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| author | Srinivas Kandagatla <srinivas.kandagatla@st.com> | 2014-01-16 10:51:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-16 15:23:43 -0800 |
| commit | 9cbadf094d9d479413dc8cfa77dff9e732184337 (patch) | |
| tree | 67ff8e1cc0f72f52e0a1baa0c2d00decd23afa64 /drivers | |
| parent | 82a342d18a0653723156c98395bb75e9748e8968 (diff) | |
| download | linux-9cbadf094d9d479413dc8cfa77dff9e732184337.tar.gz linux-9cbadf094d9d479413dc8cfa77dff9e732184337.tar.bz2 linux-9cbadf094d9d479413dc8cfa77dff9e732184337.zip | |
net: stmmac: support max-speed device tree property
This patch adds support to "max-speed" property which is a standard
Ethernet device tree property. max-speed specifies maximum speed
(specified in megabits per second) supported the device.
Depending on the clocking schemes some of the boards can only support
few link speeds, so having a way to limit the link speed in the mac
driver would allow such setups to work reliably.
Without this patch there is no way to tell the driver to limit the
link speed.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 4 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index ecdc8ab50425..15192c05750f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -776,6 +776,7 @@ static int stmmac_init_phy(struct net_device *dev) char phy_id_fmt[MII_BUS_ID_SIZE + 3]; char bus_id[MII_BUS_ID_SIZE]; int interface = priv->plat->interface; + int max_speed = priv->plat->max_speed; priv->oldlink = 0; priv->speed = 0; priv->oldduplex = -1; @@ -800,7 +801,8 @@ static int stmmac_init_phy(struct net_device *dev) /* Stop Advertising 1000BASE Capability if interface is not GMII */ if ((interface == PHY_INTERFACE_MODE_MII) || - (interface == PHY_INTERFACE_MODE_RMII)) + (interface == PHY_INTERFACE_MODE_RMII) || + (max_speed < 1000 && max_speed > 0)) phydev->advertising &= ~(SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 38bd1f4fbe33..9377ee623fa5 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -42,6 +42,10 @@ static int stmmac_probe_config_dt(struct platform_device *pdev, *mac = of_get_mac_address(np); plat->interface = of_get_phy_mode(np); + /* Get max speed of operation from device tree */ + if (of_property_read_u32(np, "max-speed", &plat->max_speed)) + plat->max_speed = -1; + plat->bus_id = of_alias_get_id(np, "ethernet"); if (plat->bus_id < 0) plat->bus_id = 0; |