[U-Boot] [U-Boot, v4, 57/66] rockchip: spi: enable support for the rk_spi driver for the RK3368

[Philipp Tomsich]

> For the RK3368, we can reuse the SPI driver (although we'll have to
> eventually investigate whether it can be merged with the
> designware_spi.c driver) also used for the RK3288 and RK3399.
> This adds the necessary compatible string to support the RK3368.
> 
> Note that the assumption that GPLL will be clocked at 594MHz is not
> true for the RK3368, but this will not lead to incorrect functioning
> (just to a lower-than-expected SPI operating frequency): this has been
> documented in the driver, so it doesn't cause any headaches when
> someone next needs to touch the clock code of this driver.
> 
> Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> 
> Version-changes: 2
> - added in this version
> 
> Reviewed-by: Simon Glass <sjg at chromium.org>
> ---
> 
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/spi/rk_spi.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 

Applied to u-boot-rockchip, thanks!