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Commit 6f46aedb authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Jason Cooper
Browse files

irqchip: renesas-irqc: Add wake-up support 



The IRQC module clock is managed through Runtime PM and PM Domains.
If wake-up is enabled, this clock must not be disabled during system
suspend.

Hence implement irq_chip.irq_set_wake(), which increments/decrements the
clock's enable_count when needed.

This fixes wake-up by gpio-keys on r8a73a4/ape6evm.

Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarSimon Horman <horms+renesas@verge.net.au>
Link: https://lkml.kernel.org/r/1427889606-18671-1-git-send-email-geert+renesas@glider.be


Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
parent 5593ce64

drivers/irqchip/irq-renesas-irqc.c

+25 −1
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */



#include <linux/clk.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/spinlock.h>
@@ -66,6 +67,7 @@ struct irqc_priv { 
	struct platform_device *pdev;

	struct irq_chip irq_chip;

	struct irq_domain *irq_domain;

	struct clk *clk;

};



static void irqc_dbg(struct irqc_irq *i, char *str)
@@ -119,6 +121,21 @@ static int irqc_irq_set_type(struct irq_data *d, unsigned int type) 
	return 0;

}



static int irqc_irq_set_wake(struct irq_data *d, unsigned int on)

{

	struct irqc_priv *p = irq_data_get_irq_chip_data(d);



	if (!p->clk)

		return 0;



	if (on)

		clk_enable(p->clk);

	else

		clk_disable(p->clk);



	return 0;

}



static irqreturn_t irqc_irq_handler(int irq, void *dev_id)

{

	struct irqc_irq *i = dev_id;
@@ -181,6 +198,12 @@ static int irqc_probe(struct platform_device *pdev) 
	p->pdev = pdev;

	platform_set_drvdata(pdev, p);



	p->clk = devm_clk_get(&pdev->dev, NULL);

	if (IS_ERR(p->clk)) {

		dev_warn(&pdev->dev, "unable to get clock\n");

		p->clk = NULL;

	}



	pm_runtime_enable(&pdev->dev);

	pm_runtime_get_sync(&pdev->dev);
@@ -224,7 +247,8 @@ static int irqc_probe(struct platform_device *pdev) 
	irq_chip->irq_mask = irqc_irq_disable;

	irq_chip->irq_unmask = irqc_irq_enable;

	irq_chip->irq_set_type = irqc_irq_set_type;

	irq_chip->flags	= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;

	irq_chip->irq_set_wake = irqc_irq_set_wake;

	irq_chip->flags	= IRQCHIP_MASK_ON_SUSPEND;



	p->irq_domain = irq_domain_add_simple(pdev->dev.of_node,

					      p->number_of_irqs,