OMAP: DSS2: Use vdds_sdi regulator supply in SDI

This patch enables the use of vdds_sdi regulator in SDI subsystem.
We can disable the vdds_sdi voltage when not in use to save
power.

Signed-off-by: Roger Quadros <roger.quadros@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 3de3c1e559aa..ee07a3cc22ef 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -23,13 +23,16 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/err.h>
+#include <linux/regulator/consumer.h>
 
 #include <plat/display.h>
+#include <plat/cpu.h>
 #include "dss.h"
 
 static struct {
         bool skip_init;
         bool update_enabled;
+        struct regulator *vdds_sdi_reg;
 } sdi;
 
 static void sdi_basic_init(void)
@@ -57,6 +60,10 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
                 goto err0;
         }
 
+        r = regulator_enable(sdi.vdds_sdi_reg);
+        if (r)
+                goto err1;
+
         /* In case of skip_init sdi_init has already enabled the clocks */
         if (!sdi.skip_init)
                 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
@@ -120,6 +127,7 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
         return 0;
 err2:
         dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
+        regulator_disable(sdi.vdds_sdi_reg);
 err1:
         omap_dss_stop_device(dssdev);
 err0:
@@ -135,6 +143,8 @@ void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)
 
         dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
 
+        regulator_disable(sdi.vdds_sdi_reg);
+
         omap_dss_stop_device(dssdev);
 }
 EXPORT_SYMBOL(omapdss_sdi_display_disable);
@@ -151,6 +161,11 @@ int sdi_init(bool skip_init)
         /* we store this for first display enable, then clear it */
         sdi.skip_init = skip_init;
 
+        sdi.vdds_sdi_reg = dss_get_vdds_sdi();
+        if (IS_ERR(sdi.vdds_sdi_reg)) {
+                DSSERR("can't get VDDS_SDI regulator\n");
+                return PTR_ERR(sdi.vdds_sdi_reg);
+        }
         /*
          * Enable clocks already here, otherwise there would be a toggle
          * of them until sdi_display_enable is called.