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ASoC: tegra: implement suspend/resume for Tegra30 AHUB

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Add tegra30_ahub_{suspend,resume}. These use regcache functions to
restore all HW registers after power loss during a suspend/resume cycle.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Stephen Warren 2013-06-03 11:37:41 -06:00 committed by Mark Brown
parent 110147c8c5
commit 2f41a3f48a
1 changed files with 21 additions and 0 deletions
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21
sound/soc/tegra/tegra30_ahub.c
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@ -627,9 +627,30 @@ static int tegra30_ahub_remove(struct platform_device *pdev)
return 0; return 0;
} }
#ifdef CONFIG_PM_SLEEP
static int tegra30_ahub_suspend(struct device *dev)
{
regcache_mark_dirty(ahub->regmap_ahub);
regcache_mark_dirty(ahub->regmap_apbif);
return 0;
}
static int tegra30_ahub_resume(struct device *dev)
{
int ret;
ret = regcache_sync(ahub->regmap_ahub);
ret |= regcache_sync(ahub->regmap_apbif);
return ret;
}
#endif
static const struct dev_pm_ops tegra30_ahub_pm_ops = { static const struct dev_pm_ops tegra30_ahub_pm_ops = {
SET_RUNTIME_PM_OPS(tegra30_ahub_runtime_suspend, SET_RUNTIME_PM_OPS(tegra30_ahub_runtime_suspend,
tegra30_ahub_runtime_resume, NULL) tegra30_ahub_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(tegra30_ahub_suspend, tegra30_ahub_resume)
}; };
static struct platform_driver tegra30_ahub_driver = { static struct platform_driver tegra30_ahub_driver = {