add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/clk/clk.c
..
..
@@ -253,6 +253,17 @@
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 		}
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 	}
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+	/*
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+	 * This could be called with the enable lock held, or from atomic
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+	 * context. If the parent isn't enabled already, we can't do
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+	 * anything here. We can also assume this clock isn't enabled.
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+	 */
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+	if ((core->flags & CLK_OPS_PARENT_ENABLE) && core->parent)
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+		if (!clk_core_is_enabled(core->parent)) {
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+			ret = false;
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+			goto done;
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+		}
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+
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 	ret = core->ops->is_enabled(core->hw);
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 done:
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 	if (core->rpm_enabled)