Add system and runtime power management support for imx gluy layer.
Signed-off-by: Peter Chen <peter.c...@freescale.com>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 99 ++++++++++++++++++++++++++++++++++-
1 files changed, 96 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c
b/drivers/usb/chipidea/ci_hdrc_imx.c
index 023d3cb..9f66f93 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -28,6 +28,8 @@ struct ci_hdrc_imx_data {
struct platform_device *ci_pdev;
struct clk *clk;
struct imx_usbmisc_data *usbmisc_data;
+ atomic_t in_lpm;
+ bool supports_runtime_pm;
};
/* Common functions shared by usbmisc drivers */
@@ -82,6 +84,7 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
CI_HDRC_DISABLE_STREAMING,
};
int ret;
+ struct device_node *np = pdev->dev.of_node;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
@@ -115,6 +118,11 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
pdata.phy = data->phy;
+ if (of_find_property(np, "supports_runtime_pm", NULL)) {
+ pdata.flags |= CI_HDRC_SUPPORTS_RUNTIME_PM;
+ data->supports_runtime_pm = true;
+ }
+
if (!pdev->dev.dma_mask)
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
if (!pdev->dev.coherent_dma_mask)
@@ -151,8 +159,12 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data);
- pm_runtime_no_callbacks(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
+ device_set_wakeup_capable(&pdev->dev, true);
+
+ if (data->supports_runtime_pm) {
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ }
return 0;
@@ -167,13 +179,93 @@ static int ci_hdrc_imx_remove(struct platform_device
*pdev)
{
struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
- pm_runtime_disable(&pdev->dev);
ci_hdrc_remove_device(data->ci_pdev);
+ if (data->supports_runtime_pm) {
+ pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+ }
+ clk_disable_unprepare(data->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int imx_controller_suspend(struct device *dev)
+{
+ struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "at %s\n", __func__);
+
+ if (atomic_read(&data->in_lpm))
+ return 0;
+
clk_disable_unprepare(data->clk);
+ atomic_set(&data->in_lpm, 1);
+
return 0;
}
+static int imx_controller_resume(struct device *dev)
+{
+ struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
+ int ret = 0;
+
+ dev_dbg(dev, "at %s\n", __func__);
+
+ if (!atomic_read(&data->in_lpm))
+ return 0;
+
+ ret = clk_prepare_enable(data->clk);
+ if (ret)
+ return ret;
+
+ atomic_set(&data->in_lpm, 0);
+
+ return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ci_hdrc_imx_suspend(struct device *dev)
+{
+ return imx_controller_suspend(dev);
+}
+
+static int ci_hdrc_imx_resume(struct device *dev)
+{
+ struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ ret = imx_controller_resume(dev);
+ if (!ret && data->supports_runtime_pm) {
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ }
+
+ return ret;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM_RUNTIME
+static int ci_hdrc_imx_runtime_suspend(struct device *dev)
+{
+ return imx_controller_suspend(dev);
+}
+
+static int ci_hdrc_imx_runtime_resume(struct device *dev)
+{
+ return imx_controller_resume(dev);
+}
+#endif /* CONFIG_PM_RUNTIME */
+
+#endif /* CONFIG_PM */
+static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
+ SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
+ ci_hdrc_imx_runtime_resume, NULL)
+};
static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
{ .compatible = "fsl,imx27-usb", },
{ /* sentinel */ }
@@ -187,6 +279,7 @@ static struct platform_driver ci_hdrc_imx_driver = {
.name = "imx_usb",
.owner = THIS_MODULE,
.of_match_table = ci_hdrc_imx_dt_ids,
+ .pm = &ci_hdrc_imx_pm_ops,
},
};
--
1.7.1
--
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