From: Dylan Hung dylan_hung@aspeedtech.com
[ Upstream commit 3d2504524531990b32a0629cc984db44f399d161 ]
AST2600 MAC register 0x58 is writable only when the MAC clock is enabled. Usually, the MAC clock is enabled by the bootloader so register 0x58 is set normally when the bootloader is involved. To make ast2600 ftgmac100 work without the bootloader, postpone the register write until the clock is ready.
Fixes: 137d23cea1c0 ("net: ftgmac100: Fix Aspeed ast2600 TX hang issue") Signed-off-by: Dylan Hung dylan_hung@aspeedtech.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/faraday/ftgmac100.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index d5356db7539a..caf48023f8ea 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1835,11 +1835,6 @@ static int ftgmac100_probe(struct platform_device *pdev) priv->rxdes0_edorr_mask = BIT(30); priv->txdes0_edotr_mask = BIT(30); priv->is_aspeed = true; - /* Disable ast2600 problematic HW arbitration */ - if (of_device_is_compatible(np, "aspeed,ast2600-mac")) { - iowrite32(FTGMAC100_TM_DEFAULT, - priv->base + FTGMAC100_OFFSET_TM); - } } else { priv->rxdes0_edorr_mask = BIT(15); priv->txdes0_edotr_mask = BIT(15); @@ -1911,6 +1906,11 @@ static int ftgmac100_probe(struct platform_device *pdev) err = ftgmac100_setup_clk(priv); if (err) goto err_phy_connect; + + /* Disable ast2600 problematic HW arbitration */ + if (of_device_is_compatible(np, "aspeed,ast2600-mac")) + iowrite32(FTGMAC100_TM_DEFAULT, + priv->base + FTGMAC100_OFFSET_TM); }
/* Default ring sizes */