rtc: pcf2127: Update Kconfig and code style

Unfortunately version 2 of this patch was applied which was missing some
changes. Fix this.

Signed-off-by: Meng Yi <meng.yi@nxp.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/rtc/Kconfig

@@ -17,6 +17,10 @@ config RTC_PCF2127
 	bool "Enable PCF2127 driver"
 	depends on DM_RTC
 	help
-	  Enable pcf2127 driver which provides rtc get and set function
+	  The PCF2127 is a CMOS Real Time Clock (RTC) and calendar with an integrated
+	  Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz
+	  crystal optimized for very high accuracy and very low power consumption. The PCF2127
+	  has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a
+	  programmable watchdog function, a timestamp function, and many other features.
 
 endmenu

drivers/rtc/pcf2127.c

@@ -11,21 +11,21 @@
 #include <i2c.h>
 #include <rtc.h>
 
-#define PCF2127_REG_CTRL1	(0x00)
-#define PCF2127_REG_CTRL2	(0x01)
-#define PCF2127_REG_CTRL3	(0x02)
-#define PCF2127_REG_SC		(0x03)  /* datetime */
-#define PCF2127_REG_MN		(0x04)
-#define PCF2127_REG_HR		(0x05)
-#define PCF2127_REG_DM		(0x06)
-#define PCF2127_REG_DW		(0x07)
-#define PCF2127_REG_MO		(0x08)
-#define PCF2127_REG_YR		(0x09)
+#define PCF2127_REG_CTRL1	0x00
+#define PCF2127_REG_CTRL2	0x01
+#define PCF2127_REG_CTRL3	0x02
+#define PCF2127_REG_SC		0x03
+#define PCF2127_REG_MN		0x04
+#define PCF2127_REG_HR		0x05
+#define PCF2127_REG_DM		0x06
+#define PCF2127_REG_DW		0x07
+#define PCF2127_REG_MO		0x08
+#define PCF2127_REG_YR		0x09
 
 static int pcf2127_rtc_set(struct udevice *dev, const struct rtc_time *tm)
 {
 	uchar buf[8];
-	int i = 0;
+	int i = 0, ret;
 
 	/* start register address */
 	buf[i++] = PCF2127_REG_SC;
@@ -44,21 +44,22 @@ static int pcf2127_rtc_set(struct udevice *dev, const struct rtc_time *tm)
 	buf[i++] = bin2bcd(tm->tm_year % 100);
 
 	/* write register's data */
-	if (dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, sizeof(buf)) < 0)
-		return -1;
+	ret = dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
 
-	return 0;
+	return ret;
 }
 
 static int pcf2127_rtc_get(struct udevice *dev, struct rtc_time *tm)
 {
-	int rel = 0;
+	int ret = 0;
 	uchar buf[10] = { PCF2127_REG_CTRL1 };
 
-	if (dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, 1) < 0)
-		return -1;
-	if (dm_i2c_read(dev, PCF2127_REG_CTRL1, buf, sizeof(buf)) < 0)
-		return -1;
+	ret = dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, 1);
+	if (ret < 0)
+		return ret;
+	ret = dm_i2c_read(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
 
 	if (buf[PCF2127_REG_CTRL3] & 0x04)
 		puts("### Warning: RTC Low Voltage - date/time not reliable\n");
@@ -79,12 +80,13 @@ static int pcf2127_rtc_get(struct udevice *dev, struct rtc_time *tm)
 	      tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
 	      tm->tm_hour, tm->tm_min, tm->tm_sec);
 
-	return rel;
+	return ret;
 }
 
 static int pcf2127_rtc_reset(struct udevice *dev)
 {
 	/*Doing nothing here*/
+
 	return 0;
 }