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Message-ID: <20220620114218.fqkf6vnyxafla23z@uda0490373>
Date: Mon, 20 Jun 2022 17:12:19 +0530
From: Rahul T R <r-ravikumar@...com>
To: Nishanth Menon <nm@...com>
CC: <robh+dt@...nel.org>, <vigneshr@...com>, <kishon@...com>,
<krzysztof.kozlowski+dt@...aro.org>, <lee.jones@...aro.org>,
<rogerq@...nel.org>, <devicetree@...r.kernel.org>,
<kristo@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <s-anna@...com>,
Vijay Pothukuchi <vijayp@...com>
Subject: Re: [PATCH v4 2/3] arm64: dts: ti: k3-j721e-*: Add dts nodes for
EHRPWMs
On 21:19-20220617, Nishanth Menon wrote:
> On 15:40-20220530, Rahul T R wrote:
> > From: Vijay Pothukuchi <vijayp@...com>
> >
> > Add dts nodes for 6 EHRPWM instances on SoC
> >
> > Signed-off-by: Vijay Pothukuchi <vijayp@...com>
> > Signed-off-by: Rahul T R <r-ravikumar@...com>
> > ---
> > .../dts/ti/k3-j721e-common-proc-board.dts | 24 +++++++
> > arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 62 ++++++++++++++++++-
> > arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 24 +++++++
> > 3 files changed, 109 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
> > index 2bc26a296496..f7d02fa4d6fc 100644
> > --- a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
> > +++ b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
> > @@ -995,3 +995,27 @@
> > &main_mcan13 {
> > status = "disabled";
> > };
> > +
> > +&main_ehrpwm0 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm1 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm2 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm3 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm4 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm5 {
> > + status = "disabled";
> > +};
>
>
> Do the pwm driver croak and die OR it is un-usable on proc-board or
> disabled due to not-primary function (ideally drivers should shut things
> off when unused)?
>
Hi Nishanth,
Nodes are disabled since
EHRPWM is not primary function
and pins are configured for
different interfaces like MCASP10 etc..
> > diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> > index 43b6cf5791ee..1ee00b73905d 100644
> > --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> > +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> > @@ -66,7 +66,67 @@
> > #mux-control-cells = <1>;
> > mux-reg-masks = <0x4000 0x8000000>, /* USB0 to SERDES0/3 mux */
> > <0x4010 0x8000000>; /* USB1 to SERDES1/2 mux */
> > - };
> > + };
> > +
> > + ehrpwm_tbclk: clock-controller@...0 {
> > + compatible = "ti,am654-ehrpwm-tbclk", "syscon";
> > + reg = <0x4140 0x18>;
> > + #clock-cells = <1>;
> > + };
> > + };
> > +
> > + main_ehrpwm0: pwm@...0000 {
> > + compatible = "ti,am654-ehrpwm", "ti,am3352-ehrpwm";
> > + #pwm-cells = <3>;
> > + reg = <0x0 0x3000000 0x0 0x100>;
>
> would suggest 0x00 instead of 0x0
will fix this in the respin
Regards
Rahul T R
>
> > + power-domains = <&k3_pds 83 TI_SCI_PD_EXCLUSIVE>;
> > + clocks = <&ehrpwm_tbclk 0>, <&k3_clks 83 0>;
> > + clock-names = "tbclk", "fck";
> > + };
> > +
> > + main_ehrpwm1: pwm@...0000 {
> > + compatible = "ti,am654-ehrpwm", "ti,am3352-ehrpwm";
> > + #pwm-cells = <3>;
> > + reg = <0x0 0x3010000 0x0 0x100>;
> > + power-domains = <&k3_pds 84 TI_SCI_PD_EXCLUSIVE>;
> > + clocks = <&ehrpwm_tbclk 1>, <&k3_clks 84 0>;
> > + clock-names = "tbclk", "fck";
> > + };
> > +
> > + main_ehrpwm2: pwm@...0000 {
> > + compatible = "ti,am654-ehrpwm", "ti,am3352-ehrpwm";
> > + #pwm-cells = <3>;
> > + reg = <0x0 0x3020000 0x0 0x100>;
> > + power-domains = <&k3_pds 85 TI_SCI_PD_EXCLUSIVE>;
> > + clocks = <&ehrpwm_tbclk 2>, <&k3_clks 85 0>;
> > + clock-names = "tbclk", "fck";
> > + };
> > +
> > + main_ehrpwm3: pwm@...0000 {
> > + compatible = "ti,am654-ehrpwm", "ti,am3352-ehrpwm";
> > + #pwm-cells = <3>;
> > + reg = <0x0 0x3030000 0x0 0x100>;
> > + power-domains = <&k3_pds 86 TI_SCI_PD_EXCLUSIVE>;
> > + clocks = <&ehrpwm_tbclk 3>, <&k3_clks 86 0>;
> > + clock-names = "tbclk", "fck";
> > + };
> > +
> > + main_ehrpwm4: pwm@...0000 {
> > + compatible = "ti,am654-ehrpwm", "ti,am3352-ehrpwm";
> > + #pwm-cells = <3>;
> > + reg = <0x0 0x3040000 0x0 0x100>;
> > + power-domains = <&k3_pds 87 TI_SCI_PD_EXCLUSIVE>;
> > + clocks = <&ehrpwm_tbclk 4>, <&k3_clks 87 0>;
> > + clock-names = "tbclk", "fck";
> > + };
> > +
> > + main_ehrpwm5: pwm@...0000 {
> > + compatible = "ti,am654-ehrpwm", "ti,am3352-ehrpwm";
> > + #pwm-cells = <3>;
> > + reg = <0x0 0x3050000 0x0 0x100>;
> > + power-domains = <&k3_pds 88 TI_SCI_PD_EXCLUSIVE>;
> > + clocks = <&ehrpwm_tbclk 5>, <&k3_clks 88 0>;
> > + clock-names = "tbclk", "fck";
> > };
> >
> > gic500: interrupt-controller@...0000 {
> > diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> > index 80358cba6954..98a55778f3fe 100644
> > --- a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> > +++ b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> > @@ -1129,3 +1129,27 @@
> > memory-region = <&c71_0_dma_memory_region>,
> > <&c71_0_memory_region>;
> > };
> > +
> > +&main_ehrpwm0 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm1 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm2 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm3 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm4 {
> > + status = "disabled";
> > +};
> > +
> > +&main_ehrpwm5 {
> > + status = "disabled";
> > +};
> > --
> > 2.17.1
> >
>
> --
> Regards,
> Nishanth Menon
> Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
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