add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/macintosh/windfarm_fcu_controls.c
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@@ -1,9 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Windfarm PowerMac thermal control. FCU fan control
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  *
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  * Copyright 2012 Benjamin Herrenschmidt, IBM Corp.
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- *
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- * Released under the term of the GNU GPL v2.
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  */
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 #undef DEBUG
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@@ -425,25 +424,25 @@
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 		{ "CPU B 2",		"cpu-fan-b-1",		},
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 		{ "CPU B 3",		"cpu-fan-c-1",		},
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 	};
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-	struct device_node *np = NULL, *fcu = pv->i2c->dev.of_node;
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+	struct device_node *np, *fcu = pv->i2c->dev.of_node;
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 	int i;
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 	DBG("Looking up FCU controls in device-tree...\n");
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-	while ((np = of_get_next_child(fcu, np)) != NULL) {
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+	for_each_child_of_node(fcu, np) {
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 		int id, type = -1;
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 		const char *loc;
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 		const char *name;
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 		const u32 *reg;
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-		DBG(" control: %s, type: %s\n", np->name, np->type);
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+		DBG(" control: %pOFn, type: %s\n", np, of_node_get_device_type(np));
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 		/* Detect control type */
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-		if (!strcmp(np->type, "fan-rpm-control") ||
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-		    !strcmp(np->type, "fan-rpm"))
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+		if (of_node_is_type(np, "fan-rpm-control") ||
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+		    of_node_is_type(np, "fan-rpm"))
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 			type = FCU_FAN_RPM;
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-		if (!strcmp(np->type, "fan-pwm-control") ||
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-		    !strcmp(np->type, "fan-pwm"))
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+		if (of_node_is_type(np, "fan-pwm-control") ||
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+		    of_node_is_type(np, "fan-pwm"))
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 			type = FCU_FAN_PWM;
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 		/* Only care about fans for now */
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 		if (type == -1)
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@@ -469,9 +468,7 @@
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 			else
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 				id = ((*reg) - 0x30) / 2;
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 			if (id > 7) {
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-				pr_warning("wf_fcu: Can't parse "
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-				       "fan ID in device-tree for %pOF\n",
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-					   np);
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+				pr_warn("wf_fcu: Can't parse fan ID in device-tree for %pOF\n", np);
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 				break;
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 			}
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 			wf_fcu_add_fan(pv, name, type, id);