[PATCH 1/3] rtc: pcf8523: switch to devm_rtc_allocate_device

[PATCH 1/3] rtc: pcf8523: switch to devm_rtc_allocate_device

[Alexandre Belloni]

Switch to devm_rtc_allocate_device/devm_rtc_register_device, this allows
for further improvement of the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/rtc/rtc-pcf8523.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 57d351dfe272..b525998cd70e 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -356,12 +356,13 @@ static int pcf8523_probe(struct i2c_client *client,
 	if (err < 0)
 		return err;
 
-	rtc = devm_rtc_device_register(&client->dev, DRIVER_NAME,
-				       &pcf8523_rtc_ops, THIS_MODULE);
+	rtc = devm_rtc_allocate_device(&client->dev);
 	if (IS_ERR(rtc))
 		return PTR_ERR(rtc);
 
-	return 0;
+	rtc->ops = &pcf8523_rtc_ops;
+
+	return devm_rtc_register_device(rtc);
 }
 
 static const struct i2c_device_id pcf8523_id[] = {
-- 
2.28.0

[PATCH 2/3] rtc: pcf8523: set range

[Alexandre Belloni]

Set the th RTC range, it is a classic BCD RTC, considering 00 as a leap
year. Let the core handle range checking.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/rtc/rtc-pcf8523.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index b525998cd70e..d5f913cb2ec9 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -226,17 +226,6 @@ static int pcf8523_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	u8 regs[8];
 	int err;
 
-	/*
-	 * The hardware can only store values between 0 and 99 in it's YEAR
-	 * register (with 99 overflowing to 0 on increment).
-	 * After 2100-02-28 we could start interpreting the year to be in the
-	 * interval [2100, 2199], but there is no path to switch in a smooth way
-	 * because the chip handles YEAR=0x00 (and the out-of-spec
-	 * YEAR=0xa0) as a leap year, but 2100 isn't.
-	 */
-	if (tm->tm_year < 100 || tm->tm_year >= 200)
-		return -EINVAL;
-
 	err = pcf8523_stop_rtc(client);
 	if (err < 0)
 		return err;
@@ -361,6 +350,8 @@ static int pcf8523_probe(struct i2c_client *client,
 		return PTR_ERR(rtc);
 
 	rtc->ops = &pcf8523_rtc_ops;
+	rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+	rtc->range_max = RTC_TIMESTAMP_END_2099;
 
 	return devm_rtc_register_device(rtc);
 }
-- 
2.28.0

[PATCH 3/3] rtc: pcf8523: use BIT

[Alexandre Belloni]

Use the BIT macro to define register bits.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/rtc/rtc-pcf8523.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index d5f913cb2ec9..5e1e7b2a8c9a 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -12,18 +12,18 @@
 #define DRIVER_NAME "rtc-pcf8523"
 
 #define REG_CONTROL1 0x00
-#define REG_CONTROL1_CAP_SEL (1 << 7)
-#define REG_CONTROL1_STOP    (1 << 5)
+#define REG_CONTROL1_CAP_SEL BIT(7)
+#define REG_CONTROL1_STOP    BIT(5)
 
 #define REG_CONTROL3 0x02
-#define REG_CONTROL3_PM_BLD (1 << 7) /* battery low detection disabled */
-#define REG_CONTROL3_PM_VDD (1 << 6) /* switch-over disabled */
-#define REG_CONTROL3_PM_DSM (1 << 5) /* direct switching mode */
+#define REG_CONTROL3_PM_BLD BIT(7) /* battery low detection disabled */
+#define REG_CONTROL3_PM_VDD BIT(6) /* switch-over disabled */
+#define REG_CONTROL3_PM_DSM BIT(5) /* direct switching mode */
 #define REG_CONTROL3_PM_MASK 0xe0
-#define REG_CONTROL3_BLF (1 << 2) /* battery low bit, read-only */
+#define REG_CONTROL3_BLF BIT(2) /* battery low bit, read-only */
 
 #define REG_SECONDS  0x03
-#define REG_SECONDS_OS (1 << 7)
+#define REG_SECONDS_OS BIT(7)
 
 #define REG_MINUTES  0x04
 #define REG_HOURS    0x05
-- 
2.28.0