[PATCH v1 0/4] Fine tune USB 3.0 PHY on exynos5420

Vivek Gautam gautam.vivek at samsung.com
Fri Jun 6 05:12:11 PDT 2014

The RFC version of this series was posted long time back, around December
last year [1].
This series is based on Heikki's patches for simpliefied phy lookup table:
[PATCHv2 0/6] phy: simplified phy lookup [2], applied against 'usb-next'
branch of Greg's usb tree.
Tested on peach-pit boards with SuperSpeed devices and confirmed that now
the devices are detected as SupedSpeed, not as HighSpeed.

Explanation for the need of this patch-series:
"The DWC3-exynos eXtensible host controller present on Exynos5420
SoC is quirky. The PHY serving this controller operates at High-Speed
by default, so it detects even Super-speed devices as high-speed ones.
Certain PHY parameters like Tx LOS levels and Boost levels need to be
calibrated further post initialization of xHCI controller, to get
SuperSpeed operations working."

[1] https://lkml.org/lkml/2013/12/10/365
[2] https://lkml.org/lkml/2014/6/5/358

Vivek Gautam (4):
  phy: Add provision for calibrating phy.
  usb: host: xhci-plat: Add support to get PHYs
  usb: host: xhci-plat: Caibrate PHY post host reset
  phy: exynos5-usbdrd: Calibrate LOS levels for exynos5420/5800

 drivers/phy/phy-core.c           |   36 ++++++++
 drivers/phy/phy-exynos5-usbdrd.c |  168 ++++++++++++++++++++++++++++++++++++++
 drivers/usb/host/xhci-plat.c     |   74 ++++++++++++++++-
 drivers/usb/host/xhci.h          |    3 +
 include/linux/phy/phy.h          |    7 ++
 5 files changed, 286 insertions(+), 2 deletions(-)


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