regulator: qcom_smd: Handle big endian CPUs

The smd rpm structures are always in little endian, but this
driver is not capable of being used on big endian CPUs. Annotate
the little endian data members and update the code to do the
proper byte swapping.
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/regulator/qcom_smd-regulator.c

@@ -36,9 +36,9 @@ struct qcom_rpm_reg {
 };
 
 struct rpm_regulator_req {
-	u32 key;
-	u32 nbytes;
-	u32 value;
+	__le32 key;
+	__le32 nbytes;
+	__le32 value;
 };
 
 #define RPM_KEY_SWEN	0x6e657773 /* "swen" */
@@ -62,9 +62,9 @@ static int rpm_reg_enable(struct regulator_dev *rdev)
 	struct rpm_regulator_req req;
 	int ret;
 
-	req.key = RPM_KEY_SWEN;
-	req.nbytes = sizeof(u32);
-	req.value = 1;
+	req.key = cpu_to_le32(RPM_KEY_SWEN);
+	req.nbytes = cpu_to_le32(sizeof(u32));
+	req.value = cpu_to_le32(1);
 
 	ret = rpm_reg_write_active(vreg, &req, sizeof(req));
 	if (!ret)
@@ -86,8 +86,8 @@ static int rpm_reg_disable(struct regulator_dev *rdev)
 	struct rpm_regulator_req req;
 	int ret;
 
-	req.key = RPM_KEY_SWEN;
-	req.nbytes = sizeof(u32);
+	req.key = cpu_to_le32(RPM_KEY_SWEN);
+	req.nbytes = cpu_to_le32(sizeof(u32));
 	req.value = 0;
 
 	ret = rpm_reg_write_active(vreg, &req, sizeof(req));
@@ -113,9 +113,9 @@ static int rpm_reg_set_voltage(struct regulator_dev *rdev,
 	struct rpm_regulator_req req;
 	int ret = 0;
 
-	req.key = RPM_KEY_UV;
-	req.nbytes = sizeof(u32);
-	req.value = min_uV;
+	req.key = cpu_to_le32(RPM_KEY_UV);
+	req.nbytes = cpu_to_le32(sizeof(u32));
+	req.value = cpu_to_le32(min_uV);
 
 	ret = rpm_reg_write_active(vreg, &req, sizeof(req));
 	if (!ret)
@@ -129,9 +129,9 @@ static int rpm_reg_set_load(struct regulator_dev *rdev, int load_uA)
 	struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
 	struct rpm_regulator_req req;
 
-	req.key = RPM_KEY_MA;
-	req.nbytes = sizeof(u32);
-	req.value = load_uA;
+	req.key = cpu_to_le32(RPM_KEY_MA);
+	req.nbytes = cpu_to_le32(sizeof(u32));
+	req.value = cpu_to_le32(load_uA);
 
 	return rpm_reg_write_active(vreg, &req, sizeof(req));
 }