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path: root/drivers/input/keyboard
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Diffstat (limited to 'drivers/input/keyboard')
-rw-r--r--drivers/input/keyboard/cros_ec_keyb.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
index b379ed762878..38457d9641bd 100644
--- a/drivers/input/keyboard/cros_ec_keyb.c
+++ b/drivers/input/keyboard/cros_ec_keyb.c
@@ -27,6 +27,8 @@
#include <asm/unaligned.h>
+#define MAX_NUM_TOP_ROW_KEYS 15
+
/**
* struct cros_ec_keyb - Structure representing EC keyboard device
*
@@ -42,6 +44,9 @@
* @idev: The input device for the matrix keys.
* @bs_idev: The input device for non-matrix buttons and switches (or NULL).
* @notifier: interrupt event notifier for transport devices
+ * @function_row_physmap: An array of the encoded rows/columns for the top
+ * row function keys, in an order from left to right
+ * @num_function_row_keys: The number of top row keys in a custom keyboard
*/
struct cros_ec_keyb {
unsigned int rows;
@@ -58,6 +63,9 @@ struct cros_ec_keyb {
struct input_dev *idev;
struct input_dev *bs_idev;
struct notifier_block notifier;
+
+ u16 function_row_physmap[MAX_NUM_TOP_ROW_KEYS];
+ size_t num_function_row_keys;
};
/**
@@ -527,6 +535,11 @@ static int cros_ec_keyb_register_matrix(struct cros_ec_keyb *ckdev)
struct input_dev *idev;
const char *phys;
int err;
+ struct property *prop;
+ const __be32 *p;
+ u16 *physmap;
+ u32 key_pos;
+ int row, col;
err = matrix_keypad_parse_properties(dev, &ckdev->rows, &ckdev->cols);
if (err)
@@ -578,6 +591,21 @@ static int cros_ec_keyb_register_matrix(struct cros_ec_keyb *ckdev)
ckdev->idev = idev;
cros_ec_keyb_compute_valid_keys(ckdev);
+ physmap = ckdev->function_row_physmap;
+ of_property_for_each_u32(dev->of_node, "function-row-physmap",
+ prop, p, key_pos) {
+ if (ckdev->num_function_row_keys == MAX_NUM_TOP_ROW_KEYS) {
+ dev_warn(dev, "Only support up to %d top row keys\n",
+ MAX_NUM_TOP_ROW_KEYS);
+ break;
+ }
+ row = KEY_ROW(key_pos);
+ col = KEY_COL(key_pos);
+ *physmap = MATRIX_SCAN_CODE(row, col, ckdev->row_shift);
+ physmap++;
+ ckdev->num_function_row_keys++;
+ }
+
err = input_register_device(ckdev->idev);
if (err) {
dev_err(dev, "cannot register input device\n");
@@ -587,6 +615,51 @@ static int cros_ec_keyb_register_matrix(struct cros_ec_keyb *ckdev)
return 0;
}
+static ssize_t function_row_physmap_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t size = 0;
+ int i;
+ struct cros_ec_keyb *ckdev = dev_get_drvdata(dev);
+ u16 *physmap = ckdev->function_row_physmap;
+
+ for (i = 0; i < ckdev->num_function_row_keys; i++)
+ size += scnprintf(buf + size, PAGE_SIZE - size,
+ "%s%02X", size ? " " : "", physmap[i]);
+ if (size)
+ size += scnprintf(buf + size, PAGE_SIZE - size, "\n");
+
+ return size;
+}
+
+static DEVICE_ATTR_RO(function_row_physmap);
+
+static struct attribute *cros_ec_keyb_attrs[] = {
+ &dev_attr_function_row_physmap.attr,
+ NULL,
+};
+
+static umode_t cros_ec_keyb_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr,
+ int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct cros_ec_keyb *ckdev = dev_get_drvdata(dev);
+
+ if (attr == &dev_attr_function_row_physmap.attr &&
+ !ckdev->num_function_row_keys)
+ return 0;
+
+ return attr->mode;
+}
+
+static const struct attribute_group cros_ec_keyb_attr_group = {
+ .is_visible = cros_ec_keyb_attr_is_visible,
+ .attrs = cros_ec_keyb_attrs,
+};
+
+
static int cros_ec_keyb_probe(struct platform_device *pdev)
{
struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
@@ -617,6 +690,12 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
return err;
}
+ err = devm_device_add_group(dev, &cros_ec_keyb_attr_group);
+ if (err) {
+ dev_err(dev, "failed to create attributes. err=%d\n", err);
+ return err;
+ }
+
ckdev->notifier.notifier_call = cros_ec_keyb_work;
err = blocking_notifier_chain_register(&ckdev->ec->event_notifier,
&ckdev->notifier);