Commit 408f110e authored by Marc Zyngier's avatar Marc Zyngier
Browse files

Merge branch 'irq/tegra-pmc' into irq/irqchip-next 



Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parents 04e8c5b2 c351ab7b

drivers/gpio/gpio-tegra186.c

+13 −2
Original line number Diff line number Diff line
@@ -430,7 +430,18 @@ static int tegra186_irq_set_type(struct irq_data *data, unsigned int type) 
	else

		irq_set_handler_locked(data, handle_edge_irq);



	if (data->parent_data)

		return irq_chip_set_type_parent(data, type);



	return 0;

}



static int tegra186_irq_set_wake(struct irq_data *data, unsigned int on)

{

	if (data->parent_data)

		return irq_chip_set_wake_parent(data, on);



	return 0;

}



static void tegra186_gpio_irq(struct irq_desc *desc)
@@ -678,7 +689,7 @@ static int tegra186_gpio_probe(struct platform_device *pdev) 
	gpio->intc.irq_mask = tegra186_irq_mask;

	gpio->intc.irq_unmask = tegra186_irq_unmask;

	gpio->intc.irq_set_type = tegra186_irq_set_type;

	gpio->intc.irq_set_wake = irq_chip_set_wake_parent;

	gpio->intc.irq_set_wake = tegra186_irq_set_wake;



	irq = &gpio->gpio.irq;

	irq->chip = &gpio->intc;

drivers/soc/tegra/pmc.c

+39 −52
Original line number Diff line number Diff line
@@ -1990,44 +1990,17 @@ static int tegra_pmc_irq_alloc(struct irq_domain *domain, unsigned int virq, 
							    event->id,

							    &pmc->irq, pmc);



			/*

			 * GPIOs don't have an equivalent interrupt in the

			 * parent controller (GIC). However some code, such

			 * as the one in irq_get_irqchip_state(), require a

			 * valid IRQ chip to be set. Make sure that's the

			 * case by passing NULL here, which will install a

			 * dummy IRQ chip for the interrupt in the parent

			 * domain.

			 */

			if (domain->parent)

				irq_domain_set_hwirq_and_chip(domain->parent,

							      virq, 0, NULL,

							      NULL);



			/* GPIO hierarchies stop at the PMC level */

			if (!err && domain->parent)

 				err = irq_domain_disconnect_hierarchy(domain->parent,

								      virq);

			break;

		}

	}



	/*

	 * 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);



		/*

		 * Interrupts without a wake event don't have a corresponding

		 * interrupt in the parent controller (GIC). Pass NULL for the

		 * chip here, which causes a dummy IRQ chip to be installed

		 * for the interrupt in the parent domain, to make this

		 * explicit.

		 */

		if (domain->parent)

			irq_domain_set_hwirq_and_chip(domain->parent, virq, 0,

						      NULL, NULL);

	}

	/* If there is no wake-up event, there is no PMC mapping */

	if (i == soc->num_wake_events)

		err = irq_domain_disconnect_hierarchy(domain, virq);



	return err;

}
@@ -2043,9 +2016,6 @@ static int tegra210_pmc_irq_set_wake(struct irq_data *data, unsigned int on) 
	unsigned int offset, bit;

	u32 value;



	if (data->hwirq == ULONG_MAX)

		return 0;



	offset = data->hwirq / 32;

	bit = data->hwirq % 32;
@@ -2080,9 +2050,6 @@ static int tegra210_pmc_irq_set_type(struct irq_data *data, unsigned int type) 
	unsigned int offset, bit;

	u32 value;



	if (data->hwirq == ULONG_MAX)

		return 0;



	offset = data->hwirq / 32;

	bit = data->hwirq % 32;
@@ -2123,10 +2090,6 @@ static int tegra186_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;
@@ -2154,10 +2117,6 @@ static int tegra186_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;



	value = readl(pmc->wake + WAKE_AOWAKE_CNTRL(data->hwirq));



	switch (type) {
@@ -2184,6 +2143,34 @@ static int tegra186_pmc_irq_set_type(struct irq_data *data, unsigned int type) 
	return 0;

}



static void tegra_irq_mask_parent(struct irq_data *data)

{

	if (data->parent_data)

		irq_chip_mask_parent(data);

}



static void tegra_irq_unmask_parent(struct irq_data *data)

{

	if (data->parent_data)

		irq_chip_unmask_parent(data);

}



static void tegra_irq_eoi_parent(struct irq_data *data)

{

	if (data->parent_data)

		irq_chip_eoi_parent(data);

}



static int tegra_irq_set_affinity_parent(struct irq_data *data,

					 const struct cpumask *dest,

					 bool force)

{

	if (data->parent_data)

		return irq_chip_set_affinity_parent(data, dest, force);



	return -EINVAL;

}



static int tegra_pmc_irq_init(struct tegra_pmc *pmc)

