ARM: ux500: Provide a mechanism to over-ride regulator init values

If particular platforms require non-standard initialisation values,
they can use this function to adapt them as required.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

arch/arm/mach-ux500/board-mop500-regulators.c

@@ -476,3 +476,21 @@ struct ab8500_regulator_platform_data ab8500_regulator_plat_data = {
 	.ext_regulator          = ab8500_ext_regulators,
 	.num_ext_regulator      = ARRAY_SIZE(ab8500_ext_regulators),
 };
+
+static void ab8500_modify_reg_init(int id, u8 mask, u8 value)
+{
+	int i;
+
+	for (i = ARRAY_SIZE(ab8500_reg_init) - 1; i >= 0; i--) {
+		if (ab8500_reg_init[i].id == id) {
+			u8 initval = ab8500_reg_init[i].value;
+			initval = (initval & ~mask) | (value & mask);
+			ab8500_reg_init[i].value = initval;
+
+			BUG_ON(mask & ~ab8500_reg_init[i].mask);
+			return;
+		}
+	}
+
+	BUG_ON(1);
+}