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

Dmitry Osipenko
2020-12-18T12:13:04Z

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 <mattmerhar@protonmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Dmitry Osipenko <digetx@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