netdev - [PATCH net-next v2 5/5] net: stmmac: dwmac-sun8i: Add a shutdown callback

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Message-Id: <20210217042006.54559-6-samuel@sholland.org>
Date:   Tue, 16 Feb 2021 22:20:06 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Corentin Labbe <clabbe@...libre.com>
Cc:     Ondrej Jirman <megous@...ous.com>, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com, Samuel Holland <samuel@...lland.org>
Subject: [PATCH net-next v2 5/5] net: stmmac: dwmac-sun8i: Add a shutdown callback

The Ethernet MAC and PHY are usually major consumers of power on boards
which may not be able to fully power off (those with no PMIC). Powering
down the MAC and internal PHY saves power while these boards are "off".

Reviewed-by: Chen-Yu Tsai <wens@...e.org>
Signed-off-by: Samuel Holland <samuel@...lland.org>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
index a3d333b652836..6b75cf2603ffc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
@@ -1284,6 +1284,15 @@ static int sun8i_dwmac_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void sun8i_dwmac_shutdown(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
+
+	sun8i_dwmac_exit(pdev, gmac);
+}
+
 static const struct of_device_id sun8i_dwmac_match[] = {
 	{ .compatible = "allwinner,sun8i-h3-emac",
 		.data = &emac_variant_h3 },
@@ -1304,6 +1313,7 @@ MODULE_DEVICE_TABLE(of, sun8i_dwmac_match);
 static struct platform_driver sun8i_dwmac_driver = {
 	.probe  = sun8i_dwmac_probe,
 	.remove = sun8i_dwmac_remove,
+	.shutdown = sun8i_dwmac_shutdown,
 	.driver = {
 		.name           = "dwmac-sun8i",
 		.pm		= &stmmac_pltfr_pm_ops,
-- 
2.26.2