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| author | Andrew Lunn <andrew@lunn.ch> | 2015-07-06 18:34:55 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-08 22:59:04 (GMT) |
| commit | 6c3e921b18edca290099adfddde8a50236bf2d80 (patch) | |
| tree | d0e5c257f21b489a29a8fe7319bc2ccb54d784c6 /net/core/rtnetlink.c | |
| parent | cfbfd86bfde15020bccde377e11586ee5c8b701d (diff) | |
| download | linux-6c3e921b18edca290099adfddde8a50236bf2d80.tar.xz | |
net: fec: Ensure clocks are enabled while using mdio bus
When a switch is attached to the mdio bus, the mdio bus can be used
while the interface is not open. If the IPG clock is not enabled, MDIO
reads/writes will simply time out.
Add support for runtime PM to control this clock. Enable/disable this
clock using runtime PM, with open()/close() and mdio read()/write()
function triggering runtime PM operations. Since PM is optional, the
IPG clock is enabled at probe and is no longer modified by
fec_enet_clk_enable(), thus if PM is not enabled in the kernel, it is
guaranteed the clock is running when MDIO operations are performed.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/rtnetlink.c')
0 files changed, 0 insertions, 0 deletions