--- Begin Message ---
- To: alsa-devel@xxxxxxxxxxxxxxxx
- Subject: [PATCH] ASoC: dwc: add reset support
- From: Maxim Kochetkov <fido_max@xxxxxxxx>
- Date: Fri, 21 Apr 2023 22:33:19 +0300
- Cc: lgirdwood@xxxxxxxxx, broonie@xxxxxxxxxx, tiwai@xxxxxxxx, p.zabel@xxxxxxxxxxxxxx, ckeepax@xxxxxxxxxxxxxxxxxxxxx, u.kleine-koenig@xxxxxxxxxxxxxx, nicolas.ferre@xxxxxxxxxxxxx, Maxim Kochetkov <fido_max@xxxxxxxx>
Some SoC may have resets for I2S subsystem. So add optional reset deassert at startup. Signed-off-by: Maxim Kochetkov <fido_max@xxxxxxxx> --- sound/soc/dwc/dwc-i2s.c | 9 +++++++++ sound/soc/dwc/local.h | 1 + 2 files changed, 10 insertions(+) diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c index acdf98b2ee9c..8c8bc7116f86 100644 --- a/sound/soc/dwc/dwc-i2s.c +++ b/sound/soc/dwc/dwc-i2s.c @@ -17,6 +17,7 @@ #include <linux/io.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/reset.h> #include <linux/slab.h> #include <linux/pm_runtime.h> #include <sound/designware_i2s.h> @@ -648,6 +649,14 @@ static int dw_i2s_probe(struct platform_device *pdev) if (IS_ERR(dev->i2s_base)) return PTR_ERR(dev->i2s_base); + dev->reset = devm_reset_control_array_get_optional_shared(&pdev->dev); + if (IS_ERR(dev->reset)) + return PTR_ERR(dev->reset); + + ret = reset_control_deassert(dev->reset); + if (ret) + return ret; + dev->dev = &pdev->dev; irq = platform_get_irq_optional(pdev, 0); diff --git a/sound/soc/dwc/local.h b/sound/soc/dwc/local.h index 1c361eb6127e..d64bd4f8fd34 100644 --- a/sound/soc/dwc/local.h +++ b/sound/soc/dwc/local.h @@ -89,6 +89,7 @@ union dw_i2s_snd_dma_data { struct dw_i2s_dev { void __iomem *i2s_base; struct clk *clk; + struct reset_control *reset; int active; unsigned int capability; unsigned int quirks; -- 2.39.2
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