linux-kernel - [PATCH 4/9] rtc-pcf2123: replace magic numbers with defines

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Message-Id: <e239e183b907e072b2360a138f52fbdc201e1997.1446587705.git.stillcompiling@gmail.com>
Date:	Wed,  4 Nov 2015 07:36:35 -0800
From:	Joshua Clayton <stillcompiling@...il.com>
To:	Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org,
	Joshua Clayton <stillcompiling@...il.com>
Subject: [PATCH 4/9] rtc-pcf2123: replace magic numbers with defines

All of the magic numbers pertain to register CTRL1.
document all the values in CTRL1 with defines from the datasheet

Signed-off-by: Joshua Clayton <stillcompiling@...il.com>
---
 drivers/rtc/rtc-pcf2123.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index 3acb2c8..257ce7d 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -234,7 +234,7 @@ static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm)
 			tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
 
 	/* Stop the counter first */
-	ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, 0x20);
+	ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_STOP);
 	if (ret < 0)
 		return ret;
 
@@ -253,7 +253,7 @@ static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm)
 		return ret;
 
 	/* Start the counter */
-	ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, 0x00);
+	ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_CLEAR);
 	if (ret < 0)
 		return ret;
 
@@ -280,13 +280,13 @@ static int pcf2123_probe(struct spi_device *spi)
 
 	/* Send a software reset command */
 	dev_dbg(&spi->dev, "resetting RTC\n");
-	ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, 0x58);
+	ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_SW_RESET);
 	if (ret < 0)
 		goto kfree_exit;
 
 	/* Stop the counter */
 	dev_dbg(&spi->dev, "stopping RTC\n");
-	ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, 0x20);
+	ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_STOP);
 	if (ret < 0)
 		goto kfree_exit;
 
@@ -298,7 +298,7 @@ static int pcf2123_probe(struct spi_device *spi)
 	if (ret < 0)
 		goto kfree_exit;
 
-	if (!(rxbuf[0] & 0x20)) {
+	if (!(rxbuf[0] & CTRL1_STOP)) {
 		dev_err(&spi->dev, "chip not found\n");
 		ret = -ENODEV;
 		goto kfree_exit;
@@ -309,7 +309,7 @@ static int pcf2123_probe(struct spi_device *spi)
 			(spi->max_speed_hz + 500) / 1000);
 
 	/* Start the counter */
-	ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, 0x00);
+	ret = pcf2123_write_reg(&spi->dev, PCF2123_REG_CTRL1, CTRL1_CLEAR);
 	if (ret < 0)
 		goto kfree_exit;
 
-- 
2.5.0

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