc3.226.g39d4020
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