66AK2G12: How to Customize Partition of 64MiB QSPI NOR Flash

Asif Malek

Prodigy 110 points

Part Number: 66AK2G12

HI,

I'm booting 66ak2g12 EVM from 64MiB QSPI NOR flash. It has default partitions.

Is there is any way to customize the partition ?

Thanks & Regards

Asif Malek

over 4 years ago

0 Hong Guan64 over 4 years ago

TI__Guru 68260 points

Hi Asif,
QSPI MTD partition for K2G EVM is defined in the "u-boot/arch/arm/dts/keystone-k2g-evm.dts" for u-boot dtb as listed below,
and similarly in the kernel dtb file "kernel/arch/arm/boot/dts/keystone-k2g-evm.dts".

&qspi {
	status = "okay";

	flash0: m25p80@0 {
		compatible = "s25fl512s","spi-flash";
		reg = <0>;
		spi-tx-bus-width = <1>;
		spi-rx-bus-width = <4>;
		spi-max-frequency = <96000000>;
		#address-cells = <1>;
		#size-cells = <1>;
		cdns,tshsl-ns = <392>;
		cdns,tsd2d-ns = <392>;
		cdns,tchsh-ns = <100>;
		cdns,tslch-ns = <100>;
		block-size = <18>;

		partition@0 {
			label = "QSPI.u-boot-spl-os";
			reg = <0x00000000 0x00100000>;
		};
		partition@1 {
			label = "QSPI.u-boot-env";
			reg = <0x00100000 0x00040000>;
		};
		partition@2 {
			label = "QSPI.skern";
			reg = <0x00140000 0x0040000>;
		};
		partition@3 {
			label = "QSPI.pmmc-firmware";
			reg = <0x00180000 0x0040000>;
		};
		partition@4 {
			label = "QSPI.kernel";
			reg = <0x001C0000 0x0800000>;
		};
		partition@5 {
			label = "QSPI.file-system";
			reg = <0x009C0000 0x3640000>;
		};
	};
};

Best,

-Hong

0 Asif Malek over 4 years ago in reply to Hong Guan64

Prodigy 110 points

Hi Hong,

Thanks for the quick reply. Is there any way to customize this partition as per our choice or requirement ?

Thanks & Regards

Asif Malek

0 Hong Guan64 over 4 years ago in reply to Asif Malek

TI__Guru 68260 points

Hi Asif,
Yes, it is ok to modify the "kernel/arch/arm/boot/dts/keystone-k2g-evm.dts" file to reconfigure QSPI MTD partition per your use case.
Best,
-Hong

0 Asif Malek over 4 years ago in reply to Hong Guan64

Prodigy 110 points

HI Hong,

i've tried to compile keystone-k2g-evm.dts (for the time without any changes) using below command,

dtc -I dts -O dtb keystone-k2g-evm.dts > keystone-k2g-evm.dtb


but it throwing error,


ERROR: keystone-k2g-evm.dts:12.1-9 syntax error
FATAL ERROR: Unable to parse input tree

line 12 is : #include "keystone-k2g-evm-dtsi"

Though every header file is there at appropriate location.


Regards
Asif Malek

0 Hong Guan64 over 4 years ago in reply to Asif Malek

TI__Guru 68260 points

Hi Asif,
DTB is auto-built while you build u-boot/kernel from source.
In case you want to build the DTB, there's a section <Compiling the Device Tree Binaries> from the following link:
software-dl.ti.com/.../Foundational_Components_Kernel_Users_Guide.html
Best,
-Hong

Processors

Processors forum

66AK2G12: How to Customize Partition of 64MiB QSPI NOR Flash