Subject: RE: [PATCH v9] arm64: dts: qcom: sc7180: Add WCN3990 WLAN module device node

From: <[email-masked]>
Date: Wed, 20 May 2020 00:20:36 +0530

Hi Evan,

> -----Original Message-----
> From: Evan Green <[email-masked]>
> Sent: Tuesday, May 19, 2020 10:58 PM
> To: Rakesh Pillai <[email-masked]>
> Cc: open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
> <[email-masked]>; linux-arm Mailing List <linux-arm-
> [email-masked]>; LKML <[email-masked]>; linux-
> arm-msm <[email-masked]>
> Subject: Re: [PATCH v9] arm64: dts: qcom: sc7180: Add WCN3990 WLAN
> module device node
> 
> On Sun, May 17, 2020 at 3:47 AM Rakesh Pillai <[email-masked]>
> wrote:
> >
> > Add device node for the ath10k SNOC platform driver probe
> > and add resources required for WCN3990 on sc7180 soc.
> >
> > Signed-off-by: Rakesh Pillai <[email-masked]>
> > ---
> > Changes from v8:
> > - Removed the qcom,msa-fixed-perm
> > ---
> >  arch/arm64/boot/dts/qcom/sc7180-idp.dts |  7 +++++++
> >  arch/arm64/boot/dts/qcom/sc7180.dtsi    | 27
> +++++++++++++++++++++++++++
> >  2 files changed, 34 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> > index 4e9149d..38b102e 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> > @@ -389,6 +389,13 @@
> >         };
> >  };
> >
> > +&wifi {
> > +       status = "okay";
> > +       wifi-firmware {
> > +               iommus = <&apps_smmu 0xc2 0x1>;
> > +       };
> > +};
> > +
> >  /* PINCTRL - additions to nodes defined in sc7180.dtsi */
> >
> >  &qspi_clk {
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > index f1280e0..dd4e095 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> > @@ -63,6 +63,11 @@
> >                         clock-frequency = <32764>;
> >                         #clock-cells = <0>;
> >                 };
> > +
> > +               wlan_fw_mem: memory@94100000 {
> > +                       reg = <0 0x94100000 0 0x200000>;
> > +                       no-map;
> > +               };
> 
> This node is not in the right place. Up through v8, this lived inside
> reserved-memory. Here it seems to apply into the clocks {} node, which
> is not the right spot.

Thanks for spotting this. This was a rebase problem.
I will post the next patchset by fixing this.

> 
> 
> >         };
> >
> >         reserved_memory: reserved-memory {
> > @@ -944,6 +949,28 @@
> >                         };
> >                 };
> >
> > +               wifi: wifi@18800000 {
> > +                       compatible = "qcom,wcn3990-wifi";
> > +                       reg = <0 0x18800000 0 0x800000>;
> > +                       reg-names = "membase";
> > +                       iommus = <&apps_smmu 0xc0 0x1>;
> > +                       interrupts =
> > +                               <GIC_SPI 414 IRQ_TYPE_LEVEL_HIGH /* CE0 */ >,
> > +                               <GIC_SPI 415 IRQ_TYPE_LEVEL_HIGH /* CE1 */ >,
> > +                               <GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH /* CE2 */ >,
> > +                               <GIC_SPI 417 IRQ_TYPE_LEVEL_HIGH /* CE3 */ >,
> > +                               <GIC_SPI 418 IRQ_TYPE_LEVEL_HIGH /* CE4 */ >,
> > +                               <GIC_SPI 419 IRQ_TYPE_LEVEL_HIGH /* CE5 */ >,
> > +                               <GIC_SPI 420 IRQ_TYPE_LEVEL_HIGH /* CE6 */ >,
> > +                               <GIC_SPI 421 IRQ_TYPE_LEVEL_HIGH /* CE7 */ >,
> > +                               <GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH /* CE8 */ >,
> > +                               <GIC_SPI 423 IRQ_TYPE_LEVEL_HIGH /* CE9 */ >,
> > +                               <GIC_SPI 424 IRQ_TYPE_LEVEL_HIGH /* CE10 */>,
> > +                               <GIC_SPI 425 IRQ_TYPE_LEVEL_HIGH /* CE11 */>;
> > +                       memory-region = <&wlan_fw_mem>;
> 
> Should any of the *-supply regulators be specified? Or are they all
> board specific? Or just not needed? The example has these:
> vdd-0.8-cx-mx-supply = <&pm8998_l5>;
> vdd-1.8-xo-supply = <&vreg_l7a_1p8>;
> vdd-1.3-rfa-supply = <&vreg_l17a_1p3>;
> vdd-3.3-ch0-supply = <&vreg_l25a_3p3>;

These votes are optional and were required for older targets.
We do not need these proxy votes in host now.

> 
> 
> 
> > +                       status = "disabled";
> > +               };
> > +
> >                 config_noc: interconnect@1500000 {
> >                         compatible = "qcom,sc7180-config-noc";
> >                         reg = <0 0x01500000 0 0x28000>;
> > --
> > 2.7.4

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