msm: mdss: Replace msleep() with usleep()

Replace msleep() with usleep() in the display's voltage regulator
enable/disable

Signed-off-by: Bang Nguyen <bnguyen1@motorola.com>

drivers/video/msm/mdss/mdss_io_util.c

@@ -224,7 +224,9 @@ int msm_dss_enable_vreg(struct dss_vreg *in_vreg, int num_vreg, int enable)
 				goto vreg_set_opt_mode_fail;
 			}
 			if (in_vreg[i].pre_on_sleep)
-				msleep(in_vreg[i].pre_on_sleep);
+				usleep_range(in_vreg[i].pre_on_sleep * 1000,
+						in_vreg[i].pre_on_sleep * 1000);
+
 			rc = regulator_set_optimum_mode(in_vreg[i].vreg,
 				in_vreg[i].enable_load);
 			if (rc < 0) {
@@ -235,7 +237,8 @@ int msm_dss_enable_vreg(struct dss_vreg *in_vreg, int num_vreg, int enable)
 			}
 			rc = regulator_enable(in_vreg[i].vreg);
 			if (in_vreg[i].post_on_sleep)
-				usleep_range(in_vreg[i].post_on_sleep, in_vreg[i].post_on_sleep);
+				usleep_range(in_vreg[i].post_on_sleep * 1000,
+					in_vreg[i].post_on_sleep * 1000);
 			if (rc < 0) {
 				DEV_ERR("%pS->%s: %s enable failed\n",
 					__builtin_return_address(0), __func__,
@@ -247,12 +250,17 @@ int msm_dss_enable_vreg(struct dss_vreg *in_vreg, int num_vreg, int enable)
 		for (i = num_vreg-1; i >= 0; i--)
 			if (regulator_is_enabled(in_vreg[i].vreg)) {
 				if (in_vreg[i].pre_off_sleep)
-					msleep(in_vreg[i].pre_off_sleep);
+					usleep_range(
+					in_vreg[i].pre_off_sleep * 1000,
+					in_vreg[i].pre_off_sleep * 1000);
+
 				regulator_set_optimum_mode(in_vreg[i].vreg,
 					in_vreg[i].disable_load);
 				regulator_disable(in_vreg[i].vreg);
 				if (in_vreg[i].post_off_sleep)
-					msleep(in_vreg[i].post_off_sleep);
+					usleep_range(
+					in_vreg[i].post_off_sleep * 1000,
+					in_vreg[i].post_off_sleep * 1000);
 			}
 	}
 	return rc;