{

	struct irq_domain *parent = NULL;
@@ -2199,10 +2186,10 @@ static int tegra_pmc_irq_init(struct tegra_pmc *pmc) 
		return 0;



	pmc->irq.name = dev_name(pmc->dev);

	pmc->irq.irq_mask = irq_chip_mask_parent;

	pmc->irq.irq_unmask = irq_chip_unmask_parent;

	pmc->irq.irq_eoi = irq_chip_eoi_parent;

	pmc->irq.irq_set_affinity = irq_chip_set_affinity_parent;

	pmc->irq.irq_mask = tegra_irq_mask_parent;

	pmc->irq.irq_unmask = tegra_irq_unmask_parent;

	pmc->irq.irq_eoi = tegra_irq_eoi_parent;

	pmc->irq.irq_set_affinity = tegra_irq_set_affinity_parent;

	pmc->irq.irq_set_type = pmc->soc->irq_set_type;

	pmc->irq.irq_set_wake = pmc->soc->irq_set_wake;

include/linux/irqdomain.h

+3 −0
Original line number Diff line number Diff line
@@ -509,6 +509,9 @@ extern void irq_domain_free_irqs_parent(struct irq_domain *domain, 
					unsigned int irq_base,

					unsigned int nr_irqs);



extern int irq_domain_disconnect_hierarchy(struct irq_domain *domain,

					   unsigned int virq);



static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)

{

	return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY;

kernel/irq/irqdomain.c

+95 −4
Original line number Diff line number Diff line
@@ -1136,6 +1136,17 @@ static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain, 
	return irq_data;

}



static void __irq_domain_free_hierarchy(struct irq_data *irq_data)

{

	struct irq_data *tmp;



	while (irq_data) {

		tmp = irq_data;

		irq_data = irq_data->parent_data;

		kfree(tmp);

	}

}



static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)

{

	struct irq_data *irq_data, *tmp;
@@ -1147,12 +1158,83 @@ static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs) 
		irq_data->parent_data = NULL;

		irq_data->domain = NULL;



		while (tmp) {

			irq_data = tmp;

			tmp = tmp->parent_data;

			kfree(irq_data);

		__irq_domain_free_hierarchy(tmp);

	}

}



/**

 * irq_domain_disconnect_hierarchy - Mark the first unused level of a hierarchy

 * @domain:	IRQ domain from which the hierarchy is to be disconnected

 * @virq:	IRQ number where the hierarchy is to be trimmed

 *

 * Marks the @virq level belonging to @domain as disconnected.

 * Returns -EINVAL if @virq doesn't have a valid irq_data pointing

 * to @domain.

 *

 * Its only use is to be able to trim levels of hierarchy that do not

 * have any real meaning for this interrupt, and that the driver marks

 * as such from its .alloc() callback.

 */

int irq_domain_disconnect_hierarchy(struct irq_domain *domain,

				    unsigned int virq)

{

	struct irq_data *irqd;



	irqd = irq_domain_get_irq_data(domain, virq);

	if (!irqd)

		return -EINVAL;



	irqd->chip = ERR_PTR(-ENOTCONN);

	return 0;

}



static int irq_domain_trim_hierarchy(unsigned int virq)

{

	struct irq_data *tail, *irqd, *irq_data;



	irq_data = irq_get_irq_data(virq);

	tail = NULL;



	/* The first entry must have a valid irqchip */

	if (!irq_data->chip || IS_ERR(irq_data->chip))

		return -EINVAL;



	/*

	 * Validate that the irq_data chain is sane in the presence of

	 * a hierarchy trimming marker.

	 */

	for (irqd = irq_data->parent_data; irqd; irq_data = irqd, irqd = irqd->parent_data) {

		/* Can't have a valid irqchip after a trim marker */

		if (irqd->chip && tail)

			return -EINVAL;



		/* Can't have an empty irqchip before a trim marker */

		if (!irqd->chip && !tail)

			return -EINVAL;



		if (IS_ERR(irqd->chip)) {

			/* Only -ENOTCONN is a valid trim marker */

			if (PTR_ERR(irqd->chip) != -ENOTCONN)

				return -EINVAL;



			tail = irq_data;

		}

	}



	/* No trim marker, nothing to do */

	if (!tail)

		return 0;



	pr_info("IRQ%d: trimming hierarchy from %s\n",

		virq, tail->parent_data->domain->name);



	/* Sever the inner part of the hierarchy...  */

	irqd = tail;

	tail = tail->parent_data;

	irqd->parent_data = NULL;

	__irq_domain_free_hierarchy(tail);



	return 0;

}



static int irq_domain_alloc_irq_data(struct irq_domain *domain,
@@ -1362,6 +1444,15 @@ int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, 
		mutex_unlock(&irq_domain_mutex);

		goto out_free_irq_data;

	}



	for (i = 0; i < nr_irqs; i++) {

		ret = irq_domain_trim_hierarchy(virq + i);

		if (ret) {

			mutex_unlock(&irq_domain_mutex);

			goto out_free_irq_data;

		}

	}

	

	for (i = 0; i < nr_irqs; i++)

		irq_domain_insert_irq(virq + i);

	mutex_unlock(&irq_domain_mutex);

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