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path: root/drivers/hid/i2c-hid/i2c-hid.c
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Diffstat (limited to 'drivers/hid/i2c-hid/i2c-hid.c')
-rw-r--r--drivers/hid/i2c-hid/i2c-hid.c77
1 files changed, 48 insertions, 29 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index 879b0ed701a3..c1336193b04b 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -35,6 +35,7 @@
#include <linux/hid.h>
#include <linux/mutex.h>
#include <linux/acpi.h>
+#include <linux/of.h>
#include <linux/i2c/i2c-hid.h>
@@ -756,29 +757,6 @@ static int i2c_hid_power(struct hid_device *hid, int lvl)
return ret;
}
-static int i2c_hid_hidinput_input_event(struct input_dev *dev,
- unsigned int type, unsigned int code, int value)
-{
- struct hid_device *hid = input_get_drvdata(dev);
- struct hid_field *field;
- int offset;
-
- if (type == EV_FF)
- return input_ff_event(dev, type, code, value);
-
- if (type != EV_LED)
- return -1;
-
- offset = hidinput_find_field(hid, type, code, &field);
-
- if (offset == -1) {
- hid_warn(dev, "event field not found\n");
- return -1;
- }
-
- return hid_set_field(field, offset, value);
-}
-
static struct hid_ll_driver i2c_hid_ll_driver = {
.parse = i2c_hid_parse,
.start = i2c_hid_start,
@@ -787,7 +765,6 @@ static struct hid_ll_driver i2c_hid_ll_driver = {
.close = i2c_hid_close,
.power = i2c_hid_power,
.request = i2c_hid_request,
- .hidinput_input_event = i2c_hid_hidinput_input_event,
};
static int i2c_hid_init_irq(struct i2c_client *client)
@@ -824,8 +801,8 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
* bytes 2-3 -> bcdVersion (has to be 1.00) */
ret = i2c_hid_command(client, &hid_descr_cmd, ihid->hdesc_buffer, 4);
- i2c_hid_dbg(ihid, "%s, ihid->hdesc_buffer: %*ph\n",
- __func__, 4, ihid->hdesc_buffer);
+ i2c_hid_dbg(ihid, "%s, ihid->hdesc_buffer: %4ph\n", __func__,
+ ihid->hdesc_buffer);
if (ret) {
dev_err(&client->dev,
@@ -897,8 +874,9 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client,
params[1].integer.value = 1;
params[2].type = ACPI_TYPE_INTEGER;
params[2].integer.value = 1; /* HID function */
- params[3].type = ACPI_TYPE_INTEGER;
- params[3].integer.value = 0;
+ params[3].type = ACPI_TYPE_PACKAGE;
+ params[3].package.count = 0;
+ params[3].package.elements = NULL;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DSM", &input, &buf))) {
dev_err(&client->dev, "device _DSM execution failed\n");
@@ -933,6 +911,42 @@ static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
}
#endif
+#ifdef CONFIG_OF
+static int i2c_hid_of_probe(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ struct device *dev = &client->dev;
+ u32 val;
+ int ret;
+
+ ret = of_property_read_u32(dev->of_node, "hid-descr-addr", &val);
+ if (ret) {
+ dev_err(&client->dev, "HID register address not provided\n");
+ return -ENODEV;
+ }
+ if (val >> 16) {
+ dev_err(&client->dev, "Bad HID register address: 0x%08x\n",
+ val);
+ return -EINVAL;
+ }
+ pdata->hid_descriptor_address = val;
+
+ return 0;
+}
+
+static const struct of_device_id i2c_hid_of_match[] = {
+ { .compatible = "hid-over-i2c" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, i2c_hid_of_match);
+#else
+static inline int i2c_hid_of_probe(struct i2c_client *client,
+ struct i2c_hid_platform_data *pdata)
+{
+ return -ENODEV;
+}
+#endif
+
static int i2c_hid_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
@@ -954,7 +968,11 @@ static int i2c_hid_probe(struct i2c_client *client,
if (!ihid)
return -ENOMEM;
- if (!platform_data) {
+ if (client->dev.of_node) {
+ ret = i2c_hid_of_probe(client, &ihid->pdata);
+ if (ret)
+ goto err;
+ } else if (!platform_data) {
ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
if (ret) {
dev_err(&client->dev,
@@ -1095,6 +1113,7 @@ static struct i2c_driver i2c_hid_driver = {
.owner = THIS_MODULE,
.pm = &i2c_hid_pm,
.acpi_match_table = ACPI_PTR(i2c_hid_acpi_match),
+ .of_match_table = of_match_ptr(i2c_hid_of_match),
},
.probe = i2c_hid_probe,