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Commit cd8c21ca authored by Biao Huang's avatar Biao Huang Committed by Greg Kroah-Hartman
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net: stmmac: disable/enable ptp_ref_clk in suspend/resume flow 



[ Upstream commit e497c20e203680aba9ccf7bb475959595908ca7e ]

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

Fixes: f573c0b9 ("stmmac: move stmmac_clk, pclk, clk_ptp_ref and stmmac_rst to platform structure")
Signed-off-by: default avatarBiao Huang <biao.huang@mediatek.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent da4f0aed

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

+8 −4
Original line number Diff line number Diff line
@@ -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);