On Thu, Oct 30, 2014 at 06:08:45PM +0800, Huang Rui wrote: > HIRD threshold should be configurable by different platforms. > > From DesignWare databook: > When HIRD_Threshold[4] is set to 1b1 and HIRD value is greater than or > equal to the value in HIRD_Threshold[3:0], dwc3 asserts output signals > utmi_l1_suspend_n to put PHY into Deep Low-Power mode in L1. > > When HIRD_Threshold[4] is set to 1b0 or the HIRD value is less than > HIRD_Threshold[3:0], dwc3 asserts output signals utmi_sleep_n on L1. > > Signed-off-by: Huang Rui <ray.hu...@amd.com> > --- > Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++ > drivers/usb/dwc3/core.c | 17 +++++++++++++++++ > drivers/usb/dwc3/core.h | 6 ++++++ > drivers/usb/dwc3/gadget.c | 6 +----- > drivers/usb/dwc3/platform_data.h | 3 +++ > 5 files changed, 30 insertions(+), 5 deletions(-) > > diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt > b/Documentation/devicetree/bindings/usb/dwc3.txt > index feaf2c8..5b99755 100644 > --- a/Documentation/devicetree/bindings/usb/dwc3.txt > +++ b/Documentation/devicetree/bindings/usb/dwc3.txt > @@ -34,6 +34,9 @@ Optional properties: > LTSSM during USB3 Compliance mode. > - snps,dis_u3_susphy_quirk: when set core will disable USB3 suspend phy. > - snps,dis_u2_susphy_quirk: when set core will disable USB2 suspend phy. > + - snps,is-utmi-l1-suspend: true when DWC3 asserts output signal > + utmi_l1_suspend_n, false when asserts utmi_sleep_n > + - snps,hird-threshold: HIRD threshold > > This is usually a subnode to DWC3 glue to which it is connected. > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index a28ed1c..f4172ab 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -729,6 +729,7 @@ static int dwc3_probe(struct platform_device *pdev) > struct dwc3 *dwc; > u8 lpm_nyet_threshold; > u8 tx_de_emphasis; > + u8 hird_threshold; > > int ret; > > @@ -790,12 +791,22 @@ static int dwc3_probe(struct platform_device *pdev) > /* default to -3.5dB de-emphasis */ > tx_de_emphasis = 1; > > + /* > + * defalut to assert utmi_sleep_n and use maximum allowed HIRD
default -- balbi
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