From: Boris Brezillon <boris.brezillon-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Miquel Raynal
<miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Cc: David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Brian Norris
<computersforpeace-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Marek Vasut <marek.vasut-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Richard Weinberger <richard-/L3Ra7n9ekc@public.gmane.org>,
Cyrille Pitchen
<cyrille.pitchen-yU5RGvR974pGWvitb5QawA@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>,
Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>,
Gregory Clement
<gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Sebastian Hesselbarth
<sebastian.hesselbarth-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>,
Daniel Mack <daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>,
Haojian Zhuang
<haojian.zhuang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Robert Jarzmik <robert.jarzmik-GANU6spQydw@public.gmane.org>,
Eric Miao <eric.y.miao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Catalin Marinas <catalin.marinas-5wv7dgnIgG8@public.gmane.org>,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
Ezequiel Garcia <ezequiel.garcia>
Subject: Re: [PATCH 01/12] dt-bindings: mtd: add Marvell NAND controller documentation
Date: Fri, 8 Dec 2017 21:56:51 +0100 [thread overview]
Message-ID: <20171208215651.70480178@bbrezillon> (raw)
In-Reply-To: <20171207201814.30411-2-miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
On Thu, 7 Dec 2017 21:18:03 +0100
Miquel Raynal <miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> Document the legacy and the new bindings for Marvell NAND controller.
>
> The pxa3xx_nand.c driver does only support legacy bindings, which are
> incomplete and inaccurate. A rework of this controller (called
> marvell_nand.c) does support both.
>
> Signed-off-by: Miquel Raynal <miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> ---
> .../devicetree/bindings/mtd/marvell-nand.txt | 84 ++++++++++++++++++++++
> 1 file changed, 84 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mtd/marvell-nand.txt
>
> diff --git a/Documentation/devicetree/bindings/mtd/marvell-nand.txt b/Documentation/devicetree/bindings/mtd/marvell-nand.txt
> new file mode 100644
> index 000000000000..0b3d5e0bab83
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/marvell-nand.txt
> @@ -0,0 +1,84 @@
> +Marvell NAND Flash Controller (NFC)
> +
> +Required properties:
> +- compatible: can be one of the following:
> + * "marvell,armada-8k-nand-controller"
> + * "marvell,armada370-nand-controller"
> + * "marvell,pxa3xx-nand-controller"
> + * "marvell,armada-8k-nand" (deprecated)
> + * "marvell,armada370-nand" (deprecated)
> + * "marvell,pxa3xx-nand" (deprecated)
> +- reg: NAND flash controller memory area.
> +- #address-cells: shall be set to 1. Encode the NAND CS.
> +- #size-cells: shall be set to 0.
> +- interrupts: shall define the NAND controller interrupt.
> +- clocks: shall reference the NAND controller clock.
> +- marvell,system-controller: Set to retrieve the syscon node that handles
> + NAND controller related registers (only required with the
> + "marvell,armada-8k-nand[-controller]" compatibles).
> +
> +Optional properties:
> +- label: see partition.txt. New platforms shall omit this property.
> +- dmas: shall reference DMA channel associated to the NAND controller.
> +- dma-names: shall be "rxtx".
> +
> +Optional children nodes:
> +Children nodes represent the available NAND chips.
> +
> +Required properties:
> +- reg: shall contain the native Chip Select ids (0-3)
> +- marvell,rb: shall contain the native Ready/Busy ids (0-1)
> +
> +Optional properties:
> +- marvell,nand-keep-config: orders the driver not to take the timings
> + from the core and leaving them completely untouched. Bootloader
> + timings will then be used.
> +- nand-on-flash-bbt: see nand.txt.
> +- nand-ecc-mode: see nand.txt. Will use hardware ECC if not specified.
> +- nand-ecc-algo: see nand.txt. This property may be added when using
> + hardware ECC for clarification but will be ignored by the driver
> + because ECC mode is chosen depending on the page size and the strength
> + required by the NAND chip. This value may be overwritten with
> + nand-ecc-strength property.
> +- nand-ecc-strength: see nand.txt.
> +- nand-ecc-step-size: see nand.txt. This has no effect and will be
> + ignored by the driver when using hardware ECC because Marvell's NAND
> + flash controller does use fixed strength (1-bit for Hamming, 16-bit
> + for BCH), so the step size will shrink or grow in order to fit the
> + required strength. Step sizes are not completely random for all and
> + follow certain patterns described in AN-379, "Marvell SoC NFC ECC".
> +
> +See Documentation/devicetree/bindings/mtd/nand.txt for more details on
> +generic bindings.
