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| author | Ed Blake <ed.blake@sondrel.com> | 2017-09-26 11:44:53 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-09-28 10:19:02 -0700 |
| commit | 1579f678fb4397f9e439d2e373d4ade036c673b4 (patch) | |
| tree | de58ed5329900dae5c1c437edf167533a1da750c /drivers/net | |
| parent | 06d7a1b932c26afe2c0a1f4520ddd417d8eeda79 (diff) | |
| download | linux-1579f678fb4397f9e439d2e373d4ade036c673b4.tar.gz linux-1579f678fb4397f9e439d2e373d4ade036c673b4.tar.bz2 linux-1579f678fb4397f9e439d2e373d4ade036c673b4.zip | |
net: stmmac: dwmac4: Re-enable MAC Rx before powering down
Re-enable the MAC receiver by setting CONFIG_RE before powering down,
as instructed in section 6.3.5.1 of [1]. Without this the MAC fails
to receive WoL packets and never wakes up.
[1] DWC Ethernet QoS Databook 4.10a October 2014
Signed-off-by: Ed Blake <ed.blake@sondrel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c index c4407e8e39a3..2f7d7ec59962 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c @@ -296,6 +296,7 @@ static void dwmac4_pmt(struct mac_device_info *hw, unsigned long mode) { void __iomem *ioaddr = hw->pcsr; unsigned int pmt = 0; + u32 config; if (mode & WAKE_MAGIC) { pr_debug("GMAC: WOL Magic frame\n"); @@ -306,6 +307,12 @@ static void dwmac4_pmt(struct mac_device_info *hw, unsigned long mode) pmt |= power_down | global_unicast | wake_up_frame_en; } + if (pmt) { + /* The receiver must be enabled for WOL before powering down */ + config = readl(ioaddr + GMAC_CONFIG); + config |= GMAC_CONFIG_RE; + writel(config, ioaddr + GMAC_CONFIG); + } writel(pmt, ioaddr + GMAC_PMT); } |