ftgmac100: Rework MAC reset and init
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 5 Apr 2017 02:28:51 +0000 (12:28 +1000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 6 Apr 2017 19:38:04 +0000 (12:38 -0700)
commit874b55bf62330ca215758845d8abe93d139f874a
treeb78a0a08348992d5fe870ed7e45af42fbd58d38b
parent855944ce1cc4037d58361b7b1cd0f07c2eb40734
ftgmac100: Rework MAC reset and init

The HW requires a full MAC reset when changing the speed.

Additionally the Aspeed documentation spells out that the
MAC needs to be reset twice with a 10us interval.

We thus move the speed setting and top level reset code
into a new ftgmac100_reset_and_config_mac() function which
handles both. Move the ring pointers initialization there
too in order to reflect the HW change.

Also reduce the timeout for the MAC reset as it shouldn't
take more than 300 clock cycles according to the doc.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/faraday/ftgmac100.c