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net: stmmac: disable/enable ptp_ref_clk in suspend/resume flow

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[ Upstream commit e497c20e20 ]

disable ptp_ref_clk in suspend flow, and enable it in resume flow.

Fixes: f573c0b9c4 ("stmmac: move stmmac_clk, pclk, clk_ptp_ref and stmmac_rst to platform structure")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Biao Huang
2019-10-15 11:24:44 +08:00
committed by Greg Kroah-Hartman
parent da4f0aed87
commit cd8c21ca70
1 changed files with 8 additions and 4 deletions
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12
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@@ -4522,8 +4522,10 @@ int stmmac_suspend(struct device *dev)
stmmac_mac_set(priv, priv->ioaddr, false);
pinctrl_pm_select_sleep_state(priv->device);
/* Disable clock in case of PWM is off */
clk_disable(priv->plat->pclk);
clk_disable(priv->plat->stmmac_clk);
if (priv->plat->clk_ptp_ref)
clk_disable_unprepare(priv->plat->clk_ptp_ref);
clk_disable_unprepare(priv->plat->pclk);
clk_disable_unprepare(priv->plat->stmmac_clk);
}
mutex_unlock(&priv->lock);
@@ -4588,8 +4590,10 @@ int stmmac_resume(struct device *dev)
} else {
pinctrl_pm_select_default_state(priv->device);
/* enable the clk previously disabled */
clk_enable(priv->plat->stmmac_clk);
clk_enable(priv->plat->pclk);
clk_prepare_enable(priv->plat->stmmac_clk);
clk_prepare_enable(priv->plat->pclk);
if (priv->plat->clk_ptp_ref)
clk_prepare_enable(priv->plat->clk_ptp_ref);
/* reset the phy so that it's ready */
if (priv->mii)
stmmac_mdio_reset(priv->mii);