Merge tag 'rtc-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC updates from Alexandre Belloni:
 "Subsystem wide cleanups:
   - Use IS_ENABLED() instead of checking for built-in or module
   - remove useless DRV_VERSION
   - remove CLK_IS_ROOT
   - remove UIE signaling

  Drivers:
   - ds1302: rewritten to be a proper SPI device driver
   - m41t80: huge cleanup, alarm, wakelarm ans oscialltor failure
     detection support
   - rv3029: switch to regmap to handle rv3049, alarm support, fixes
   - zynqmp: enable switching to battery power, fixes
   - small fixes for at91sam9, da9053, ds1307, ds1685, ds3232, r2025,
     sa1100, snvs, stmp3xxx, tps6586x"

* tag 'rtc-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (40 commits)
  rtc: tps6586x: rename so module can be autoloaded
  rtc: rv3029: hide unused i2c device table
  rtc: rs5c372: r2025: fix check for 'oscillator halted' condition
  rtc: rv3029: add alarm IRQ
  rtc: rv3029: fix set_time function
  rtc: rv3029: fix alarm support
  rtc: rv3029: Remove some checks and warnings
  rtc: rv3029: Add support of RV3049
  rtc: rv3029: convert to use regmap
  rtc: rv3029: remove 'i2c' in functions names
  rtc: stmp3xxx: print message on error
  rtc: Use IS_ENABLED() instead of checking for built-in or module
  rtc: ds3232: fix call trace when rtc->ops_lock is used as NULL
  rtc: snvs: return error in case enable_irq_wake fails
  rtc: zynqmp: Update seconds time programming logic
  rtc: sa1100: DT spelling s/interrupt-name/interrupt-names/
  rtc: mc13xxx: remove UIE signaling
  rtc: mxc: remove UIE signaling
  rtc: ds1307: Remove CLK_IS_ROOT
  rtc: hym8563: Remove CLK_IS_ROOT
  ...

1 files changed, 14 insertions, 9 deletions

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index ecb7dbae9be9..821d9c089cdb 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -275,9 +275,13 @@ static s32 ds1307_native_smbus_write_block_data(const struct i2c_client *client,
 {
 	u8 suboffset = 0;
 
-	if (length <= I2C_SMBUS_BLOCK_MAX)
-		return i2c_smbus_write_i2c_block_data(client,
+	if (length <= I2C_SMBUS_BLOCK_MAX) {
+		s32 retval = i2c_smbus_write_i2c_block_data(client,
 					command, length, values);
+		if (retval < 0)
+			return retval;
+		return length;
+	}
 
 	while (suboffset < length) {
 		s32 retval = i2c_smbus_write_i2c_block_data(client,
@@ -538,12 +542,8 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
 	buf[5] = 0;
 	buf[6] = 0;
 
-	/* optionally enable ALARM1 */
+	/* disable alarms */
 	buf[7] = control & ~(DS1337_BIT_A1IE | DS1337_BIT_A2IE);
-	if (t->enabled) {
-		dev_dbg(dev, "alarm IRQ armed\n");
-		buf[7] |= DS1337_BIT_A1IE;	/* only ALARM1 is used */
-	}
 	buf[8] = status & ~(DS1337_BIT_A1I | DS1337_BIT_A2I);
 
 	ret = ds1307->write_block_data(client,
@@ -553,6 +553,13 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
 		return ret;
 	}
 
+	/* optionally enable ALARM1 */
+	if (t->enabled) {
+		dev_dbg(dev, "alarm IRQ armed\n");
+		buf[7] |= DS1337_BIT_A1IE;	/* only ALARM1 is used */
+		i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, buf[7]);
+	}
+
 	return 0;
 }
 
@@ -1144,12 +1151,10 @@ static struct clk_init_data ds3231_clks_init[] = {
 	[DS3231_CLK_SQW] = {
 		.name = "ds3231_clk_sqw",
 		.ops = &ds3231_clk_sqw_ops,
-		.flags = CLK_IS_ROOT,
 	},
 	[DS3231_CLK_32KHZ] = {
 		.name = "ds3231_clk_32khz",
 		.ops = &ds3231_clk_32khz_ops,
-		.flags = CLK_IS_ROOT,
 	},
 };