diff options
| author | Nick Dyer <nick.dyer@itdev.co.uk> | 2012-09-03 15:46:11 +0100 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 12:37:47 -0700 |
| commit | e5f4ec49203de5093d176067a07a973776740ebf (patch) | |
| tree | e8e9fda6b39fe39c47006617a80e1b49062aadbd /drivers/input/touchscreen/atmel_mxt_ts.c | |
| parent | fadf8df2c6a299915824a936007cf17b3ae9f993 (diff) | |
Input: atmel_mxt_ts - Read info block CRC
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Rebase-Id: Rec5a99be5607d5296a38df162f52c3a2bc9716a6
Diffstat (limited to 'drivers/input/touchscreen/atmel_mxt_ts.c')
| -rw-r--r-- | drivers/input/touchscreen/atmel_mxt_ts.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 18274f0b0e8d..7a07cfda50fe 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -286,6 +286,7 @@ struct mxt_data { u8 is_stopped; u8 max_reportid; u32 config_crc; + u32 info_block_crc; u8 num_touchids; u8 *msg_buf; u8 last_message_count; @@ -1271,6 +1272,23 @@ static int mxt_check_reg_init(struct mxt_data *data) return 0; } +static int mxt_read_info_block_crc(struct mxt_data *data) +{ + int ret; + u16 offset; + u8 buf[3]; + + offset = MXT_OBJECT_START + MXT_OBJECT_SIZE * data->info.object_num; + + ret = mxt_read_reg(data->client, offset, sizeof(buf), buf); + if (ret) + return ret; + + data->info_block_crc = (buf[2] << 16) | (buf[1] << 8) | buf[0]; + + return 0; +} + static int mxt_get_object_table(struct mxt_data *data) { struct i2c_client *client = data->client; @@ -1480,6 +1498,12 @@ static int mxt_initialize(struct mxt_data *data) return error; } + /* Read information block CRC */ + error = mxt_read_info_block_crc(data); + if (error) { + dev_err(&client->dev, "Error %d reading info block CRC\n", error); + } + error = mxt_probe_power_cfg(data); if (error) { dev_err(&client->dev, "Failed to initialize power cfg\n"); |