net: stmmac: dwmac-sun8i: Support different ranges for TX/RX delay chains

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On the R40 SoC, the RX delay chain only has a range of 0~7 (hundred
picoseconds), instead of 0~31. Also the TX delay chain is completely
absent.

This patch adds support for different ranges by adding per-compatible
maximum values in the variant data. A maximum of 0 indicates that the
delay chain is not supported or absent.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Chen-Yu Tsai 2018-05-14 03:14:24 +08:00 • committed by David S. Miller

parent 49a06cae6e

commit 7b270b725a

1 changed files with 23 additions and 9 deletions

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drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c

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