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Commit 34abf697 authored by Thierry Reding's avatar Thierry Reding
Browse files

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: default avatarJon Hunter <jonathanh@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 03b3c21c

drivers/soc/tegra/pmc.c

+12 −0
Original line number Diff line number Diff line
@@ -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;