[PATCH] driver: input :touchscreen : Fix calibration area lost as firmware update

[jeffrey.lin]

Touch calibration file will be lost as touch firmware version different from in 
device when doing firmware update Preious raydium_i2c touch driver. So this 
modification only select specific flash
partition for firmware update to make sure all the function properly.

Signed-off-by: jeffrey.lin <jeffrey....@rad-ic.com>
---
 drivers/input/touchscreen/raydium_i2c_ts.c | 34 ++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c 
b/drivers/input/touchscreen/raydium_i2c_ts.c
index a99fb5cac5a0..3aa40cfa2334 100644
--- a/drivers/input/touchscreen/raydium_i2c_ts.c
+++ b/drivers/input/touchscreen/raydium_i2c_ts.c
@@ -441,21 +441,41 @@ static int raydium_i2c_write_object(struct i2c_client 
*client,
        return 0;
 }
 
+static int raydium_i2c_flash_select(struct i2c_client *client)
+{
+       static const u8 cmd[2][2] = {
+               { 0x06, 0x01 },
+               { 0x02, 0xA1 },
+       };
+       int i;
+       int error;
+
+       for (i = 0; i < 2; i++) {
+               error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
+                                                RAYDIUM_WAIT_READY);
+               if (error) {
+                       dev_err(&client->dev,
+                               "flash select failed at step %d: %d\n", i, 
error);
+                       return error;
+               }
+       }
+
+       return 0;
+}
+
 static bool raydium_i2c_boot_trigger(struct i2c_client *client)
 {
-       static const u8 cmd[7][6] = {
+       static const u8 cmd[5][6] = {
                { 0x08, 0x0C, 0x09, 0x00, 0x50, 0xD7 },
                { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
                { 0x08, 0x04, 0x09, 0x00, 0x50, 0x00 },
                { 0x08, 0x04, 0x09, 0x00, 0x50, 0xA5 },
                { 0x08, 0x0C, 0x09, 0x00, 0x50, 0x00 },
-               { 0x06, 0x01, 0x00, 0x00, 0x00, 0x00 },
-               { 0x02, 0xA2, 0x00, 0x00, 0x00, 0x00 },
        };
        int i;
        int error;
 
-       for (i = 0; i < 7; i++) {
+       for (i = 0; i < 5; i++) {
                error = raydium_i2c_write_object(client, cmd[i], sizeof(cmd[i]),
                                                 RAYDIUM_WAIT_READY);
                if (error) {
@@ -689,6 +709,12 @@ static int raydium_i2c_do_update_firmware(struct 
raydium_data *ts,
                return error;
        }
 
+       error = raydium_i2c_flash_select(client);
+       if (error) {
+               dev_err(&client->dev, "send flash select fail: %d\n", error);
+               return error;
+       }
+
        msleep(RM_BOOT_DELAY_MS);
 
        data = fw->data;
-- 
2.12.2