From: Michele Jr De Candia Date: Thu, 26 Nov 2009 08:22:32 +0000 (+0100) Subject: i2c/tsl2550: Fix lux value in extended mode X-Git-Tag: v2.6.31.10~15 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b167b0c6a4ae732370eba9486b6274d6637fdd06;p=thirdparty%2Fkernel%2Fstable.git i2c/tsl2550: Fix lux value in extended mode 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 Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/i2c/chips/tsl2550.c b/drivers/i2c/chips/tsl2550.c index b96f3025e5882..ec0a7cab6c8b0 100644 --- a/drivers/i2c/chips/tsl2550.c +++ b/drivers/i2c/chips/tsl2550.c @@ -277,6 +277,7 @@ static DEVICE_ATTR(operating_mode, S_IWUSR | S_IRUGO, 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 i2c_client *client, char *buf) ret = tsl2550_calculate_lux(ch0, ch1); if (ret < 0) return ret; + if (data->operating_mode == 1) + ret *= 5; return sprintf(buf, "%d\n", ret); }