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dma: ste_dma40: Fixup system suspend/resume

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Make sure to handle register context save/restore when needed from
system PM callbacks.

Previously we solely trusted the device to reside in in-active state
while the system suspend callback were invoked, which is just too
optimistic.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Ulf Hansson 2014-04-23 21:52:04 +02:00 • committed by Vinod Koul
parent 123e4ca172
commit c906a3ec45
1 changed files with 10 additions and 3 deletions
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13
drivers/dma/ste_dma40.c
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@ -2945,7 +2945,11 @@ static int dma40_suspend(struct device *dev)
{ {
struct platform_device *pdev = to_platform_device(dev); struct platform_device *pdev = to_platform_device(dev);
struct d40_base *base = platform_get_drvdata(pdev); struct d40_base *base = platform_get_drvdata(pdev);
int ret = 0; int ret;
ret = pm_runtime_force_suspend(dev);
if (ret)
return ret;
if (base->lcpa_regulator) if (base->lcpa_regulator)
ret = regulator_disable(base->lcpa_regulator); ret = regulator_disable(base->lcpa_regulator);
@ -2958,11 +2962,14 @@ static int dma40_resume(struct device *dev)
struct d40_base *base = platform_get_drvdata(pdev); struct d40_base *base = platform_get_drvdata(pdev);
int ret = 0; int ret = 0;
if (base->lcpa_regulator) if (base->lcpa_regulator) {
ret = regulator_enable(base->lcpa_regulator); ret = regulator_enable(base->lcpa_regulator);
if (ret)
return ret; return ret;
} }
return pm_runtime_force_resume(dev);
}
#endif #endif
#ifdef CONFIG_PM #ifdef CONFIG_PM