linux-kernel - [PATCH] irqchip: bcm7120-l2: use of_io_request_and

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Date:	Thu, 18 Jun 2015 16:05:25 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Kevin Cernekee <cernekee@...il.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Cc:	<bcm-kernel-feedback-list@...adcom.com>,
	Brian Norris <computersforpeace@...il.com>,
	Gregory Fong <gregory.0xf0@...il.com>,
	<linux-mips@...ux-mips.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] irqchip: bcm7120-l2: use of_io_request_and_map() to claim iomem

This way, the IO resources will show up in /proc/iomem, and we can make
sure no other drivers are trying to claim these register regions.

Signed-off-by: Brian Norris <computersforpeace@...il.com>
---
 drivers/irqchip/irq-bcm7120-l2.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/irqchip/irq-bcm7120-l2.c b/drivers/irqchip/irq-bcm7120-l2.c
index 3ba5cc780fcb..299d4de2deb5 100644
--- a/drivers/irqchip/irq-bcm7120-l2.c
+++ b/drivers/irqchip/irq-bcm7120-l2.c
@@ -142,10 +142,10 @@ static int __init bcm7120_l2_intc_iomap_7120(struct device_node *dn,
 {
 	int ret;
 
-	data->map_base[0] = of_iomap(dn, 0);
-	if (!data->map_base[0]) {
+	data->map_base[0] = of_io_request_and_map(dn, 0, dn->full_name);
+	if (IS_ERR(data->map_base[0])) {
 		pr_err("unable to map registers\n");
-		return -ENOMEM;
+		return PTR_ERR(data->map_base[0]);
 	}
 
 	data->pair_base[0] = data->map_base[0];
@@ -178,16 +178,17 @@ static int __init bcm7120_l2_intc_iomap_3380(struct device_node *dn,
 
 	for (gc_idx = 0; gc_idx < MAX_WORDS; gc_idx++) {
 		unsigned int map_idx = gc_idx * 2;
-		void __iomem *en = of_iomap(dn, map_idx + 0);
-		void __iomem *stat = of_iomap(dn, map_idx + 1);
-		void __iomem *base = min(en, stat);
+		void __iomem *en, *stat, *base;
+
+		en = of_io_request_and_map(dn, map_idx + 0, "irq-en");
+		stat = of_io_request_and_map(dn, map_idx + 1, "irq-stat");
+		if (IS_ERR(en) || IS_ERR(stat))
+			break;
 
+		base = min(en, stat);
 		data->map_base[map_idx + 0] = en;
 		data->map_base[map_idx + 1] = stat;
 
-		if (!base)
-			break;
-
 		data->pair_base[gc_idx] = base;
 		data->en_offset[gc_idx] = en - base;
 		data->stat_offset[gc_idx] = stat - base;
-- 
1.9.1

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