linux-kernel - [PATCH 4/6] mfd: Use interrupt-parent as IRQ controller if specified in DT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1344250002-6011-5-git-send-email-lee.jones@linaro.org>
Date:	Mon,  6 Aug 2012 11:46:40 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	STEricsson_nomadik_linux@...t.st.com, linus.walleij@...ricsson.com,
	arnd@...db.de, dmitry.torokhov@...il.com, sameo@...ux.intel.com,
	Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 4/6] mfd: Use interrupt-parent as IRQ controller if specified in DT

Without this patch the default behaviour is to climb the Device
Tree and use the first encountered interrupt controller. This
does not take into account if a device node has specified to use
a particular IRQ controller using the interrupt-parent property.
This patch ensures that property is adhered to.

Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/mfd/mfd-core.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 0c3a01c..f10f27b 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/irqdomain.h>
 #include <linux/of.h>
+#include <linux/of_irq.h>
 
 int mfd_cell_enable(struct platform_device *pdev)
 {
@@ -78,7 +79,7 @@ static int mfd_add_device(struct device *parent, int id,
 {
 	struct resource *res;
 	struct platform_device *pdev;
-	struct device_node *np = NULL;
+	struct device_node *np, *parent_node = NULL;
 	struct irq_domain *domain = NULL;
 	int ret = -ENOMEM;
 	int r;
@@ -97,7 +98,12 @@ static int mfd_add_device(struct device *parent, int id,
 		for_each_child_of_node(parent->of_node, np) {
 			if (of_device_is_compatible(np, cell->of_compatible)) {
 				pdev->dev.of_node = np;
-				domain = irq_find_host(parent->of_node);
+#ifdef CONFIG_OF
+				parent_node = of_irq_find_parent(np);
+#endif
+				if (!parent_node)
+					parent_node = parent->of_node;
+				domain = irq_find_host(parent_node);
 				break;
 			}
 		}
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/