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path: root/drivers/char/hpet.c
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Diffstat (limited to 'drivers/char/hpet.c')
-rw-r--r--drivers/char/hpet.c51
1 files changed, 7 insertions, 44 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 465ad35..1399971 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -731,14 +731,14 @@ static unsigned long hpet_calibrate(struct hpets *hpetp)
int hpet_alloc(struct hpet_data *hdp)
{
- u64 cap, mcfg, hpet_config;
+ u64 cap, mcfg;
struct hpet_dev *devp;
- u32 i, ntimer, irq;
+ u32 i, ntimer;
struct hpets *hpetp;
size_t siz;
struct hpet __iomem *hpet;
static struct hpets *last = NULL;
- unsigned long period, irq_bitmap;
+ unsigned long period;
unsigned long long temp;
/*
@@ -765,47 +765,11 @@ int hpet_alloc(struct hpet_data *hdp)
hpetp->hp_hpet_phys = hdp->hd_phys_address;
hpetp->hp_ntimer = hdp->hd_nirqs;
- hpet = hpetp->hp_hpet;
-
- /* Assign IRQs statically for legacy devices */
- hpetp->hp_dev[0].hd_hdwirq = hdp->hd_irq[0];
- hpetp->hp_dev[1].hd_hdwirq = hdp->hd_irq[1];
-
- /* Assign IRQs dynamically for the others */
- for (i = 2, devp = &hpetp->hp_dev[2]; i < hdp->hd_nirqs; i++, devp++) {
- struct hpet_timer __iomem *timer;
- timer = &hpet->hpet_timers[devp - hpetp->hp_dev];
+ for (i = 0; i < hdp->hd_nirqs; i++)
+ hpetp->hp_dev[i].hd_hdwirq = hdp->hd_irq[i];
- /* Check if there's already an IRQ assigned to the timer */
- if (hdp->hd_irq[i]) {
- hpetp->hp_dev[i].hd_hdwirq = hdp->hd_irq[i];
- continue;
- }
-
- hpet_config = readq(&timer->hpet_config);
- irq_bitmap = (hpet_config & Tn_INT_ROUTE_CAP_MASK)
- >> Tn_INT_ROUTE_CAP_SHIFT;
- if (!irq_bitmap)
- irq = 0; /* No valid IRQ Assignable */
- else {
- irq = find_first_bit(&irq_bitmap, 32);
- do {
- hpet_config |= irq << Tn_INT_ROUTE_CNF_SHIFT;
- writeq(hpet_config, &timer->hpet_config);
-
- /*
- * Verify whether we have written a valid
- * IRQ number by reading it back again
- */
- hpet_config = readq(&timer->hpet_config);
- if (irq == (hpet_config & Tn_INT_ROUTE_CNF_MASK)
- >> Tn_INT_ROUTE_CNF_SHIFT)
- break; /* Success */
- } while ((irq = (find_next_bit(&irq_bitmap, 32, irq))));
- }
- hpetp->hp_dev[i].hd_hdwirq = irq;
- }
+ hpet = hpetp->hp_hpet;
cap = readq(&hpet->hpet_cap);
@@ -836,8 +800,7 @@ int hpet_alloc(struct hpet_data *hdp)
hpetp->hp_which, hdp->hd_phys_address,
hpetp->hp_ntimer > 1 ? "s" : "");
for (i = 0; i < hpetp->hp_ntimer; i++)
- printk("%s %d", i > 0 ? "," : "",
- hpetp->hp_dev[i].hd_hdwirq);
+ printk("%s %d", i > 0 ? "," : "", hdp->hd_irq[i]);
printk("\n");
printk(KERN_INFO "hpet%u: %u %d-bit timers, %Lu Hz\n",
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