On Wed, Jul 12, 2017 at 03:06:48PM +0700, Thang Q. Nguyen wrote: > XHCI specification 1.1 does not require xHCI-compliant controllers > to always enable hardware USB2 LPM. However, the current xHCI > driver always enable it when seeing HLC=1. > This patch supports an option for users to control disabling > USB2 Hardware LPM via DT/ACPI attribute. > This option is needed in case user would like to disable this > feature. For example, their xHCI controller has its USB2 HW LPM > broken. > > Signed-off-by: Tung Nguyen <tunguyen@xxxxxxx> > Signed-off-by: Thang Q. Nguyen <tqnguyen@xxxxxxx> > --- > Changes since v3: > - Bypass updating LPM parameters when HW LPM is optionally disabled. > Changes since v2: > - Change code to disable HW LPM as an option for user which > is set via ACPI/DT. > Changes since v1: > - Update DT/ACPI attribute and corresponding codes from HLE to LPM to > be consistent with other attribute names. > --- > Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 + I acked v3. Please add acks when posting new versions. > drivers/usb/host/xhci-plat.c | 3 +++ > drivers/usb/host/xhci.c | 6 ++++++ > drivers/usb/host/xhci.h | 1 + > 4 files changed, 11 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
