ARM: mx6: pmu: Expose PMU LDO configuration interface

Make the PMU LDO configuration interface available to board code,
so that board code can reconfigure the internal LDOs of the SoC.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Eric Nelson <eric@nelint.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: NEric Nelson <eric@nelint.com>

arch/arm/include/asm/arch-mx6/sys_proto.h

@@ -20,6 +20,14 @@
 int imx6_pcie_toggle_power(void);
 int imx6_pcie_toggle_reset(void);
 
+enum ldo_reg {
+	LDO_ARM,
+	LDO_SOC,
+	LDO_PU,
+};
+
+int set_ldo_voltage(enum ldo_reg ldo, u32 mv);
+
 /**
  * iomuxc_set_rgmii_io_voltage - set voltage level of RGMII/USB pins
  *

arch/arm/mach-imx/mx6/soc.c

@@ -24,12 +24,6 @@
 #include <imx_thermal.h>
 #include <mmc.h>
 
-enum ldo_reg {
-	LDO_ARM,
-	LDO_SOC,
-	LDO_PU,
-};
-
 struct scu_regs {
 	u32	ctrl;
 	u32	config;
@@ -255,7 +249,7 @@ static void clear_ldo_ramp(void)
  * Possible values are from 0.725V to 1.450V in steps of
  * 0.025V (25mV).
  */
-static int set_ldo_voltage(enum ldo_reg ldo, u32 mv)
+int set_ldo_voltage(enum ldo_reg ldo, u32 mv)
 {
 	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
 	u32 val, step, old, reg = readl(&anatop->reg_core);