linux-kernel - [PATCH] net: fec: generate warning when using deprecated phy reset

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Message-Id: <20190718143428.2392-1-TheSven73@gmail.com>
Date:   Thu, 18 Jul 2019 10:34:28 -0400
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Fugang Duan <fugang.duan@....com>
Cc:     "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] net: fec: generate warning when using deprecated phy reset

Allowing the fec to reset its PHY via the phy-reset-gpios
devicetree property is deprecated. To improve developer
awareness, generate a warning whenever the deprecated
property is used.

Signed-off-by: Sven Van Asbroeck <TheSven73@...il.com>
---
 drivers/net/ethernet/freescale/fec_main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 38f10f7dcbc3..00e1b5e4ef71 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3244,6 +3244,12 @@ static int fec_reset_phy(struct platform_device *pdev)
 	else if (!gpio_is_valid(phy_reset))
 		return 0;
 
+	/* Recommended way to provide a PHY reset:
+	 * - create a phy devicetree node, and link it to its fec (phy-handle)
+	 * - add your reset gpio to the phy devicetree node
+	 */
+	dev_warn(&pdev->dev, "devicetree: phy-reset-gpios is deprecated\n");
+
 	err = of_property_read_u32(np, "phy-reset-post-delay", &phy_post_delay);
 	/* valid reset duration should be less than 1s */
 	if (!err && phy_post_delay > 1000)
-- 
2.17.1