regulator: ab8500-ext: Add support for AB9540 regulators

Add the support for ab9540 external regulators.

Signed-off-by: Michel JAOUEN <michel.jaouen@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c
index debae34..1e92e01 100644
--- a/drivers/regulator/ab8500-ext.c
+++ b/drivers/regulator/ab8500-ext.c
@@ -393,6 +393,12 @@
 		config.init_data = &pdata->ext_regulator[i];
 		config.driver_data = info;
 
+		if (is_ab9540(ab8500) &&
+		    ((info->desc.id == AB8500_EXT_SUPPLY1) ||
+		     (info->desc.id == AB8500_EXT_SUPPLY2) ||
+		     (info->desc.id == AB8500_EXT_SUPPLY3)))
+			info->desc.ops = &ab8500_ext_regulator_ops;
+
 		/* register regulator with framework */
 		info->rdev = regulator_register(&info->desc, &config);