[PATCH 6/6] ASoC: fsl_micfil: Don't use devm_regmap_init_mmio_clk

[Shengjiu Wang]

When there is power domain bind with ipg_clk 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,but explicitly enable
clock when it is used.

Signed-off-by: Shengjiu Wang <shengjiu.w...@nxp.com>
Reviewed-by: Viorel Suman <viorel.su...@nxp.com>
---
 sound/soc/fsl/fsl_micfil.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/sound/soc/fsl/fsl_micfil.c b/sound/soc/fsl/fsl_micfil.c
index 2b9edd4bb94d..3cf789ed6cbe 100644
--- a/sound/soc/fsl/fsl_micfil.c
+++ b/sound/soc/fsl/fsl_micfil.c
@@ -31,6 +31,7 @@ struct fsl_micfil {
        struct platform_device *pdev;
        struct regmap *regmap;
        const struct fsl_micfil_soc_data *soc;
+       struct clk *busclk;
        struct clk *mclk;
        struct snd_dmaengine_dai_dma_data dma_params_rx;
        unsigned int dataline;
@@ -660,16 +661,22 @@ static int fsl_micfil_probe(struct platform_device *pdev)
                return PTR_ERR(micfil->mclk);
        }
 
+       micfil->busclk = devm_clk_get(&pdev->dev, "ipg_clk");
+       if (IS_ERR(micfil->busclk)) {
+               dev_err(&pdev->dev, "failed to get ipg clock: %ld\n",
+                       PTR_ERR(micfil->busclk));
+               return PTR_ERR(micfil->busclk);
+       }
+
        /* init regmap */
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        regs = devm_ioremap_resource(&pdev->dev, res);
        if (IS_ERR(regs))
                return PTR_ERR(regs);
 
-       micfil->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
-                                                  "ipg_clk",
-                                                  regs,
-                                                  &fsl_micfil_regmap_config);
+       micfil->regmap = devm_regmap_init_mmio(&pdev->dev,
+                                              regs,
+                                              &fsl_micfil_regmap_config);
        if (IS_ERR(micfil->regmap)) {
                dev_err(&pdev->dev, "failed to init MICFIL regmap: %ld\n",
                        PTR_ERR(micfil->regmap));
@@ -729,6 +736,7 @@ static int fsl_micfil_probe(struct platform_device *pdev)
        platform_set_drvdata(pdev, micfil);
 
        pm_runtime_enable(&pdev->dev);
+       regcache_cache_only(micfil->regmap, true);
 
        ret = devm_snd_soc_register_component(&pdev->dev, &fsl_micfil_component,
                                              &fsl_micfil_dai, 1);
@@ -752,6 +760,7 @@ static int __maybe_unused fsl_micfil_runtime_suspend(struct 
device *dev)
        regcache_cache_only(micfil->regmap, true);
 
        clk_disable_unprepare(micfil->mclk);
+       clk_disable_unprepare(micfil->busclk);
 
        return 0;
 }
@@ -761,10 +770,16 @@ static int __maybe_unused 
fsl_micfil_runtime_resume(struct device *dev)
        struct fsl_micfil *micfil = dev_get_drvdata(dev);
        int ret;
 
-       ret = clk_prepare_enable(micfil->mclk);
+       ret = clk_prepare_enable(micfil->busclk);
        if (ret < 0)
                return ret;
 
+       ret = clk_prepare_enable(micfil->mclk);
+       if (ret < 0) {
+               clk_disable_unprepare(micfil->busclk);
+               return ret;
+       }
+
        regcache_cache_only(micfil->regmap, false);
        regcache_mark_dirty(micfil->regmap);
        regcache_sync(micfil->regmap);
-- 
2.27.0