netdev - [PATCH v4 3/6] net: stmmac: dwmac-rk: add pd

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Date:   Fri,  2 Sep 2016 01:50:01 +0800
From:   Caesar Wang <wxt@...k-chips.com>
To:     Heiko Stuebner <heiko@...ech.de>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        dbasehore@...omium.org, David Wu <david.wu@...k-chips.com>,
        Caesar Wang <wxt@...k-chips.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 3/6] net: stmmac: dwmac-rk: add pd_gmac support for rk3399

From: David Wu <david.wu@...k-chips.com>

Add the gmac power domain support for rk3399, in order to save more
power consumption.

Signed-off-by: David Wu <david.wu@...k-chips.com>
Signed-off-by: Caesar Wang <wxt@...k-chips.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2:
- fixes the build error on next kernel.

 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index e2ba6c4..3740a44 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -30,6 +30,7 @@
 #include <linux/delay.h>
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
+#include <linux/pm_runtime.h>
 
 #include "stmmac_platform.h"
 
@@ -883,11 +884,19 @@ static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
 	if (ret)
 		return ret;
 
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+
 	return 0;
 }
 
 static void rk_gmac_powerdown(struct rk_priv_data *gmac)
 {
+	struct device *dev = &gmac->pdev->dev;
+
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+
 	phy_power_on(gmac, false);
 	gmac_clk_enable(gmac, false);
 }
-- 
1.9.1