OMAPDSS: DSI: set regulator voltage to 1.8V

Set the DSI vdd regulator voltage to the required 1.8V.

This is required for the case when the regulator in the DT data defines
a range of allowed voltages. In this case it's required to set the
voltage, as otherwise enabling the voltage fails.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/video/fbdev/omap2/dss/dsi.c b/drivers/video/fbdev/omap2/dss/dsi.c
index 8be9b04d8849..57f120896b43 100644
--- a/drivers/video/fbdev/omap2/dss/dsi.c
+++ b/drivers/video/fbdev/omap2/dss/dsi.c
@@ -1161,6 +1161,7 @@ static int dsi_regulator_init(struct platform_device *dsidev)
 {
         struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
         struct regulator *vdds_dsi;
+        int r;
 
         if (dsi->vdds_dsi_reg != NULL)
                 return 0;
@@ -1173,6 +1174,15 @@ static int dsi_regulator_init(struct platform_device *dsidev)
                 return PTR_ERR(vdds_dsi);
         }
 
+        if (regulator_can_change_voltage(vdds_dsi)) {
+                r = regulator_set_voltage(vdds_dsi, 1800000, 1800000);
+                if (r) {
+                        devm_regulator_put(vdds_dsi);
+                        DSSERR("can't set the DSI regulator voltage\n");
+                        return r;
+                }
+        }
+
         dsi->vdds_dsi_reg = vdds_dsi;
 
         return 0;