提交 34abf697 编写于 作者: T Thierry Reding

soc/tegra: pmc: Add comments clarifying wake events

Add some comments to clarify the purpose of the wake event support
implemented in the PMC driver.
Reviewed-by: NJon Hunter <jonathanh@nvidia.com>
Signed-off-by: NThierry Reding <treding@nvidia.com>
上级 03b3c21c
无相关合并请求
......@@ -241,6 +241,11 @@ 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;
};
......@@ -1906,6 +1911,11 @@ 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);
......@@ -1924,6 +1934,7 @@ 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;
......@@ -1954,6 +1965,7 @@ 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;
......
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