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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/drivers/irqchip/irq-vic.c
....@@ -1,22 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *  linux/arch/arm/common/vic.c
34  *
45  *  Copyright (C) 1999 - 2003 ARM Limited
56  *  Copyright (C) 2000 Deep Blue Solutions Ltd
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
207  */
218 
229 #include <linux/export.h>
....@@ -40,7 +27,10 @@
4027 
4128 #define VIC_IRQ_STATUS			0x00
4229 #define VIC_FIQ_STATUS			0x04
30
+#define VIC_RAW_STATUS			0x08
4331 #define VIC_INT_SELECT			0x0c	/* 1 = FIQ, 0 = IRQ */
32
+#define VIC_INT_ENABLE			0x10	/* 1 = enable, 0 = disable */
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+#define VIC_INT_ENABLE_CLEAR		0x14
4434 #define VIC_INT_SOFT			0x18
4535 #define VIC_INT_SOFT_CLEAR		0x1c
4636 #define VIC_PROTECT			0x20
....@@ -173,7 +163,7 @@
173163 };
174164 
175165 /**
176
- * vic_pm_init - initicall to register VIC pm
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+ * vic_pm_init - initcall to register VIC pm
177167  *
178168  * This is called via late_initcall() to register
179169  * the resources for the VICs due to the early
....@@ -407,7 +397,7 @@
407397 /*
408398  * The PL190 cell from ARM has been modified by ST to handle 64 interrupts.
409399  * The original cell has 32 interrupts, while the modified one has 64,
410
- * replocating two blocks 0x00..0x1f in 0x20..0x3f. In that case
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+ * replicating two blocks 0x00..0x1f in 0x20..0x3f. In that case
411401  * the probe function is called twice, with base set to offset 000
412402  *  and 020 within the page. We call this "second block".
413403  */
....@@ -441,7 +431,7 @@
441431 	vic_register(base, 0, irq_start, vic_sources, 0, node);
442432 }
443433 
444
-void __init __vic_init(void __iomem *base, int parent_irq, int irq_start,
434
+static void __init __vic_init(void __iomem *base, int parent_irq, int irq_start,
445435 			      u32 vic_sources, u32 resume_sources,
446436 			      struct device_node *node)
447437 {
....@@ -465,7 +455,7 @@
465455 		return;
466456 	default:
467457 		printk(KERN_WARNING "VIC: unknown vendor, continuing anyways\n");
468
-		/* fall through */
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+		fallthrough;
469459 	case AMBA_VENDOR_ARM:
470460 		break;
471461 	}
....@@ -494,27 +484,6 @@
494484 	__vic_init(base, 0, irq_start, vic_sources, resume_sources, NULL);
495485 }
496486 
497
-/**
498
- * vic_init_cascaded() - initialise a cascaded vectored interrupt controller
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- * @base: iomem base address
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- * @parent_irq: the parent IRQ we're cascaded off
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- * @vic_sources: bitmask of interrupt sources to allow
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- * @resume_sources: bitmask of interrupt sources to allow for resume
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- *
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- * This returns the base for the new interrupts or negative on error.
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- */
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-int __init vic_init_cascaded(void __iomem *base, unsigned int parent_irq,
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-			      u32 vic_sources, u32 resume_sources)
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-{
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-	struct vic_device *v;
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-
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-	v = &vic_devices[vic_id];
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-	__vic_init(base, parent_irq, 0, vic_sources, resume_sources, NULL);
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-	/* Return out acquired base */
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-	return v->irq;
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-}
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-EXPORT_SYMBOL_GPL(vic_init_cascaded);
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-
518487 #ifdef CONFIG_OF
519488 static int __init vic_of_init(struct device_node *node,
520489 			      struct device_node *parent)
....@@ -522,9 +491,7 @@
522491 	void __iomem *regs;
523492 	u32 interrupt_mask = ~0;
524493 	u32 wakeup_mask = ~0;
525
-
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-	if (WARN(parent, "non-root VICs are not supported"))
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-		return -EINVAL;
494
+	int parent_irq;
528495 
529496 	regs = of_iomap(node, 0);
530497 	if (WARN_ON(!regs))
....@@ -532,11 +499,14 @@
532499 
533500 	of_property_read_u32(node, "valid-mask", &interrupt_mask);
534501 	of_property_read_u32(node, "valid-wakeup-mask", &wakeup_mask);
502
+	parent_irq = of_irq_get(node, 0);
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+	if (parent_irq < 0)
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+		parent_irq = 0;
535505 
536506 	/*
537507 	 * Passing 0 as first IRQ makes the simple domain allocate descriptors
538508 	 */
539
-	__vic_init(regs, 0, 0, interrupt_mask, wakeup_mask, node);
509
+	__vic_init(regs, parent_irq, 0, interrupt_mask, wakeup_mask, node);
540510 
541511 	return 0;
542512 }