diff options
| author |   Michael Walle <michael@walle.cc> | 2021-01-20 20:43:03 +0100 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2021-01-21 19:50:47 -0800 |
| commit | 43e5763152e2d4679954da0d35029637f017b0b3 (patch) | |
| tree | 9f0bdf98f78d966e3f3b9a8c31cd269235cb4c24 /drivers/net/ethernet/cadence/macb_main.c | |
| parent | net: remove aurora nb8800 driver (diff) | |
| download | linux-dev-43e5763152e2d4679954da0d35029637f017b0b3.tar.xz linux-dev-43e5763152e2d4679954da0d35029637f017b0b3.zip | |
net: macb: ignore tx_clk if MII is used
If the MII interface is used, the PHY is the clock master, thus don't
set the clock rate. On Zynq-7000, this will prevent the following
warning:
macb e000b000.ethernet eth0: unable to generate target frequency: 25000000 Hz
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20210120194303.28268-1-michael@walle.cc
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/cadence/macb_main.c')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 814a5b10141d..472bf8f220bc 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -470,6 +470,10 @@ static void macb_set_tx_clk(struct macb *bp, int speed) if (!bp->tx_clk || (bp->caps & MACB_CAPS_CLK_HW_CHG)) return; + /* In case of MII the PHY is the clock master */ + if (bp->phy_interface == PHY_INTERFACE_MODE_MII) + return; + switch (speed) { case SPEED_10: rate = 2500000; |