diff options
| author | Nikesh Oswal <noswal@nvidia.com> | 2011-12-13 15:10:28 +0530 |
|---|---|---|
| committer | Varun Wadekar <vwadekar@nvidia.com> | 2011-12-15 12:11:53 +0530 |
| commit | c7eca96f46f1162893f1031d406e22d2e20b061a (patch) | |
| tree | e4b48cbea1c90cf2235f5b93f72823be03e51872 /sound/soc/tegra/tegra20_das.h | |
| parent | e3794ce5d5d055f9e7939874297e0fe12e41e619 (diff) | |
asoc: tegra: restore i2s/das/spdif registers after suspend for t20
when system resumes from suspend state the i2s/das/spdif registers
have power on reset values, this change restores the registers
with their prior values from cache
Bug: 904530
Change-Id: I35c14d95d2d6bf5bc116a1a80e21f4904c8969e5
Signed-off-by: Nikesh Oswal <noswal@nvidia.com>
Reviewed-on: http://git-master/r/69715
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sumit Bhattacharya <sumitb@nvidia.com>
Reviewed-by: Scott Peterson <speterson@nvidia.com>
Diffstat (limited to 'sound/soc/tegra/tegra20_das.h')
| -rw-r--r-- | sound/soc/tegra/tegra20_das.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra20_das.h b/sound/soc/tegra/tegra20_das.h index 2fd731b70849..1d7c57fd0092 100644 --- a/sound/soc/tegra/tegra20_das.h +++ b/sound/soc/tegra/tegra20_das.h @@ -83,12 +83,23 @@ #define TEGRA20_DAS_DAC_ID_2 1 #define TEGRA20_DAS_DAC_ID_3 2 +#ifdef CONFIG_PM +#define TEGRA20_DAS_CACHE_SIZE ((((TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL) + (TEGRA20_DAS_DAC_INPUT_DATA_CLK_SEL_STRIDE*TEGRA20_DAS_DAC_ID_3))>>2) + 1) +#endif + struct tegra20_das { struct device *dev; void __iomem *regs; struct dentry *debug; +#ifdef CONFIG_PM + u32 reg_cache[TEGRA20_DAS_CACHE_SIZE]; +#endif }; +#ifdef CONFIG_PM +/* Restores the das registers from cache */ +extern int tegra20_das_resume(); +#endif /* * Terminology: * DAS: Digital audio switch (HW module controlled by this driver) |