regulator: add smb208 support

Smb208 regulators are used on some ipq806x soc.
Add support for it to make it avaiable on some routers
that use it.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Adrian Panella <ianchi74@outlook.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200219163711.479-1-ansuelsmth@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/mfd/qcom-rpm.txt

@@ -61,6 +61,7 @@ Regulator nodes are identified by their compatible:
 		    "qcom,rpm-pm8901-regulators"
 		    "qcom,rpm-pm8921-regulators"
 		    "qcom,rpm-pm8018-regulators"
+		    "qcom,rpm-smb208-regulators"
 
 - vdd_l0_l1_lvs-supply:
 - vdd_l2_l11_l12-supply:
@@ -171,6 +172,9 @@ pm8018:
 	s1, s2, s3, s4, s5, , l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
 	l12, l14, lvs1
 
+smb208:
+	s1a, s1b, s2a, s2b
+
 The content of each sub-node is defined by the standard binding for regulators -
 see regulator.txt - with additional custom properties described below:
 

drivers/regulator/qcom_rpm-regulator.c

@@ -925,12 +925,21 @@ static const struct rpm_regulator_data rpm_pm8921_regulators[] = {
 	{ }
 };
 
+static const struct rpm_regulator_data rpm_smb208_regulators[] = {
+	{ "s1a",  QCOM_RPM_SMB208_S1a, &smb208_smps, "vin_s1a" },
+	{ "s1b",  QCOM_RPM_SMB208_S1b, &smb208_smps, "vin_s1b" },
+	{ "s2a",  QCOM_RPM_SMB208_S2a, &smb208_smps, "vin_s2a" },
+	{ "s2b",  QCOM_RPM_SMB208_S2b, &smb208_smps, "vin_s2b" },
+	{ }
+};
+
 static const struct of_device_id rpm_of_match[] = {
 	{ .compatible = "qcom,rpm-pm8018-regulators",
 		.data = &rpm_pm8018_regulators },
 	{ .compatible = "qcom,rpm-pm8058-regulators", .data = &rpm_pm8058_regulators },
 	{ .compatible = "qcom,rpm-pm8901-regulators", .data = &rpm_pm8901_regulators },
 	{ .compatible = "qcom,rpm-pm8921-regulators", .data = &rpm_pm8921_regulators },
+	{ .compatible = "qcom,rpm-smb208-regulators", .data = &rpm_smb208_regulators },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, rpm_of_match);