[PATCH net-next 00/21] net: stmmac: rk: simplify per-SoC configuration

["Russell King (Oracle)" <linux@armlinux.org.uk>]

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dwmac-rk has an excessive variability between each individual SoCs
which makes this file extremely large.

This series reworks the per-SoC handling, moving the majority of it
out of code and into data in a way that greatly reduces the lines of
code necessary for each SoC, moving the code into the higher level
functions in this file.

In order to do this, we need a version of FIELD_PREP_WM16() that works
with non-constant masks, so we introduce rk_encode_wm16().

We change the definitions to reveal the fact that in all of this
variability, there is a lot of commonality in terms of the values of
the bitfields, even though these bitfields appear to be randomly
placed within registers.

Both of these allow us to progressively move to a situation where
the SoC independent code can, in the mojority of cases, program these
RGMII clocks, RMII clocks and RMII speed without calling any SoC
specific code.

Further cleanup may be possible with the (actually incorrect) handling
of RGMII delays, but this is not addressed in this already large
series.

 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 1220 ++++++++++--------------
 1 file changed, 491 insertions(+), 729 deletions(-)

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