linux-kernel - Re: [RESEND PATCH 1/5] mtd: rawnand: tegra: add devicetree binding

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Date:   Tue, 22 May 2018 19:52:30 +0200
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Stefan Agner <stefan@...er.ch>
Cc:     dwmw2@...radead.org, computersforpeace@...il.com,
        marek.vasut@...il.com, robh+dt@...nel.org, mark.rutland@....com,
        thierry.reding@...il.com, mturquette@...libre.com,
        sboyd@...nel.org, dev@...xeye.de, miquel.raynal@...tlin.com,
        richard@....at, marcel@...wiler.com, krzk@...nel.org,
        digetx@...il.com, benjamin.lindqvist@...ian.se,
        jonathanh@...dia.com, pdeschrijver@...dia.com, pgaikwad@...dia.com,
        mirza.krak@...il.com, linux-mtd@...ts.infradead.org,
        linux-tegra@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [RESEND PATCH 1/5] mtd: rawnand: tegra: add devicetree binding

Hello Stefan,

On Tue, 22 May 2018 14:07:05 +0200
Stefan Agner <stefan@...er.ch> wrote:

> From: Lucas Stach <dev@...xeye.de>
> 
> This adds the devicetree binding for the Tegra 2 NAND flash
> controller.
> 
> Signed-off-by: Lucas Stach <dev@...xeye.de>
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> ---
>  .../bindings/mtd/nvidia,tegra20-nand.txt      | 29 +++++++++++++++++++
>  1 file changed, 29 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt
> 
> diff --git a/Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt b/Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt
> new file mode 100644
> index 000000000000..522d442937a9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt
> @@ -0,0 +1,29 @@
> +NVIDIA Tegra NAND Flash controller
> +
> +Required properties:
> +- compatible: Must be one of:
> +  - "nvidia,tegra20-nand"
> +- reg: MMIO address range
> +- interrupts: interrupt output of the NFC controller
> +- clocks: Must contain an entry for each entry in clock-names.
> +  See ../clocks/clock-bindings.txt for details.
> +- clock-names: Must include the following entries:
> +  - nand
> +- resets: Must contain an entry for each entry in reset-names.
> +  See ../reset/reset.txt for details.
> +- reset-names: Must include the following entries:
> +  - nand
> +
> +Optional properties:
> +- nvidia,wp-gpios: GPIO used to disable write protection of the flash
> +
> +  Example:
> +	nand@...08000 {
> +		compatible = "nvidia,tegra20-nand";
> +		reg = <0x70008000 0x100>;
> +		interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&tegra_car TEGRA20_CLK_NDFLASH>;
> +		clock-names = "nand";
> +		resets = <&tegra_car 13>;
> +		reset-names = "nand";
> +	};

Can you represent the controller and NAND chip separately as
recommended here [1].

Thanks,

Boris

[1]https://elixir.bootlin.com/linux/v4.17-rc6/source/Documentation/devicetree/bindings/mtd/nand.txt#L56