From mboxrd@z Thu Jan 1 00:00:00 1970 From: Biao Huang Subject: [PATCH] net: stmmac: disable/enable ptp_ref_clk in suspend/resume flow Date: Wed, 9 Oct 2019 16:56:49 +0800 Message-ID: <20191009085649.6736-1-biao.huang@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: davem@davemloft.net, Jose Abreu , andrew@lunn.ch Cc: Giuseppe Cavallaro , Alexandre Torgue , Maxime Coquelin , Matthias Brugger , netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, yt.shen@mediatek.com, biao.huang@mediatek.com, jianguo.zhang@mediatek.com, boon.leong.ong@intel.com List-Id: linux-mediatek@lists.infradead.org disable ptp_ref_clk in suspend flow, and enable it in resume flow. Signed-off-by: Biao Huang --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index c7c9e5f162e6..b592aeecc3dd 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4469,6 +4469,8 @@ 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 */ + if (priv->plat->clk_ptp_ref) + clk_disable_unprepare(priv->plat->clk_ptp_ref); clk_disable(priv->plat->pclk); clk_disable(priv->plat->stmmac_clk); } @@ -4535,6 +4537,8 @@ int stmmac_resume(struct device *dev) /* enable the clk previously disabled */ clk_enable(priv->plat->stmmac_clk); clk_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); -- 2.18.0