diff options
| author | Tobias Waldekranz <tobias@waldekranz.com> | 2022-01-26 19:05:41 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-01-27 16:41:29 +0300 |
| commit | 909bea73485fab5e99e222e727e82b259d667880 (patch) | |
| tree | 80a015c9f2b37445a259c7054b1b0fc0ebfe57c6 | |
| parent | 1d14eb15dc2c3961ffe88d20df17fb2e2eaf1504 (diff) | |
| download | linux-909bea73485fab5e99e222e727e82b259d667880.tar.xz | |
net/fsl: xgmac_mdio: Support preamble suppression
Support the standard "suppress-preamble" attribute to disable preamble
generation.
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/freescale/xgmac_mdio.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c index 40442d64a247..18bf2370d45a 100644 --- a/drivers/net/ethernet/freescale/xgmac_mdio.c +++ b/drivers/net/ethernet/freescale/xgmac_mdio.c @@ -39,6 +39,7 @@ struct tgec_mdio_controller { #define MDIO_STAT_CLKDIV(x) (((x>>1) & 0xff) << 8) #define MDIO_STAT_BSY BIT(0) #define MDIO_STAT_RD_ER BIT(1) +#define MDIO_STAT_PRE_DIS BIT(5) #define MDIO_CTL_DEV_ADDR(x) (x & 0x1f) #define MDIO_CTL_PORT_ADDR(x) ((x & 0x1f) << 5) #define MDIO_CTL_PRE_DIS BIT(10) @@ -254,6 +255,21 @@ irq_restore: return ret; } +static void xgmac_mdio_set_suppress_preamble(struct mii_bus *bus) +{ + struct mdio_fsl_priv *priv = (struct mdio_fsl_priv *)bus->priv; + struct tgec_mdio_controller __iomem *regs = priv->mdio_base; + struct device *dev = bus->parent; + u32 mdio_stat; + + if (!device_property_read_bool(dev, "suppress-preamble")) + return; + + mdio_stat = xgmac_read32(®s->mdio_stat, priv->is_little_endian); + mdio_stat |= MDIO_STAT_PRE_DIS; + xgmac_write32(mdio_stat, ®s->mdio_stat, priv->is_little_endian); +} + static int xgmac_mdio_probe(struct platform_device *pdev) { struct fwnode_handle *fwnode; @@ -301,6 +317,8 @@ static int xgmac_mdio_probe(struct platform_device *pdev) priv->has_a011043 = device_property_read_bool(&pdev->dev, "fsl,erratum-a011043"); + xgmac_mdio_set_suppress_preamble(bus); + fwnode = pdev->dev.fwnode; if (is_of_node(fwnode)) ret = of_mdiobus_register(bus, to_of_node(fwnode)); |