[PATCH net-next v2 5/6] net/faraday: Configure old MDIO interface on Aspeed SoCs
flat view
STALE3678d
From: Joel Stanley <joel@jms.id.au>
Date: 2016-09-21 23:06:09
Also in:
lkml
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Revision v2 of 2 in this series.
Revisions (2)
- v1 [diff vs current]
- v2 current
The Aspeed SoCs have a new MDIO interface as an option in the G4 and G5 SoCs. The old one is still available, so select it in order to remain compatible with the ftgmac100 driver. Signed-off-by: Joel Stanley <joel@jms.id.au> --- drivers/net/ethernet/faraday/ftgmac100.c | 9 +++++++++ drivers/net/ethernet/faraday/ftgmac100.h | 5 +++++ 2 files changed, 14 insertions(+)
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index 189373743ddf..e3653b14008a 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c@@ -1252,12 +1252,21 @@ static int ftgmac100_setup_mdio(struct net_device *netdev) struct ftgmac100 *priv = netdev_priv(netdev); struct platform_device *pdev = to_platform_device(priv->dev); int i, err = 0; + u32 reg; /* initialize mdio bus */ priv->mii_bus = mdiobus_alloc(); if (!priv->mii_bus) return -EIO; + if (of_machine_is_compatible("aspeed,ast2400") || + of_machine_is_compatible("aspeed,ast2500")) { + /* This driver supports the old MDIO interface */ + reg = ioread32(priv->base + FTGMAC100_OFFSET_REVR); + reg &= ~FTGMAC100_REVR_NEW_MDIO_INTERFACE; + iowrite32(reg, priv->base + FTGMAC100_OFFSET_REVR); + }; + priv->mii_bus->name = "ftgmac100_mdio"; snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id);
diff --git a/drivers/net/ethernet/faraday/ftgmac100.h b/drivers/net/ethernet/faraday/ftgmac100.h
index c258586ce4a4..8a377ab1d127 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.h
+++ b/drivers/net/ethernet/faraday/ftgmac100.h@@ -134,6 +134,11 @@ #define FTGMAC100_DMAFIFOS_TXDMA_REQ (1 << 31) /* + * Feature Register + */ +#define FTGMAC100_REVR_NEW_MDIO_INTERFACE BIT(31) + +/* * Receive buffer size register */ #define FTGMAC100_RBSR_SIZE(x) ((x) & 0x3fff)
--
2.9.3