ARM: ux500: Enable the clock controlling Ethernet on Snowball

This fixes a regression introduced by common clk enablement.

On some u8500 based boards, the FMSC clock which is usually used
for flash, is wired up to the SMSC911x Ethernet driver. However,
the SMSC911x doesn't have common clk support yet, rendering it
unusable. Prior to the introduction of common clk the FMSC clock
was default on; however, common clk disables all clocks by default
and insists drivers take responsibility to enable theirs.

This fix enables the FMSC clock on Snowball, subsequently turning
on the SMSC911x Ethernet chip. It will be removed when the driver
is compatible with common clk.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index b03457881c4..87d2d7b38ce 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/i2c.h>
 #include <linux/platform_data/i2c-nomadik.h>
@@ -439,6 +440,15 @@ static void mop500_prox_deactivate(struct device *dev)
 	regulator_put(prox_regulator);
 }
 
+void mop500_snowball_ethernet_clock_enable(void)
+{
+	struct clk *clk;
+
+	clk = clk_get_sys("fsmc", NULL);
+	if (!IS_ERR(clk))
+		clk_prepare_enable(clk);
+}
+
 static struct cryp_platform_data u8500_cryp1_platform_data = {
 		.mem_to_engine = {
 				.dir = STEDMA40_MEM_TO_PERIPH,
@@ -683,6 +693,8 @@ static void __init snowball_init_machine(void)
 	mop500_audio_init(parent);
 	mop500_uart_init(parent);
 
+	mop500_snowball_ethernet_clock_enable();
+
 	/* This board has full regulator constraints */
 	regulator_has_full_constraints();
 }