openwrt/target/linux/layerscape/patches-5.4/820-usb-0018-MLK-18794-1-usb-host-xhci-add-.bus_suspend-override.patch
Yangbo Lu cddd459140 layerscape: add patches-5.4
Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release
which was tagged LSDK-20.04-V5.4.
https://source.codeaurora.org/external/qoriq/qoriq-components/linux/

For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in
LSDK, port the dts patches from 4.14.

The patches are sorted into the following categories:
  301-arch-xxxx
  302-dts-xxxx
  303-core-xxxx
  701-net-xxxx
  801-audio-xxxx
  802-can-xxxx
  803-clock-xxxx
  804-crypto-xxxx
  805-display-xxxx
  806-dma-xxxx
  807-gpio-xxxx
  808-i2c-xxxx
  809-jailhouse-xxxx
  810-keys-xxxx
  811-kvm-xxxx
  812-pcie-xxxx
  813-pm-xxxx
  814-qe-xxxx
  815-sata-xxxx
  816-sdhc-xxxx
  817-spi-xxxx
  818-thermal-xxxx
  819-uart-xxxx
  820-usb-xxxx
  821-vfio-xxxx

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
2020-05-07 12:53:06 +02:00

46 lines
1.6 KiB
Diff

From b5c498026a95f9d80be23711dd6c178cc78d6c33 Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@nxp.com>
Date: Wed, 15 Aug 2018 14:59:55 +0800
Subject: [PATCH] MLK-18794-1 usb: host: xhci: add .bus_suspend override
Some platforms (eg: Cadence USB3) have special requirements to add
platform USB register setting between xhci_bus_suspend and
platform USB controller suspend routine. Eg, The Cadence USB3 needs
RX detect clock switch from 24Mhz to 32Khz within 100ms after set
port to U3, but sometimes, for USB3 HUB connection, the USB2
bus suspend will cost more than 100ms, and introduce the disconnection
before the PHY enters low power mode, then the state is in mess from
controller side.
So in this commit, we introduce .bus_suspend for xhci_driver_overrides
for above use cases.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
(cherry picked from commit f6baa57913ceb40da14a945820cb87e8d6ceb7c7)
---
drivers/usb/host/xhci.c | 2 ++
drivers/usb/host/xhci.h | 1 +
2 files changed, 3 insertions(+)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -5369,6 +5369,8 @@ void xhci_init_driver(struct hc_driver *
drv->reset = over->reset;
if (over->start)
drv->start = over->start;
+ if (over->bus_suspend)
+ drv->bus_suspend = over->bus_suspend;
}
}
EXPORT_SYMBOL_GPL(xhci_init_driver);
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1910,6 +1910,7 @@ struct xhci_driver_overrides {
size_t extra_priv_size;
int (*reset)(struct usb_hcd *hcd);
int (*start)(struct usb_hcd *hcd);
+ int (*bus_suspend)(struct usb_hcd *hcd);
};
#define XHCI_CFC_DELAY 10