[PATCH v3 6/9] usb: chipidea: tegra: Support runtime PM

[Dmitry Osipenko]

Tegra PHY driver now supports waking up controller from a low power mode.
Enable runtime PM in order to put controller into the LPM during idle.

Tested-by: Matt Merhar <mattmer...@protonmail.com>
Tested-by: Nicolas Chauvet <kwiz...@gmail.com>
Tested-by: Peter Geis <pgwipe...@gmail.com>
Tested-by: Ion Agorria <i...@agorria.com>
Signed-off-by: Dmitry Osipenko <dig...@gmail.com>
---
 drivers/usb/chipidea/ci_hdrc_tegra.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/chipidea/ci_hdrc_tegra.c 
b/drivers/usb/chipidea/ci_hdrc_tegra.c
index 5fccdeeefc64..655671159511 100644
--- a/drivers/usb/chipidea/ci_hdrc_tegra.c
+++ b/drivers/usb/chipidea/ci_hdrc_tegra.c
@@ -38,21 +38,24 @@ struct tegra_usb_soc_info {
 
 static const struct tegra_usb_soc_info tegra20_ehci_soc_info = {
        .flags = CI_HDRC_REQUIRES_ALIGNED_DMA |
-                CI_HDRC_OVERRIDE_PHY_CONTROL,
+                CI_HDRC_OVERRIDE_PHY_CONTROL |
+                CI_HDRC_SUPPORTS_RUNTIME_PM,
        .dr_mode = USB_DR_MODE_HOST,
        .txfifothresh = 10,
 };
 
 static const struct tegra_usb_soc_info tegra30_ehci_soc_info = {
        .flags = CI_HDRC_REQUIRES_ALIGNED_DMA |
-                CI_HDRC_OVERRIDE_PHY_CONTROL,
+                CI_HDRC_OVERRIDE_PHY_CONTROL |
+                CI_HDRC_SUPPORTS_RUNTIME_PM,
        .dr_mode = USB_DR_MODE_HOST,
        .txfifothresh = 16,
 };
 
 static const struct tegra_usb_soc_info tegra_udc_soc_info = {
        .flags = CI_HDRC_REQUIRES_ALIGNED_DMA |
-                CI_HDRC_OVERRIDE_PHY_CONTROL,
+                CI_HDRC_OVERRIDE_PHY_CONTROL |
+                CI_HDRC_SUPPORTS_RUNTIME_PM,
        .dr_mode = USB_DR_MODE_UNKNOWN,
 };
 
@@ -323,6 +326,10 @@ static int tegra_usb_probe(struct platform_device *pdev)
        usb->data.hub_control = tegra_ehci_hub_control;
        usb->data.notify_event = tegra_usb_notify_event;
 
+       /* Tegra PHY driver currently doesn't support LPM for ULPI */
+       if (of_usb_get_phy_mode(pdev->dev.of_node) == 
USBPHY_INTERFACE_MODE_ULPI)
+               usb->data.flags &= ~CI_HDRC_SUPPORTS_RUNTIME_PM;
+
        usb->dev = ci_hdrc_add_device(&pdev->dev, pdev->resource,
                                      pdev->num_resources, &usb->data);
        if (IS_ERR(usb->dev)) {
-- 
2.29.2