[PATCH v2 2/2] mtd: spi-nor: sst: Add support for Global Unlock on sst26vf

[Tudor.Ambarus at microchip.com]

On 1/20/21 4:05 PM, Michael Walle wrote:
>> diff --git a/drivers/mtd/spi-nor/sst.c b/drivers/mtd/spi-nor/sst.c
>> index 00e48da0744a..d6e1396abb96 100644
>> --- a/drivers/mtd/spi-nor/sst.c
>> +++ b/drivers/mtd/spi-nor/sst.c
>> @@ -8,6 +8,39 @@
>>
>>  #include "core.h"
>>
>> +static int sst26vf_lock(struct spi_nor *nor, loff_t ofs, uint64_t len)
>> +{
>> +     return -EOPNOTSUPP;
>> +}
>> +
>> +static int sst26vf_unlock(struct spi_nor *nor, loff_t ofs, uint64_t
>> len)
>> +{
>> +     if (ofs == 0 && len == nor->params->size)
>> +             return spi_nor_global_block_unlock(nor);
> 
> 
> Some blocks might not be unlocked because they are permanently
> locked. Does it make sense to read BPNV of the control register
> and add a debug message here?

It would, yes. If any block is permanently locked in the unlock_all case,
I'll just print a dbg message and return -EINVAL. Sounds good?

Cheers,
ta