From: Edvard Holst <edvard.holst@xxxxxxxxx>
Lenovo use two different trackpoints in the fifth generation Thinkpad X1 Carbon. Both are accessible over SMBUS/RMI but the pnpIDs are missing. This patch is for the Elantech trackpoint specifically which also reports SMB version 3 so rmi_smbus needs to be updated in order to handle it.
For the record, I was not the first one to come up with this patch as it has been floating around the internet for a while now. However, I have spent significant time with testing and my efforts to find the original author of the patch have been unsuccessful.
Signed-off-by: Edvard Holst <edvard.holst@xxxxxxxxx>
---
drivers/input/mouse/synaptics.c | 1 +
drivers/input/rmi4/rmi_smbus.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 16c30460ef04..d44f1395c379 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -173,6 +173,7 @@ static const char * const smbus_pnp_ids[] = {
"LEN0046", /* X250 */
"LEN004a", /* W541 */
"LEN200f", /* T450s */
+ "LEN0073", /* X1 Carbon G5 (Elantech) */
NULL
};
diff --git a/drivers/input/rmi4/rmi_smbus.c b/drivers/input/rmi4/rmi_smbus.c
index 225025a0940c..2939a2f72019 100644
--- a/drivers/input/rmi4/rmi_smbus.c
+++ b/drivers/input/rmi4/rmi_smbus.c
@@ -322,7 +322,7 @@ static int rmi_smb_probe(struct i2c_client *client,
rmi_dbg(RMI_DEBUG_XPORT, &client->dev, "Smbus version is %d",
smbus_version);
- if (smbus_version != 2) {
+ if (smbus_version != 2 && smbus_version != 3) {
dev_err(&client->dev, "Unrecognized SMB version %d\n",
smbus_version);
return -ENODEV;
--
2.13.5
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