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path: root/sound/soc/img/img-spdif-in.c
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Diffstat (limited to 'sound/soc/img/img-spdif-in.c')
-rw-r--r--sound/soc/img/img-spdif-in.c110
1 files changed, 99 insertions, 11 deletions
diff --git a/sound/soc/img/img-spdif-in.c b/sound/soc/img/img-spdif-in.c
index 8adfd65d4390..cedd40c8d1f3 100644
--- a/sound/soc/img/img-spdif-in.c
+++ b/sound/soc/img/img-spdif-in.c
@@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <sound/core.h>
@@ -82,11 +83,36 @@ struct img_spdif_in {
unsigned int single_freq;
unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
bool active;
+ u32 suspend_clkgen;
+ u32 suspend_ctl;
/* Write-only registers */
unsigned int aclkgen_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
};
+static int img_spdif_in_runtime_suspend(struct device *dev)
+{
+ struct img_spdif_in *spdif = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(spdif->clk_sys);
+
+ return 0;
+}
+
+static int img_spdif_in_runtime_resume(struct device *dev)
+{
+ struct img_spdif_in *spdif = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(spdif->clk_sys);
+ if (ret) {
+ dev_err(dev, "Unable to enable sys clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+
static inline void img_spdif_in_writel(struct img_spdif_in *spdif,
u32 val, u32 reg)
{
@@ -723,15 +749,21 @@ static int img_spdif_in_probe(struct platform_device *pdev)
return PTR_ERR(spdif->clk_sys);
}
- ret = clk_prepare_enable(spdif->clk_sys);
- if (ret)
- return ret;
+ pm_runtime_enable(&pdev->dev);
+ if (!pm_runtime_enabled(&pdev->dev)) {
+ ret = img_spdif_in_runtime_resume(&pdev->dev);
+ if (ret)
+ goto err_pm_disable;
+ }
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0)
+ goto err_suspend;
rst = devm_reset_control_get_exclusive(&pdev->dev, "rst");
if (IS_ERR(rst)) {
if (PTR_ERR(rst) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
- goto err_clk_disable;
+ goto err_pm_put;
}
dev_dbg(dev, "No top level reset found\n");
img_spdif_in_writel(spdif, IMG_SPDIF_IN_SOFT_RESET_MASK,
@@ -759,42 +791,98 @@ static int img_spdif_in_probe(struct platform_device *pdev)
IMG_SPDIF_IN_CTL_TRK_MASK;
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
+ pm_runtime_put(&pdev->dev);
+
ret = devm_snd_soc_register_component(&pdev->dev,
&img_spdif_in_component, &img_spdif_in_dai, 1);
if (ret)
- goto err_clk_disable;
+ goto err_suspend;
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
if (ret)
- goto err_clk_disable;
+ goto err_suspend;
return 0;
-err_clk_disable:
- clk_disable_unprepare(spdif->clk_sys);
+err_pm_put:
+ pm_runtime_put(&pdev->dev);
+err_suspend:
+ if (!pm_runtime_enabled(&pdev->dev))
+ img_spdif_in_runtime_suspend(&pdev->dev);
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
return ret;
}
static int img_spdif_in_dev_remove(struct platform_device *pdev)
{
- struct img_spdif_in *spdif = platform_get_drvdata(pdev);
+ pm_runtime_disable(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ img_spdif_in_runtime_suspend(&pdev->dev);
- clk_disable_unprepare(spdif->clk_sys);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int img_spdif_in_suspend(struct device *dev)
+{
+ struct img_spdif_in *spdif = dev_get_drvdata(dev);
+ int ret;
+
+ if (pm_runtime_status_suspended(dev)) {
+ ret = img_spdif_in_runtime_resume(dev);
+ if (ret)
+ return ret;
+ }
+
+ spdif->suspend_clkgen = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CLKGEN);
+ spdif->suspend_ctl = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
+
+ img_spdif_in_runtime_suspend(dev);
return 0;
}
+static int img_spdif_in_resume(struct device *dev)
+{
+ struct img_spdif_in *spdif = dev_get_drvdata(dev);
+ int i, ret;
+
+ ret = img_spdif_in_runtime_resume(dev);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++)
+ img_spdif_in_aclkgen_writel(spdif, i);
+
+ img_spdif_in_writel(spdif, spdif->suspend_clkgen, IMG_SPDIF_IN_CLKGEN);
+ img_spdif_in_writel(spdif, spdif->suspend_ctl, IMG_SPDIF_IN_CTL);
+
+ if (pm_runtime_status_suspended(dev))
+ img_spdif_in_runtime_suspend(dev);
+
+ return 0;
+}
+#endif
+
static const struct of_device_id img_spdif_in_of_match[] = {
{ .compatible = "img,spdif-in" },
{}
};
MODULE_DEVICE_TABLE(of, img_spdif_in_of_match);
+static const struct dev_pm_ops img_spdif_in_pm_ops = {
+ SET_RUNTIME_PM_OPS(img_spdif_in_runtime_suspend,
+ img_spdif_in_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(img_spdif_in_suspend, img_spdif_in_resume)
+};
+
static struct platform_driver img_spdif_in_driver = {
.driver = {
.name = "img-spdif-in",
- .of_match_table = img_spdif_in_of_match
+ .of_match_table = img_spdif_in_of_match,
+ .pm = &img_spdif_in_pm_ops
},
.probe = img_spdif_in_probe,
.remove = img_spdif_in_dev_remove