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aspeed/smc: Fix number of dummy cycles for FAST_READ_4 command 

The Linux kernel recently started using FAST_READ_4 commands.
This results in flash read failures. At the same time, the m25p80
emulation is seen to read 8 more bytes than expected. Adjusting the
expected number of dummy cycles to match FAST_READ fixes the problem.

Fixes: f95c4bffdc ("aspeed/smc: snoop SPI transfers to fake dummy cycles")
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Guenter Roeck 2020-03-16 15:52:24 +00:00 committed by Peter Maydell
parent 9c85bcd8f5
commit 7faf6f1790
1 changed files with 1 additions and 1 deletions
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2
hw/ssi/aspeed_smc.c
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@ -788,11 +788,11 @@ static int aspeed_smc_num_dummies(uint8_t command)
case FAST_READ: case FAST_READ:
case DOR: case DOR:
case QOR: case QOR:
case FAST_READ_4:
case DOR_4: case DOR_4:
case QOR_4: case QOR_4:
return 1; return 1;
case DIOR: case DIOR:
case FAST_READ_4:
case DIOR_4: case DIOR_4:
return 2; return 2;
case QIOR: case QIOR: