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Message-Id: <1370299129-29199-1-git-send-email-mranostay@gmail.com> Date: Mon, 3 Jun 2013 22:38:49 +0000 From: Matt Ranostay <mranostay@...il.com> To: giometti@...ux.it Cc: linux-kernel@...r.kernel.org, koen.kooi@...il.com, pantelis.antoniou@...il.com, Matt Ranostay <mranostay@...il.com> Subject: [PATCH] tsl2550: fix lux1_input error in low light ADC channel 0 photodiode detects both infrared + visible light, but ADC channel 1 just detects infrared. However, the latter is a bit more sensitive in that range so complete darkness or low light causes a error condition in which the chan0 - chan1 is negative that results in a -EAGAIN. This patch changes the resulting lux1_input sysfs attribute message from "Resource temporarily unavailable" to a user-grokable lux value of 0. Signed-off-by: Matt Ranostay <mranostay@...il.com> --- drivers/misc/tsl2550.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/tsl2550.c b/drivers/misc/tsl2550.c index 1dfde4d..e58620b 100644 --- a/drivers/misc/tsl2550.c +++ b/drivers/misc/tsl2550.c @@ -178,7 +178,7 @@ static int tsl2550_calculate_lux(u8 ch0, u8 ch1) } else lux = 0; else - return -EAGAIN; + return 0; /* LUX range check */ return lux > TSL2550_MAX_LUX ? TSL2550_MAX_LUX : lux; -- 1.8.2.rc3.6.g407929c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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