> On 5/12/20 6:45 PM, Rob Herring wrote: > > On Thu, May 07, 2020 at 09:34:35PM +0200, ansuelsmth@xxxxxxxxx > wrote: > >>> On Fri, May 01, 2020 at 12:06:15AM +0200, Ansuel Smith wrote: > >>>> It is now supported the editing of Tx De-Emphasis, Tx Swing and > >>>> Rx equalization params on ipq8064. Document this new optional > params. > >>>> > >>>> Signed-off-by: Ansuel Smith <ansuelsmth@xxxxxxxxx> > >>>> --- > >>>> .../devicetree/bindings/pci/qcom,pcie.txt | 36 > +++++++++++++++++++ > >>>> 1 file changed, 36 insertions(+) > >>>> > >>>> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.txt > >>> b/Documentation/devicetree/bindings/pci/qcom,pcie.txt > >>>> index 6efcef040741..8cc5aea8a1da 100644 > >>>> --- a/Documentation/devicetree/bindings/pci/qcom,pcie.txt > >>>> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.txt > >>>> @@ -254,6 +254,42 @@ > >>>> - "perst-gpios" PCIe endpoint reset signal line > >>>> - "wake-gpios" PCIe endpoint wake signal line > >>>> > >>>> +- qcom,tx-deemph-gen1: > >>>> + Usage: optional (available for ipq/apq8064) > >>>> + Value type: <u32> > >>>> + Definition: Gen1 De-emphasis value. > >>>> + For ipq806x should be set to 24. > >>> > >>> Unless these need to be tuned per board, then the compatible string > for > >>> ipq806x should imply all these settings. > >>> > >> > >> It was requested by v2 to make this settings tunable. These don't change > are > >> all the same for every ipq806x SoC. The original implementation had this > >> value hardcoded for ipq806x. Should I restore this and drop this patch? > > > > Yes, please. > > I still think that the values for tx deemph and tx swing should be > tunable. But I can live with them in the driver if they not break > support for apq8064. > > The default values in the registers for apq8064 and ipq806x are: > > default your change > TX_DEEMPH_GEN1 21 24 > TX_DEEMPH_GEN2_3_5DB 21 24 > TX_DEEMPH_GEN2_6DB 32 34 > > TX_SWING_FULL 121 120 > TX_SWING_LOW 121 120 > > So until now (without your change) apq8064 worked with default values. > I will limit this to ipq8064(-v2) if this could be a problem. > > > > Rob > > > > -- > regards, > Stan
