[RFC][PATCH 3/3] OMAP: DSS2: Use vdds_sdi regulator supply in SDI

Roger Quadros
2010-03-12T15:28:29Z

From: Roger Quadros <roger.quadros@nokia.com>

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>
---
drivers/video/omap2/dss/sdi.c | 23 +++++++++++++++++++++--
1 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 45aab89..e816e80 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 +60,12 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
goto err0;
}

+ if (cpu_is_omap34xx()) {
+ 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);
@@ -118,10 +127,10 @@ int omapdss_sdi_display_enable(struct omap_dss_device *dssdev)
sdi.skip_init = 0;

return 0;
-err3:
- dssdev->manager->disable(dssdev->manager);
err2:
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
+ if (cpu_is_omap34xx())
+ regulator_enable(sdi.vdds_sdi_reg);
err1:
omap_dss_stop_device(dssdev);
err0:
@@ -137,6 +146,9 @@ void omapdss_sdi_display_disable(struct omap_dss_device *dssdev)

dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);

+ if (cpu_is_omap34xx())
+ regulator_enable(sdi.vdds_sdi_reg);
+
omap_dss_stop_device(dssdev);
}
EXPORT_SYMBOL(omapdss_sdi_display_disable);
@@ -144,6 +156,13 @@ EXPORT_SYMBOL(omapdss_sdi_display_disable);
int sdi_init_display(struct omap_dss_device *dssdev)
{
DSSDBG("SDI init\n");
+ if (cpu_is_omap34xx()) {
+ 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);
+ }
+ }

return 0;
}
--
1.6.0.4