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Provide a fix for certain PowerMacs where the U3 i2c lacks the interrupt

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Tested by:	Robert Hish
MFC after:	1 week
This commit is contained in:
Andreas Tobler 2012-03-19 18:03:20 +00:00
parent cd283487cc
commit 43cbf1a696
1 changed files with 30 additions and 1 deletions
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31
sys/powerpc/powermac/uninorth.c
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@ -262,9 +262,11 @@ unin_chip_attach(device_t dev)
struct unin_chip_devinfo *dinfo;
phandle_t root;
phandle_t child;
phandle_t iparent;
device_t cdev;
char compat[32];
u_int reg[3];
char name[32];
u_int irq, reg[3];
int error, i = 0;
sc = device_get_softc(dev);
@ -315,6 +317,33 @@ unin_chip_attach(device_t dev)
dinfo->udi_ninterrupts = 0;
unin_chip_add_intr(child, dinfo);
/*
* Some Apple machines do have a bug in OF, they miss
* the interrupt entries on the U3 I2C node. That means they
* do not have an entry with number of interrupts nor the
* entry of the interrupt parent handle.
* We define an interrupt and hardwire it to the /u3/mpic
* handle.
*/
if (OF_getprop(child, "name", name, sizeof(name)) <= 0)
device_printf(dev, "device has no name!\n");
if (dinfo->udi_ninterrupts == 0 &&
(strcmp(name, "i2c-bus") == 0 ||
strcmp(name, "i2c") == 0)) {
if (OF_getprop(child, "interrupt-parent", &iparent,
sizeof(iparent)) <= 0) {
iparent = OF_finddevice("/u3/mpic");
device_printf(dev, "Set /u3/mpic as iparent!\n");
}
/* Add an interrupt number 0 to the parent. */
irq = MAP_IRQ(iparent, 0);
resource_list_add(&dinfo->udi_resources, SYS_RES_IRQ,
dinfo->udi_ninterrupts, irq, irq, 1);
dinfo->udi_interrupts[dinfo->udi_ninterrupts] = irq;
dinfo->udi_ninterrupts++;
}
unin_chip_add_reg(child, dinfo);
cdev = device_add_child(dev, NULL, -1);