[PATCH linux dev-5.3 1/2] ARM: dts: Add 128MiB OpenBMC flash layout

[Cédric Le Goater]

On 26/09/2019 08:31, Joel Stanley wrote:
> From: Brad Bishop <bradleyb at fuzziesquirrel.com>
> 
> This is an alternate layout used by OpenBMC systems that require more
> space on the BMC's flash. In addition to more space for the rootfs, it
> supports a larger u-boot and Linux kernel FIT image.
> 
> The division of space is as follows:
> 
>  u-boot + env: 1MB
>  kernel/FIT: 9MB
>  rwfs: 86MB
>  rofs: 32MB
> 
> OpenBMC-Staging-Count: 1
> Signed-off-by: Brad Bishop <bradleyb at fuzziesquirrel.com>
> Signed-off-by: Joel Stanley <joel at jms.id.au>


Reviewed-by: Cédric Le Goater <clg at kaod.org>


> ---
> v2: adjust layout to have larger u-boot and kernel
> ---
>  .../boot/dts/openbmc-flash-layout-128.dtsi    | 32 +++++++++++++++++++
>  1 file changed, 32 insertions(+)
>  create mode 100644 arch/arm/boot/dts/openbmc-flash-layout-128.dtsi
> 
> diff --git a/arch/arm/boot/dts/openbmc-flash-layout-128.dtsi b/arch/arm/boot/dts/openbmc-flash-layout-128.dtsi
> new file mode 100644
> index 000000000000..05101a38c5bd
> --- /dev/null
> +++ b/arch/arm/boot/dts/openbmc-flash-layout-128.dtsi
> @@ -0,0 +1,32 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +
> +partitions {
> +	compatible = "fixed-partitions";
> +	#address-cells = <1>;
> +	#size-cells = <1>;
> +
> +	u-boot at 0 {
> +		reg = <0x0 0xe0000>; // 896KB
> +		label = "u-boot";
> +	};
> +
> +	u-boot-env at e0000 {
> +		reg = <0xe0000 0x20000>; // 128KB
> +		label = "u-boot-env";
> +	};
> +
> +	kernel at 100000 {
> +		reg = <0x100000 0x900000>; // 9MB
> +		label = "kernel";
> +	};
> +
> +	rofs at a00000 {
> +		reg = <0xa00000 0x5600000>; // 86MB
> +		label = "rofs";
> +	};
> +
> +	rwfs at 6000000 {
> +		reg = <0x6000000 0x2000000>; // 32MB
> +		label = "rwfs";
> +	};
> +};
>