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Date: Wed, 12 May 2021 13:51:57 -0500
From: Nishanth Menon <nm@...com>
To: Kishon Vijay Abraham I <kishon@...com>
CC: Tero Kristo <kristo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Lokesh Vutla <lokeshvutla@...com>
Subject: Re: [PATCH 1/4] arm64: dts: ti: k3-j721e-main: Fix external refclk
input to SERDES
On 20:42-20210512, Kishon Vijay Abraham I wrote:
> Rename the external refclk inputs to the SERDES from
> dummy_cmn_refclk/dummy_cmn_refclk1 to cmn_refclk/cmn_refclk1
> respectively. Also move the external refclk DT nodes outside the
> cbass_main DT node. Since in j721e common processor board, only the
> cmn_refclk1 is connected to 100MHz clock, fix the clock frequency.
>
> Fixes: afd094ebe69f ("arm64: dts: ti: k3-j721e-main: Add WIZ and SERDES PHY nodes")
Assume we want this part of 5.13 fixes?
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> ---
> .../dts/ti/k3-j721e-common-proc-board.dts | 4 ++
> arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 58 ++++++++++---------
> 2 files changed, 34 insertions(+), 28 deletions(-)
>
> 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 60764366e22b..86f7ab511ee8 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
> @@ -635,6 +635,10 @@
> status = "disabled";
> };
>
> +&cmn_refclk1 {
> + clock-frequency = <100000000>;
> +};
> +
> &serdes0 {
> serdes0_pcie_link: link@0 {
> reg = <0>;
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> index c2aa45a3ac79..002a0c1520ee 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> @@ -8,6 +8,20 @@
> #include <dt-bindings/mux/mux.h>
> #include <dt-bindings/mux/ti-serdes.h>
>
> +/ {
> + cmn_refclk: cmn-refclk {
> + #clock-cells = <0>;
> + compatible = "fixed-clock";
> + clock-frequency = <0>;
> + };
> +
> + cmn_refclk1: cmn-refclk1 {
Just curious: why cant we use the standard nodenames with clock?
> + #clock-cells = <0>;
> + compatible = "fixed-clock";
> + clock-frequency = <0>;
> + };
> +};
> +
> &cbass_main {
> msmc_ram: sram@...00000 {
> compatible = "mmio-sram";
> @@ -336,24 +350,12 @@
> pinctrl-single,function-mask = <0xffffffff>;
> };
>
> - dummy_cmn_refclk: dummy-cmn-refclk {
> - #clock-cells = <0>;
> - compatible = "fixed-clock";
> - clock-frequency = <100000000>;
> - };
> -
> - dummy_cmn_refclk1: dummy-cmn-refclk1 {
> - #clock-cells = <0>;
> - compatible = "fixed-clock";
> - clock-frequency = <100000000>;
> - };
> -
> serdes_wiz0: wiz@...0000 {
> compatible = "ti,j721e-wiz-16g";
> #address-cells = <1>;
> #size-cells = <1>;
> power-domains = <&k3_pds 292 TI_SCI_PD_EXCLUSIVE>;
> - clocks = <&k3_clks 292 5>, <&k3_clks 292 11>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 292 5>, <&k3_clks 292 11>, <&cmn_refclk>;
> clock-names = "fck", "core_ref_clk", "ext_ref_clk";
> assigned-clocks = <&k3_clks 292 11>, <&k3_clks 292 0>;
> assigned-clock-parents = <&k3_clks 292 15>, <&k3_clks 292 4>;
> @@ -362,21 +364,21 @@
> ranges = <0x5000000 0x0 0x5000000 0x10000>;
>
> wiz0_pll0_refclk: pll0-refclk {
> - clocks = <&k3_clks 292 11>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 292 11>, <&cmn_refclk>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz0_pll0_refclk>;
> assigned-clock-parents = <&k3_clks 292 11>;
> };
>
> wiz0_pll1_refclk: pll1-refclk {
> - clocks = <&k3_clks 292 0>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 292 0>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz0_pll1_refclk>;
> assigned-clock-parents = <&k3_clks 292 0>;
> };
>
> wiz0_refclk_dig: refclk-dig {
> - clocks = <&k3_clks 292 11>, <&k3_clks 292 0>, <&dummy_cmn_refclk>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 292 11>, <&k3_clks 292 0>, <&cmn_refclk>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz0_refclk_dig>;
> assigned-clock-parents = <&k3_clks 292 11>;
> @@ -410,7 +412,7 @@
> #address-cells = <1>;
> #size-cells = <1>;
> power-domains = <&k3_pds 293 TI_SCI_PD_EXCLUSIVE>;
