add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/base/power/clock_ops.c
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@@ -1,9 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * drivers/base/power/clock_ops.c - Generic clock manipulation PM callbacks
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  *
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  * Copyright (c) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
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- *
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- * This file is released under the GPLv2.
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  */
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 #include <linux/kernel.h>
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@@ -13,6 +12,7 @@
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 #include <linux/pm_clock.h>
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 #include <linux/clk.h>
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 #include <linux/clkdev.h>
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+#include <linux/of_clk.h>
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 #include <linux/slab.h>
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 #include <linux/err.h>
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 #include <linux/pm_domain.h>
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@@ -65,10 +65,15 @@
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 	if (IS_ERR(ce->clk)) {
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 		ce->status = PCE_STATUS_ERROR;
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 	} else {
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-		clk_prepare(ce->clk);
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-		ce->status = PCE_STATUS_ACQUIRED;
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-		dev_dbg(dev, "Clock %pC con_id %s managed by runtime PM.\n",
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-			ce->clk, ce->con_id);
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+		if (clk_prepare(ce->clk)) {
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+			ce->status = PCE_STATUS_ERROR;
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+			dev_err(dev, "clk_prepare() failed\n");
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+		} else {
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+			ce->status = PCE_STATUS_ACQUIRED;
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+			dev_dbg(dev,
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+				"Clock %pC con_id %s managed by runtime PM.\n",
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+				ce->clk, ce->con_id);
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+		}
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 	}
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 }
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@@ -88,8 +93,6 @@
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 	if (con_id) {
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 		ce->con_id = kstrdup(con_id, GFP_KERNEL);
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 		if (!ce->con_id) {
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-			dev_err(dev,
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-				"Not enough memory for clock connection ID.\n");
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 			kfree(ce);
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 			return -ENOMEM;
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 		}
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@@ -191,8 +194,7 @@
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 	if (!dev || !dev->of_node)
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 		return -EINVAL;
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-	count = of_count_phandle_with_args(dev->of_node, "clocks",
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-					   "#clock-cells");
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+	count = of_clk_get_parent_count(dev->of_node);
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 	if (count <= 0)
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 		return -ENODEV;
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