--- Begin Message ---
- To: alsa-devel@xxxxxxxxxxxxxxxx
- Subject: [PATCH v2 1/2] ASoC: dwc: add optional reset support
- From: Maxim Kochetkov <fido_max@xxxxxxxx>
- Date: Thu, 4 May 2023 10:16:17 +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 support. Signed-off-by: Maxim Kochetkov <fido_max@xxxxxxxx> --- sound/soc/dwc/dwc-i2s.c | 27 +++++++++++++++++++++------ sound/soc/dwc/local.h | 1 + 2 files changed, 22 insertions(+), 6 deletions(-) diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c index acdf98b2ee9c..e2b2ba014a2e 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); @@ -656,7 +665,7 @@ static int dw_i2s_probe(struct platform_device *pdev) pdev->name, dev); if (ret < 0) { dev_err(&pdev->dev, "failed to request irq\n"); - return ret; + goto err_assert_reset; } } @@ -676,24 +685,27 @@ static int dw_i2s_probe(struct platform_device *pdev) ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res); } if (ret < 0) - return ret; + goto err_assert_reset; if (dev->capability & DW_I2S_MASTER) { if (pdata) { dev->i2s_clk_cfg = pdata->i2s_clk_cfg; if (!dev->i2s_clk_cfg) { dev_err(&pdev->dev, "no clock configure method\n"); - return -ENODEV; + ret = -ENODEV; + goto err_assert_reset; } } dev->clk = devm_clk_get(&pdev->dev, clk_id); - if (IS_ERR(dev->clk)) - return PTR_ERR(dev->clk); + if (IS_ERR(dev->clk)) { + ret = PTR_ERR(dev->clk); + goto err_assert_reset; + } ret = clk_prepare_enable(dev->clk); if (ret < 0) - return ret; + goto err_assert_reset; } dev_set_drvdata(&pdev->dev, dev); @@ -727,6 +739,8 @@ static int dw_i2s_probe(struct platform_device *pdev) err_clk_disable: if (dev->capability & DW_I2S_MASTER) clk_disable_unprepare(dev->clk); +err_assert_reset: + reset_control_assert(dev->reset); return ret; } @@ -737,6 +751,7 @@ static void dw_i2s_remove(struct platform_device *pdev) if (dev->capability & DW_I2S_MASTER) clk_disable_unprepare(dev->clk); + reset_control_assert(dev->reset); pm_runtime_disable(&pdev->dev); } 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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