shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 11:50:43 +09:00
Code Issues Packages Projects Releases Wiki Activity

Input: elan_i2c - clear INT before resetting controller

Browse Source 
[ Upstream commit 4b3c7dbbff ]

Some old touchpad FWs need to have interrupt cleared before issuing reset
command after updating firmware. We clear interrupt by attempting to read
full report from the controller, and discarding any data read.

Signed-off-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
KT Liao
2017-05-25 10:06:21 -07:00
committed by Greg Kroah-Hartman
parent 78aa52dab5
commit 12e0201eb2
1 changed files with 8 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/input/mouse/elan_i2c_i2c.c
View File

@@ -557,7 +557,14 @@ static int elan_i2c_finish_fw_update(struct i2c_client *client,
long ret;
int error;
int len;
u8 buffer[ETP_I2C_INF_LENGTH];
u8 buffer[ETP_I2C_REPORT_LEN];
len = i2c_master_recv(client, buffer, ETP_I2C_REPORT_LEN);
if (len != ETP_I2C_REPORT_LEN) {
error = len < 0 ? len : -EIO;
dev_warn(dev, "failed to read I2C data after FW WDT reset: %d (%d)\n",
error, len);
}
reinit_completion(completion);
enable_irq(client->irq);