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authoroftedal <oftedal@gmail.com>2011-06-01 11:11:41 +0000
committerDavid S. Miller <davem@davemloft.net>2011-06-07 16:06:33 -0700
commit9eeb08986f41c0740306f6f56cf04e619e2fe525 (patch)
tree37b20e6c13d839f86aa6294bcd888ea4a8667b3e /arch/sparc
parentea160584574e345495e75ee4a7d3a7dbcad9e16c (diff)
downloadlinux-9eeb08986f41c0740306f6f56cf04e619e2fe525.tar.bz2
Add support for allocating irqs for bootbus devices
Some devices that can generate interrupts are connected directly to the CPU through the bootbus on sun4d. This patch allows IRQs to be allocated for such devices. The information used for allocating interrupts for sbus devices are present at the corresponding SBI node. For bootbus devices this information is present in the bootbus node. Signed-off-by: Kjetil Oftedal <oftedal@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/sun4d_irq.c34
1 files changed, 22 insertions, 12 deletions
diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c
index eaec8a90fb9f..1d13c5bda0b1 100644
--- a/arch/sparc/kernel/sun4d_irq.c
+++ b/arch/sparc/kernel/sun4d_irq.c
@@ -334,7 +334,8 @@ unsigned int sun4d_build_device_irq(struct platform_device *op,
unsigned int real_irq)
{
struct device_node *dp = op->dev.of_node;
- struct device_node *io_unit, *sbi = dp->parent;
+ struct device_node *board_parent, *bus = dp->parent;
+ char *bus_connection;
const struct linux_prom_registers *regs;
unsigned int pil;
unsigned int irq;
@@ -342,13 +343,20 @@ unsigned int sun4d_build_device_irq(struct platform_device *op,
int sbusl;
irq = real_irq;
- while (sbi) {
- if (!strcmp(sbi->name, "sbi"))
+ while (bus) {
+ if (!strcmp(bus->name, "sbi")) {
+ bus_connection = "io-unit";
break;
+ }
+
+ if (!strcmp(bus->name, "bootbus")) {
+ bus_connection = "cpu-unit";
+ break;
+ }
- sbi = sbi->parent;
+ bus = bus->parent;
}
- if (!sbi)
+ if (!bus)
goto err_out;
regs = of_get_property(dp, "reg", NULL);
@@ -358,17 +366,19 @@ unsigned int sun4d_build_device_irq(struct platform_device *op,
slot = regs->which_io;
/*
- * If SBI's parent is not io-unit or the io-unit lacks
- * a "board#" property, something is very wrong.
+ * If Bus nodes parent is not io-unit/cpu-unit or the io-unit/cpu-unit
+ * lacks a "board#" property, something is very wrong.
*/
- if (!sbi->parent || strcmp(sbi->parent->name, "io-unit")) {
- printk("%s: Error, parent is not io-unit.\n", sbi->full_name);
+ if (!bus->parent || strcmp(bus->parent->name, bus_connection)) {
+ printk(KERN_ERR "%s: Error, parent is not %s.\n",
+ bus->full_name, bus_connection);
goto err_out;
}
- io_unit = sbi->parent;
- board = of_getintprop_default(io_unit, "board#", -1);
+ board_parent = bus->parent;
+ board = of_getintprop_default(board_parent, "board#", -1);
if (board == -1) {
- printk("%s: Error, lacks board# property.\n", io_unit->full_name);
+ printk(KERN_ERR "%s: Error, lacks board# property.\n",
+ board_parent->full_name);
goto err_out;
}