linux-kernel - [PATCH 1/2] iio: light: opt3001: extract int. time constants

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Message-Id: <1452622180-12728-2-git-send-email-mail@alexanderkoch.net>
Date:	Tue, 12 Jan 2016 19:09:39 +0100
From:	Alexander Koch <mail@...xanderkoch.net>
To:	jic23@...nel.org
Cc:	knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
	mhornung.linux@...il.com, dannenberg@...com, balbi@...com,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alexander Koch <mail@...xanderkoch.net>
Subject: [PATCH 1/2] iio: light: opt3001: extract int. time constants

Extract integration times as #define constants. This prepares using them
for delay/timeout length determination.

Signed-off-by: Alexander Koch <mail@...xanderkoch.net>
Signed-off-by: Michael Hornung <mhornung.linux@...il.com>
---
 drivers/iio/light/opt3001.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c
index 01e111e..aefbd79 100644
--- a/drivers/iio/light/opt3001.c
+++ b/drivers/iio/light/opt3001.c
@@ -65,6 +65,9 @@
 #define OPT3001_REG_EXPONENT(n)		((n) >> 12)
 #define OPT3001_REG_MANTISSA(n)		((n) & 0xfff)
 
+#define OPT3001_INT_TIME_LONG		800000
+#define OPT3001_INT_TIME_SHORT		100000
+
 /*
  * Time to wait for conversion result to be ready. The device datasheet
  * worst-case max value is 880ms. Add some slack to be on the safe side.
@@ -325,13 +328,13 @@ static int opt3001_set_int_time(struct opt3001 *opt, int time)
 	reg = ret;
 
 	switch (time) {
-	case 100000:
+	case OPT3001_INT_TIME_SHORT:
 		reg &= ~OPT3001_CONFIGURATION_CT;
-		opt->int_time = 100000;
+		opt->int_time = OPT3001_INT_TIME_SHORT;
 		break;
-	case 800000:
+	case OPT3001_INT_TIME_LONG:
 		reg |= OPT3001_CONFIGURATION_CT;
-		opt->int_time = 800000;
+		opt->int_time = OPT3001_INT_TIME_LONG;
 		break;
 	default:
 		return -EINVAL;
@@ -597,9 +600,9 @@ static int opt3001_configure(struct opt3001 *opt)
 
 	/* Reflect status of the device's integration time setting */
 	if (reg & OPT3001_CONFIGURATION_CT)
-		opt->int_time = 800000;
+		opt->int_time = OPT3001_INT_TIME_LONG;
 	else
-		opt->int_time = 100000;
+		opt->int_time = OPT3001_INT_TIME_SHORT;
 
 	/* Ensure device is in shutdown initially */
 	opt3001_set_mode(opt, &reg, OPT3001_CONFIGURATION_M_SHUTDOWN);
-- 
2.7.0