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path: root/drivers/soc/tegra/pmc.c
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Diffstat (limited to 'drivers/soc/tegra/pmc.c')
-rw-r--r--drivers/soc/tegra/pmc.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 17e7796a832b..9f9c1c677cf4 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -232,6 +232,11 @@ struct tegra_pmc_soc {
const char * const *reset_levels;
unsigned int num_reset_levels;
+ /*
+ * These describe events that can wake the system from sleep (i.e.
+ * LP0 or SC7). Wakeup from other sleep states (such as LP1 or LP2)
+ * are dealt with in the LIC.
+ */
const struct tegra_wake_event *wake_events;
unsigned int num_wake_events;
};
@@ -1855,6 +1860,9 @@ static int tegra_pmc_irq_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int i;
int err = 0;
+ if (WARN_ON(num_irqs > 1))
+ return -EINVAL;
+
for (i = 0; i < soc->num_wake_events; i++) {
const struct tegra_wake_event *event = &soc->wake_events[i];
@@ -1895,6 +1903,11 @@ static int tegra_pmc_irq_alloc(struct irq_domain *domain, unsigned int virq,
}
}
+ /*
+ * For interrupts that don't have associated wake events, assign a
+ * dummy hardware IRQ number. This is used in the ->irq_set_type()
+ * and ->irq_set_wake() callbacks to return early for these IRQs.
+ */
if (i == soc->num_wake_events)
err = irq_domain_set_hwirq_and_chip(domain, virq, ULONG_MAX,
&pmc->irq, pmc);
@@ -1913,6 +1926,10 @@ static int tegra_pmc_irq_set_wake(struct irq_data *data, unsigned int on)
unsigned int offset, bit;
u32 value;
+ /* nothing to do if there's no associated wake event */
+ if (WARN_ON(data->hwirq == ULONG_MAX))
+ return 0;
+
offset = data->hwirq / 32;
bit = data->hwirq % 32;
@@ -1940,6 +1957,7 @@ static int tegra_pmc_irq_set_type(struct irq_data *data, unsigned int type)
struct tegra_pmc *pmc = irq_data_get_irq_chip_data(data);
u32 value;
+ /* nothing to do if there's no associated wake event */
if (data->hwirq == ULONG_MAX)
return 0;