Add runtime pm support for imx, only imx6 series are supported and tested.
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 106 ++++++++++++++++++++++++++++++++++---
1 file changed, 100 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index 353989e..5ad85fe 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -25,6 +25,7 @@
struct ci_hdrc_imx_platform_flag {
unsigned int flags;
+ bool runtime_pm;
};
static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
@@ -34,9 +35,24 @@ static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
.flags = CI_HDRC_IMX28_WRITE_FIX,
};
+static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
+ .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
+};
+
+static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
+ .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
+};
+
+static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
+ .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
+};
+
static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
+ { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
+ { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
+ { .compatible = "fsl,imx6sx-usb", .data = &imx6sl_usb_data},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
@@ -46,6 +62,8 @@ struct ci_hdrc_imx_data {
struct platform_device *ci_pdev;
struct clk *clk;
struct imx_usbmisc_data *usbmisc_data;
+ bool supports_runtime_pm;
+ bool in_lpm;
};
/* Common functions shared by usbmisc drivers */
@@ -144,6 +162,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
pdata.usb_phy = data->phy;
pdata.flags |= imx_platform_flag->flags;
+ if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
+ data->supports_runtime_pm = true;
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
@@ -174,8 +194,10 @@ 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);
+ if (data->supports_runtime_pm) {
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ }
return 0;
@@ -190,14 +212,18 @@ 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);
+ if (data->supports_runtime_pm) {
+ pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+ }
ci_hdrc_remove_device(data->ci_pdev);
clk_disable_unprepare(data->clk);
return 0;
}
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
static int imx_controller_suspend(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
@@ -205,6 +231,7 @@ static int imx_controller_suspend(struct device *dev)
dev_dbg(dev, "at %s\n", __func__);
clk_disable_unprepare(data->clk);
+ data->in_lpm = true;
return 0;
}
@@ -212,25 +239,92 @@ static int imx_controller_suspend(struct device *dev)
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__);
- return clk_prepare_enable(data->clk);
+ if (!data->in_lpm) {
+ WARN_ON(1);
+ return 0;
+ }
+
+ ret = clk_prepare_enable(data->clk);
+ if (ret)
+ return ret;
+
+ data->in_lpm = false;
+
+ ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
+ if (ret) {
+ dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
+ goto clk_disable;
+ }
+
+ return 0;
+
+clk_disable:
+ clk_disable_unprepare(data->clk);
+ return ret;
}
+#ifdef CONFIG_PM_SLEEP
static int ci_hdrc_imx_suspend(struct device *dev)
{
+ struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
+
+ if (data->in_lpm)
+ /* The core's suspend doesn't run */
+ return 0;
+
return imx_controller_suspend(dev);
}
static int ci_hdrc_imx_resume(struct device *dev)
{
- return imx_controller_resume(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 */
+static int ci_hdrc_imx_runtime_suspend(struct device *dev)
+{
+ struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ if (data->in_lpm) {
+ WARN_ON(1);
+ return 0;
+ }
+
+ ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
+ if (ret) {
+ dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
+ return ret;
+ }
+
+ return imx_controller_suspend(dev);
+}
+
+static int ci_hdrc_imx_runtime_resume(struct device *dev)
+{
+ return imx_controller_resume(dev);
+}
+
+#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 struct platform_driver ci_hdrc_imx_driver = {
.probe = ci_hdrc_imx_probe,
--
1.9.1
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