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    Subject[24/39] i2c/tsl2550: Fix lux value in extended mode
    2.6.31-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Michele Jr De Candia <michele.decandia@valueteam.com>

    commit 5f5bfb09d81c9a1d26238ae6668e584c14ae3daf upstream.

    According to the TAOS Application Note 'Controlling a Backlight with
    the TSL2550 Ambient Light Sensor' (page 14), the actual lux value in
    extended mode should be obtained multiplying the calculated lux value
    by 5.

    Signed-off-by: Michele Jr De Candia <michele.decandia@valueteam.com>
    Signed-off-by: Jean Delvare <khali@linux-fr.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    drivers/i2c/chips/tsl2550.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/drivers/i2c/chips/tsl2550.c
    +++ b/drivers/i2c/chips/tsl2550.c
    @@ -277,6 +277,7 @@ static DEVICE_ATTR(operating_mode, S_IWU

    static ssize_t __tsl2550_show_lux(struct i2c_client *client, char *buf)
    {
    + struct tsl2550_data *data = i2c_get_clientdata(client);
    u8 ch0, ch1;
    int ret;

    @@ -296,6 +297,8 @@ static ssize_t __tsl2550_show_lux(struct
    ret = tsl2550_calculate_lux(ch0, ch1);
    if (ret < 0)
    return ret;
    + if (data->operating_mode == 1)
    + ret *= 5;

    return sprintf(buf, "%d\n", ret);
    }



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