#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>
}
dev_set_drvdata(&pdev->dev, ac97);
+ ac97->reset = devm_reset_control_get_exclusive(&pdev->dev, "ac97");
+ if (IS_ERR(ac97->reset)) {
+ dev_err(&pdev->dev, "Can't retrieve ac97 reset\n");
+ return PTR_ERR(ac97->reset);
+ }
+
ac97->clk_ac97 = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(ac97->clk_ac97)) {
dev_err(&pdev->dev, "Can't retrieve ac97 clock\n");
ac97->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
ac97->playback_dma_data.maxburst = 4;
+ ret = reset_control_assert(ac97->reset);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to assert AC'97 reset: %d\n", ret);
+ goto err_clk_put;
+ }
+
ret = clk_prepare_enable(ac97->clk_ac97);
if (ret) {
dev_err(&pdev->dev, "clk_enable failed: %d\n", ret);
goto err_clk_put;
}
+ usleep_range(10, 100);
+
+ ret = reset_control_deassert(ac97->reset);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to deassert AC'97 reset: %d\n", ret);
+ goto err_clk_disable_unprepare;
+ }
+
ret = snd_soc_set_ac97_ops(&tegra20_ac97_ops);
if (ret) {
dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);