diff options
| author |   Jim Lin <jilin@nvidia.com> | 2022-08-16 16:23:53 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-19 11:10:08 +0200 |
| commit | a88520bfc0ec829973f92b7a1ab0f64eb9a20724 (patch) | |
| tree | 264811fc91fa13f714c127b5de98063caa989526 /drivers/usb/gadget | |
| parent | phy: tegra: xusb: add utmi pad power on/down ops (diff) | |
| download | wireguard-linux-a88520bfc0ec829973f92b7a1ab0f64eb9a20724.tar.xz wireguard-linux-a88520bfc0ec829973f92b7a1ab0f64eb9a20724.zip | |
usb: gadget: tegra: Reduce pad power
Program USB2 UTMI pad PD controls during port connect/disconnect.
Power down pad after disconnected to save power.
Signed-off-by: Jim Lin <jilin@nvidia.com>
Link: https://lore.kernel.org/r/20220816082353.13390-3-jilin@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/udc/tegra-xudc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c index 3c37effdfa64..76919d7570d2 100644 --- a/drivers/usb/gadget/udc/tegra-xudc.c +++ b/drivers/usb/gadget/udc/tegra-xudc.c @@ -2,7 +2,7 @@ /* * NVIDIA Tegra XUSB device mode controller * - * Copyright (c) 2013-2019, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2013-2022, NVIDIA CORPORATION. All rights reserved. * Copyright (c) 2015, Google Inc. */ @@ -702,6 +702,8 @@ static void tegra_xudc_device_mode_on(struct tegra_xudc *xudc) pm_runtime_get_sync(xudc->dev); + tegra_phy_xusb_utmi_pad_power_on(xudc->curr_utmi_phy); + err = phy_power_on(xudc->curr_utmi_phy); if (err < 0) dev_err(xudc->dev, "UTMI power on failed: %d\n", err); @@ -756,6 +758,8 @@ static void tegra_xudc_device_mode_off(struct tegra_xudc *xudc) /* Make sure interrupt handler has completed before powergating. */ synchronize_irq(xudc->irq); + tegra_phy_xusb_utmi_pad_power_down(xudc->curr_utmi_phy); + err = phy_power_off(xudc->curr_utmi_phy); if (err < 0) dev_err(xudc->dev, "UTMI PHY power off failed: %d\n", err); |