add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rtc/rtc-st-lpc.c
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@@ -228,7 +228,7 @@
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 	enable_irq_wake(rtc->irq);
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 	disable_irq(rtc->irq);
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-	rtc->clk = clk_get(&pdev->dev, NULL);
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+	rtc->clk = devm_clk_get(&pdev->dev, NULL);
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 	if (IS_ERR(rtc->clk)) {
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 		dev_err(&pdev->dev, "Unable to request clock\n");
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 		return PTR_ERR(rtc->clk);
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@@ -238,6 +238,7 @@
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 	rtc->clkrate = clk_get_rate(rtc->clk);
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 	if (!rtc->clkrate) {
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+		clk_disable_unprepare(rtc->clk);
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 		dev_err(&pdev->dev, "Unable to fetch clock rate\n");
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 		return -EINVAL;
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 	}