> +
> +
> +Example:
> +nand_controller: nand-controller@d0000 {
> + compatible = "marvell,armada370-nand-controller";
> + reg = <0xd0000 0x54>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&coredivclk 0>;
> +
> + nand@0 {
> + reg = <0>;
> + marvell,rb = <0>;
> + nand-ecc-mode = "hw";
> + marvell,nand-keep-config;
> + nand-on-flash-bbt;
> + nand-ecc-strength = <4>;
> + nand-ecc-step-size = <512>;
> +
> + partitions {
> + compatible = "fixed-partitions";
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + partition@0 {
> + label = "Rootfs";
> + reg = <0x00000000 0x40000000>;
> + };
> + };
> + };
> +};
Maybe you should also give an example for the old bindings.
BTW, given your properties description, it's not clear which properties
are deprecated. Maybe you should split the doc in 2 sections: one
describing the new bindings, and the other one describing the deprecated
bindings.
--
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next prev parent reply other threads:[~2017-12-08 20:56 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-07 20:18 [PATCH 00/12] Marvell NAND controller rework with ->exec_op() Miquel Raynal
[not found] ` <20171207201814.30411-1-miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-07 20:18 ` [PATCH 01/12] dt-bindings: mtd: add Marvell NAND controller documentation Miquel Raynal
[not found] ` <20171207201814.30411-2-miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-08 20:56 ` Boris Brezillon [this message]
2017-12-07 20:18 ` [PATCH 02/12] mtd: nand: add reworked Marvell NAND controller driver Miquel Raynal
[not found] ` <20171207201814.30411-3-miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-11 16:27 ` Ezequiel Garcia
[not found] ` <CAAEAJfC89bRugBsK8jrK=6fdq76yzjThA74UCAhAaVuonLLNvg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-12-11 16:55 ` Miquel RAYNAL
2017-12-11 17:05 ` Boris Brezillon
2017-12-11 21:02 ` Miquel RAYNAL
2017-12-07 20:18 ` [PATCH 03/12] mtd: nand: replace pxa3xx_nand driver by its rework called marvell_nand Miquel Raynal
2017-12-07 20:18 ` [PATCH 04/12] dt-bindings: mtd: remove pxa3xx NAND controller documentation Miquel Raynal
2017-12-07 20:18 ` [PATCH 05/12] mtd: nand: remove useless fields from pxa3xx NAND platform data Miquel Raynal
2017-12-07 20:18 ` [PATCH 06/12] ARM: dts: armada-370-xp: use reworked NAND controller driver Miquel Raynal
2017-12-07 20:18 ` [PATCH 07/12] ARM: dts: armada-375: " Miquel Raynal
2017-12-07 20:18 ` [PATCH 08/12] ARM: dts: armada-38x: " Miquel Raynal
2017-12-07 20:18 ` [PATCH 09/12] ARM: dts: armada-39x: " Miquel Raynal
2017-12-07 20:18 ` [PATCH 10/12] ARM: dts: pxa: " Miquel Raynal
2017-12-07 20:18 ` [PATCH 11/12] ARM64: dts: marvell: use reworked NAND controller driver on Armada 7K Miquel Raynal
[not found] ` <20171207201814.30411-12-miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-15 10:29 ` Gregory CLEMENT
[not found] ` <87374cmghe.fsf-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-15 10:44 ` Gregory CLEMENT
2017-12-07 20:18 ` [PATCH 12/12] ARM64: dts: marvell: use reworked NAND controller driver on Armada 8K Miquel Raynal
[not found] ` <20171207201814.30411-13-miquel.raynal-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-15 10:29 ` Gregory CLEMENT
[not found] ` <87y3m4l1wi.fsf-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
2017-12-15 10:44 ` Gregory CLEMENT
2017-12-09 23:27 ` [PATCH 00/12] Marvell NAND controller rework with ->exec_op() Ezequiel Garcia
2017-12-14 6:09 ` Boris Brezillon
2017-12-18 7:11 ` Robert Jarzmik
[not found] ` <877etkecig.fsf-4ty26DBLk+jEm7gnYqmdkQ@public.gmane.org>
2017-12-18 8:25 ` Miquel RAYNAL
2017-12-20 21:26 ` Robert Jarzmik
[not found] ` <87y3lxccr7.fsf-4ty26DBLk+jEm7gnYqmdkQ@public.gmane.org>
2017-12-20 21:41 ` Boris Brezillon
2017-12-22 20:11 ` Robert Jarzmik
[not found] ` <87lghucykr.fsf-4ty26DBLk+jEm7gnYqmdkQ@public.gmane.org>
2017-12-22 21:24 ` Boris Brezillon
2017-12-22 22:37 ` Miquel RAYNAL
2017-12-22 22:50 ` Miquel RAYNAL
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