> - clocks = <&k3_clks 293 5>, <&k3_clks 293 13>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 293 5>, <&k3_clks 293 13>, <&cmn_refclk>;
> clock-names = "fck", "core_ref_clk", "ext_ref_clk";
> assigned-clocks = <&k3_clks 293 13>, <&k3_clks 293 0>;
> assigned-clock-parents = <&k3_clks 293 17>, <&k3_clks 293 4>;
> @@ -419,21 +421,21 @@
> ranges = <0x5010000 0x0 0x5010000 0x10000>;
>
> wiz1_pll0_refclk: pll0-refclk {
> - clocks = <&k3_clks 293 13>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 293 13>, <&cmn_refclk>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz1_pll0_refclk>;
> assigned-clock-parents = <&k3_clks 293 13>;
> };
>
> wiz1_pll1_refclk: pll1-refclk {
> - clocks = <&k3_clks 293 0>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 293 0>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz1_pll1_refclk>;
> assigned-clock-parents = <&k3_clks 293 0>;
> };
>
> wiz1_refclk_dig: refclk-dig {
> - clocks = <&k3_clks 293 13>, <&k3_clks 293 0>, <&dummy_cmn_refclk>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 293 13>, <&k3_clks 293 0>, <&cmn_refclk>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz1_refclk_dig>;
> assigned-clock-parents = <&k3_clks 293 13>;
> @@ -467,7 +469,7 @@
> #address-cells = <1>;
> #size-cells = <1>;
> power-domains = <&k3_pds 294 TI_SCI_PD_EXCLUSIVE>;
> - clocks = <&k3_clks 294 5>, <&k3_clks 294 11>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 294 5>, <&k3_clks 294 11>, <&cmn_refclk>;
> clock-names = "fck", "core_ref_clk", "ext_ref_clk";
> assigned-clocks = <&k3_clks 294 11>, <&k3_clks 294 0>;
> assigned-clock-parents = <&k3_clks 294 15>, <&k3_clks 294 4>;
> @@ -476,21 +478,21 @@
> ranges = <0x5020000 0x0 0x5020000 0x10000>;
>
> wiz2_pll0_refclk: pll0-refclk {
> - clocks = <&k3_clks 294 11>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 294 11>, <&cmn_refclk>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz2_pll0_refclk>;
> assigned-clock-parents = <&k3_clks 294 11>;
> };
>
> wiz2_pll1_refclk: pll1-refclk {
> - clocks = <&k3_clks 294 0>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 294 0>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz2_pll1_refclk>;
> assigned-clock-parents = <&k3_clks 294 0>;
> };
>
> wiz2_refclk_dig: refclk-dig {
> - clocks = <&k3_clks 294 11>, <&k3_clks 294 0>, <&dummy_cmn_refclk>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 294 11>, <&k3_clks 294 0>, <&cmn_refclk>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz2_refclk_dig>;
> assigned-clock-parents = <&k3_clks 294 11>;
> @@ -524,7 +526,7 @@
> #address-cells = <1>;
> #size-cells = <1>;
> power-domains = <&k3_pds 295 TI_SCI_PD_EXCLUSIVE>;
> - clocks = <&k3_clks 295 5>, <&k3_clks 295 9>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 295 5>, <&k3_clks 295 9>, <&cmn_refclk>;
> clock-names = "fck", "core_ref_clk", "ext_ref_clk";
> assigned-clocks = <&k3_clks 295 9>, <&k3_clks 295 0>;
> assigned-clock-parents = <&k3_clks 295 13>, <&k3_clks 295 4>;
> @@ -533,21 +535,21 @@
> ranges = <0x5030000 0x0 0x5030000 0x10000>;
>
> wiz3_pll0_refclk: pll0-refclk {
> - clocks = <&k3_clks 295 9>, <&dummy_cmn_refclk>;
> + clocks = <&k3_clks 295 9>, <&cmn_refclk>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz3_pll0_refclk>;
> assigned-clock-parents = <&k3_clks 295 9>;
> };
>
> wiz3_pll1_refclk: pll1-refclk {
> - clocks = <&k3_clks 295 0>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 295 0>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz3_pll1_refclk>;
> assigned-clock-parents = <&k3_clks 295 0>;
> };
>
> wiz3_refclk_dig: refclk-dig {
> - clocks = <&k3_clks 295 9>, <&k3_clks 295 0>, <&dummy_cmn_refclk>, <&dummy_cmn_refclk1>;
> + clocks = <&k3_clks 295 9>, <&k3_clks 295 0>, <&cmn_refclk>, <&cmn_refclk1>;
> #clock-cells = <0>;
> assigned-clocks = <&wiz3_refclk_dig>;
> assigned-clock-parents = <&k3_clks 295 9>;
> --
> 2.17.1
>
--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
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