add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rtc/rtc-pm8xxx.c
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@@ -219,7 +219,6 @@
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 {
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 	int rc, i;
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 	u8 value[NUM_8_BIT_RTC_REGS];
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-	unsigned int ctrl_reg;
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 	unsigned long secs, irq_flags;
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 	struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
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 	const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
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@@ -231,6 +230,11 @@
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 		secs >>= 8;
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 	}
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+	rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
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+				regs->alarm_en, 0);
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+	if (rc)
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+		return rc;
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+
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 	spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
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 	rc = regmap_bulk_write(rtc_dd->regmap, regs->alarm_rw, value,
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@@ -240,19 +244,11 @@
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 		goto rtc_rw_fail;
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 	}
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-	rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
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-	if (rc)
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-		goto rtc_rw_fail;
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-
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-	if (alarm->enabled)
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-		ctrl_reg |= regs->alarm_en;
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-	else
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-		ctrl_reg &= ~regs->alarm_en;
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-
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-	rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg);
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-	if (rc) {
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-		dev_err(dev, "Write to RTC alarm control register failed\n");
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-		goto rtc_rw_fail;
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+	if (alarm->enabled) {
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+		rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
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+					regs->alarm_en, regs->alarm_en);
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+		if (rc)
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+			goto rtc_rw_fail;
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 	}
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 	dev_dbg(dev, "Alarm Set for h:m:s=%ptRt, y-m-d=%ptRdr\n",