New SPI based Serial Flash Controller driver

Hi,

I'm in the process of porting a BSP SPI based Serial Flash Controller to the latest kernel version with a view to pushing it upstream.

Historically, this driver was based on some basic functionality pilfered from the m25p80 driver (mainly the device look-up-table and thelike), but since then has forked into a fully functional driver in its own right - due to lack of Dual and Quad Mode support in Mainline. I am under the impression that support for these modes are due to land shortly, or the patches are at least on the MLs.

The current theory is that we can start to utilise some of the m25p80 driver, which would alleviate a great deal of duplication by our own driver. We would still be required to add a smallish driver to intercept the messages to ensure they are written to the controller in the correct manor.

Can you tell me if there are any other controllers which work in this way? If there are can you point me to them please? If not, tell me I'm spouting nonsense and feel free to advice me on the correct method that these kinds of things should be handled.

Any help will be gratefully received.

Kind regards,
Lee

Lee Jones
Linaro STMicroelectronics Landing Team Lead
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