diff options
Diffstat (limited to 'sound/soc/tegra/tegra20_spdif.c')
| -rw-r--r-- | sound/soc/tegra/tegra20_spdif.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra20_spdif.c b/sound/soc/tegra/tegra20_spdif.c index 7dd263721c2c..bc45a0a8afab 100644 --- a/sound/soc/tegra/tegra20_spdif.c +++ b/sound/soc/tegra/tegra20_spdif.c @@ -7,6 +7,7 @@ */ #include <linux/clk.h> +#include <linux/delay.h> #include <linux/device.h> #include <linux/io.h> #include <linux/module.h> @@ -14,6 +15,7 @@ #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> +#include <linux/reset.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> @@ -27,6 +29,8 @@ static __maybe_unused int tegra20_spdif_runtime_suspend(struct device *dev) { struct tegra20_spdif *spdif = dev_get_drvdata(dev); + regcache_cache_only(spdif->regmap, true); + clk_disable_unprepare(spdif->clk_spdif_out); return 0; @@ -37,13 +41,35 @@ static __maybe_unused int tegra20_spdif_runtime_resume(struct device *dev) struct tegra20_spdif *spdif = dev_get_drvdata(dev); int ret; + ret = reset_control_assert(spdif->reset); + if (ret) + return ret; + ret = clk_prepare_enable(spdif->clk_spdif_out); if (ret) { dev_err(dev, "clk_enable failed: %d\n", ret); return ret; } + usleep_range(10, 100); + + ret = reset_control_deassert(spdif->reset); + if (ret) + goto disable_clocks; + + regcache_cache_only(spdif->regmap, false); + regcache_mark_dirty(spdif->regmap); + + ret = regcache_sync(spdif->regmap); + if (ret) + goto disable_clocks; + return 0; + +disable_clocks: + clk_disable_unprepare(spdif->clk_spdif_out); + + return ret; } static int tegra20_spdif_hw_params(struct snd_pcm_substream *substream, @@ -268,6 +294,12 @@ static int tegra20_spdif_platform_probe(struct platform_device *pdev) dev_set_drvdata(&pdev->dev, spdif); + spdif->reset = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(spdif->reset)) { + dev_err(&pdev->dev, "Can't retrieve spdif reset\n"); + return PTR_ERR(spdif->reset); + } + spdif->clk_spdif_out = devm_clk_get(&pdev->dev, "out"); if (IS_ERR(spdif->clk_spdif_out)) { dev_err(&pdev->dev, "Could not retrieve spdif clock\n"); |