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Message-ID: <1439962444-27486-4-git-send-email-b38611@freescale.com>
Date: Wed, 19 Aug 2015 13:34:01 +0800
From: Fugang Duan <b38611@...escale.com>
To: <shawnguo@...nel.org>, <davem@...emloft.net>
CC: <linux-arm-kernel@...ts.infradead.org>, <netdev@...r.kernel.org>,
<b38611@...escale.com>
Subject: [PATCH v1 3/6] ARM: imx: add enet init for i.MX7D platform
Add enet phy fixup, clock source init for i.MX7D platform.
Signed-off-by: Fugang Duan <B38611@...escale.com>
---
arch/arm/mach-imx/mach-imx7d.c | 75 ++++++++++++++++++++++++++++++++++++++++--
1 file changed, 73 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-imx/mach-imx7d.c b/arch/arm/mach-imx/mach-imx7d.c
index 4d4a190..67d7939 100644
--- a/arch/arm/mach-imx/mach-imx7d.c
+++ b/arch/arm/mach-imx/mach-imx7d.c
@@ -5,13 +5,83 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#include <linux/irqchip.h>
-#include <linux/of_platform.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
+#include <linux/brcmphy.h>
+#include <linux/irqchip.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
#include "common.h"
+static int ar8031_phy_fixup(struct phy_device *dev)
+{
+ u16 val;
+
+ /* Set RGMII IO voltage to 1.8V */
+ phy_write(dev, 0x1d, 0x1f);
+ phy_write(dev, 0x1e, 0x8);
+
+ /* disable phy AR8031 SmartEEE function. */
+ phy_write(dev, 0xd, 0x3);
+ phy_write(dev, 0xe, 0x805d);
+ phy_write(dev, 0xd, 0x4003);
+ val = phy_read(dev, 0xe);
+ val &= ~(0x1 << 8);
+ phy_write(dev, 0xe, val);
+
+ /* introduce tx clock delay */
+ phy_write(dev, 0x1d, 0x5);
+ val = phy_read(dev, 0x1e);
+ val |= 0x0100;
+ phy_write(dev, 0x1e, val);
+
+ return 0;
+}
+
+static int bcm54220_phy_fixup(struct phy_device *dev)
+{
+ /* enable RXC skew select RGMII copper mode */
+ phy_write(dev, 0x1e, 0x21);
+ phy_write(dev, 0x1f, 0x7ea8);
+ phy_write(dev, 0x1e, 0x2f);
+ phy_write(dev, 0x1f, 0x71b7);
+
+ return 0;
+}
+
+#define PHY_ID_AR8031 0x004dd074
+static void __init imx7d_enet_phy_init(void)
+{
+ if (IS_BUILTIN(CONFIG_PHYLIB)) {
+ phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
+ ar8031_phy_fixup);
+ phy_register_fixup_for_uid(PHY_ID_BCM54220, 0xffffffff,
+ bcm54220_phy_fixup);
+ }
+}
+
+static void __init imx7d_enet_clk_sel(void)
+{
+ struct regmap *gpr;
+
+ gpr = syscon_regmap_lookup_by_compatible("fsl,imx7d-iomuxc-gpr");
+ if (!IS_ERR(gpr)) {
+ regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_TX_CLK_SEL_MASK, 0);
+ regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_CLK_DIR_MASK, 0);
+ } else {
+ pr_err("failed to find fsl,imx7d-iomux-gpr regmap\n");
+ }
+}
+
+static inline void imx7d_enet_init(void)
+{
+ imx7d_enet_phy_init();
+ imx7d_enet_clk_sel();
+}
+
static void __init imx7d_init_machine(void)
{
struct device *parent;
@@ -22,6 +92,7 @@ static void __init imx7d_init_machine(void)
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
imx_anatop_init();
+ imx7d_enet_init();
}
static void __init imx7d_init_irq(void)
--
1.9.1
--
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