lkml.org 
[lkml]   [2012]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 05/20] Input: atmel_mxt_ts - dump mxt_read/write_reg
    Date
    For verbose on-the-wire debugging.
    Prints DUMP_LEN bytes (in hex) per line.

    Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
    ---
    drivers/input/touchscreen/atmel_mxt_ts.c | 31 ++++++++++++++++++++++++++++++
    1 files changed, 31 insertions(+), 0 deletions(-)

    diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
    index defd4e1..dd3919a 100644
    --- a/drivers/input/touchscreen/atmel_mxt_ts.c
    +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
    @@ -397,6 +397,33 @@ static int mxt_fw_write(struct i2c_client *client,
    return 0;
    }

    +#ifdef DEBUG
    +#define DUMP_LEN 16
    +static void mxt_dump_xfer(struct device *dev, const char *func, u16 reg,
    + u16 len, const u8 *val)
    +{
    + /* Rough guess for string size */
    + char str[DUMP_LEN * 3 + 2];
    + int i;
    + size_t n;
    +
    + for (i = 0, n = 0; i < len; i++) {
    + n += snprintf(&str[n], sizeof(str) - n, "%02x ", val[i]);
    + if ((i + 1) % DUMP_LEN == 0 || (i + 1) == len) {
    + dev_dbg(dev,
    + "%s(reg: %d len: %d offset: 0x%02x): %s\n",
    + func, reg, len, (i / DUMP_LEN) * DUMP_LEN,
    + str);
    + n = 0;
    + }
    + }
    +}
    +#undef DUMP_LEN
    +#else
    +static void mxt_dump_xfer(struct device *dev, const char *func, u16 reg,
    + u16 len, const u8 *val) { }
    +#endif
    +
    static int mxt_read_reg(struct i2c_client *client, u16 reg, u16 len, void *val)
    {
    struct i2c_msg xfer[2];
    @@ -422,6 +449,8 @@ static int mxt_read_reg(struct i2c_client *client, u16 reg, u16 len, void *val)
    return -EIO;
    }

    + mxt_dump_xfer(&client->dev, __func__, reg, len, val);
    +
    return 0;
    }

    @@ -435,6 +464,8 @@ static int mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
    buf[1] = (reg >> 8) & 0xff;
    memcpy(&buf[2], val, len);

    + mxt_dump_xfer(&client->dev, __func__, reg, len, val);
    +
    if (i2c_master_send(client, buf, count) != count) {
    dev_err(&client->dev, "%s: i2c write failed\n", __func__);
    return -EIO;
    --
    1.7.7.3


    \
     
     \ /
      Last update: 2012-03-13 13:13    [W:0.025 / U:30.924 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site