omap4: support TPS programming

TPS62361 is the new power supply used in OMAP4460 that
supplies vdd_mpu.

VCORE1 from Phoenix supplies vdd_core and VCORE2 supplies
vdd_iva. VCORE3 is not used in OMAP4460.

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c
index 3c61b1c..5943d61 100644
--- a/arch/arm/cpu/armv7/omap4/board.c
+++ b/arch/arm/cpu/armv7/omap4/board.c
@@ -90,6 +90,10 @@
 	do_set_mux(CONTROL_PADCONF_WKUP, wkup_padconf_array_essential,
 		   sizeof(wkup_padconf_array_essential) /
 		   sizeof(struct pad_conf_entry));
+
+	/* gpio_wk7 is used for controlling TPS on 4460 */
+	if (omap_revision() >= OMAP4460_ES1_0)
+		writew(M3, CONTROL_WKUP_PAD1_FREF_CLK4_REQ);
 }
 
 static void set_mux_conf_regs(void)