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| author | Michele Jr De Candia <michele.decandia@valueteam.com> | 2009-11-26 09:22:32 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-11-26 09:22:32 +0100 |
| commit | 5f5bfb09d81c9a1d26238ae6668e584c14ae3daf (patch) | |
| tree | bf709d54c9390eb2682017ce1586b8a9f7467f03 | |
| parent | a8a8a669ea13d792296737505adc43ccacf3a648 (diff) | |
| download | lwn-5f5bfb09d81c9a1d26238ae6668e584c14ae3daf.tar.gz lwn-5f5bfb09d81c9a1d26238ae6668e584c14ae3daf.zip | |
i2c/tsl2550: Fix lux value in extended mode
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>
| -rw-r--r-- | drivers/i2c/chips/tsl2550.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/i2c/chips/tsl2550.c b/drivers/i2c/chips/tsl2550.c index aa96bd2d27ea..a0702f36a72f 100644 --- a/drivers/i2c/chips/tsl2550.c +++ b/drivers/i2c/chips/tsl2550.c @@ -257,6 +257,7 @@ 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; @@ -274,6 +275,8 @@ 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); } |