[PATCH 1/3] spi/qspi: Add memory mapped read support.

[Mark Brown]

On Tue, Oct 15, 2013 at 05:19:07PM +0530, Sourav Poddar wrote:
> On Tuesday 15 October 2013 04:46 PM, Mark Brown wrote:

> >Can you fix this by enabling the clock is enabled when you return the
> >buffer to the MTD layer and then disabling the clock when the buffer is
> >released?

> Sorry, I did not get you here. With memory mapped read, there is no
> buffer exchanged, everything takes place at the mtd layer only, what gets
> exchanged is just the memory mapped address.

The buffer is the memory mapped address - part of getting the address
should be preparing the hardware for it.

>      if (spi->mode && SPI_RX_MMAP) {
>          printk("memory mapped mode set\n");
> -        flash->mmap_read = true;
> +        flash->mmap_read = spi->memory_map;

So this probably needs to be a function call to get the buffer (and a
corresponding one to free it).
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