Commit a88520bf authored by Jim Lin's avatar Jim Lin Committed by Greg Kroah-Hartman
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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: default avatarJim Lin <jilin@nvidia.com>
Link: https://lore.kernel.org/r/20220816082353.13390-3-jilin@nvidia.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 77bfa0fc

drivers/usb/gadget/udc/tegra-xudc.c

+5 −1
Original line number Diff line number Diff line
@@ -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);