diff options
author | Joel Stanley <joel@jms.id.au> | 2017-10-13 12:16:38 +0800 |
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committer | David S. Miller <davem@davemloft.net> | 2017-10-18 12:09:06 +0100 |
commit | 4b70c62b9eafcee0505b440732d2e00c50f3085d (patch) | |
tree | ca6718f6c58846349bbbecc6cb5a047d3662bc83 /arch/arm64 | |
parent | 8a5f2166a6288ee4b5a393f1ebc8cfb26b0510f0 (diff) |
net: ftgmac100: Request clock and set speed
According to the ASPEED datasheet, gigabit speeds require a clock of
100MHz or higher. Other speeds require 25MHz or higher. This patch
configures a 100MHz clock if the system has a direct-attached
PHY, or 25MHz if the system is running NC-SI which is limited to 100MHz.
There appear to be no other upstream users of the FTGMAC100 driver it is
hard to know the clocking requirements of other platforms. Therefore a
conservative approach was taken with enabling clocks. If the platform is
not ASPEED, both requesting the clock and configuring the speed is
skipped.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Tested-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/arm64')
0 files changed, 0 insertions, 0 deletions