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From: Dmitry Osipenko <digetx@gmail.com>
To: Boris Brezillon <boris.brezillon@bootlin.com>,
	Stefan Agner <stefan@agner.ch>
Cc: dwmw2@infradead.org, computersforpeace@gmail.com,
	marek.vasut@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com,
	thierry.reding@gmail.com, benjamin.lindqvist@endian.se,
	pgaikwad@nvidia.com, dev@lynxeye.de, mirza.krak@gmail.com,
	richard@nod.at, pdeschrijver@nvidia.com,
	linux-kernel@vger.kernel.org, krzk@kernel.org,
	jonathanh@nvidia.com, devicetree@vger.kernel.org,
	linux-mtd@lists.infradead.org, marcel@ziswiler.com,
	miquel.raynal@bootlin.com, linux-tegra@vger.kernel.org
Subject: Re: [PATCH v3 3/6] mtd: rawnand: tegra: add devicetree binding
Date: Tue, 5 Jun 2018 23:19:14 +0300	[thread overview]
Message-ID: <faa40dac-ab2a-2d43-3a43-2d46cebcd539@gmail.com> (raw)
In-Reply-To: <20180601093025.2817ff30@bbrezillon>

On 01.06.2018 10:30, Boris Brezillon wrote:
> On Fri,  1 Jun 2018 00:16:34 +0200
> Stefan Agner <stefan@agner.ch> wrote:
> 
>> This adds the devicetree binding for the Tegra 2 NAND flash
>> controller.
>>
>> Signed-off-by: Lucas Stach <dev@lynxeye.de>
>> Signed-off-by: Stefan Agner <stefan@agner.ch>
>> ---
>>  .../bindings/mtd/nvidia-tegra20-nand.txt      | 64 +++++++++++++++++++
>>  1 file changed, 64 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..5cd984ef046b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mtd/nvidia-tegra20-nand.txt
>> @@ -0,0 +1,64 @@
>> +NVIDIA Tegra NAND Flash controller
>> +
>> +Required properties:
>> +- compatible: Must be one of:
>> +  - "nvidia,tegra20-nand"
> 
> As discussed previously, I prefer "nvidia,tegra20-nand-controller" or
> "nvidia,tegra20-nfc".
> 
>> +- 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 children nodes:
>> +Individual NAND chips are children of the NAND controller node. Currently
>> +only one NAND chip supported.
>> +
>> +Required children node properties:
>> +- reg: An integer ranging from 1 to 6 representing the CS line to use.
>> +
>> +Optional children node properties:
>> +- nand-ecc-mode: String, operation mode of the NAND ecc mode. Currently only
>> +		 "hw" is supported.
>> +- nand-ecc-algo: string, algorithm of NAND ECC.
>> +		 Supported values with "hw" ECC mode are: "rs", "bch".
>> +- nand-bus-width : See nand.txt
>> +- nand-on-flash-bbt: See nand.txt
>> +- nand-ecc-strength: integer representing the number of bits to correct
>> +		     per ECC step (always 512). Supported strength using HW ECC
>> +		     modes are:
>> +		     - RS: 4, 6, 8
>> +		     - BCH: 4, 8, 14, 16
>> +- nand-ecc-maximize: See nand.txt
>> +- nand-is-boot-medium: Makes sure only ECC strengths supported by the boot ROM
>> +		       are choosen.
>> +- wp-gpios: GPIO specifier for the write protect pin.
>> +
>> +Optional child node of NAND chip nodes:
>> +Partitions: see partition.txt
>> +
>> +  Example:
>> +	nand@70008000 {
> 
> 	nand-controller@70008000 {
> 
>> +		compatible = "nvidia,tegra20-nand";
> 
> 		compatible = "nvidia,tegra20-nand-controller";
> 
> or
> 
> 		compatible = "nvidia,tegra20-nfc";
> 

Maybe it's just me, but when I'm reading "nfc", my first association is the
"Near Field Communication". Probably an explicit
"nvidia,tegra20-nand-controller" variant is more preferable.

>> +		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";
>> +
>> +		nand-chip@0 {
> 
> 		nand@0 {
> 
>> +			reg = <0>;
>> +			#address-cells = <1>;
>> +			#size-cells = <1>;
>> +			nand-bus-width = <8>;
>> +			nand-on-flash-bbt;
>> +			nand-ecc-algo = "bch";
>> +			nand-ecc-strength = <8>;
>> +			wp-gpios = <&gpio TEGRA_GPIO(S, 0) GPIO_ACTIVE_LOW>;
>> +		};
>> +	};
> 
> With this addressed,
> 
> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
> 

  reply	other threads:[~2018-06-05 20:19 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-31 22:16 [PATCH v3 0/6] mtd: rawnand: add NVIDIA Tegra NAND flash support Stefan Agner
2018-05-31 22:16 ` [PATCH v3 1/6] mtd: rawnand: add Reed-Solomon error correction algorithm Stefan Agner
2018-06-01  7:26   ` Boris Brezillon
2018-06-01  9:25     ` Boris Brezillon
2018-06-01 13:34       ` Stefan Agner
2018-06-01 13:43         ` Boris Brezillon
2018-05-31 22:16 ` [PATCH v3 2/6] mtd: rawnand: add an option to specify NAND chip as a boot device Stefan Agner
2018-06-01  7:26   ` Boris Brezillon
2018-06-05 20:11   ` Rob Herring
2018-06-06  7:28     ` Boris Brezillon
2018-05-31 22:16 ` [PATCH v3 3/6] mtd: rawnand: tegra: add devicetree binding Stefan Agner
2018-06-01  7:30   ` Boris Brezillon
2018-06-05 20:19     ` Dmitry Osipenko [this message]
2018-06-06 10:39       ` Thierry Reding
2018-06-06 10:45         ` Boris Brezillon
2018-06-06 11:07           ` Thierry Reding
2018-06-06 12:14             ` Stefan Agner
2018-06-06 12:31               ` Boris Brezillon
2018-06-05 20:13   ` Rob Herring
2018-05-31 22:16 ` [PATCH v3 4/6] mtd: rawnand: add NVIDIA Tegra NAND Flash controller driver Stefan Agner
2018-06-01  9:20   ` Dmitry Osipenko
2018-06-08 21:51     ` Stefan Agner
2018-06-09  5:52       ` Boris Brezillon
2018-06-09  6:23         ` Stefan Agner
2018-06-09  6:41           ` Boris Brezillon
2018-06-09  6:46             ` Boris Brezillon
2018-06-09  6:55               ` Boris Brezillon
2018-06-09  6:51             ` Stefan Agner
2018-06-09 12:21       ` Dmitry Osipenko
2018-06-10 11:09         ` Stefan Agner
2018-06-10 15:00           ` Dmitry Osipenko
2018-06-10 15:32             ` Boris Brezillon
2018-06-11 11:45               ` Dmitry Osipenko
2018-06-11 11:50                 ` Boris Brezillon
2018-06-11 13:10                   ` Dmitry Osipenko
2018-06-04 17:16   ` Randolph Maaßen
2018-06-04 20:56     ` Stefan Agner
2018-06-09  5:55   ` Boris Brezillon
2018-06-09  7:18   ` Boris Brezillon
2018-05-31 22:16 ` [PATCH v3 5/6] ARM: dts: tegra: add Tegra20 NAND flash controller node Stefan Agner
2018-05-31 22:16 ` [PATCH v3 6/6] ARM: dts: tegra: enable NAND flash on Colibri T20 Stefan Agner

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