add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/kernel/legacy_serial.c
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@@ -192,7 +192,7 @@
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 	/* Add port, irq will be dealt with later. We passed a translated
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 	 * IO port value. It will be fixed up later along with the irq
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 	 */
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-	if (tsi && !strcmp(tsi->type, "tsi-bridge"))
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+	if (of_node_is_type(tsi, "tsi-bridge"))
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 		return add_legacy_port(np, -1, UPIO_TSI, addr, addr,
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 				       0, legacy_port_flags, 0);
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 	else
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@@ -400,8 +400,7 @@
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 	/* Next, fill our array with ISA ports */
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 	for_each_node_by_type(np, "serial") {
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 		struct device_node *isa = of_get_parent(np);
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-		if (isa && (!strcmp(isa->name, "isa") ||
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-			    !strcmp(isa->name, "lpc"))) {
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+		if (of_node_name_eq(isa, "isa") || of_node_name_eq(isa, "lpc")) {
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 			if (of_device_is_available(np)) {
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 				index = add_legacy_isa_port(np, isa);
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 				if (index >= 0 && np == stdout)
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@@ -415,11 +414,12 @@
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 	/* Next, try to locate PCI ports */
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 	for (np = NULL; (np = of_find_all_nodes(np));) {
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 		struct device_node *pci, *parent = of_get_parent(np);
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-		if (parent && !strcmp(parent->name, "isa")) {
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+		if (of_node_name_eq(parent, "isa")) {
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 			of_node_put(parent);
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 			continue;
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 		}
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-		if (strcmp(np->name, "serial") && strcmp(np->type, "serial")) {
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+		if (!of_node_name_eq(np, "serial") &&
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+		    !of_node_is_type(np, "serial")) {
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 			of_node_put(parent);
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 			continue;
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 		}
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@@ -479,8 +479,10 @@
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 	port->irq = virq;
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 #ifdef CONFIG_SERIAL_8250_FSL
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-	if (of_device_is_compatible(np, "fsl,ns16550"))
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+	if (of_device_is_compatible(np, "fsl,ns16550")) {
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 		port->handle_irq = fsl8250_handle_irq;
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+		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
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+	}
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 #endif
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 }
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