[PATCH 6/7] ARM: microsom: make ETH work on production modules

[Lucas Stach]

The pre-production modules had an external crystal to generate the PHY
reference clock. Production modules rely on the i.MX6 to output the
correct clock.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 arch/arm/boards/solidrun-microsom/board.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boards/solidrun-microsom/board.c b/arch/arm/boards/solidrun-microsom/board.c
index 280653f5b8d1..28a60b9e8c79 100644
--- a/arch/arm/boards/solidrun-microsom/board.c
+++ b/arch/arm/boards/solidrun-microsom/board.c
@@ -25,6 +25,7 @@
 #include <mach/imx6-regs.h>
 #include <mach/imx6.h>
 #include <mfd/imx6q-iomuxc-gpr.h>
+#include <linux/clk.h>
 #include <linux/sizes.h>
 #include <linux/phy.h>
 
@@ -61,13 +62,26 @@ static int ar8035_phy_fixup(struct phy_device *dev)
 	return 0;
 }
 
+static void microsom_eth_init(void)
+{
+	void __iomem *iomux = (void *)MX6_IOMUXC_BASE_ADDR;
+	u32 val;
+
+	clk_set_rate(clk_lookup("enet_ref"), 25000000);
+
+	val = readl(iomux + IOMUXC_GPR1);
+	val |= IMX6Q_GPR1_ENET_CLK_SEL_ANATOP;
+	writel(val, iomux + IOMUXC_GPR1);
+
+	phy_register_fixup_for_uid(0x004dd072, 0xffffffef, ar8035_phy_fixup);
+}
 static int hummingboard_device_init(void)
 {
 	if (!of_machine_is_compatible("solidrun,hummingboard/dl") &&
 	    !of_machine_is_compatible("solidrun,hummingboard/q"))
 		return 0;
 
-	phy_register_fixup_for_uid(0x004dd072, 0xffffffef, ar8035_phy_fixup);
+	microsom_eth_init();
 
 	/* enable USB VBUS */
 	gpio_direction_output(IMX_GPIO_NR(3, 22), 1);
-- 
2.6.1