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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f1541773af
Currently there are 3 different variants of read_id implementation: 1. opcode only. Found in GD5FxGQ4xF. 2. opcode + 1 addr byte. Found in GD5GxGQ4xA/E 3. opcode + 1 dummy byte. Found in other currently supported chips. Original implementation was for variant 1 and let detect function of chips with variant 2 and 3 to ignore the first byte. This isn't robust: 1. For chips of variant 2, if SPI master doesn't keep MOSI low during read, chip will get a random id offset, and the entire id buffer will shift by that offset, causing detect failure. 2. For chips of variant 1, if it happens to get a devid that equals to manufacture id of variant 2 or 3 chips, it'll get incorrectly detected. This patch reworks detect procedure to address problems above. New logic do detection for all variants separatedly, in 1-2-3 order. Since all current detect methods do exactly the same id matching procedure, unify them into core.c and remove detect method from manufacture_ops. Tested on GD5F1GQ4UAYIG and W25N01GVZEIG. Signed-off-by: Chuanhong Guo <gch981213@gmail.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20200208074439.146296-1-gch981213@gmail.com |
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| acpi | ||
| asm-generic | ||
| clocksource | ||
| crypto | ||
| drm | ||
| dt-bindings | ||
| keys | ||
| kunit | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| vdso | ||
| video | ||
| xen | ||