linux-kernel - Re: [PATCH v2 2/6] dt-bindings: memory: tegra: Add Tegra234 support

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Date:   Sun, 12 Dec 2021 19:46:06 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Jon Hunter <jonathanh@...dia.com>, linux-tegra@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v2 2/6] dt-bindings: memory: tegra: Add Tegra234 support

On 10/12/2021 17:47, Thierry Reding wrote:
> From: Thierry Reding <treding@...dia.com>
> 
> Document the variant of the memory controller and external memory
> controllers found on Tegra234 and add some memory client and SMMU
> stream ID definitions for use in device tree files.
> 
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Thierry Reding <treding@...dia.com>
> ---
> Changes in v2:
> - conditionally set minItems for reg properties
> 
>  .../nvidia,tegra186-mc.yaml                   | 20 ++++++++++++
>  include/dt-bindings/clock/tegra234-clock.h    |  9 ++++++
>  include/dt-bindings/memory/tegra234-mc.h      | 32 +++++++++++++++++++
>  3 files changed, 61 insertions(+)
>  create mode 100644 include/dt-bindings/memory/tegra234-mc.h
> 

(...)

>  /** @brief output of mux controlled by CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC4 */
> diff --git a/include/dt-bindings/memory/tegra234-mc.h b/include/dt-bindings/memory/tegra234-mc.h
> new file mode 100644
> index 000000000000..2662f70c15c6
> --- /dev/null
> +++ b/include/dt-bindings/memory/tegra234-mc.h
> @@ -0,0 +1,32 @@
> +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
> +
> +#ifndef DT_BINDINGS_MEMORY_TEGRA234_MC_H
> +#define DT_BINDINGS_MEMORY_TEGRA234_MC_H
> +
> +/* special clients */
> +#define TEGRA234_SID_INVALID		0x00
> +#define TEGRA234_SID_PASSTHROUGH	0x7f
> +
> +
> +/* NISO1 stream IDs */
> +#define TEGRA234_SID_SDMMC4	0x02
> +#define TEGRA234_SID_BPMP	0x10
> +
> +/*
> + * memory client IDs
> + */
> +
> +/* sdmmcd memory read client */
> +#define TEGRA234_MEMORY_CLIENT_SDMMCRAB 0x63
> +/* sdmmcd memory write client */
> +#define TEGRA234_MEMORY_CLIENT_SDMMCWAB 0x67
> +/* BPMP read client */
> +#define TEGRA234_MEMORY_CLIENT_BPMPR 0x93
> +/* BPMP write client */
> +#define TEGRA234_MEMORY_CLIENT_BPMPW 0x94
> +/* BPMPDMA read client */
> +#define TEGRA234_MEMORY_CLIENT_BPMPDMAR 0x95
> +/* BPMPDMA write client */
> +#define TEGRA234_MEMORY_CLIENT_BPMPDMAW 0x96
> +

This header is needed by the driver and DTS patches. One of us can apply
it and provide to the other via stable-tag. I think Arnd and Olof prefer
if headers are coming with DTS and are provided to other trees, so maybe
you will take the bindings and provide a tag for me for the driver?

Best regards,
Krzysztof