[PATCH] Input: raydium_ts_i2c: Do not send zero length

[jeffrey.lin]

Add default write command package to prevent i2c quirk error of zero
data length as Raydium touch firmware update is executed.

Signed-off-by: jeffrey.lin <jeffrey....@rad-ic.com>
BUG=b:174207906
TEST=Successfully tested update Raydium touch firmware over 100 times
Change-Id: I311b0d26d7642bb800547cd0e87013be17cb7e1b
---
 drivers/input/touchscreen/raydium_i2c_ts.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c 
b/drivers/input/touchscreen/raydium_i2c_ts.c
index 603a948460d64..4d2d22a869773 100644
--- a/drivers/input/touchscreen/raydium_i2c_ts.c
+++ b/drivers/input/touchscreen/raydium_i2c_ts.c
@@ -445,6 +445,7 @@ static int raydium_i2c_write_object(struct i2c_client 
*client,
                                    enum raydium_bl_ack state)
 {
        int error;
+       static const u8 cmd[] = { 0xFF, 0x39 };
 
        error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len);
        if (error) {
@@ -453,7 +454,7 @@ static int raydium_i2c_write_object(struct i2c_client 
*client,
                return error;
        }
 
-       error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, NULL, 0);
+       error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd));
        if (error) {
                dev_err(&client->dev, "Ack obj command failed: %d\n", error);
                return error;
-- 
2.26.2