Messages in this thread Patch in this message | | | Date | Tue, 05 Jan 2010 12:02:20 -0800 | From | Greg KH <> | Subject | [24/39] i2c/tsl2550: Fix lux value in extended mode |
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2.6.31-stable review patch. If anyone has any objections, please let us know.
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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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