[U-Boot] [UBOOT][PATCHv4 3/6] driver: mtd: spi: Add memory mapped read support

[Sourav Poddar]

On Sunday 06 October 2013 03:03 PM, Gerhard Sittig wrote:
> On Fri, Oct 04, 2013 at 20:21 +0530, Sourav Poddar wrote:
>> diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
>> index c009af5..bee4128 100644
>> --- a/drivers/mtd/spi/sf_ops.c
>> +++ b/drivers/mtd/spi/sf_ops.c
>> @@ -269,7 +269,9 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
>>
>>   	/* Handle memory-mapped SPI */
>>   	if (flash->memory_map) {
>> +		spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MEM_MAP);
>>   		memcpy(data, flash->memory_map + offset, len);
>> +		spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MEM_MAP);
>>   		return 0;
>>   	}
> Feedback has been sent before, but I'm afraid the motivation
> wasn't received appropriately.
Sorry, If I missed any mails.
> Shouldn't the memcpy() call be surrounded by _MAP and _MAP_END
> (please note the _END in the second spi_xfer() invocation)?  The
> current patch doesn't "close" the transfer, which appears to pass
> tests but isn't correct.
>
>
Yes, you are correct. Second xfer should be with a END flag.
I will add it in my next version, thanks for pointing out.
> virtually yours
> Gerhard Sittig