From: Jim Lin <jilin@nvidia.com>
To: <jckuo@nvidia.com>, <thierry.reding@gmail.com>, <jonathanh@nvidia.com>
Cc: <vkoul@kernel.org>, <balbi@kernel.org>,
<gregkh@linuxfoundation.org>, <jilin@nvidia.com>,
<bhsieh@nvidia.com>, <linux-phy@lists.infradead.org>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-usb@vger.kernel.org>
Subject: [PATCH v2 2/2] usb: gadget: tegra: Reduce pad power
Date: Tue, 16 Aug 2022 16:23:53 +0800 [thread overview]
Message-ID: <20220816082353.13390-3-jilin@nvidia.com> (raw)
In-Reply-To: <20220816082353.13390-1-jilin@nvidia.com>
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>
---
v2: update copyright year
drivers/usb/gadget/udc/tegra-xudc.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c
index 43f1b0d461c1..e59f19be6327 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.
*/
@@ -703,6 +703,8 @@ 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);
@@ -757,6 +759,8 @@ 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);
--
2.17.1
prev parent reply other threads:[~2022-08-16 9:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-16 8:23 [PATCH v2 0/2] usb: tegra: power down UTMI pad Jim Lin
2022-08-16 8:23 ` [PATCH v2 1/2] phy: tegra: xusb: add utmi pad power on/down ops Jim Lin
2022-09-04 14:45 ` Vinod Koul
2022-09-06 2:43 ` JC Kuo
2022-09-13 14:34 ` Vinod Koul
2022-09-14 2:59 ` JC Kuo
2022-09-20 6:33 ` Vinod Koul
2022-08-16 8:23 ` Jim Lin [this message]
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