[PATCH 1/3] spi:fsl-dspi:add dspi tcfq mode transfer support

[Mark Brown]

On Thu, Sep 25, 2014 at 06:24:23PM +0800, Chao Fu wrote:

> Remove bitbang:
> Add tcf funtions, DSPI module need get cs change information in a spi transfer.
> According cs change, DSPI will give last data the right flag. Bitbang provide
> cs change behind the last data in a transfer. So DSPI can not deal the last data in
> every transfer properly, so remove the bitbang in the driver.
>
> Merge duplicate code:
> 	dspi_data_from_popr
> 	dspi_data_to_pushr
> 
> Remove clk reference in regmap I/O:
> Set the clk parament is NULL in devm_regmap_init_mmio_clk, it will avoid clk handle
> in every register read/write, and advance tranferring efficiency.

Like Shawn says this is three separate changes so should be three
separate patchess.
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