[U-Boot] [RFC 08/11] mtd/nand: Add DT definitions for Olimex Lime

[Boris Brezillon <boris.brezillon@free-electrons.com>]

On Fri,  5 Jun 2015 13:52:41 +0200
Roy Spliet <r.spliet@ultimaker.com> wrote:

> Signed-off-by: Roy Spliet <r.spliet@ultimaker.com>
> ---
>  arch/arm/dts/sun7i-a20-olinuxino-lime.dts | 41 ++++++++++++++
>  arch/arm/dts/sun7i-a20.dtsi               | 90 +++++++++++++++++++++++++++++++
>  2 files changed, 131 insertions(+)
> 
> diff --git a/arch/arm/dts/sun7i-a20-olinuxino-lime.dts b/arch/arm/dts/sun7i-a20-olinuxino-lime.dts
> index 6592cb2..cc5e65d 100644
> --- a/arch/arm/dts/sun7i-a20-olinuxino-lime.dts
> +++ b/arch/arm/dts/sun7i-a20-olinuxino-lime.dts
> @@ -181,3 +181,44 @@
>  	usb2_vbus-supply = <&reg_usb2_vbus>;
>  	status = "okay";
>  };
> +
> +&nfc {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&nand_pins_a &nand_cs0_pins_a &nand_rb0_pins_a>;
> +	status = "okay";
> +
> +	nand at 0 {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		reg = <0>;
> +		allwinner,rb = <0>;
> +		nand-ecc-mode = "hw";
> +		nand-ecc-strength = <40>;
> +		nand-ecc-step-size = <1024>;
> +		nand-rnd-mode = "hw";
> +		nand-randomizer-seeds = /bits/ 16 <
> +			0x2b75 0x0bd0 0x5ca3 0x62d1 0x1c93 0x07e9 0x2162 0x3a72
> +			0x0d67 0x67f9 0x1be7 0x077d 0x032f 0x0dac 0x2716 0x2436
> +			0x7922 0x1510 0x3860 0x5287 0x480f 0x4252 0x1789 0x5a2d
> +			0x2a49 0x5e10 0x437f 0x4b4e 0x2f45 0x216e 0x5cb7 0x7130
> +			0x2a3f 0x60e4 0x4dc9 0x0ef0 0x0f52 0x1bb9 0x6211 0x7a56
> +			0x226d 0x4ea7 0x6f36 0x3692 0x38bf 0x0c62 0x05eb 0x4c55
> +			0x60f4 0x728c 0x3b6f 0x2037 0x7f69 0x0936 0x651a 0x4ceb
> +			0x6218 0x79f3 0x383f 0x18d9 0x4f05 0x5c82 0x2912 0x6f17
> +			0x6856 0x5938 0x1007 0x61ab 0x3e7f 0x57c2 0x542f 0x4f62
> +			0x7454 0x2eac 0x7739 0x42d4 0x2f90 0x435a 0x2e52 0x2064
> +			0x637c 0x66ad 0x2c90 0x0bad 0x759c 0x0029 0x0986 0x7126
> +			0x1ca7 0x1605 0x386a 0x27f5 0x1380 0x6d75 0x24c3 0x0f8e
> +			0x2b7a 0x1418 0x1fd1 0x7dc1 0x2d8e 0x43af 0x2267 0x7da3
> +			0x4e3d 0x1338 0x50db 0x454d 0x764d 0x40a3 0x42e6 0x262b
> +			0x2d2e 0x1aea 0x2e17 0x173d 0x3a6e 0x71bf 0x25f9 0x0a5d
> +			0x7c57 0x0fbe 0x46ce 0x4939 0x6b17 0x37bb 0x3e91 0x76db>;
> +		onfi,nand-timing-mode = <0x1f>;

Can we use the same binding we have in mainline Linux (not my branch).
In mainline, the onfi,nand-timing-mode has been dropped in favor of
ONFI timing mode definition in the nand_ids table.
ECC strength and step size should also be extracted from the nand_ids
table, unless you want to force something different (which doesn't seem
to be the case here).
Moreover, the randomizer stuff haven't been reviewed/accepted yet.
To support the randomizer stuff in the meantime, you could define the
randomizer-seeds table in the board config header and use sunxi
specific commands to select the randomizer mode and randomizer seeds
table (if you have several tables).



-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com