From: Sven Eckelmann <sven.eckelmann@open-mesh.com>
Date: Wed, 16 Mar 2016 09:27:11 +0000
Subject: ar71xx: Use PHY fixups for Open Mesh MR900

The delays of PHY/MAC on the MR900 are done by u-boot and OpenWrt in
different ways. u-boot only modifies the ETH_CFG of the QCA955x based on
the link speed. But OpenWrt can only modify the PHY delays based on the
link speed.

This can lead to communication problems when u-boot initializes the ETH_CFG
for a specific link speed (e.g. 10BASE-T) but then OpenWrt the sets the PHY
delays to an incompatible value.

Instead reset the ETH_CFG delay bits of the QCA955x to a specific value and
only rely on the AT803x PHY settings.

Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>

Backport of r49030

Forwarded: https://patchwork.ozlabs.org/patch/624185/

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-mr900.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-mr900.c
index 9c3164d..3634bf0 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-mr900.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-mr900.c
@@ -23,6 +23,7 @@
 #include <linux/ath9k_platform.h>
 
 #include <asm/mach-ath79/ar71xx_regs.h>
+#include <linux/platform_data/phy-at803x.h>
 
 #include "common.h"
 #include "dev-ap9x-pci.h"
@@ -94,15 +95,30 @@ static struct gpio_keys_button mr900_gpio_keys[] __initdata = {
 	},
 };
 
+static struct at803x_platform_data mr900_at803x_data = {
+	.disable_smarteee = 1,
+	.enable_rgmii_rx_delay = 1,
+	.enable_rgmii_tx_delay = 0,
+	.fixup_rgmii_tx_delay = 1,
+};
+
+static struct mdio_board_info mr900_mdio0_info[] = {
+	{
+		.bus_id = "ag71xx-mdio.0",
+		.phy_addr = 5,
+		.platform_data = &mr900_at803x_data,
+	},
+};
+
 static void __init mr900_setup(void)
 {
 	u8 *art = (u8 *)KSEG1ADDR(0x1fff0000);
 	u8 mac[6], pcie_mac[6];
 	struct ath9k_platform_data *pdata;
 
-	ath79_eth0_pll_data.pll_1000 = 0xbe000101;
-	ath79_eth0_pll_data.pll_100 = 0x80000101;
-	ath79_eth0_pll_data.pll_10 = 0x80001313;
+	ath79_eth0_pll_data.pll_1000 = 0xae000000;
+	ath79_eth0_pll_data.pll_100 = 0xa0000101;
+	ath79_eth0_pll_data.pll_10 = 0xa0001313;
 
 	ath79_register_m25p80(NULL);
 
@@ -126,6 +142,9 @@ static void __init mr900_setup(void)
 	ath79_setup_qca955x_eth_cfg(QCA955X_ETH_CFG_RGMII_EN);
 	ath79_register_mdio(0, 0x0);
 
+	mdiobus_register_board_info(mr900_mdio0_info,
+				    ARRAY_SIZE(mr900_mdio0_info));
+
 	ath79_init_mac(ath79_eth0_data.mac_addr, art + MR900_MAC0_OFFSET, 0);
 
 	/* GMAC0 is connected to the RMGII interface */