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irqchip: renesas-irqc: Add minimal runtime PM support 

This is just enough to let pm_clk_*() enable the functional clock, and
manage it for suspend/resume, if present.
Before, it was assumed enabled by the bootloader or reset state.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Link: https://lkml.kernel.org/r/1426704961-27322-3-git-send-email-geert+renesas@glider.be
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Geert Uytterhoeven 2015-03-18 19:55:56 +01:00 committed by Jason Cooper
parent 1cd5ec7330
commit 51b05f6b8a
1 changed files with 8 additions and 0 deletions
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8
drivers/irqchip/irq-renesas-irqc.c
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@ -29,6 +29,7 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_data/irq-renesas-irqc.h>
#include <linux/pm_runtime.h>
#define IRQC_IRQ_MAX 32 /* maximum 32 interrupts per driver instance */
@ -180,6 +181,9 @@ static int irqc_probe(struct platform_device *pdev)
p->pdev = pdev;
platform_set_drvdata(pdev, p);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
/* get hold of manadatory IOMEM */
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io) {
@ -260,6 +264,8 @@ static int irqc_probe(struct platform_device *pdev)
err2:
iounmap(p->iomem);
err1:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
kfree(p);
err0:
return ret;
@ -275,6 +281,8 @@ static int irqc_remove(struct platform_device *pdev)
irq_domain_remove(p->irq_domain);
iounmap(p->iomem);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
kfree(p);
return 0;
}