When there is power domain bind with bus clock,
The call flow: devm_regmap_init_mmio_clk - clk_prepare() - clk_pm_runtime_get()
cause the power domain of clock always be enabled after regmap_init(). which impact the power consumption.
So use devm_regmap_init_mmio instead of devm_regmap_init_mmio_clk, then explicitly enable clock when using by pm_runtime_get(), if CONFIG_PM=n, then fsl_sai_runtime_resume will be explicitly called.
Signed-off-by: Shengjiu Wang shengjiu.wang@nxp.com Signed-off-by: Viorel Suman viorel.suman@nxp.com --- sound/soc/fsl/fsl_sai.c | 48 +++++++++++++++++++++++++++-------------- 1 file changed, 32 insertions(+), 16 deletions(-)
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 9e7893f91882..f2c70a31c7bb 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -987,6 +987,9 @@ static int fsl_sai_check_version(struct device *dev) return 0; }
+static int fsl_sai_runtime_suspend(struct device *dev); +static int fsl_sai_runtime_resume(struct device *dev); + static int fsl_sai_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -1019,24 +1022,21 @@ static int fsl_sai_probe(struct platform_device *pdev) ARRAY_SIZE(fsl_sai_reg_defaults_ofs8); }
- sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, - "bus", base, &fsl_sai_regmap_config); - - /* Compatible with old DTB cases */ - if (IS_ERR(sai->regmap) && PTR_ERR(sai->regmap) != -EPROBE_DEFER) - sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, - "sai", base, &fsl_sai_regmap_config); + sai->regmap = devm_regmap_init_mmio(&pdev->dev, base, &fsl_sai_regmap_config); if (IS_ERR(sai->regmap)) { dev_err(&pdev->dev, "regmap init failed\n"); return PTR_ERR(sai->regmap); }
- /* No error out for old DTB cases but only mark the clock NULL */ sai->bus_clk = devm_clk_get(&pdev->dev, "bus"); + /* Compatible with old DTB cases */ + if (IS_ERR(sai->bus_clk) && PTR_ERR(sai->bus_clk) != -EPROBE_DEFER) + sai->bus_clk = devm_clk_get(&pdev->dev, "sai"); if (IS_ERR(sai->bus_clk)) { dev_err(&pdev->dev, "failed to get bus clock: %ld\n", PTR_ERR(sai->bus_clk)); - sai->bus_clk = NULL; + /* -EPROBE_DEFER */ + return PTR_ERR(sai->bus_clk); }
for (i = 1; i < FSL_SAI_MCLK_MAX; i++) { @@ -1117,6 +1117,18 @@ static int fsl_sai_probe(struct platform_device *pdev) sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX;
platform_set_drvdata(pdev, sai); + pm_runtime_enable(&pdev->dev); + if (!pm_runtime_enabled(&pdev->dev)) { + ret = fsl_sai_runtime_resume(&pdev->dev); + if (ret) + goto err_pm_disable; + } + + ret = pm_runtime_get_sync(&pdev->dev); + if (ret < 0) { + pm_runtime_put_noidle(&pdev->dev); + goto err_pm_get_sync; + }
/* Get sai version */ ret = fsl_sai_check_version(&pdev->dev); @@ -1130,26 +1142,30 @@ static int fsl_sai_probe(struct platform_device *pdev) FSL_SAI_MCTL_MCLK_EN, FSL_SAI_MCTL_MCLK_EN); }
- pm_runtime_enable(&pdev->dev); - regcache_cache_only(sai->regmap, true); + ret = pm_runtime_put_sync(&pdev->dev); + if (ret < 0) + goto err_pm_get_sync;
ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, &sai->cpu_dai_drv, 1); if (ret) - goto err_pm_disable; + goto err_pm_get_sync;
if (sai->soc_data->use_imx_pcm) { ret = imx_pcm_dma_init(pdev, IMX_SAI_DMABUF_SIZE); if (ret) - goto err_pm_disable; + goto err_pm_get_sync; } else { ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); if (ret) - goto err_pm_disable; + goto err_pm_get_sync; }
return ret;
+err_pm_get_sync: + if (!pm_runtime_status_suspended(&pdev->dev)) + fsl_sai_runtime_suspend(&pdev->dev); err_pm_disable: pm_runtime_disable(&pdev->dev);
@@ -1159,6 +1175,8 @@ static int fsl_sai_probe(struct platform_device *pdev) static int fsl_sai_remove(struct platform_device *pdev) { pm_runtime_disable(&pdev->dev); + if (!pm_runtime_status_suspended(&pdev->dev)) + fsl_sai_runtime_suspend(&pdev->dev);
return 0; } @@ -1219,7 +1237,6 @@ static const struct of_device_id fsl_sai_ids[] = { }; MODULE_DEVICE_TABLE(of, fsl_sai_ids);
-#ifdef CONFIG_PM static int fsl_sai_runtime_suspend(struct device *dev) { struct fsl_sai *sai = dev_get_drvdata(dev); @@ -1292,7 +1309,6 @@ static int fsl_sai_runtime_resume(struct device *dev)
return ret; } -#endif /* CONFIG_PM */
static const struct dev_pm_ops fsl_sai_pm_ops = { SET_RUNTIME_PM_OPS(fsl_sai_runtime_suspend,