rtc: ma35d1: remove hardcoded UIE support

Let the core handle UIE instead of enabling it forcefully at probe which
means the RTC will generate an interrupt every second even when nobody
cares.

Link: https://lore.kernel.org/r/20231217225831.48581-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: alexandrebelloni

drivers/rtc/rtc-ma35d1.c

@@ -79,11 +79,6 @@ static irqreturn_t ma35d1_rtc_interrupt(int irq, void *data)
 		events |= RTC_AF | RTC_IRQF;
 	}
 
-	if (rtc_irq & RTC_INTSTS_UIF) {
-		rtc_reg_write(rtc, MA35_REG_RTC_INTSTS, RTC_INTSTS_UIF);
-		events |= RTC_UF | RTC_IRQF;
-	}
-
 	rtc_update_irq(rtc->rtcdev, 1, events);
 
 	return IRQ_HANDLED;
@@ -216,7 +211,6 @@ static int ma35d1_rtc_probe(struct platform_device *pdev)
 {
 	struct ma35_rtc *rtc;
 	struct clk *clk;
-	u32 regval;
 	int ret;
 
 	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
@@ -264,40 +258,26 @@ static int ma35d1_rtc_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(&pdev->dev, ret, "Failed to register rtc device\n");
 
-	regval = rtc_reg_read(rtc, MA35_REG_RTC_INTEN);
-	regval |= RTC_INTEN_UIEN;
-	rtc_reg_write(rtc, MA35_REG_RTC_INTEN, regval);
-
 	return 0;
 }
 
 static int ma35d1_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 {
 	struct ma35_rtc *rtc = platform_get_drvdata(pdev);
-	u32 regval;
 
 	if (device_may_wakeup(&pdev->dev))
 		enable_irq_wake(rtc->irq_num);
 
-	regval = rtc_reg_read(rtc, MA35_REG_RTC_INTEN);
-	regval &= ~RTC_INTEN_UIEN;
-	rtc_reg_write(rtc, MA35_REG_RTC_INTEN, regval);
-
 	return 0;
 }
 
 static int ma35d1_rtc_resume(struct platform_device *pdev)
 {
 	struct ma35_rtc *rtc = platform_get_drvdata(pdev);
-	u32 regval;
 
 	if (device_may_wakeup(&pdev->dev))
 		disable_irq_wake(rtc->irq_num);
 
-	regval = rtc_reg_read(rtc, MA35_REG_RTC_INTEN);
-	regval |= RTC_INTEN_UIEN;
-	rtc_reg_write(rtc, MA35_REG_RTC_INTEN, regval);
-
 	return 0;
 }