netdev - [PATCH V2 3/3] net: bgmac: use PHY subsystem for initializing PHY

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Date:   Sat, 28 Jan 2017 22:08:32 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     Jon Mason <jon.mason@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Felix Fietkau <nbd@...nwrt.org>, netdev@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH V2 3/3] net: bgmac: use PHY subsystem for initializing PHY

From: Rafał Miłecki <rafal@...ecki.pl>

This adds support for using bgmac with PHYs supported by standalone PHY
drivers. Having any PHY initialization in bgmac is hacky and shouldn't
be extended but rather removed if anyone has hardware to test it.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c b/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
index 9d9984999dce..6ce80cbcb48e 100644
--- a/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
+++ b/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
@@ -132,6 +132,10 @@ static void bcma_mdio_phy_init(struct bgmac *bgmac)
 	struct bcma_chipinfo *ci = &bgmac->bcma.core->bus->chipinfo;
 	u8 i;
 
+	/* For some legacy hardware we do chipset-based PHY initialization here
+	 * without even detecting PHY ID. It's hacky and should be cleaned as
+	 * soon as someone can test it.
+	 */
 	if (ci->id == BCMA_CHIP_ID_BCM5356) {
 		for (i = 0; i < 5; i++) {
 			bcma_mdio_phy_write(bgmac, i, 0x1f, 0x008b);
@@ -140,6 +144,7 @@ static void bcma_mdio_phy_init(struct bgmac *bgmac)
 			bcma_mdio_phy_write(bgmac, i, 0x12, 0x2aaa);
 			bcma_mdio_phy_write(bgmac, i, 0x1f, 0x000b);
 		}
+		return;
 	}
 	if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg != 10) ||
 	    (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg != 10) ||
@@ -161,7 +166,12 @@ static void bcma_mdio_phy_init(struct bgmac *bgmac)
 			bcma_mdio_phy_write(bgmac, i, 0x17, 0x9273);
 			bcma_mdio_phy_write(bgmac, i, 0x1f, 0x000b);
 		}
+		return;
 	}
+
+	/* For all other hw do initialization using PHY subsystem. */
+	if (bgmac->net_dev && bgmac->net_dev->phydev)
+		phy_init_hw(bgmac->net_dev->phydev);
 }
 
 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyreset */
-- 
2.11.0