[PATCH V3] rtc: rtc-pcf2123: replace strict_strtoul() with kstrtoul()

[Jingoo Han <jg1.han@samsung.com>]

The usage of strict_strtoul() is not preferred, because
strict_strtoul() is obsolete. Thus, kstrtoul() should be
used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
Changes since v1:
- Splitted to two sequential checks.
- Added Andy Shevchenko's Reviewed-by.

Changes since v1:
- Used return code from kstrtoul().

 drivers/rtc/rtc-pcf2123.c |   15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index b2a78a0..1725b50 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -94,8 +94,9 @@ static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr,
 
 	r = container_of(attr, struct pcf2123_sysfs_reg, attr);
 
-	if (strict_strtoul(r->name, 16, &reg))
-		return -EINVAL;
+	ret = kstrtoul(r->name, 16, &reg);
+	if (ret)
+		return ret;
 
 	txbuf[0] = PCF2123_READ | reg;
 	ret = spi_write_then_read(spi, txbuf, 1, rxbuf, 1);
@@ -117,9 +118,13 @@ static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr,
 
 	r = container_of(attr, struct pcf2123_sysfs_reg, attr);
 
-	if (strict_strtoul(r->name, 16, &reg)
-		|| strict_strtoul(buffer, 10, &val))
-		return -EINVAL;
+	ret = kstrtoul(r->name, 16, &reg);
+	if (ret)
+		return ret;
+
+	ret = kstrtoul(buffer, 10, &val);
+	if (ret)
+		return ret;
 
 	txbuf[0] = PCF2123_WRITE | reg;
 	txbuf[1] = val;
-- 
1.7.10.4