#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>
{
struct tegra20_i2s *i2s = dev_get_drvdata(dev);
+ regcache_cache_only(i2s->regmap, true);
+
clk_disable_unprepare(i2s->clk_i2s);
return 0;
struct tegra20_i2s *i2s = dev_get_drvdata(dev);
int ret;
+ ret = reset_control_assert(i2s->reset);
+ if (ret)
+ return ret;
+
ret = clk_prepare_enable(i2s->clk_i2s);
if (ret) {
dev_err(dev, "clk_enable failed: %d\n", ret);
return ret;
}
+ usleep_range(10, 100);
+
+ ret = reset_control_deassert(i2s->reset);
+ if (ret)
+ goto disable_clocks;
+
+ regcache_cache_only(i2s->regmap, false);
+ regcache_mark_dirty(i2s->regmap);
+
+ ret = regcache_sync(i2s->regmap);
+ if (ret)
+ goto disable_clocks;
+
return 0;
+
+disable_clocks:
+ clk_disable_unprepare(i2s->clk_i2s);
+
+ return ret;
}
static int tegra20_i2s_set_fmt(struct snd_soc_dai *dai,
i2s->dai = tegra20_i2s_dai_template;
i2s->dai.name = dev_name(&pdev->dev);
+ i2s->reset = devm_reset_control_get_exclusive(&pdev->dev, "i2s");
+ if (IS_ERR(i2s->reset)) {
+ dev_err(&pdev->dev, "Can't retrieve i2s reset\n");
+ return PTR_ERR(i2s->reset);
+ }
+
i2s->clk_i2s = clk_get(&pdev->dev, NULL);
if (IS_ERR(i2s->clk_i2s)) {
dev_err(&pdev->dev, "Can't retrieve i2s clock\n");