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Subject[PATCH/RFC 02/03] irqchip: renesas-irqc: Add fine grained Runtime PM code
From: Magnus Damm <damm+renesas@opensource.se>

Convert Runtime PM support from coarse grained "always enabled"
into more fine grained per-interrupt optional enablement.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
---

drivers/irqchip/irq-renesas-irqc.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

--- 0002/drivers/irqchip/irq-renesas-irqc.c
+++ work/drivers/irqchip/irq-renesas-irqc.c 2015-04-21 23:16:17.686370138 +0900
@@ -96,12 +96,18 @@ static void irqc_irq_mask(struct irq_dat

static void irqc_irq_enable(struct irq_data *d)
{
+ struct irqc_priv *p = irq_data_get_irq_chip_data(d);
+
+ pm_runtime_get_sync(&p->pdev->dev);
irqc_irq_unmask(d);
}

static void irqc_irq_disable(struct irq_data *d)
{
+ struct irqc_priv *p = irq_data_get_irq_chip_data(d);
+
irqc_irq_mask(d);
+ pm_runtime_put(&p->pdev->dev);
}

static unsigned char irqc_sense[IRQ_TYPE_SENSE_MASK + 1] = {
@@ -124,10 +130,12 @@ static int irqc_irq_set_type(struct irq_
if (!value)
return -EINVAL;

+ pm_runtime_get_sync(&p->pdev->dev);
tmp = ioread32(p->iomem + IRQC_CONFIG(hw_irq));
tmp &= ~0x3f;
tmp |= value;
iowrite32(tmp, p->iomem + IRQC_CONFIG(hw_irq));
+ pm_runtime_put(&p->pdev->dev);
return 0;
}

@@ -215,7 +223,6 @@ static int irqc_probe(struct platform_de
}

pm_runtime_enable(&pdev->dev);
- pm_runtime_get_sync(&pdev->dev);

/* get hold of manadatory IOMEM */
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -300,7 +307,6 @@ err3:
err2:
iounmap(p->iomem);
err1:
- pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
kfree(p);
err0:
@@ -317,7 +323,6 @@ static int irqc_remove(struct platform_d

irq_domain_remove(p->irq_domain);
iounmap(p->iomem);
- pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
kfree(p);
return 0;

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