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| author |  Mark Brown <broonie@kernel.org>
| 2015-10-26 11:07:40 +0900 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org>
| 2015-10-26 11:07:40 +0900 |
| commit | ce247b45a3289f88008c13ca26ccde0db5fea690 (patch) | |
| tree | 3f02183a34c6bb6aa71f165334a89b9597823b4b /sound/soc/fsl/fsl_sai.c | |
| parent | ASoC: fsl_sai: Constify rate constraints (diff) | |
| parent | ASoC: fsl_esai: Add driver suspend and resume to support MEGA Fast (diff) | |
| download | linux-ce247b45a3289f88008c13ca26ccde0db5fea690.tar.gz linux-ce247b45a3289f88008c13ca26ccde0db5fea690.tar.bz2 linux-ce247b45a3289f88008c13ca26ccde0db5fea690.zip | |
Merge branch 'topic/fsl-mega-fast' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-fsl
Diffstat (limited to 'sound/soc/fsl/fsl_sai.c')
| -rw-r--r-- | sound/soc/fsl/fsl_sai.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 2150f5aaba7a..38505f32ebe6 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -637,6 +637,8 @@ static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg) static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { + case FSL_SAI_TCSR: + case FSL_SAI_RCSR: case FSL_SAI_TFR: case FSL_SAI_RFR: case FSL_SAI_TDR: @@ -681,6 +683,7 @@ static const struct regmap_config fsl_sai_regmap_config = { .readable_reg = fsl_sai_readable_reg, .volatile_reg = fsl_sai_volatile_reg, .writeable_reg = fsl_sai_writeable_reg, + .cache_type = REGCACHE_FLAT, }; static int fsl_sai_probe(struct platform_device *pdev) @@ -803,10 +806,40 @@ static const struct of_device_id fsl_sai_ids[] = { }; MODULE_DEVICE_TABLE(of, fsl_sai_ids); +#if CONFIG_PM_SLEEP +static int fsl_sai_suspend(struct device *dev) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + + regcache_cache_only(sai->regmap, true); + regcache_mark_dirty(sai->regmap); + + return 0; +} + +static int fsl_sai_resume(struct device *dev) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + + regcache_cache_only(sai->regmap, false); + regmap_write(sai->regmap, FSL_SAI_TCSR, FSL_SAI_CSR_SR); + regmap_write(sai->regmap, FSL_SAI_RCSR, FSL_SAI_CSR_SR); + msleep(1); + regmap_write(sai->regmap, FSL_SAI_TCSR, 0); + regmap_write(sai->regmap, FSL_SAI_RCSR, 0); + return regcache_sync(sai->regmap); +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops fsl_sai_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(fsl_sai_suspend, fsl_sai_resume) +}; + static struct platform_driver fsl_sai_driver = { .probe = fsl_sai_probe, .driver = { .name = "fsl-sai", + .pm = &fsl_sai_pm_ops, .of_match_table = fsl_sai_ids, }, }; |