change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/drivers/clk/imx/clk-composite-8m.c
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@@ -97,7 +97,7 @@
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 	int prediv_value;
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 	int div_value;
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 	int ret;
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-	u32 val;
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+	u32 orig, val;
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 	ret = imx8m_clk_composite_compute_dividers(rate, parent_rate,
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 						&prediv_value, &div_value);
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@@ -106,13 +106,15 @@
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 	spin_lock_irqsave(divider->lock, flags);
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-	val = readl(divider->reg);
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-	val &= ~((clk_div_mask(divider->width) << divider->shift) |
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-			(clk_div_mask(PCG_DIV_WIDTH) << PCG_DIV_SHIFT));
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+	orig = readl(divider->reg);
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+	val = orig & ~((clk_div_mask(divider->width) << divider->shift) |
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+		       (clk_div_mask(PCG_DIV_WIDTH) << PCG_DIV_SHIFT));
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 	val |= (u32)(prediv_value  - 1) << divider->shift;
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 	val |= (u32)(div_value - 1) << PCG_DIV_SHIFT;
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-	writel(val, divider->reg);
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+
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+	if (val != orig)
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+		writel(val, divider->reg);
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 	spin_unlock_irqrestore(divider->lock, flags);
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