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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>
This commit is contained in:
Roger Quadros 2010-03-17 13:35:21 +01:00 committed by Tomi Valkeinen
parent b1d145b6d3
commit 508886cf98
1 changed files with 15 additions and 0 deletions
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15
drivers/video/omap2/dss/sdi.c
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@ -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.