From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 18 Jan 2011 14:43:44 +0000 (+0000)
Subject: mpc85xx: disable the i8259 irq on mpc8548cds (but leave the controller initialized... 
X-Git-Tag: reboot~17856
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a30322060530e2831ba08c6187931e5347096f3b;p=openwrt%2Fstaging%2Fchunkeey.git

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
---

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 0000000000..4d585100e6
--- /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 0000000000..54a27858f3
--- /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 {