[PATCH 03/14] ASoC: sun4i-i2s: Add apb reset

Mylène Josserand
2016-10-04T09:46:16Z

Add APB deassert function for sun4i-i2s driver.

Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com>
---
sound/soc/sunxi/sun4i-i2s.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 687a8f8..f3f7026 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -17,6 +17,7 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
+#include <linux/reset.h>

#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
@@ -589,6 +590,7 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
{
struct sun4i_i2s *i2s;
struct resource *res;
+ struct reset_control *reset_apb;
void __iomem *regs;
int irq, ret;

@@ -626,7 +628,19 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Can't get our mod clock\n");
return PTR_ERR(i2s->mod_clk);
}
-
+
+ reset_apb = devm_reset_control_get(&pdev->dev, "apb_reset");
+ if (IS_ERR(reset_apb)) {
+ dev_err(&pdev->dev, "Can't get apb reset\n");
+ return PTR_ERR(i2s->mod_clk);
+ }
+
+ ret = reset_control_deassert(reset_apb);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Can't deassert apb reset (%d)\n", ret);
+ return ret;
+ }
+
i2s->playback_dma_data.addr = res->start + SUN4I_I2S_FIFO_TX_REG;
i2s->playback_dma_data.maxburst = 4;

--
2.9.3