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| author | Michele Jr De Candia <michele.decandia@valueteam.com> | 2009-11-26 09:22:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-01-06 14:26:39 -0800 |
| commit | b167b0c6a4ae732370eba9486b6274d6637fdd06 (patch) | |
| tree | 3a7b800de3d410ea84ccb8f83da39bb71952120b | |
| parent | 0b8d9a7c4ac4e90adf8a499d91ebc9ca4513f295 (diff) | |
| download | lwn-b167b0c6a4ae732370eba9486b6274d6637fdd06.tar.gz lwn-b167b0c6a4ae732370eba9486b6274d6637fdd06.zip | |
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 <michele.decandia@valueteam.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 b96f3025e588..ec0a7cab6c8b 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); } |