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

[Mark Brown]

On Tue, Oct 15, 2013 at 06:53:46PM +0530, Sourav Poddar wrote:

> Not sure, if free buf is needed as devm_* variant is used to allocate that
> memory.

I would expect the buffer to only be requested by the flash driver when
actively in use.  This will enable the SPI controller driver to save
power (by stopping the clock for example as in your case) when the flash
isn't actively being used.
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