LS1021A: Not able to boot from QSPI flash

[vishnu_motghare]

I have a working custom board based on LS1021ATWR. Board has two  "spansion,s25fl512s"  flash 64 MB each which is working fine. I am able to boot the device from flash.

RCW & u-boot file used

    - rcw_1000_qspiboot_swap.bin

    - u-boot-swap.bin

Following is the DTS entry for it

&qspi {
	num-cs = <2>;
	bus-num = <0>;
	fsl,qspi-has-second-chip;
	status = "okay";

	qflash0: s70fl01gs@0 {
		compatible = "spansion,s25fl512s", "jedec,spi-nor";
		spi-max-frequency = <50000000>;

		/*
		* NOTE: Changes to this partion layout possibly requires
		* changes in the bootloader and/or environment
		*/
		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			partition@0 {
				label = "RCW";
				reg = <0x0 0x40000>;
			};

			partition@40000 {
				label = "u-boot";
				reg = <0x40000 0xc0000>;
			};

			partition@100000 {
				label = "u-boot-env";
				reg = <0x100000 0x40000>;
			};

			partition@140000 {
				label = "u-boot-env-redund";
				reg = <0x140000 0x40000>;
			};

			partition@180000 {
				label = "qe-ucode";
				reg = <0x180000 0x40000>;
			};

			partition@1c0000 {
				label = "dtb1";
				reg = <0x1c0000 0x40000>;
			};

			partition@200000 {
				label = "kernel1";
				reg = <0x200000 0x400000>;
			};

			partition@600000 {
				label = "rootfs1";
				reg = <0x600000 0xc00000>;
			};
			partition@1200000 {
				label = "dtb2";
				reg = <0x1200000 0x40000>;
			};

			partition@1240000 {
				label = "kernel2";
				reg = <0x1240000 0x500000>;
			};

			partition@1740000 {
				label = "rootfs2";
				reg = <0x1740000 0x2880000>;
			};
		};
	};

	qflash1: s70fl01gs@1 {
		compatible = "spansion,s25fl512s", "jedec,spi-nor";
		spi-max-frequency = <50000000>;

		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			partition@0 {
				label = "user";
				reg = <0x0 0x4000000>;
			};
		};
	};

I have replaced the "s25fl512s" flash with "macronix,mx66lm1g45g" 128 MB flash. Modified the DTS file & booted the device using SD boot & flash the same rcw_1000_qspiboot_swap.bin & u-boot-swap.bin. After Switching back to QSPI boot nothing comes on the console. No u-boot output on the serial console. PBL is supposed to read RCW from /dev/mtd/RCW & then load u-boot from /dev/mtd/u-boot. But nothing comes on serial

Following is my modified DTS for the new flash

&qspi {
	num-cs = <2>;
	bus-num = <0>;
	fsl,qspi-has-second-chip;
	status = "okay";

	qflash0: mx66lm1g45g@0 {
		compatible = "macronix,mx66lm1g45g", "jedec,spi-nor";
		spi-max-frequency = <50000000>;

		/*
		* NOTE: Changes to this partion layout possibly requires
		* changes in the bootloader and/or environment
		*/
		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			partition@0 {
				label = "RCW";
				reg = <0x0 0x40000>;
			};

			partition@40000 {
				label = "u-boot";
				reg = <0x40000 0xc0000>;
			};

			partition@100000 {
				label = "u-boot-env";
				reg = <0x100000 0x40000>;
			};

			partition@140000 {
				label = "u-boot-env-redund";
				reg = <0x140000 0x40000>;
			};

			partition@180000 {
				label = "qe-ucode";
				reg = <0x180000 0x40000>;
			};

			partition@1c0000 {
				label = "dtb1";
				reg = <0x1c0000 0x40000>;
			};

			partition@200000 {
				label = "kernel1";
				reg = <0x200000 0x400000>;
			};

			partition@600000 {
				label = "rootfs1";
				reg = <0x600000 0xc00000>;
			};
			partition@1200000 {
				label = "dtb2";
				reg = <0x1200000 0x40000>;
			};

			partition@1240000 {
				label = "kernel2";
				reg = <0x1240000 0x500000>;
			};

			partition@1740000 {
				label = "rootfs2";
				reg = <0x1740000 0x2880000>;
			};

			partition@3FC0000 {
				label = "user";
				reg = <0x3FC0000 0x4000000>;
			};
		};

Do I need to change any settings in rcw.cfg file for the new flash or in the u-boot code? Any help is appreciated?

[vishnu_motghare]

I've tried with another flash from Macronix MX66L2G45G (256 MB) & Programmed the RCW & u-boot-swap.bin file & I'm able to boot from the flash. But the issue is still there with MX66LM1G45G (128 MB) flash.

Following is my PBL setting in the u-boot source code, do I need to modify anything here for to boot from 128 MB flash?

#PBL preamble and RCW header
aa55aa55 01ee0100

0608000a 00000000 00000000 00000000
20000000 08407922 60000a00 21046000
00000000 00000000 00000000 0021ef00
20024800 2808f340 00000000 00000000