diff options
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/img/img-i2s-out.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/sound/soc/img/img-i2s-out.c b/sound/soc/img/img-i2s-out.c index adc6902fcbd4..1d831c625fe2 100644 --- a/sound/soc/img/img-i2s-out.c +++ b/sound/soc/img/img-i2s-out.c @@ -63,6 +63,8 @@ struct img_i2s_out { unsigned int active_channels; struct reset_control *rst; struct snd_soc_dai_driver dai_driver; + u32 suspend_ctl; + u32 *suspend_ch_ctl; }; static int img_i2s_out_runtime_suspend(struct device *dev) @@ -471,6 +473,13 @@ static int img_i2s_out_probe(struct platform_device *pdev) if (ret) return ret; + i2s->suspend_ch_ctl = devm_kzalloc(dev, + sizeof(*i2s->suspend_ch_ctl) * i2s->max_i2s_chan, GFP_KERNEL); + if (!i2s->suspend_ch_ctl) { + ret = -ENOMEM; + goto err_clk_disable; + } + reg = IMG_I2S_OUT_CTL_FRM_SIZE_MASK; img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL); @@ -520,6 +529,7 @@ err_suspend: img_i2s_out_runtime_suspend(&pdev->dev); err_pm_disable: pm_runtime_disable(&pdev->dev); +err_clk_disable: clk_disable_unprepare(i2s->clk_sys); return ret; @@ -538,6 +548,55 @@ static int img_i2s_out_dev_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int img_i2s_out_suspend(struct device *dev) +{ + struct img_i2s_out *i2s = dev_get_drvdata(dev); + int i, ret; + u32 reg; + + if (pm_runtime_status_suspended(dev)) { + ret = img_i2s_out_runtime_resume(dev); + if (ret) + return ret; + } + + for (i = 0; i < i2s->max_i2s_chan; i++) { + reg = img_i2s_out_ch_readl(i2s, i, IMG_I2S_OUT_CH_CTL); + i2s->suspend_ch_ctl[i] = reg; + } + + i2s->suspend_ctl = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL); + + img_i2s_out_runtime_suspend(dev); + + return 0; +} + +static int img_i2s_out_resume(struct device *dev) +{ + struct img_i2s_out *i2s = dev_get_drvdata(dev); + int i, ret; + u32 reg; + + ret = img_i2s_out_runtime_resume(dev); + if (ret) + return ret; + + for (i = 0; i < i2s->max_i2s_chan; i++) { + reg = i2s->suspend_ch_ctl[i]; + img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL); + } + + img_i2s_out_writel(i2s, i2s->suspend_ctl, IMG_I2S_OUT_CTL); + + if (pm_runtime_status_suspended(dev)) + img_i2s_out_runtime_suspend(dev); + + return 0; +} +#endif + static const struct of_device_id img_i2s_out_of_match[] = { { .compatible = "img,i2s-out" }, {} @@ -547,6 +606,7 @@ MODULE_DEVICE_TABLE(of, img_i2s_out_of_match); static const struct dev_pm_ops img_i2s_out_pm_ops = { SET_RUNTIME_PM_OPS(img_i2s_out_runtime_suspend, img_i2s_out_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(img_i2s_out_suspend, img_i2s_out_resume) }; static struct platform_driver img_i2s_out_driver = { |