net: ethernet: stmmac: dwmac-rk: make clk enablement first in
From: Heiko Stuebner <heiko@...> Date: Tue, 20 Dec 2016 15:13:24 +0100
Commit-Message
Right now the dwmac-rk tries to set up the GRF-specific speed and link options before enabling clocks, phys etc and on previous socs this works because the GRF is supplied on the whole by one clock. On the rk3399 however the GRF (General Register Files) clock-supply has been split into multiple clocks and while there is no specific grf-gmac clock like for other sub-blocks, it seems the mac-specific portions are actually supplied by the general mac clock. This results in hangs on rk3399 boards if the driver is build as module. When built in te problem of course doesn't surface, as the clocks are of course still on at the stage before clock_disable_unused. To solve this, simply move the clock enablement to the first position in the powerup callback. This is also a good idea in general to enable clocks before everything else. Tested on rk3288, rk3368 and rk3399 the dwmac still works on all of them. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
This should probably be a fix for 4.10-rc, as right now my rk3399evb hangs on boot with the arm64 defconfig due to this. drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
Statistics
- 4 lines added
- 4 lines removed