linux-kernel - Re: [PATCH v4 1/2] dt-bindings: Document the STM32 QSPI bindings

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Date:   Sun, 16 Apr 2017 18:53:06 +0200
From:   Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>
To:     Ludovic Barre <ludovic.Barre@...com>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        Marek Vasut <marek.vasut@...il.com>
Cc:     Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        devicetree@...r.kernel.org, Richard Weinberger <richard@....at>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        linux-mtd@...ts.infradead.org,
        Brian Norris <computersforpeace@...il.com>,
        David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH v4 1/2] dt-bindings: Document the STM32 QSPI bindings

Hi all,

Rob, is this version ok for you? If so, I can take it into the
github/spi-nor tree.

Best regards,

Cyrille

Le 13/04/2017 à 19:15, Ludovic Barre a écrit :
> From: Ludovic Barre <ludovic.barre@...com>
> 
> This patch adds documentation of device tree bindings for the STM32
> QSPI controller.
> 
> Signed-off-by: Ludovic Barre <ludovic.barre@...com>
> ---
>  .../devicetree/bindings/mtd/stm32-quadspi.txt      | 43 ++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mtd/stm32-quadspi.txt
> 
> diff --git a/Documentation/devicetree/bindings/mtd/stm32-quadspi.txt b/Documentation/devicetree/bindings/mtd/stm32-quadspi.txt
> new file mode 100644
> index 0000000..ddd18c1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/stm32-quadspi.txt
> @@ -0,0 +1,43 @@
> +* STMicroelectronics Quad Serial Peripheral Interface(QuadSPI)
> +
> +Required properties:
> +- compatible: should be "st,stm32f469-qspi"
> +- reg: the first contains the register location and length.
> +       the second contains the memory mapping address and length
> +- reg-names: should contain the reg names "qspi" "qspi_mm"
> +- interrupts: should contain the interrupt for the device
> +- clocks: the phandle of the clock needed by the QSPI controller
> +- A pinctrl must be defined to set pins in mode of operation for QSPI transfer
> +
> +Optional properties:
> +- resets: must contain the phandle to the reset controller.
> +
> +A spi flash must be a child of the nor_flash node and could have some
> +properties. Also see jedec,spi-nor.txt.
> +
> +Required properties:
> +- reg: chip-Select number (QSPI controller may connect 2 nor flashes)
> +- spi-max-frequency: max frequency of spi bus
> +
> +Optional property:
> +- spi-rx-bus-width: see ../spi/spi-bus.txt for the description
> +
> +Example:
> +
> +qspi: spi@...01000 {
> +	compatible = "st,stm32f469-qspi";
> +	reg = <0xa0001000 0x1000>, <0x90000000 0x10000000>;
> +	reg-names = "qspi", "qspi_mm";
> +	interrupts = <91>;
> +	resets = <&rcc STM32F4_AHB3_RESET(QSPI)>;
> +	clocks = <&rcc 0 STM32F4_AHB3_CLOCK(QSPI)>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_qspi0>;
> +
> +	flash@0 {
> +		reg = <0>;
> +		spi-rx-bus-width = <4>;
> +		spi-max-frequency = <108000000>;
> +		...
> +	};
> +};
>