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authorFelix Fietkau <nbd@openwrt.org>2011-01-18 14:43:44 +0000
committerFelix Fietkau <nbd@openwrt.org>2011-01-18 14:43:44 +0000
commita30322060530e2831ba08c6187931e5347096f3b (patch)
tree3074ff2be81baaee9e02f611b877105c9e1ef213
parent100211927c45e788da517322d7798182b2a1e68b (diff)
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mpc85xx: disable the i8259 irq on mpc8548cds (but leave the controller initialized) - it shares an irq with the pcie device which causes irq storms
SVN-Revision: 25037
-rw-r--r--target/linux/mpc85xx/patches/120-mpc8548_cds_i8259_noirq_init.patch23
-rw-r--r--target/linux/mpc85xx/patches/130-mpc8548_cds_disable_i8259_irq.patch13
2 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/mpc85xx/patches/120-mpc8548_cds_i8259_noirq_init.patch b/target/linux/mpc85xx/patches/120-mpc8548_cds_i8259_noirq_init.patch
new file mode 100644
index 0000000..4d58510
--- /dev/null
+++ b/target/linux/mpc85xx/patches/120-mpc8548_cds_i8259_noirq_init.patch
@@ -0,0 +1,23 @@
+--- a/arch/powerpc/platforms/85xx/mpc85xx_cds.c
++++ b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
+@@ -234,15 +234,16 @@ static int mpc85xx_cds_8259_attach(void)
+ return -ENODEV;
+ }
+
++ i8259_init(cascade_node, 0);
++ of_node_put(cascade_node);
++
+ cascade_irq = irq_of_parse_and_map(cascade_node, 0);
+ if (cascade_irq == NO_IRQ) {
+- printk(KERN_ERR "Failed to map cascade interrupt\n");
++ of_node_put(cascade_node);
++ printk(KERN_DEBUG "No interrupt for i8259 PIC\n");
+ return -ENXIO;
+ }
+
+- i8259_init(cascade_node, 0);
+- of_node_put(cascade_node);
+-
+ /*
+ * Hook the interrupt to make sure desc->action is never NULL.
+ * This is required to ensure that the interrupt does not get
diff --git a/target/linux/mpc85xx/patches/130-mpc8548_cds_disable_i8259_irq.patch b/target/linux/mpc85xx/patches/130-mpc8548_cds_disable_i8259_irq.patch
new file mode 100644
index 0000000..54a2785
--- /dev/null
+++ b/target/linux/mpc85xx/patches/130-mpc8548_cds_disable_i8259_irq.patch
@@ -0,0 +1,13 @@
+--- a/arch/powerpc/boot/dts/mpc8548cds.dts
++++ b/arch/powerpc/boot/dts/mpc8548cds.dts
+@@ -492,8 +492,10 @@
+ #address-cells = <0>;
+ #interrupt-cells = <2>;
+ compatible = "chrp,iic";
++/*
+ interrupts = <0 1>;
+ interrupt-parent = <&mpic>;
++*/
+ };
+
+ rtc@70 {