From: "james.chen" <james.chen@xxxxxxxxxx>
This patch is disable idle mode before firmware upgrade procedure.
BUG=chrome-os-partner:39373
TEST= Test Elan touchscreen on cyan project(kernel 3.18) without problems.
Signed-off-by: james.chen <james.chen@xxxxxxxxxx>
---
drivers/input/touchscreen/elants_i2c.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index 0efd766..6d3570e 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -605,6 +605,7 @@ static int elants_i2c_do_update_firmware(struct i2c_client *client,
const u8 enter_iap[] = { 0x45, 0x49, 0x41, 0x50 };
const u8 enter_iap2[] = { 0x54, 0x00, 0x12, 0x34 };
const u8 iap_ack[] = { 0x55, 0xaa, 0x33, 0xcc };
+ const u8 close_idle[] = {0x54, 0x2c, 0x01, 0x01};
u8 buf[HEADER_SIZE];
u16 send_id;
int page, n_fw_pages;
@@ -617,8 +618,13 @@ static int elants_i2c_do_update_firmware(struct i2c_client *client,
} else {
/* Start IAP Procedure */
dev_dbg(&client->dev, "Normal IAP procedure\n");
+ /* Close idle mode */
+ error = elants_i2c_send(client, close_idle, sizeof(close_idle));
+ if (error)
+ dev_err(&client->dev, "Failed close idle: %d\n", error);
+ msleep(60);
elants_i2c_sw_reset(client);
-
+ msleep(20);
error = elants_i2c_send(client, enter_iap, sizeof(enter_iap));
}
--
1.8.3.2
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