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Date: Mon, 1 Jul 2019 13:11:13 -0600
From: Rob Herring <robh+dt@...nel.org>
To: Dmitry Osipenko <digetx@...il.com>
Cc: Michael Turquette <mturquette@...libre.com>,
Joseph Lo <josephl@...dia.com>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Peter De Schrijver <pdeschrijver@...dia.com>,
Prashant Gaikwad <pgaikwad@...dia.com>,
Stephen Boyd <sboyd@...nel.org>, devicetree@...r.kernel.org,
linux-clk <linux-clk@...r.kernel.org>,
linux-tegra@...r.kernel.org,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 07/15] dt-bindings: memory: tegra30: Convert to
Tegra124 YAML
On Sun, Jun 30, 2019 at 3:04 PM Dmitry Osipenko <digetx@...il.com> wrote:
>
"Convert" implies you delete the old binding doc.
> The Tegra30 binding will actually differ from the Tegra124 a tad, in
> particular the EMEM configuration description. Hence rename the binding
> to Tegra124 during of the conversion to YAML.
>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
> .../nvidia,tegra124-mc.yaml | 149 ++++++++++++++++++
> 1 file changed, 149 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml
>
> diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml
> new file mode 100644
> index 000000000000..d18242510295
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml
> @@ -0,0 +1,149 @@
> +# SPDX-License-Identifier: (GPL-2.0)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra124-mc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title:
> + NVIDIA Tegra124 SoC Memory Controller
> +
> +maintainers:
> + - Jon Hunter <jonathanh@...dia.com>
> + - Thierry Reding <thierry.reding@...il.com>
> +
> +description: |
> + Tegra124 SoC features a hybrid 2x32-bit / 1x64-bit memory controller.
> + These are interleaved to provide high performance with the load shared across
> + two memory channels. The Tegra124 Memory Controller handles memory requests
> + from internal clients and arbitrates among them to allocate memory bandwidth
> + for DDR3L and LPDDR3 SDRAMs.
> +
> +properties:
> + compatible:
> + const: nvidia,tegra124-mc
> +
> + reg:
> + maxItems: 1
> + description:
> + Physical base address.
> +
> + clocks:
> + maxItems: 1
> + description:
> + Memory Controller clock.
> +
> + clock-names:
> + items:
> + - const: mc
> +
> + interrupts:
> + maxItems: 1
> + description:
> + Memory Controller interrupt.
> +
> + "#reset-cells":
> + const: 1
> +
> + "#iommu-cells":
> + const: 1
> +
> +patternProperties:
> + ".*":
Please define a node name or pattern for node names.
> + properties:
> + nvidia,ram-code:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Value of RAM_CODE this timing set is used for.
> +
> + patternProperties:
> + ".*":
Same here.
> + properties:
> + clock-frequency:
> + description:
> + Memory clock rate in Hz.
No constraints? Anything from 0 to 4GHz works?
> +
> + nvidia,emem-configuration:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + description: |
> + Values to be written to the EMEM register block. See section
> + "15.6.1 MC Registers" in the TRM.
> + items:
> + - description: MC_EMEM_ARB_CFG
> + - description: MC_EMEM_ARB_OUTSTANDING_REQ
> + - description: MC_EMEM_ARB_TIMING_RCD
> + - description: MC_EMEM_ARB_TIMING_RP
> + - description: MC_EMEM_ARB_TIMING_RC
> + - description: MC_EMEM_ARB_TIMING_RAS
> + - description: MC_EMEM_ARB_TIMING_FAW
> + - description: MC_EMEM_ARB_TIMING_RRD
> + - description: MC_EMEM_ARB_TIMING_RAP2PRE
> + - description: MC_EMEM_ARB_TIMING_WAP2PRE
> + - description: MC_EMEM_ARB_TIMING_R2R
> + - description: MC_EMEM_ARB_TIMING_W2W
> + - description: MC_EMEM_ARB_TIMING_R2W
> + - description: MC_EMEM_ARB_TIMING_W2R
> + - description: MC_EMEM_ARB_DA_TURNS
> + - description: MC_EMEM_ARB_DA_COVERS
> + - description: MC_EMEM_ARB_MISC0
> + - description: MC_EMEM_ARB_MISC1
> + - description: MC_EMEM_ARB_RING1_THROTTLE
> +
> + required:
> + - clock-frequency
> + - nvidia,emem-configuration
> +
> + required:
> + - nvidia,ram-code
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
> + - clock-names
> + - "#reset-cells"
> + - "#iommu-cells"
> +
> +examples:
> + - |
> + memory-controller@...19000 {
> + compatible = "nvidia,tegra124-mc";
> + reg = <0x0 0x70019000 0x0 0x1000>;
> + clocks = <&tegra_car 32>;
> + clock-names = "mc";
> +
> + interrupts = <0 77 4>;
> +
> + #iommu-cells = <1>;
> + #reset-cells = <1>;
> +
> + emc-timings-3 {
> + nvidia,ram-code = <3>;
> +
> + timing-12750000 {
> + clock-frequency = <12750000>;
> +
> + nvidia,emem-configuration = <
> + 0x40040001 /* MC_EMEM_ARB_CFG */
> + 0x8000000a /* MC_EMEM_ARB_OUTSTANDING_REQ */
> + 0x00000001 /* MC_EMEM_ARB_TIMING_RCD */
> + 0x00000001 /* MC_EMEM_ARB_TIMING_RP */
> + 0x00000002 /* MC_EMEM_ARB_TIMING_RC */
> + 0x00000000 /* MC_EMEM_ARB_TIMING_RAS */
> + 0x00000002 /* MC_EMEM_ARB_TIMING_FAW */
> + 0x00000001 /* MC_EMEM_ARB_TIMING_RRD */
> + 0x00000002 /* MC_EMEM_ARB_TIMING_RAP2PRE */
> + 0x00000008 /* MC_EMEM_ARB_TIMING_WAP2PRE */
> + 0x00000003 /* MC_EMEM_ARB_TIMING_R2R */
> + 0x00000002 /* MC_EMEM_ARB_TIMING_W2W */
> + 0x00000003 /* MC_EMEM_ARB_TIMING_R2W */
> + 0x00000006 /* MC_EMEM_ARB_TIMING_W2R */
> + 0x06030203 /* MC_EMEM_ARB_DA_TURNS */
> + 0x000a0402 /* MC_EMEM_ARB_DA_COVERS */
> + 0x77e30303 /* MC_EMEM_ARB_MISC0 */
> + 0x70000f03 /* MC_EMEM_ARB_MISC1 */
> + 0x001f0000 /* MC_EMEM_ARB_RING1_THROTTLE */
> + >;
> + };
> + };
> + };
> --
> 2.22.0
>
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