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usb: gadget: tegra: Reduce pad power

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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>
This commit is contained in:
Jim Lin 2022-08-16 16:23:53 +08:00 committed by Greg Kroah-Hartman
parent 77bfa0fc75
commit a88520bfc0
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/gadget/udc/tegra-xudc.c
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@ -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);