The MCP2221 driver should not connect to the hidraw userspace interface,
as it needs exclusive access to the chip.
If you want to use /dev/hidrawX with the MCP2221, you need to avoid
binding this driver to the device and use the hid generic driver instead
(e.g. using udev rules).
Signed-off-by: Enrik Berkhan <Enrik.Berkhan@xxxxxxx>
---
drivers/hid/hid-mcp2221.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/hid/hid-mcp2221.c b/drivers/hid/hid-mcp2221.c
index de52e9f7bb8c..0ca2a7b96825 100644
--- a/drivers/hid/hid-mcp2221.c
+++ b/drivers/hid/hid-mcp2221.c
@@ -840,12 +840,17 @@ static int mcp2221_probe(struct hid_device *hdev,
return ret;
}
- ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+ /* This driver uses the .raw_event callback and therefore does not need any
+ * HID_CONNECT_xxx flags. */
+ ret = hid_hw_start(hdev, 0);
if (ret) {
hid_err(hdev, "can't start hardware\n");
return ret;
}
+ hid_info(hdev, "USB HID v%x.%02x Device [%s] on %s\n", hdev->version >> 8,
+ hdev->version & 0xff, hdev->name, hdev->phys);
+
ret = hid_hw_open(hdev);
if (ret) {
hid_err(hdev, "can't open device\n");
@@ -870,8 +875,7 @@ static int mcp2221_probe(struct hid_device *hdev,
mcp->adapter.retries = 1;
mcp->adapter.dev.parent = &hdev->dev;
snprintf(mcp->adapter.name, sizeof(mcp->adapter.name),
- "MCP2221 usb-i2c bridge on hidraw%d",
- ((struct hidraw *)hdev->hidraw)->minor);
+ "MCP2221 usb-i2c bridge");
ret = i2c_add_adapter(&mcp->adapter);
if (ret) {
--
2.34.1
