I added the keys sysfs attribute to gpio-keys-polled.c. Please try this
patch (should apply on ubuntu-linux 4.3).
diff --git a/drivers/input/keyboard/gpio_keys_polled.c
b/drivers/input/keyboard/gpio_keys_polled.c
index 11e77a9..3a8ee50 100644
--- a/drivers/input/keyboard/gpio_keys_polled.c
+++ b/drivers/input/keyboard/gpio_keys_polled.c
@@ -43,6 +43,85 @@ struct gpio_keys_polled_dev {
struct gpio_keys_button_data data[0];
};
+/**
+ * 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 inline int get_n_events_by_type(int type)
+{
+ BUG_ON(type != EV_SW && type != EV_KEY);
+
+ return (type == EV_KEY) ? KEY_CNT : SW_CNT;
+}
+
+/**
+ * gpio_keys_polled_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)
+ *
+ * Returns 0 on success or negative errno on failure.
+ */
+static ssize_t gpio_keys_polled_attr_show_helper(
+ struct gpio_keys_polled_dev
*ddata,
+ char *buf, unsigned int type)
+{
+ 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_keys_button *bdata = &ddata->pdata->buttons[i];
+
+ if (bdata->type != type)
+ 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;
+}
+
+static ssize_t gpio_keys_polled_show_keys(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct gpio_keys_polled_dev *ddata = platform_get_drvdata(pdev);
+
+ return gpio_keys_polled_attr_show_helper(ddata, buf, EV_KEY);
+}
+
+/*
+ * ATTRIBUTES:
+ *
+ * /sys/devices/platform/gpio-keys-polled/keys [ro]
+ */
+static DEVICE_ATTR(keys, S_IRUGO, gpio_keys_polled_show_keys, NULL);
+
+static struct attribute *gpio_keys_polled_attrs[] = {
+ &dev_attr_keys.attr,
+ NULL,
+};
+
+static struct attribute_group gpio_keys_polled_attr_group = {
+ .attrs = gpio_keys_polled_attrs,
+};
+
static void gpio_keys_polled_check_state(struct input_dev *input,
struct gpio_keys_button *button,
struct gpio_keys_button_data *bdata)
@@ -286,6 +365,13 @@ static int gpio_keys_polled_probe(struct platform_device
*pdev)
bdev->pdata = pdata;
platform_set_drvdata(pdev, bdev);
+ error = sysfs_create_group(&pdev->dev.kobj,
&gpio_keys_polled_attr_group);
+ if (error) {
+ dev_err(dev, "Unable to export keys, error: %d\n",
+ error);
+ return error;
+ }
+
error = input_register_polled_device(poll_dev);
if (error) {
dev_err(dev, "unable to register polled device, err=%d\n",
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1347776
Title:
shutdown trigger on gpio_keys.X for armhf hardware
To manage notifications about this bug go to:
https://bugs.launchpad.net/systemd/+bug/1347776/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
