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

From: Joshua Clayton
Date: Wed Nov 04 2015 - 10:39:16 EST


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@xxxxxxxxx>
---
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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