From: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
To: Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: John Youn <John.Youn@synopsys.com>,
Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Subject: [PATCH v2 10/12] usb: dwc2: Add clock gating entering flow by system suspend
Date: Tue, 13 Apr 2021 11:37:15 +0400 [thread overview]
Message-ID: <20210413073716.30C13A0094@mailhost.synopsys.com> (raw)
In-Reply-To: <cover.1618297800.git.Arthur.Petrosyan@synopsys.com>
If not hibernation nor partial power down are supported,
clock gating is used to save power.
Adds a new flow of entering clock gating when PC is
suspended.
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
---
Changes in v2:
- None
drivers/usb/dwc2/hcd.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 31d6a1b87228..09dcd37b9ef8 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -4372,6 +4372,15 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
break;
case DWC2_POWER_DOWN_PARAM_HIBERNATION:
case DWC2_POWER_DOWN_PARAM_NONE:
+ /*
+ * If not hibernation nor partial power down are supported,
+ * clock gating is used to save power.
+ */
+ dwc2_host_enter_clock_gating(hsotg);
+
+ /* After entering suspend, hardware is not accessible */
+ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ break;
default:
goto skip_power_saving;
}
--
2.25.1
next prev parent reply other threads:[~2021-04-13 7:37 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1618297800.git.Arthur.Petrosyan@synopsys.com>
2021-04-13 7:16 ` [PATCH 01/12] usb: dwc2: Add device clock gating support functions Artur Petrosyan
2021-04-13 7:16 ` [PATCH 02/12] usb: dwc2: Add host " Artur Petrosyan
2021-04-13 7:16 ` [PATCH 03/12] usb: dwc2: Allow entering clock gating from USB_SUSPEND interrupt Artur Petrosyan
2021-04-13 9:25 ` Sergei Shtylyov
2021-04-13 7:16 ` [PATCH 04/12] usb: dwc2: Add exit clock gating from wakeup interrupt Artur Petrosyan
2021-04-13 7:16 ` [PATCH 05/12] usb: dwc2: Add exit clock gating from session request interrupt Artur Petrosyan
2021-04-13 7:16 ` [PATCH 06/12] usb: dwc2: Add exit clock gating when port reset is asserted Artur Petrosyan
2021-04-13 7:17 ` [PATCH 07/12] usb: dwc2: Update enter clock gating when port is suspended Artur Petrosyan
2021-04-13 9:22 ` Sergei Shtylyov
2021-04-13 10:24 ` Greg Kroah-Hartman
2021-04-13 7:17 ` [PATCH 08/12] usb: dwc2: Update exit clock gating when port is resumed Artur Petrosyan
2021-04-13 7:17 ` [PATCH 09/12] usb: dwc2: Allow exit clock gating in urb enqueue Artur Petrosyan
2021-04-13 7:17 ` [PATCH 10/12] usb: dwc2: Add clock gating entering flow by system suspend Artur Petrosyan
2021-04-13 7:17 ` [PATCH 11/12] usb: dwc2: Add clock gating exiting flow by system resume Artur Petrosyan
2021-04-13 7:17 ` [PATCH 12/12] usb: dwc2: Add exit clock gating before removing driver Artur Petrosyan
2021-04-13 7:36 ` [PATCH v2 01/12] usb: dwc2: Add device clock gating support functions Artur Petrosyan
2021-04-13 7:36 ` [PATCH v2 02/12] usb: dwc2: Add host " Artur Petrosyan
2021-04-13 7:36 ` [PATCH v2 03/12] usb: dwc2: Allow entering clock gating from USB_SUSPEND interrupt Artur Petrosyan
2021-04-13 7:36 ` [PATCH v2 04/12] usb: dwc2: Add exit clock gating from wakeup interrupt Artur Petrosyan
2021-04-13 7:36 ` [PATCH v2 05/12] usb: dwc2: Add exit clock gating from session request interrupt Artur Petrosyan
2021-04-13 7:36 ` [PATCH v2 06/12] usb: dwc2: Add exit clock gating when port reset is asserted Artur Petrosyan
2021-04-13 7:36 ` [PATCH v2 07/12] usb: dwc2: Update enter clock gating when port is suspended Artur Petrosyan
2021-04-13 7:37 ` [PATCH v2 08/12] usb: dwc2: Update exit clock gating when port is resumed Artur Petrosyan
2021-04-13 7:37 ` [PATCH v2 09/12] usb: dwc2: Allow exit clock gating in urb enqueue Artur Petrosyan
2021-04-13 7:37 ` Artur Petrosyan [this message]
2021-04-13 9:29 ` [PATCH v2 10/12] usb: dwc2: Add clock gating entering flow by system suspend Sergei Shtylyov
2021-04-13 7:37 ` [PATCH v2 11/12] usb: dwc2: Add clock gating exiting flow by system resume Artur Petrosyan
2021-04-13 9:30 ` Sergei Shtylyov
2021-04-13 7:37 ` [PATCH v2 12/12] usb: dwc2: Add exit clock gating before removing driver Artur Petrosyan
[not found] ` <20210413073600.57846A0094@mailhost.synopsys.com>
2021-04-13 8:03 ` [PATCH v2 00/12] usb: dwc2: Add clock gating support Artur Petrosyan
2021-04-13 10:26 ` Greg Kroah-Hartman
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