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author | Joakim Zhang <qiangqing.zhang@nxp.com> | 2021-03-15 20:16:46 +0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2021-03-15 14:46:21 -0700 |
commit | 5ec55823438e850c91c6b92aec93fb04ebde29e2 (patch) | |
tree | c1a2157632c7e16770a5a1ac557aac9862884ab9 /drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | |
parent | 91de5ac99a6e53ade273722b3335bba1c262899d (diff) | |
download | linux-stable-5ec55823438e850c91c6b92aec93fb04ebde29e2.tar.gz linux-stable-5ec55823438e850c91c6b92aec93fb04ebde29e2.tar.bz2 linux-stable-5ec55823438e850c91c6b92aec93fb04ebde29e2.zip |
net: stmmac: add clocks management for gmac driver
This patch intends to add clocks management for stmmac driver:
If CONFIG_PM enabled:
1. Keep clocks disabled after driver probed.
2. Enable clocks when up the net device, and disable clocks when down
the net device.
If CONFIG_PM disabled:
Keep clocks always enabled after driver probed.
Note:
1. It is fine for ethtool, since the way of implementing ethtool_ops::begin
in stmmac is only can be accessed when interface is enabled, so the clocks
are ticked.
2. The MDIO bus has a different life cycle to the MAC, need ensure
clocks are enabled when _mdio_read/write() need clocks, because these
functions can be called while the interface it not opened.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c')
-rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 6dc9f10414e4..a70b0bc84b2a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -744,10 +744,30 @@ static int stmmac_pltfr_resume(struct device *dev) return stmmac_resume(dev); } + +static int stmmac_runtime_suspend(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + struct stmmac_priv *priv = netdev_priv(ndev); + + stmmac_bus_clks_config(priv, false); + + return 0; +} + +static int stmmac_runtime_resume(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + struct stmmac_priv *priv = netdev_priv(ndev); + + return stmmac_bus_clks_config(priv, true); +} #endif /* CONFIG_PM_SLEEP */ -SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend, - stmmac_pltfr_resume); +const struct dev_pm_ops stmmac_pltfr_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_suspend, stmmac_pltfr_resume) + SET_RUNTIME_PM_OPS(stmmac_runtime_suspend, stmmac_runtime_resume, NULL) +}; EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops); MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support"); |