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| author | Stephen Warren <swarren@nvidia.com> | 2013-06-03 11:37:42 -0600 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-06-03 19:53:07 +0100 |
| commit | 5c5b08286fa4d782e44cae8738cf4328a29c4326 (patch) | |
| tree | 4a7c71cdfcce90ef261b58cee71aa3224cf4ac95 /sound/soc/tegra | |
| parent | 2f41a3f48a1400234a4213851453dcb4274322f5 (diff) | |
| download | lwn-5c5b08286fa4d782e44cae8738cf4328a29c4326.tar.gz lwn-5c5b08286fa4d782e44cae8738cf4328a29c4326.zip | |
ASoC: tegra: implement suspend/resume for Tegra30 I2S
Add tegra30_i2s_{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>
Diffstat (limited to 'sound/soc/tegra')
| -rw-r--r-- | sound/soc/tegra/tegra30_i2s.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c index 31d092d83c71..bd0ebc09c8be 100644 --- a/sound/soc/tegra/tegra30_i2s.c +++ b/sound/soc/tegra/tegra30_i2s.c @@ -514,6 +514,24 @@ static int tegra30_i2s_platform_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int tegra30_i2s_suspend(struct device *dev) +{ + struct tegra30_i2s *i2s = dev_get_drvdata(dev); + + regcache_mark_dirty(i2s->regmap); + + return 0; +} + +static int tegra30_i2s_resume(struct device *dev) +{ + struct tegra30_i2s *i2s = dev_get_drvdata(dev); + + return regcache_sync(i2s->regmap); +} +#endif + static const struct of_device_id tegra30_i2s_of_match[] = { { .compatible = "nvidia,tegra30-i2s", }, {}, @@ -522,6 +540,7 @@ static const struct of_device_id tegra30_i2s_of_match[] = { static const struct dev_pm_ops tegra30_i2s_pm_ops = { SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend, tegra30_i2s_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(tegra30_i2s_suspend, tegra30_i2s_resume) }; static struct platform_driver tegra30_i2s_driver = { |