Currently device ID for flash mounted on HiFive Unleashed is added to U-Boot. Also there are few patches to go mainline (Thanks to Jagan Tekki and Bin Meng).
This series addresses few issues discussed there: Patch 1: Includes hifive-unleashed-a00-u-boot.dts for building DTB Patch 2: Prints fdt base address which can be used for debugging purpose. Patch 3,4: Number of chip select's for the spi nodes and adds method to claim and release the bus Earlier it was observed that sf probe 0:2/4/6/8 etc.. used to detect the flash device even though it is only connected to chip select 0, with these patches flash is now probed only CS0. Patch 5,7: A workaround is added to make flash device accessible in single bit mode & is tagged with TODO. Patch 6: Introduce spi_nor_fixups method similar to linux to fix wrongly read parameters from SFDP. This series is based on commit 052170c6a043 ("configs: Resync with savedefconfig") with two below mentioned patches from [1] [U-Boot,v2,4/5] riscv: dts: hifive-unleashed-a00: Add -u-boot.dtsi [U-Boot,v2,5/5] sifive: fu540: Enable spi-nor flash support
[1] https://patchwork.ozlabs.org/patch/1177979/
The above series is available for testing here[2] [2] https://github.com/sagsifive/u-boot/tree/dev/sagark/test_spi-nor
================Log for reference===================== => bdinfo boot_params = 0x0000000000000000 DRAM bank = 0x0000000000000000 -> start = 0x0000000080000000 -> size = 0x0000000200000000 relocaddr = 0x00000000fff8c000 reloc off = 0x000000007fd8c000 fdt_blob = 0x00000000ff768530 ->FDT base address ethaddr = 70:b3:d5:92:f2:c8 IP addr = <NULL> baudrate = 115200 bps => fdt addr 0x00000000ff768530 => fdt print /aliases aliases { serial0 = "/soc/serial@10010000"; serial1 = "/soc/serial@10011000"; ethernet0 = "/soc/ethernet@10090000"; spi0 = "/soc/spi@10040000"; -> Alias nodes from patch1 spi2 = "/soc/spi@10050000"; }; =>---------------------------------------------------------------- Full flash memory erase/write/read/validate
=> sf probe 0:0 SF: Detected is25wp256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB => mw 0x80600000 0x12348765 0x800000 => sf erase 0x0 0x2000000 SF: 33554432 bytes @ 0x0 Erased: OK => sf write 0x80600000 0x0 0x2000000 device 0 whole chip SF: 33554432 bytes @ 0x0 Written: OK => sf read 0x82600000 0x0 0x2000000 device 0 whole chip SF: 33554432 bytes @ 0x0 Read: OK => cmp.b 0x80600000 0x82600000 0x2000000 Total of 33554432 byte(s) were the same =>---------------------------------------------------------------- Flash detection only at valid Chip select => sf probe 0:0 SF: Detected is25wp256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB => sf probe 0:1 Invalid cs number = 1 Failed to initialize SPI flash at 0:1 (error -22) => sf probe 0:2 Invalid cs number = 2 Failed to initialize SPI flash at 0:2 (error -22) => sf probe 0:4 Invalid cs number = 4 Failed to initialize SPI flash at 0:4 (error -22) => sf probe 0:8 Invalid cs number = 8 Failed to initialize SPI flash at 0:8 (error -22) =>----------------------------------------------------------------
Sagar Shrikant Kadam (7): riscv: dts: include -u-boot for dtb bdinfo: fu540: print fdt descriptor base for debug fu540: dtsi: spi: add num-cs info to dt spi: fu540: add claim and release method to spi-sifive.c spi: fu540: fix: use spi xfer bitlen for spi transfer nor: add post bfpt fix handler for is25wp256 device fu540: spi-nor: modify the flash read and program opcodes
arch/riscv/dts/fu540-c000.dtsi | 3 ++ arch/riscv/dts/hifive-unleashed-a00.dts | 1 + board/sifive/fu540/Kconfig | 1 + cmd/bdinfo.c | 1 + drivers/mtd/spi/sf_internal.h | 16 +++++++ drivers/mtd/spi/spi-nor-core.c | 76 ++++++++++++++++++++++++++++++++- drivers/mtd/spi/spi-nor-ids.c | 7 ++- drivers/spi/spi-sifive.c | 55 +++++++++++++++++++++--- include/linux/mtd/spi-nor.h | 1 + 9 files changed, 153 insertions(+), 8 deletions(-)